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As filed with the Securities and Exchange Commission on September 20, 2017

August 10, 2021

Registration No. 333-

UNITED STATES


SECURITIES AND EXCHANGE COMMISSION

WASHINGTON,

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

MARKER THERAPEUTICS, INC.
(Exact name of registrant as specified in its charter)
Delaware
TAPIMMUNE INC.
 (Name of Issuer as Specified in Its Charter)
Nevada
(State or other jurisdiction of incorporation)
incorporation or organization)
45-4497941
(I.R.S. Employer
Identification Number)

3200 Southwest Freeway, Suite 2500
Houston, Texas 77027
(713) 400-6400
(Address, including zip code, and telephone number, including area code of registrant’s principal executive offices)
Peter Hoang
President, Chief Executive Officer and Director
Marker Therapeutics, Inc.
3200 Southwest Freeway, Suite 2500
Houston, Texas 77027
(713) 400-6400
2834
45-4497941
(Primary Standard Industrial Classification Code Number)(IRS Employer Identification No.)

5 West Forsyth Street, Suite 200

Jacksonville, FL 32202

904-516-5436
(Address including zip code, and telephone number, including area code, of registrant’s principal executive offices)
Sierra Corporate Services
100 West Liberty Street, 10th Floor
Reno, Nevada 89501
(775) 788-2000

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Mark

Divakar Gupta
Darren DeStefano
Madison A. Catchur

Shumaker, Loop & Kendrick,Jones
Cooley LLP

101 E. Kennedy Blvd., Suite 2800

Tampa, FL 33602

Telephone: 813-229-7600

Fax: 813-229-1660


55 Hudson Yards
New York, New York 10001
(212) 479-6000

From time to time after the effective date of this Registration Statement
(Approximate date of commencement of proposed sale to the public:
from time to time after this registration statement becomes effective as the selling shareholders shall determine.

public)

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box:¨

box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box:x

box. ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, of 1933, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.¨


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If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.¨

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer
Accelerated filer
Non-accelerated filer
Smaller reporting company
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 4057(a)(2)(B) of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Large accelerated filer ¨Accelerated filer¨

Non-accelerated filer ¨

Smaller reporting companyx
(Do not check if a smaller reporting company)

Emerging growth company¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.¨

CALCULATION OF REGISTRATION FEE

Title of Each Class of Securities to Be
Registered
 Amount to
Be
Registered
  Proposed
Maximum
Offering
Price
Per
Security
(1)
  Proposed
Maximum
Aggregate
Offering
Price (1)
  Amount of
Registration
Fee (1)
 
Common Stock 3,157,490    $3.12  $9,860,842  $1,142.87 
Total: 3,157,490    3.12    9,860,842  $1,142.87 

(1)Estimated solely for the purpose of calculating the registration fee
Title of each class of securities to be registered
Amount to be
Registered
Proposed Maximum
Offering Price per Unit
Proposed Maximum
Aggregate
Offering Price
Amount of
Registration Fee(1)
Common Stock, par value $0.001 per share
(2)
(3)
(3)
Preferred Stock, par value $0.001 per share
(2)
(3)
(3)
Debt Securities
(2)
(3)
(3)
Warrants
(2)
(3)
(3)
Total
(2)
$300,000,000$32,730
(1)
Calculated pursuant to Rule 457 under the Securities Act of 1933, as amended.

This Registration Statement contains a combined prospectus under Rule 429 promulgated457(o) under the Securities Act of 1933, whichas amended, or the Securities Act.

(2)
There are being registered hereunder such indeterminate number of shares of common stock and preferred stock, such indeterminate principal amount of debt securities and such indeterminate number of warrants to purchase common stock, preferred stock or debt securities as shall have an aggregate initial offering price not to exceed $300,000,000. If any debt securities are issued at an original issue discount, then the principal amount of such debt securities shall be in such greater amount as shall result in an aggregate initial offering price not to exceed $300,000,000, less the aggregate dollar amount of all securities previously issued hereunder. Any securities registered hereunder may be sold separately or in combination with other securities registered hereunder. The securities registered also relatesinclude such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for preferred stock or debt securities that provide for conversion or exchange, upon exercise of warrants or pursuant to (i) the anti-dilution provisions of any such securities. In addition, pursuant to Rule 416 under the Securities Act, the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions.
(3)
The proposed maximum aggregate offering price per class of security will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security pursuant to General Instruction II.D. of Form S-3 registration statement (File No. 333-196115), initially filed May 20, 2014 and originally declared effective byunder the SEC on July 23, 2014, as last amended by the Form S-3 registration statementSecurities Act.
(File No. 333-215258),initially filed on December 22, 2016, and declared effective by the SEC on January 18, 2017; (ii)the Form S-1 registration statement (File No. 333-205757), initially filed July 20, 2015 and originally declared effective by the SEC on August 7, 2015, as last amended by the Form S-3 registration statement (File No. 333-215258),initially filed on December 22, 2016, and declared effective by the SEC on January 18, 2017, and (iii) the Form S-3 registration statement (File No. 333-215258), initially filed December 22, 2016, and originally declared effective by the SEC on January 18, 2017. Upon effectiveness, this Registration Statement will also act as a post-effective amendment to the three earlier registration statements.

The Registrantregistrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the Registrantregistrant shall file a further amendment whichthat specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until thethis registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.


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EXPLANATORY NOTE
This registration statement contains:

a base prospectus, which covers the offering, issuance and sale by the registrant of up to a maximum aggregate offering price of $300,000,000 of the registrant’s common stock, preferred stock, debt securities and/or warrants from time to time in one or more offerings; and

a sales agreement prospectus, which covers the offering, issuance and sale by the registrant of up to a maximum aggregate offering price of $75,000,000 of the registrant’s common stock that may be issued and sold from time to time under the Controlled Equity OfferingSM Sales Agreement, dated August 10, 2021, with Cantor Fitzgerald & Co. and RBC Capital Markets, LLC.
The base prospectus immediately follows this explanatory note. The specific terms of any securities to be offered pursuant to the base prospectus will be specified in a prospectus supplement to the base prospectus. The sales agreement prospectus immediately follows the base prospectus. The $75,000,000 of common stock that may be offered, issued and sold by the registrant under the sales agreement prospectus is included in the $300,000,000 of securities that may be offered, issued and sold by the registrant under the base prospectus. In connection with such offers and when accompanied by the base prospectus included in the registration statement of which this prospectus forms a part, such sales agreement prospectus will be deemed a prospectus supplement to such base prospectus. Upon termination of the sales agreement with Cantor Fitzgerald & Co. and RBC Capital Markets, LLC, any portion of the $75,000,000 included in the sales agreement prospectus that is not sold pursuant to the sales agreement will be available for sale in other offerings pursuant to the base prospectus and a corresponding prospectus supplement, and if no shares are sold under the sales agreement, the full $300,000,000 of securities may be sold in other offerings pursuant to the base prospectus and a corresponding prospectus supplement.


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The information in this prospectus is not complete and may be changed. We may not sell these securities or accept an offer to buy these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities, and we areit is not soliciting offers to buy these securities in any jurisdictionstate where thesuch offer or sale is not permitted.

Subject

SUBJECT TO COMPLETION, DATED AUGUST 10, 2021
PROSPECTUS
[MISSING IMAGE: lg_markertherapeutics-4clr.jpg]
$300,000,000
Common Stock
Preferred Stock
Debt Securities
Warrants
From time to Completion—Dated September 20, 2017

PROSPECTUS

https:||www.sec.gov|Archives|edgar|data|1094038|000114420416140950|pg3img1_s3.jpg 

10,866,425 Sharestime, we may offer and sell up to $300,000,000 of Common Stock

any combination of the securities described in this prospectus in one or more offerings. We are registering for resale 4,408,014 shares of our common stock which are currently held by the selling stockholders named herein.

We are registering 6,458,411 shares of our common stockmay also offer securities as may be issuable upon theconversion, redemption, repurchase, exchange or exercise of any securities registered hereunder, including any applicable anti-dilution provisions.

This prospectus provides a general description of the following warrants held bysecurities we may offer. Each time we offer securities, we will provide specific terms of the selling shareholders named herein:

·157,233shares of common stock issuable upon exercise of warrants issued on August 13, 2014,
·208,333shares of common stock issuable upon exercise of Series A Warrants,
·416,667shares of common stock issuable upon exercise of Series A-1 Warrants,
·418,333shares of common stock issuable upon exercise of Series C Warrants,
·610,000shares of common stock issuable upon exercise of Series D Warrants,
·416,667shares of common stock issuable upon exercise of Series D-1 Warrants,
·442,074shares of common stock issuable upon exercise of Series E Warrants,
·416,667shares of common stock issuable upon exercise of Series E-1 Warrants,
·583,333shares of common stock issuable upon exercise of Series F Warrants,
·416,667shares of common stock issuable upon exercise of Series F-1 Warrants,
·653,187shares of common stock issuable upon exercise of five-year warrants to purchase one share of our common  stock for $6.00 (the “2016 PIPE Warrants”), and
·65,327shares of common stock issuable upon exercise of five-year warrants to purchase one share of our common  stock for $4.80 (the “2016 Broker PIPE Warrants”),
·1,503,567shares of common stock issuable upon exercise of five-year warrants to purchase one share of our common  stock for $3.97 (the “2017 PIPE Warrants”),
·150,356shares of common stock issuable upon exercise of five-year warrants to purchase one share of our common  stock for $3.97 (the “ 2017 Broker PIPE Warrants”),

securities offered in order fora supplement to this prospectus. We may also authorize one or more free writing prospectuses to be provided to you in connection with these offerings. The prospectus supplement and any related free writing prospectus may also add, update or change information contained in this prospectus. You should carefully read this prospectus, the holders of such warrants to exercise the warrants, in their discretion,applicable prospectus supplement and any related free writing prospectus, as well as for the resale of such shares of common stockany documents incorporated by the selling stockholders.

The table below sets forth the exercise prices of our outstanding warrants:

Warrant Type 

Exercise Price Per

Share, Subject to

Adjustments

  

Number of

Warrants

 
August 2014 $14.04   157,233 
Series A $1.20   208,333 
Series A-1 $1.20   416,667 
Series C $6.00   104,583 
Series C* $4.00   313,750 
Series D $9.00   297,500 
Series D* $4.00   312,500 
Series D-1 $9.00   416,667 
Series E $15.00   255,519 
Series E* $4.50   186,555 
Series E-1 $15.00   416,667 
Series F $7.20   290,833 
Series F* $4.00   292,500 
Series F-1 $7.20   416,667 
2016 Broker PIPE $4.80   65,327 
2016 PIPE* $3.97   653,187 
2017 Broker PIPE $3.97   150,356 
2017 PIPE $3.97   1,503,567 

* On June 23, 2017, certain existing institutional shareholders of TapImmune who hold various outstanding warrants to purchase our common stock, entered into warrant exercise agreements,reference, before you invest in which we agreed to reduce the exercise price for 75%any of the investors’ existing Series C, Series D, Series E and Series F Warrants. In connection with the private placementsecurities being offered.

This prospectus may not be used to consummate a sale of common stock in June 2017, the Company reduced the exercise price for the warrants to purchase an aggregate of 653,187 shares of common stock issuedany securities unless accompanied by a prospectus supplement.
We will sell these securities directly to investors, inthrough agents designated from time to time or to or through underwriters or dealers, on a continuous or delayed basis. For additional information on the private placement that closed in August 2016 from $6.00 per share to $3.97 per share.

The termsmethods of the Series A, Series D and Series E Warrants provide that in no event shall shares of common stock be issued to any holder of those Warrantssale, you should refer to the extent such issuances of shares of common stock would result in such holder having ownership in excess of 4.9% of our outstanding shares of common stock. The terms of the Warrants issued in August 2014, Series C and Series F Warrants provide that in no event shall shares of common stock be issued to any holder of those Warrants to the extent such issuances of shares of common stock would result in such holder having ownership in excess of 9.9% of our outstanding shares of common stock. The terms of the Series A-1, Series D-1, Series E-1 and Series F-1 Warrants provide that in no event shall shares of common stock be issued to any holder of those Warrants to the extent such issuances of shares of common stock would result in such holder having ownership in excess of 49.9% of our outstanding shares of common stock.

The prices at which the selling stockholders may sell the shares of common stock underlying the securities held by them will be determined by the prevailing market price for the shares or in negotiated transactions. We provide more information on how the selling stockholders may resell their respective shares of our common stock in the Section titledsection entitled “Plan of Distribution” beginning on page 7. We are not selling any securities underin this prospectus and we will not receive proceeds fromin the applicable prospectus supplement. If any agents or underwriters are involved in the sale of any securities with respect to which this prospectus is being delivered, the shares by the selling stockholders, except pursuantnames of such agents or underwriters and any applicable fees, commissions, discounts or over-allotment options will be set forth in a prospectus supplement. The price to the exercisepublic of such securities and the Warrants.

We are obligatednet proceeds we expect to pay the expenses of registering these shares, but all selling and other expenses incurred by the selling stockholdersreceive from such sale will also be paid by the selling stockholder.

set forth in a prospectus supplement.

Our common stock is quotedtraded on theThe Nasdaq CapitalGlobal Market under the symbol “TPIV.“MRKR.” On September 18, 2017,August 6, 2021, the last reported sale price of our common stock was $2.07 per share. The applicable prospectus supplement will contain information, where applicable, as to any other listing on theThe Nasdaq CapitalGlobal Market was $3.07 per share, and we had 10,271,696 shares of common stock outstanding.

This prospectus provides a general descriptionor any securities market or other exchange of the securities, being offered. You should carefully read thisif any, covered by the prospectus and the registration statement of which it forms a part carefully before you invest in any securities.

supplement.

Investing in our securities involves risks.a high degree of risk. You should review carefully the risks and uncertainties described under the heading “Risk Factors” beginning on page 2.

Neithercontained in the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is, 2017.

Table of Contents

Page
About This Prospectusi
Forward-Looking Statementsii
Prospectus Summary1
Risk Factors2
Use of Proceeds2
Determination of Offering Price2
Selling Stockholders2
Plan of Distribution7
Description of Securities9
Experts14
Legal Matters14
Disclosure of Commission Position of Indemnification For Securities Act Liabilities14
Where You Can Find More Information14
Incorporation of Certain Information by Reference15

ABOUT THIS PROSPECTUS

In this prospectus, all references to (i) “TapImmune” “we,” “us,” “our” or the “Company” mean TapImmune Inc.; (ii) “SEC” refers to the Securities and Exchange Commission; (iii) “Securities Act” refers to the United States Securities Act of 1933, as amended; (iv) “Exchange Act” refers to the United States Securities Exchange Act of 1934, as amended; and (v) all dollar amounts refer to United States dollars unless otherwise indicated.

You should rely only on the information we have provided or incorporated by reference into this prospectus, any applicable prospectus supplement and any related free writing prospectus. Weprospectus we have not authorized anyone to provide youfor use in connection with information different froma specific offering, and under similar headings in the other documents that contained inare incorporated by reference into this prospectus any applicable prospectus supplement or any related free writingas described on page 6 of this prospectus. No dealer, salesperson or other person is authorized to give any information or to represent anything not contained in

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
The date of this prospectus any applicable prospectus supplement or any related free writing prospectus. You must not rely on any unauthorized information or representation. is           , 2021.

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ABOUT THIS PROSPECTUS
This prospectus is an offer to sell only the common stock offered hereby, but only under circumstances and in jurisdictions where it is lawful to do so. You should assume that the information in this prospectus, any applicable prospectus supplement or any related free writing prospectus is accurate only as of the date on the front of the document and that any information we have incorporated by reference is accurate only as of the date of the document incorporated by reference, regardless of the time of delivery of this prospectus or any sale of a security.

The Selling Stockholders are offering the common stock only in jurisdictions where such issuances are permitted. The distribution of this prospectus and the issuance of the common stock in certain jurisdictions may be restricted by law. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the issuance of the common stock and the distribution of this prospectus outside the United States. This prospectus does not constitute, and may not be used in connection with, an offer to sell, or a solicitation of an offer to buy, the common stock offered by this prospectus by any person in any jurisdiction in which it is unlawful for such person to make such an offer or solicitation.

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and Exchange Commission, under whichor SEC, utilizing a “shelf” registration process. Under this shelf registration statement, we may sell any combination of the Selling Stockholders may offer from time to time up to an aggregate of 10,866,425 shares of our common stocksecurities described in this prospectus in one or more offerings. If required, eachofferings up to a total aggregate offering price of $300,000,000. This prospectus provides you with a general description of the securities we may offer.

Each time a Selling Stockholder offers common stock, in addition towe sell securities under this prospectus, we will provide you with a prospectus supplement that will contain specific information about the terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to that offering. We may also use athese offerings. The prospectus supplement and any related free writing prospectus that we may authorize to be provided to you may also add, update or change any of the information contained in this prospectus or in any documents that we have incorporated by reference. This prospectus, together with any applicable prospectus supplements, any related free writing prospectuses and the documents incorporated by reference into this prospectus, includes all material information relating to this offering. To the extent that any statement that we make in a prospectus supplement is inconsistent with statements made in this prospectus, the statements made in this prospectus will be deemed modified or superseded by those made in a prospectus supplement. Please carefully read both this prospectus and any prospectus supplement together with the additional information described below under “Where You Can Find More Information” and “Incorporation of Certain Information by Reference”.

Note Regarding Reverse Stock Splits

On February 18, 2014, we filed a Certificate of Change pursuant to NRS 78.209 with the Secretary of State of the State of Nevada to effect a reverse split of our common stock at a ratio of one for 100. On September 15, 2016, we filed another Certificate of Change pursuant to NRS 78.209 with the Secretary of State of the State of Nevada to effect a reverse split of our common stock at a ratio of one for 12. All historical share and per share amounts reflected in this prospectus have been adjusted to reflect the reverse stock splits.

FORWARD-LOOKING STATEMENTS

This prospectus contains forward-looking statements that involve risks and uncertainties. Any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may”, “will”, “should”, “expect”, “plan”, “intend”, “anticipate”, “believe”, “estimate”, “predict”, “potential” or “continue”, the negative of such terms or other comparable terminology. In evaluating these statements, you should consider various factors, including the assumptions, risks and uncertainties outlined in this prospectus. Any of these items may cause our actual results to differ materially from any forward-looking statement made in this prospectus. Forward-looking statements in this prospectus include, statements as to:

·the discovery, development, formulation, manufacturing and commercialization of our compounds, our drug candidates;

·conducting clinical trials internally, with collaborators, or with clinical research organizations;

·our collaboration and strategic relationship strategy; anticipated benefits and disadvantages of entering into such agreements;

·our licensing, investment and commercialization strategies;

·the regulatory approval process, including obtaining U.S. Food and Drug Administration and other international health authorities approval for our products in the United States and abroad;

·the safety, effectiveness and potential benefits and indications of our drug candidates and other compounds under development;

·the timing and size of our clinical trials; the compounds expected to enter clinical trials; timing of clinical trial results;

·our ability to manage expansion of our drug discovery and development operations;

·future required expertise relating to clinical trials, manufacturing, sales and marketing;

·obtaining and terminating licenses to products, drug candidates or technology, or other intellectual property rights;

·the receipt from or payments pursuant to collaboration or license agreements resulting from milestones or royalties;

·plans to develop and commercialize products on our own;

·plans to use third party manufacturers;

·expected expenses and expenditure levels; expected uses of cash;

·the adequacy of our capital resources to continue operations;

·the need to raise additional capital;

·our expectations regarding competition;

·our investments, including anticipated expenditures, losses and expenses;

·our patent prosecution and maintenance efforts; and

ii 

While these forward-looking statements, and any assumptions upon which they are based, are made in good faith and reflect our current judgment regarding future events, our actual results will likely vary, sometimes materially, from any estimates, predictions, projections, assumptions or other future performance suggested herein. Some of the risks and assumptions include:

·our ability to obtain additional capital when needed;

·fluctuations in net cash provided and used by operating, financing and investing activities;

·our limited operating history;

·our history of operating losses;

·our ability to discover, develop, formulate, manufacture and commercialize our drug candidates;

·the risk of unanticipated delays in, or discontinuations of, research and development efforts;

·the risk that previous preclinical testing or clinical trial results are not necessarily indicative of future clinical trial results;

·risks relating to the conduct of our clinical trials;

·changing regulatory requirements and administrative practice;

·the risk of adverse safety findings;

·the risk that results of our clinical trials do not support submission of a marketing approval application for our drug candidates;

·the risk of significant delays or costs in obtaining regulatory approvals;

·risks relating to our reliance on third party manufacturers, collaborators, and clinical research organizations;

·risks relating to the development of new products and their use by us and our current and potential collaborators;

·risks relating to our inability to control the development of out-licensed compounds or drug candidates;

·risks relating to our collaborators’ ability to develop and commercialize drug candidates;

·costs associated with prosecuting, maintaining, defending and enforcing patent claims and other intellectual property rights;

·our ability to maintain or obtain adequate product and clinical trial liability and other insurance coverage;

·the risk that our drug candidates may not obtain or maintain regulatory approval;

·the impact of technological advances and competition, including potential generic competition;

·our ability to compete against third parties with greater resources than ours;

iii 

·risks relating to changes in pricing and reimbursements in the markets in which we may compete;

·competition to develop and commercialize similar drug products;

·our ability to obtain and maintain patent protection and freedom to operate for our discoveries and to continue to be effective in expanding our patent coverage;

·the impact of changing laws on our patent portfolio;

·developments in and expenses relating to litigation;

·our ability to in-license drug candidates or other technology;

·fluctuations in net cash provided and used by operating, financing and investing activities;

·the competitive environment in which we operate;

·our dependence on key personnel;

·conflicts of interest of our directors and officers;

·our ability to fully implement our business plan;

·our ability to effectively manage our growth; and

·other regulatory, legislative and judicial developments.

Given these risks and uncertainties, you should not place undue reliance on these forward-looking statements. Except as required by federal securities laws, we undertake no obligation to update any forward-looking statements for any reason, even if new information becomes available or other events occur in the future.

iv 

PROSPECTUS SUMMARY

This summary highlights selected information appearing elsewhere in this prospectus or in documents incorporated herein by reference. This summary is not complete and does not contain all of the information that you should consider before making your investment decision. You should carefully read the entire prospectus, including the information set forth in the section entitled “Risk Factors” and the information that is incorporated by reference into this prospectus. SeeYou should read this prospectus, any applicable prospectus supplement and any related free writing prospectus, together with the sections entitled “Where You Can Find More Information” andinformation incorporated herein by reference as described under the heading “Incorporation of Certain Information by Reference” for a further discussion on incorporation by reference.

Company Overview

TapImmune Inc. (the “Company” or “we”), a Nevada corporation incorporatedReference,” before investing in 1992, is a biotechnology company focusing on immunotherapy specializing in the development of innovative peptide and gene-based immunotherapeutics and vaccines for the treatment of oncology and infectious disease. Unlike other vaccine technologies that narrowly address the initiation of an immune response, TapImmune's approach broadly stimulates the cellular immune system by enhancing the function of killer T-cells and T-helper cells and by restoring antigen presentation in tumor cells allowing their recognition and killing by the immune system.

Corporate Information

Our principal executive offices are located at 5 West Forsyth Street, Suite 200 Jacksonville, FL 32202 and our telephone number is 904-516-5436.

Common stock outstanding:10,271,696  shares as of September 18, 2017
Common stock offered by selling stockholders:10,866,425 shares
Common stock outstanding after the offering:16,730,107 shares (1)
Use of Proceeds:

We will not receive any proceeds from the sale of the common stock by the selling stockholders. We may receive proceeds, rounded to the nearest thousand dollars, if the following warrants are exercised:

$2,208,000 if the outstanding warrants issued in August 2014 are exercised,

$250,000 if the outstanding Series A Warrants are exercised,

$500,000 if the outstanding Series A-1 Warrants are exercised,

$1,882,000 if the outstanding Series C Warrants are exercised,

$3,928,000 if the outstanding Series D Warrants are exercised,

$3,750,000 if the outstanding Series D-1 Warrants are exercised,

$4,672,000 if the outstanding Series E Warrants are exercised,

$6,250,000 if the outstanding Series E-1 Warrants are exercised,

$3,264,000 if the outstanding Series F Warrants are exercised,

$3,000,000 if the outstanding Series F-1 Warrants are exercised,

$2,593,000 if the outstanding 2016 PIPE Warrants are exercised,

$314,000 if the outstanding 2016 Broker PIPE Warrants are exercised,

$5,969,000 if the outstanding 2017 PIPE Warrants are exercised, and

$597,000 if the outstanding 2017 Broker PIPE Warrants are exercised,

(to the extent the registration statement of which this prospectus is a part is then effective and, if applicable, the “cashless exercise” provision is not utilized by the holder). Any proceeds will be used for general corporate and working capital or for other purposes that the Board of Directors, in their good faith, deems to be in the best interest of the Company. No assurances can be given that any of such warrants will be exercised. See “Use of Proceeds.”

Listing of common stock:Our common stock is listed on the Nasdaq Capital Market under the symbol “TPIV.”
Dividend policy:We currently intend to retain any future earnings to fund the development and growth of our business. Therefore, we do not currently anticipate paying cash dividends on our common stock.
Risk factors:An investment in our company is highly speculative and involves a significant degree of risk. See “Risk Factors” and other information included in this prospectus for a discussion of factors you should carefully consider before deciding to invest in shares of our common stock.

(1)         Assumes the exercise of all of the outstanding warrants issued in August 2014 and all of the outstanding Seriessecurities offered.

THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE A Warrants, Series A-1 Warrants, Series C Warrants, Series D Warrants, Series D-1 Warrants, Series E Warrants, Series E-1 Warrants, Series F Warrants, Series F-1 Warrants, 2016 PIPE Warrants, 2016 Broker PIPE Warrants, 2017 PIPE Warrants and 2017 Broker PIPE Warrants, for which the underlying shares of common stock are registered herein, and thatSALE OF SECURITIES UNLESS IT IS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT.
Neither we, do not issuenor any agent, underwriter or dealer has authorized any person to give any information or to make any representation other shares of common stock. 


RISK FACTORS

 Investing in securities issued by us involves certain risks. Before you invest in any securities issued by us, in addition to the other information included in,than those contained or incorporated by reference into, this prospectus, you should carefully consider the risk factors contained in Part I, Item 1A under the caption “Risk Factors” and elsewhere in our 2016 Form 10-K, which is incorporated by reference into this prospectus, as updated by our annual or quarterly reports for subsequent fiscal years or fiscal quarters that we file with the SEC and that are so incorporated. See “Where You Can Find More Information” for information about how to obtain a copy of these documents. You should also carefully consider the risks and other information that may be contained in, or incorporated by reference into, any prospectus supplement relating to specific offerings of securities.

USE OF PROCEEDS

We will not receive any proceeds from the sale of shares by the selling stockholders. We may receive proceeds of up to approximately $39,177,000 if all of the outstanding warrants issued in August 2014 and all outstanding Series A Warrants, Series A-1 Warrants, Series C Warrants, Series D Warrants, Series D-1 Warrants, Series E Warrants, Series E-1 Warrants, Series F Warrants, Series F-1 Warrants, 2016 PIPE Warrants, 2016 Broker PIPE Warrants, 2017 PIPE Warrants and 2017 Broker PIPE Warrants for which the underlying shares of common stock are registered herein, are exercised (to the extent the registration statement of which this prospectus is a part is then effective and, if applicable, the “cashless exercise” provision is not utilized by the holder).  Any net proceeds we receive will be used for general corporate and working capital or other purposes that our Board of Directors deems to be in our best interest. As of the date of this prospectus, we cannot specify with certainty the particular uses for the net proceeds we may receive. Accordingly, we will retain broad discretion over the use of these proceeds, if any.

DETERMINATION OF OFFERING PRICE

The selling stockholders will offer common stock at the prevailing market prices or privately negotiated prices. The offering price of our common stock does not necessarily bear any relationship to our book value, assets, past operating results, financial condition or any other established criteria of value. Our common stock may not trade at market prices in excess of the offering price as prices for common stock in any public market will be determined in the marketplace and may be influenced by many factors, including the depth and liquidity.

SELLING STOCKHOLDERS

The shares of common stock being offered by the selling stockholders include those issuable to the selling stockholders upon the exercise of warrants as described in this prospectus. Upon the effectiveness of the registration statement of which this prospectus forms a part, the selling stockholders may offer the shares underlying those warrants for resale from time to time. Except as otherwise set out in this prospectus, the selling stockholders have not had any material relationship with us within the past three years.

The table below lists the selling stockholders and other information regarding the ownership of shares of common stockapplicable prospectus supplement or any related free writing prospectus prepared by each of the selling stockholders. The second column lists the number of shares of common stock owned by the selling stockholders as of September 18, 2017, assuming exercise of the warrants held by each such selling stockholder on that date and not taking account of any limitations on conversion and exercise set forth therein.

The third column lists the shares of common stock being offered by this Prospectus by the selling stockholders and does not take in account any limitations on exercise of the warrants set forth therein.

The fourth column assumes the sale of all of the shares offered by the selling stockholders pursuant to this Prospectus, but not the sale of any other shares held by the selling stockholders.

The terms of the Series A, Series D and Series E warrants provide that in no event shall shares of common stock be issued to any holder of those warrants to the extent such issuances of shares of common stock would result in such holder having ownership in excess of 4.9% of our outstanding shares of common stock. The terms of the warrants issued in August 2014, Series C and Series F warrants provide that in no event shall shares of common stock be issued to any holder of those warrants to the extent such issuances of shares of common stock would result in such holder having ownership in excess of 9.9% of our outstanding shares of common stock. The terms of the Series A-1, Series D-1, Series E-1 and Series F-1 warrants provide that in no event shall shares of common stock be issued to any holder of those warrants to the extent such issuances of shares of common stock would result in such holder having ownership in excess of 49.9% of our outstanding shares of common stock. The number of shares in the second column and the third column do not reflect these limitations. The selling stockholders may sell all, some or none of their shares in this offering. See “Plan of Distribution”.


Name of Selling Stockholder 

Number of
Shares of
Common
Stock
Beneficially

Owned
Prior to
Offering  

  Maximum
Number of
Shares of
Common
Stock to be
Sold
Pursuant to
this
Prospectus
(1)
  Number of
Shares of
Common
Stock
Beneficially
Owned
After
Offering (2)
  Percentage
of Shares of
Common
Stock
Beneficially
Owned
After the
Offering
(1) (2)
 
Empery Asset Master, LTD (3)  289,560   178,665   110,895   * 
Empery Tax Efficient, LP (4)  69,239   42,722   26,517   * 
Empery Tax Efficient II, LP (5)  581,201   358,614   222,587   1.33%
Iroquois Master Fund Ltd. (6)  702,500   520,833   181,667   1.09%
American Capital Management LLC (7)  421,500   312,500   109,000   * 
The Merav Abbe Irrevocable Trust (8)  140,500   104,166   36,334   * 
The Samantha Abbe Irrevocable Trust (9)  46,834   34,724   12,110   * 
The Talia Abbe Irrevocable Trust (10)  46,832   34,720   12,112   * 
The Bennett Abbe Irrevocable Trust (11)  46,832   34,720   12,112   * 
Brio Capital Master Fund, Ltd. (12)  1,177,576   808,337   369,239   2.21%
Eastern Capital Limited (13)  4,000,000   3,750,000   250,000   1.49%
OTA LLC (14)  157,233   157,233   0   0%
Kola Agbaje  111   111   0   0%
Allen Chase Foundation-Special Investment Account  4,168   4,168   0   0%
American Portfolios Financial Services Inc.  4,135   4,135   0   0%
Barclay Armitage  10,662   10,662   0   0%
Alexander Arrow  10,418   10,418   0   0%
Wayne K Baldwin  22,270   22,270   0   0%
Jeremy Berney  3,420   3,420   0   0%
Joseph Biancaniello  12,212   12,212   0   0%
Michael Bigger  41,516   41,516   0   0%
Michael Bigger Custodian FBO Andreas Bigger UGMA NY Until Age 21  41,516   41,516   0   0%
Michael Bigger Custodian FBO Mathias Bigger UGMA NY Until Age 21  41,516   41,516   0   0%
John C. Blazier  12,212   12,212   0   0%
Jay Bradbury  12,212   12,212   0   0%
Andrew Brenner  24,330   24,330   0   0%
Alexander J. Brown Trust dtd Apr 11 1996  50,000   50,000   0   0%
Larry Caillouet  12,212   12,212   0   0%
Scott Cardone  1,223   1,223   0   0%
O. Stuart Chase  4,168   4,168   0   0%
Chitayat Family Gift Trust  20,834   20,834   0   0%
Carol Cody  14,654   14,654   0   0%
Barry Cohn  2,068   2,068   0   0%
Lee Harrison Corbin  50,256   45,256   5,000   * 
John A. & Wendy M. Cotter  10,418   10,418   0   0%
Christopher Cozzolino  23,597   23,597   0   0%
Arielle Crothers  4,886   4,886   0   0%
Robert T. Crothers  30,010   30,010   0   0%
Robinson W. Crothers  3,334   3,334   0   0%
David M. Rickey Trust dtd 5/8/02  10,418   10,418   0   0%
Linda DelPonte  12,212   12,212   0   0%
Bruce Doniger  12,212   12,212   0   0%
Ernest Dronenburg  16,668   16,668   0   0%
Norman Dumbroff  24,422   24,422   0   0%
Eastside Holdings Ltd.  36,632   36,632   0   0%
EFD Capital Inc.  11,418   11,418   0   0%
Paul Ehrenstein  1,667   1,667   0   0%
Steven Elias & Bessie Elias, JTWROS  14,994   14,994   0   0%
Equity Investments L.P.  104,168   104,168   0   0%
Ernest W. Moody Revocable Trust  452,536   452,536   0   0%
Philip W. Faucette, II  22,630   22,630   0   0%
Kevin Filosa  1,806   1,806   0   0%
FirstFire Global Opportunities Fund LLC  52,084   52,084   0   0%
Albert & Hiedi Gentile  20,546   20,546   0   0%
Gibralt Capital Corporation  125,000   125,000   0   0%
Bruce D. & Laura K. Goethe  16,668   16,668   0   0%
Jessica Greenfield  12,212   12,212   0   0%
Ravi Gutta  31,748   31,748   0   0%
Kimberly Hanley  159   159   0   0%
Matthew Hayden & Julie Hayden, Tenants in Common  48,842   48,842   0   0%
Todd Harrigan  1,223   1,223   0   0%
Timothy Herrmann  1,223   1,223   0   0%
Daniel W. and Allaire Hummel, JTWROS  4,168   4,168   0   0%
Intracoastal Capital LLC  170,940   170,940   0   0%
Robert Jacob & Christine Jacob, JTWROS  7,328   7,328   0   0%
Morgan Janssen  14,597   14,597   0   0%
Peter K. Janssen  62,792   62,792   0   0%
JMG Holdings, LLC  48,842   48,842   0   0%
Martin Junge  56,168   56,168   0   0%
William Jeffrey Kadi  27,352   27,352   0   0%
Bobby Kato Jr.  5,210   5,210   0   0%
Justin Kenner D/B/A JMJ Financial  122,102   122,102   0   0%
Edward King  24,422   24,422   0   0%
Patricia King  12,212   12,212   0   0%
Mackie Klingbeil  10,418   10,418   0   0%
Peter M. Knapp  6,250   6,250   0   0%
Douglas Kohrs  48,842   48,842   0   0%
Ryan Konik  256   256   0   0%
Jeffrey Kuhr  5,862   5,862   0   0%
Thomas LaMarca  4,886   4,886   0   0%
David Landskowsky  5,658   5,658   0   0%
Brian K. Langham  10,418   10,418   0   0%
Clay Lebhar  10,418   10,418   0   0%
Thomas Leith  97,682   97,682   0   0%
Leonite Capital LLC  24,422   24,422   0   0%
Lincoln Park Capital Fund, LLC  73,262   73,262   0   0%
Allan Lipkowitz Revocable Living Trust dtd August 26, 2005  23,081   19,538   3,543   * 
Norman Liss  244,202   244,202   0   0%
Roman Livson  365   365   0   0%
Richard Madison  26,570   26,570   0   0%
Veronica Marano & Thomas M. Volckening  69,748   69,748   0   0%
Michael J. Mathieu  58,842   48,842   10,000   * 
Ernest J. & Michele M. Mattei  22,630   22,630   0   0%
Noel McGee  4,886   4,886   0   0%
Rory McGee  4,886   4,886   0   0%
Samantha McGrandy  104   104   0   0%
Robert McGrath  14,214   14,214   0   0%
Thomas McGurk  16,560   16,560   0   0%
Stephen R. Mut  41,668   41,668   0   0%
Thomas Norgiel  24,422   24,422   0   0%
Northlea Partners LLLP  6,250   6,250   0   0%
Nybor Group Inc.  4,168   4,168   0   0%
Terence Oi & Patricia Meehan, JTWROS  9,770   9,770   0   0%
OS Media SEZC Ltd.  25,000   25,000   0   0%
Osprey I LLC  20,834   20,834   0   0%
Pauline M. Howard Trust dtd 01.02.98, Candy D’Azevedo TTEE  14,654   14,654   0   0%
Lisa Piper  17,096   17,096   0   0%
Stephen Piscano  4,886   4,886   0   0%
Kenneth S. Pizzo, Jr.  208,334   208,334   0   0%
C. James Prieur & Karen Prieur, JTWROS  48,842   48,842   0   0%
Joel Pruzansky  34,840   34,840   0   0%
Harmon L. Remmel  27,897   24,422   3,475   * 
Stephen Renaud  39,430   39,430   0   0%
Jeff Rennell & Christine Kellye Rennell, JTWROS  44,738   44,738   0   0%
Richard A. Brown Revocable Trust u/t/d October 18, 2016  150,000   150,000   0   0%
Dyke Rogers  88,256   88,256   0   0%
Eric Rubenstein  5,658   5,658   0   0%
Art Sadin  10,418   10,418   0   0%
Giles Sandvik & Jeanne Sandvik, JTWROS  7,328   7,328   0   0%
James Saylor & Dorothy Saylor, JTWROS  14,654   14,654   0   0%
David M. Schloss  6,838   6,838   0   0%
Robert A. Schloss  4,886   4,886   0   0%
Joseph Schump  129,582   129,582   0   0%
Aaron Segal  1,223   1,223   0   0%
Stephen Shumpert  66,090   66,090   0   0%
Michael Silverman  58,548   58,548   0   0%
Daryl Squicciarini  48,842   48,842   0   0%
William C. Stone  24,422   24,422   0   0%
Spencer Stouffer  24,422   24,422   0   0%
Clayton A. Struve  57,756   57,756   0   0%
William Sykes  68,378   68,378   0   0%
Tim Elmes, LLC Pension Plan  12,212   12,212   0   0%
Lisa Torsiello  43,224   43,224   0   0%
The Trust of Abraham Schloss UAD 06/15/2011  17,096   17,096   0   0%
John V. Wagner, Jr.  29,966   29,966   0   0%
Jason and Amanda Willis, JTWROS  24,422   24,422   0   0%
Michael L. and Sharon D. Willis, JTWROS  97,682   97,682   0   0%
Julie Wineman  12,212   12,212   0   0%
WestPark Capital Inc.  111   111   0   0%
Jacob D. Wiznitzer  10,418   10,418   0   0%
The Steve and Kaye Yost Family Trust dtd 2.7.92  9,576   9,576   0   0%
Amir Zaghloul & Mona Zaghloul, JTWROS  27,352   27,352   0   0%
Thomas Zahavi  39,074   39,074   0   0%
Lynn Zheng  39,074   39,074   0   0%
Michael Zimmerman  8,220   8,220   0   0%


*           Less than 1%.

(1)         Includes shares of common stock underlying warrants held by the Selling Stockholder that are covered by this Prospectus, including warrants that, due to contractual restrictions, may not be exercisable if such exercise would result in beneficial ownership greater than 4.9%, 9.9% and 49.9% of our outstanding common stock, as applicable. As these ownership amounts are not calculated according to Rule 13d-3 under the Securities Exchange Act of 1934, as amended, they differ from the amounts shown in the section of this Prospectus entitled “Beneficial Ownership of Principal Stockholders, Officers and Directors”.

(2)         Based on 16,730,107 shares of common stock, which includes 10,271,696 shares of common stock issued and outstanding on September 18, 2017, and 6,458,411 shares of common stock being offered in this Prospectus that may be issued upon exercise of the warrants. In determining this amount, we assumed that (i) all 6,458,411 shares of common stock being offered in this Prospectus that may be issued upon exercise of the warrants will be sold and (ii) we issue no other shares of common stock. If these assumptions are incorrect, the number of shares and percentages included in this column will differ from what we have provided.

(3)         Empery Asset Management LP, the authorized agent of Empery Asset Master Ltd (“EAM”), has discretionary authority to vote and dispose of the shares held by EAM and may be deemed to be the beneficial owner of these shares. Martin Hoe and Ryan Lane, in their capacity as investment managers of Empery Asset Management LP, may also be deemed to have investment discretion and voting power over the shares held by EAM. EAM, Mr. Hoe and Mr. Lane each disclaim any beneficial ownership of these shares.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 335,898 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate. The warrants referred to in the immediately preceding paragraph are comprised of (i) 59,555 shares of common stock issuable upon exercise of the Series D Warrants, (ii) 59,555 shares of common stock issuable upon exercise of the Series E Warrants and (iii) 59,555 shares of common stock issuable upon exercise of the Series F Warrants.


(4)         Empery Asset Management LP, the authorized agent of Empery Tax Efficient, LP (“ETE”), has discretionary authority to vote and dispose of the shares held by ETE and may be deemed to be the beneficial owner of these shares. Martin Hoe and Ryan Lane, in their capacity as investment managers of Empery Asset Management LP, may also be deemed to have investment discretion and voting power over the shares held by ETE. ETE, Mr. Hoe and Mr. Lane each disclaim any beneficial ownership of these shares.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 42,722 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 14,241 shares of common stock issuable upon exercise of the Series D Warrants, (ii) 14,241 shares of common stock issuable upon exercise of the Series E Warrants and (iii) 14,241 shares of common stock issuable upon exercise of the Series F Warrants.

(5)         Empery Asset Management LP, the authorized agent of Empery Tax Efficient, LP (“ETE II”), has discretionary authority to vote and dispose of the shares held by ETE II and may be deemed to be the beneficial owner of these shares. Martin Hoe and Ryan Lane, in their capacity as investment managers of Empery Asset Management LP, may also be deemed to have investment discretion and voting power over the shares held by ETE II. ETE II, Mr. Hoe and Mr. Lane each disclaim any beneficial ownership of these shares.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 358,614 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 119,538 shares of common stock issuable upon exercise of the Series D Warrants, (ii) 119,538 shares of common stock issuable upon exercise of the Series E Warrants and (iii) 119,538 shares of common stock issuable upon exercise of the Series F Warrants.

(6)         Iroquois Capital Management L.L.C. (“Iroquois Capital”) is the investment manager of Iroquois Master Fund Ltd. (“Iroquois Master Fund”) and consequently has voting control and investment discretion over securities held by Iroquois Master Fund. Each of Joshua Silverman and Richard Abbe may be deemed to have voting control and investment discretion over securities held by Iroquois Master Fund. As a result of the foregoing, each of Iroquois Capital, Mr. Silverman and Mr. Abbe may be deemed to have beneficial ownership (as determined under Section 13(d) of the Securities Exchange Act of 1934, as amended) of the securities being registered hereunder.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 468,356 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 104,167 shares of common stock issuable upon exercise of the Series A Warrants, (ii) 110,000 shares of common stock issuable upon exercise of the Series C Warrants, (iii) 104,167 shares of common stock issuable upon exercise of the Series D Warrants, (iv) 51,690 shares of common stock issuable upon exercise of the Series E Warrants and (v) 98,334 shares of common stock issuable upon exercise of the Series F Warrants.

(7)         Kimberly Page has the authority and responsibility for the investments made on behalf of American Capital Management LLC (“ACM”) and accordingly, has voting and dispositive power over the securities held by ACM.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 302,004 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 62,500 shares of common stock issuable upon exercise of the Series A Warrants, (ii) 66,000 shares of common stock issuable upon exercise of the Series C Warrants, (iii) 62,500 shares of common stock issuable upon exercise of the Series D Warrants, (iii) 52,004 shares of common stock issuable upon exercise of the Series E Warrants and (iv) 59,000 shares of common stock issuable upon exercise of the Series F Warrants.

(8)         By virtue of his position as trustee, Leo Abbe has voting and dispositive power over the securities held by The Merav Abbe Irrevocable Trust.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 93,670 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 20,833 shares of common stock issuable upon exercise of the Series A Warrants, (ii) 22,000 shares of common stock issuable upon exercise of the Series C Warrants, (iii) 20,833 shares of common stock issuable upon exercise of the Series D Warrants, (iv) 10,337 shares of common stock issuable upon exercise of the Series E Warrants and (v) 19,667 shares of common stock issuable upon exercise of the Series F Warrants.

(9)         By virtue of his position as trustee, Richard Abbe has voting and dispositive power over the securities held by The Samantha Abbe Irrevocable Trust.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 31,226 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 6,945 shares of common stock issuable upon exercise of the Series A Warrants, (ii) 7,333 shares of common stock issuable upon exercise of the Series C Warrants, (iii) 6,945 shares of common stock issuable upon exercise of the Series D Warrants, (iv) 3,447 shares of common stock issuable upon exercise of the Series E Warrants and (v) 6,556 shares of common stock issuable upon exercise of the Series F Warrants.

(10)        By virtue of his position as trustee, Richard Abbe has voting and dispositive power over the securities held by The Talia Abbe Irrevocable Trust.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 31,222 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 6,944 shares of common stock issuable upon exercise of the Series A Warrants, (ii) 7,333 shares of common stock issuable upon exercise of the Series C Warrants, (iii) 6,944 shares of common stock issuable upon exercise of the Series D Warrants, (iv) 3,446 shares of common stock issuable upon exercise of the Series E Warrants and (v) 6,555 shares of common stock issuable upon exercise of the Series F Warrants.


(11)        By virtue of his position as trustee, Richard Abbe has voting and dispositive power over the securities held by The Bennett Abbe Irrevocable Trust.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 31,222 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 6,944 shares of common stock issuable upon exercise of the Series A Warrants, (ii) 7,333 shares of common stock issuable upon exercise of the Series C Warrants, (iii) 6,944 shares of common stock issuable upon exercise of the Series D Warrants, (iv) 3,446 shares of common stock issuable upon exercise of the Series E Warrants and (v) 6,555 shares of common stock issuable upon exercise of the Series F Warrants.

(12)        Shaye Hirsch has voting and dispositive power over the securities owned by the selling stockholder.

The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 724,374 shares issuable upon the exercise of warrants held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

The warrants referred to in the immediately preceding paragraph are comprised of (i) 198,334 shares of common stock issuable upon exercise of the Series C Warrants, (ii) 208,334 shares of common stock issuable upon exercise of the Series D Warrants, (iii) 124,371 shares of common stock issuable upon exercise of the Series E Warrants and (iv) 193,334 shares of common stock issuable upon exercise of the Series F Warrants.

(13)        Eastern Capital Limited is a direct wholly-owned subsidiary of Portfolio Services Ltd. Kenneth B. Dart is the beneficial owner of all of the outstanding shares of Portfolio Services Ltd. Eastern Capital Limited, Portfolio Services Ltd. and Mr. Dart have shared voting and dispositive powers with respect to the shares of common stock referenced above.”

“Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 1,666,667 shares issuable upon the exercise of the warrants set forth below that are held by the stockholder. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.

“Shares of Common Stock to be Sold Pursuant to this Prospectus” includes (i) 416,667 shares of common stock issuable upon exercise of the Series A-1 Warrants, (ii) 416,667 shares of common stock issuable upon exercise of the Series D-1 Warrants (iii) 416,667 shares of common stock issuable upon exercise of the Series E-1 Warrants and (iv) 416,667 shares of common stock issuable upon exercise of the Series F-1 Warrants.

(14)        OTA LLC (“OTA”) is a broker-dealer registered with the Securities and Exchange Commission and a member of the Financial Industry Regulatory Authority. Ira M. Leventhal, as a senior managing director of OTA, has voting and investment control over the reported securities. The shares listed under “Number of Shares of Common Stock Owned Prior to Offering” and “Shares of Common Stock to be Sold Pursuant to this Prospectus” include 157,233 shares of common stock issuable upon exercise of the warrants sold in August 2014. This amount does not (i) give effect to limitations on ownership set out in any of the warrants that may be exercised into such shares or (ii) include any shares that may be beneficially owned by an affiliate.


PLAN OF DISTRIBUTION

The common stock held by the selling stockholders may be sold or distributed from time to time by the selling stockholders directly to one or more purchasers or through brokers, dealers, or underwriters who may act solely as agents at market prices prevailing at the time of sale, at prices related to the prevailing market prices, at negotiated prices, or at fixed prices, which may be changed on any stock exchange, market or trading facility on which the shares are traded or in private transactions. The sale of the selling stockholders’ common stock offered by this prospectus may be effected in one or more of the following methods:

·ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers;

·transactions involving cross or block trades;

·purchases by a broker-dealer as principal and resale by the broker-dealer for its account;

·an exchange distribution in accordance with the rules of the applicable exchange;

·in privately negotiated transactions;

·short sales after the registration statement, of which this prospectus forms a part, becomes effective;

·broker-dealers may agree with the selling stockholders to sell a specified number of such shares at a stipulated price per share;

·“at the market” into an existing market for the common stock;

·through the writing of options on the shares;

·a combination of any such methods of sale; and

·any other method permitted pursuant to applicable law.

In order to comply with the securities laws of certain states, if applicable, the shares of each of the selling stockholders may be sold only through registered or licensed brokers or dealers. In addition, in certain states, such shares may not be sold unless they have been registered or qualified for sale in the state or an exemption from the registration or qualification requirement is available and complied with.

The selling stockholders may also sell shares of common stock under Rule 144 promulgated under the Securities Act, if available, or any other exemption available under the Securities Act rather than under this prospectus. In addition, the selling stockholders may transfer the shares of common stock by other means not described in this prospectus.

The selling stockholders may also sell the shares directly to market makers acting as principals and/or broker-dealers acting as agents for themselves or their customers. Such broker-dealers may receive compensation in the form of discounts, concessions or commissions from the selling stockholders and/or the purchasers of shares for whom such broker-dealers may act as agentsus or to whom they sell as principal or both, which compensation as to a particular broker-dealer might be in excess of customary commissions. Market makers and block purchasers purchasing the shares will do so for their own account and at their own risk. It is possible that a selling stockholder will attempt to sell shares of common stock in block transactions to market makers or other purchasers at a price per share which may be below the then market price. The selling stockholders cannot assure that all orwe have referred you. This prospectus, any of the shares offered in this prospectus will be issued to, or sold by, such selling stockholder.

Brokers, dealers, underwriters, or agents participating in the distribution of the shares held by the selling stockholders as agents may receive compensation in the form of commissions, discounts, or concessions from the selling stockholders and/or purchasers of the common stock for whom the broker-dealers may act as agent. The selling stockholders may agree to indemnify any agent, dealer or broker-dealer that participates in transactions involving sales of the shares if liabilities are imposed on that person under the Securities Act.


Each of the selling stockholders acquired the securities offered hereby in the ordinary course of business and has advised us that they have not entered into any agreements, understandings or arrangements with any underwriters or broker-dealers regarding the sale of their shares of common stock, nor is there an underwriter or coordinating broker acting in connection with a proposed sale of shares of common stock by any selling stockholder. If we are notified by any selling stockholder that any material arrangement has been entered into with a broker-dealer for the sale of shares of common stock, if required, we will file aapplicable supplement to this prospectus.

We may suspend the sale of shares by the selling stockholders pursuant to this prospectus for certain periods of time for certain reasons, including if the prospectus is required to be supplemented or amended to include additional material information.

If any of the selling stockholders use this prospectus for any sale of the shares of common stock, such selling stockholder will be subject to the prospectus delivery requirements of the Securities Act.

Regulation M

The anti-manipulation rules of Regulation M under the Exchange Act of 1934, as amended (the “Exchange Act”) may apply to sales of our common stock and activities of the selling stockholder.

We have advised the selling stockholders that while it is engaged in a distribution of the shares included in this prospectus it is required to comply with Regulation M promulgated under the Exchange Act. With certain exceptions, Regulation M precludes the selling stockholder, any affiliated purchasers, and any broker-dealer or other person who participates in the distribution from bidding for or purchasing, or attempting to induce any person to bid for or purchase any security which is the subject of the distribution until the entire distribution is complete. Regulation M also prohibits any bids or purchases made in order to stabilize the price of a security in connection with the distribution of that security. All of the foregoing may affect the marketability of the shares offered hereby this prospectus.


DESCRIPTION OF SECURITIES

General

As of the date hereof, we are authorized by our articles of incorporation to issue an aggregate of 41,666,667 shares of common stock, par value $0.001 per share, and 5,000,000 shares of preferred stock, par value $0.001 per share. As of September 18, 2017, we had 10,271,696 shares of common stock, and no shares of preferred stock, issued and outstanding, as well as warrants and stock options outstanding to purchase an aggregate of 6,975,407 shares of our common stock at prices ranging between $1.20 and $220.00 per share, as follows:

Outstanding Warrants  Exercise Price  Expiration
Series A  214,433  $1.20  01/13/2020
Series C  110,683  $6.00  01/13/2020
Series C  313,750  $4.00  01/13/2020
Series D  297,500  $9.00  Between 07/16/2020 and 08/13/2020 and 08/19/2020 and 09/09/2020
Series D  312,500  $4.00  Between 07/16/2020 and 08/13/2020 and 08/19/2020 and 09/09/2020
Series E  261,619  $15.00  Between 10/01/2020 and 11/12/2020 and 11/30/2020 and 12/09/2020
Series E  186,555  $4.50  Between 10/01/2020 and 11/12/2020 and 11/30/2020 and 12/09/2020
Series F  290,833  $7.20  08/11/2021
Series F  292,500  $4.00  08/11/2021
Series A-1  418,750  $1.20  03/09/2020
Series C-1  2,083  $6.00  01/13/2020
Series D-1  416,667  $9.00  Between 08/19/2020 and 09/09/2020
Series E-1  418,750  $15.00  06/16/2020
Series F-1  416,667  $7.20  08/11/2021
2016 PIPE Investor Warrants  653,187  $3.97  08/11/2021
2016 PIPE Broker Warrants  65,327  $4.80  08/11/2021
Various  3,869  $1.20  Various
Various  16,667  $10.00-$14.00  Various
Warrants issued in August 2014  157,233  $14.04  08/14/19
Various  16,195  $14.01-$16.00  Various
Various  833  $120.00  12/18/2017
2017 PIPE  Investor Warrants  1,503,567  $3.97  06/26/2022
2017 PIPE Broker Warrants  150,356  $3.97  06/26/2022

Outstanding Stock OptionsExercise PriceExpiration
Various62,916$1.50-$4.00various
Various141,667$4.00-$7.00various
Various248,333$7.00-$8.00various
Various1,967$120.00-$220.00various


The following summary of the terms of our common stock and preferred stock, respectively, may not be complete and is subject to, and qualified in its entirety by reference to, the terms and provisions of our amended and restated certificate of incorporation and our amended and restated bylaws. You should refer to, and read this summary together with, our amended and restated certificate of incorporation and amended and restated bylaws to review all of the terms of our common stock and preferred stock, respectively, that may be important to you.

Preferred Stock

We are authorized, subject to limitations prescribed by Nevada law, to issue preferred stock in one or more series, to establish from time to time the number of shares to be included in each series and to fix the designation, powers, preferences and rights of the shares of each series and any of its qualifications, limitations or restrictions. Our board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of the common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring or preventing a change in control of our Company and may adversely affect the market price of our common stock and the voting and other rights of the holders of our common stock. We have no current plan to issue any shares of preferred stock.

Common Stock

Voting Rights

Holders of our common stock are entitled to one vote for each share held of record on each matter submitted to a vote of stockholders. Except as otherwise required by Nevada law, and subject to the rights of the holders of outstanding preferred stock, if any, all stockholder action is taken by the vote of a majority of the outstanding shares of common stock voting as a single class present at a meeting of stockholders at which a quorum consisting of one-third of the outstanding shares of common stock is present in person or proxy. Directors are elected by plurality vote, and stockholders do not have the ability to cumulate votes for the election of directors.

Dividend Rights

Subject to the prior rights of any class or series of preferred stock which may from time to time be outstanding, if any, holders of our common stock are entitled to receive ratably, dividends when, as, and if declared by our board of directors out of funds legally available for that purpose and, upon our liquidation, dissolution, or winding up, are entitled to share ratably in all assets remaining after payment of liabilities and payment of accrued dividends and liquidation preferences on any outstanding preferred stock.

No Preemptive or Similar Rights

Our common stock is not entitled to preemptive rights and is not subject to conversion, redemption or sinking fund provisions.

Anti-Takeover Provisions

Provisions of the Nevada Corporation Law and our articles of incorporation and bylaws could make it more difficult to acquire our company by means of a tender offer, a proxy contest or otherwise, or to remove incumbent officers and directors. These provisions, summarized below, would be expected to discourage certain types of takeover practices and takeover bids our Board may consider inadequate and to encourage persons seeking to acquire control of our Company to first negotiate with us. We believe that the benefits of increased protection of our ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure our Company will outweigh the disadvantages of discouraging takeover or acquisition proposals because, among other things, negotiation of these proposals could result in an improvement of their terms.


Authorized but Unissued Shares

Our authorized but unissued shares of common stock and preferred stock will be available for future issuance without stockholder approval, except as may be required under the listing rules of any stock exchange on which our common stock is then listed. We may use additional shares for a variety of corporate purposes, including future public offerings to raise additional capital, corporate acquisitions and employee benefit plans. The existence of authorized but unissued shares of common stock and preferred stock could render more difficult or discourage an attempt to obtain control of us by means of a proxy contest, tender offer, merger or otherwise.

Blank Check Preferred Stock

Our articles of incorporation permit our Board to issue preferred stock with voting, conversion and exchange rights that could negatively affect the voting power or other rights of our common stockholders. The issuance of our preferred stock could delay or prevent a change of control of our Company.

Board Vacancies may be Filled by Remaining Directors

Our bylaws provide that vacancies on the Board may be filled by the remaining directors then in office.

Amendments to our Articles of Incorporation and Bylaws

Under the Nevada Corporation Law, our articles of incorporation may not be amended by stockholder action alone. Amendments to our articles of incorporation require a board resolution approved by the majority of the outstanding capital stock entitled to vote. Our bylaws may only be amended by a majority vote of the stockholders at any annual meeting or special meeting called for that purpose. Subject to the right of stockholders as described in the immediately preceding sentence, the Board has the power to make, adopt, alter, amend and repeal, from time to time, our bylaws.

Requirements for Notice of Stockholder Director Nominations and Stockholder Business at Meetings.

Under our bylaws, nominations of persons to stand for election as a director may be made by the Board of Directors or by any stockholder entitled to vote for the election of directors who complies with the applicable notice requirements set out therein. If a stockholder wishes to nominate someone to stand for election as a director, or bring any business before an annual or special meeting, the stockholder must comply with certain procedures set out in our bylaws. These provisions specify the timing for delivery of the stockholder’s notice of such business and the information that such notice must contain. The information that may be required in a stockholder notice includes general information regarding the stockholder, a description of the proposed business, and, with respect to nominations for the Board of Directors, certain specified information regarding the nominee(s). In addition to the information required in a stockholder notice described above, our bylaws require under certain circumstances a representation that the stockholder is a holder of our voting stock and intends to appear in person or by proxy at the meeting to make the nomination or bring up the matter specified in the notice. For the timing of the stockholder notice, our bylaws require that the notice must be received by our secretary:

·in the case of any annual meeting, 120 days prior to the anniversary date of the immediately preceding annual meeting of stockholders; provided, however, that in the event that the annual meeting is called for a date that is not within 30 days before or 60 days after such anniversary date, notice by the stockholder in order to be timely must be so received no later than the close of business on the tenth day following the day on which notice of the date of the annual meeting was mailed or public disclosure of the date of the annual meeting was made, whichever first occurs; and

·in the case of a special meeting of stockholders called for the purpose of electing directors, not later than the close of business on the tenth day following the day on which notice of the date of the special meeting was mailed or public disclosure of the date of the special meeting was made, whichever first occurs.


Nevada Law

Nevada law contains a provision governing “acquisition of controlling interest.” This law provides generally that any person or entity that acquires 20% or more of the outstanding voting shares of a publicly-held Nevada corporation in the secondary public or private market may be denied voting rights with respect to the acquired shares, unless a majority of the disinterested stockholders of the corporation elects to restore such voting rights in whole or in part. The control share acquisition act provides that a person or entity acquires “control shares” whenever it acquires shares that, but for the operation of the control share acquisition act, would bring its voting power within any of the following three ranges: 20 to 33-1/3%; 33-1/3 to 50%; or more than 50%.

A “control share acquisition” is generally defined as the direct or indirect acquisition of either ownership or voting power associated with issued and outstanding control shares. The stockholders or Board of Directors of a corporation may elect to exempt the stock of the corporation from the provisions of the control share acquisition act through adoption of a provision to that effect in the articles of incorporation or bylaws of the corporation. Our articles of incorporation and bylaws do not exempt our common stock from the control share acquisition act.

The control share acquisition act is applicable only to shares of “Issuing Corporations” as defined by the Nevada law. An Issuing Corporation is a Nevada corporation which (i) has 200 or more stockholders, with at least 100 of such stockholders being both stockholders of record and residents of Nevada, and (ii) does business in Nevada directly or through an affiliated corporation.

At this time, we do not believe we have 100 stockholders of record resident in Nevada and we do not conduct business in Nevada directly. Therefore, the provisions of the control share acquisition act are believed not to apply to acquisitions of our shares and will not until such time as these requirements have been met. At such time as they may apply, the provisions of the control share acquisition act may discourage companies or persons interested in acquiring a significant interest in or control of our Company, regardless of whether such acquisition may be in the interest of our stockholders.

The Nevada “Combination with Interested Stockholders Statute” may also have an effect of delaying or making it more difficult to effect a change in control of our Company. This statute prevents an “interested stockholder” and a resident domestic Nevada corporation from entering into a “combination,” unless certain conditions are met. The statute defines “combination” to include any merger or consolidation with an “interested stockholder,” or any sale, lease, exchange, mortgage, pledge, transfer or other disposition, in one transaction or a series of transactions with an “interested stockholder” having (i) an aggregate market value equal to 5% or more of the aggregate market value of the assets of the corporation, (ii) an aggregate market value equal to 5% or more of the aggregate market value of all outstanding shares of the corporation, or (iii) representing 10% or more of the earning power or net income of the corporation.

An “interested stockholder” means the beneficial owner of 10% or more of the voting shares of a resident domestic corporation, or an affiliate or associate thereof. A corporation affected by the statute may not engage in a “combination” within three years after the interested stockholder acquires its shares unless the combination or purchase is approved by the Board of Directors before the interested stockholder acquired such shares. If approval is not obtained, then after the expiration of the three-year period, the business combination may be consummated with the approval of the Board of Directors or a majority of the voting power held by disinterested stockholders, or if the consideration to be paid by the interested stockholder is at least equal to the highest of (i) the highest price per share paid by the interested stockholder within the three years immediately preceding the date of the announcement of the combination or in the transaction in which he became an interested stockholder, whichever is higher, (ii) the market value per common share on the date of announcement of the combination or the date the interested stockholder acquired the shares, whichever is higher, or (iii) if higher for the holders of preferred stock, the highest liquidation value of the preferred stock.

Nevada Law also includes express provisions preserving the right of a corporation to adopt or sign “plans, arrangements or instruments that grant or deny rights, privileges, power or authority to a holder or holders of a specified number of shares or percentage of share ownership or voting power.” A common example is where the board issues the right for certain stockholders to purchase shares of the corporation at a substantially discounted price if one stockholder reaches a specified percentage of share ownership. The purchase of discounted shares dilutes the share ownership of such potential acquirer.


Registration Rights

Holders of approximately 4,408,014 shares of our outstanding common stock, and of warrants to purchase approximately 6,458,411 shares of our common stock, are entitled to certain rights with respect to registration of such outstanding shares, and the shares of common stock underlying such warrants, under the Securities Act. These shares are referred to as registrable securities. The holders of these registrable securities possess registration rights pursuant to the terms of various purchase agreements and registration rights agreements entered into with us in connection with our sale of such stock and warrants to such investors. This registration statement covers all of such securities. We are required to pay all expenses incurred in connection with such registration.

The registration rights described above will terminate as to any stockholder at such time as all of such stockholder’s securities (together with any affiliate of the stockholder with whom such stockholder must aggregate its sales) could be sold without compliance with the registration requirements of the Securities Act pursuant to Rule 144.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Island Stock Transfer, 1550 Roosevelt Blvd Suite 301, Clearwater, Florida 33760.

Listing

Our shares of common stock are listed for trading on the Nasdaq Capital Market under the symbol TPIV. On September 18, 2017, the last reported sale price per share for our common stock on the Nasdaq Capital Market was $3.07.

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EXPERTS

Our consolidated financial statements as of December 31, 2016 and December 31, 2015, and for the years then ended, have been incorporated by reference in the prospectus in reliance upon the report of Marcum LLP, independent registered public accounting firm, and upon the authority of said firm as experts in accounting and auditing.

LEGAL MATTERS

The firm of Shumaker, Loop & Kendrick, LLP has issued an opinion regarding the legality and validity of the securities offered under this prospectus.

DISCLOSURE OF COMMISSION POSITION ON INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

Our by-laws require us to indemnify any of our officers or directors, and certain other persons, under certain circumstances against all expenses and liabilities incurred or suffered by such persons because of a lawsuit or similar proceeding to which the person is made a party by reason of a his being a director or officer of TapImmune or our subsidiaries, unless that indemnification is prohibited by law. We may also purchase and maintain insurance for the benefit of any officer which may cover claims for which we could not indemnify a director or officer. We have been advised that in the opinion of the Securities and Exchange Commission, indemnification of our officers, directors and controlling persons under these provisions, or otherwise, is against public policy and is unenforceable.

Insofar as indemnification for liabilities arising under the Securities Act of 1933, as amended (the “Securities Act”), may be permitted to directors, officers or persons controlling us pursuant to the foregoing provisions, or otherwise, we have been advised that in the opinion of the Securities and Exchange Commission, such indemnification is against public policy as expressed in the Securities Act, and is therefore unenforceable.

WHERE YOU CAN FIND MORE INFORMATION

We are a reporting company and file annual, quarterly and current reports, proxy statements and other information with the SEC. We have filed with the SEC registration statements on Forms S-1 and Form S-3 under the Securities Act with respect to the securities we are offering under this prospectus (Commission File Nos. 333-196115, 333-205757, 333-215258 and 333-[]). This prospectus does not contain all of the information set forth in the registration statements and the exhibits to the registration statements. For further information with respect to us and the securities we are offering under this prospectus, we refer you to the registration statements and the exhibits and schedules filed as a part of the registration statements. You may read and copy the registration statements, as well as our reports, proxy statements and other information, at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. You can request copies of these documents by writing to the SEC and paying a fee for the copying cost. Please call the SEC at 1-800-SEC-0330 for more information about the operation of the Public Reference Room. The SEC maintains an internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, where our SEC filings are also available. The address of the SEC’s web site is http://www.sec.gov.

We maintain a website at www.tapimmune.com. The information contained in, or that can be accessed through, our website is not incorporated by reference herein and is not part of this prospectus.

Statements contained in this prospectus as to the contents of any contract or other document are not necessarily complete, and in each instance we refer you to the copy of the contract or document filed as an exhibit to the registration statement, each such statement being qualified in all respects by such reference.

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The documents incorporated by reference into this prospectus contain important information that you should read about us.

The following documents are incorporated by reference into this prospectus:

·     Our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed on March 14, 2017;

·     Our Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2017 and June 30, 2017, filed on May 5, 2017 and August 7, 2017, respectively;

·     Our Current Reports on Form 8-K filed on April 28, 2017, June 22, 2017, June 26, 2017, July 11, 2017 and September 5, 2017;

·     Our Definitive Proxy Statement on Schedule 14A, filed on July 12, 2017; and

·     The description of our common stock contained in its registration statement on Form 8-A (Registration No. 001-37939), filed on November 3, 2016, including any amendments or reports filed for the purpose of updating such description.

We also incorporate by reference any future filings (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits filed on such form that are related to such items unless such Form 8-K expressly provides to the contrary) made with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including those made after the date of the initial filing of the registration statement of which this prospectus forms a part and prior to effectiveness of such registration statement, until we file a post-effective amendment that indicates the termination of the offering of the common stock made by this prospectus and such future filings will become a part of this prospectus from the respective dates that such documents are filed with the SEC. Our SEC file number is 001-37939. Any statement contained herein or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes hereof or of the related prospectus supplement to the extent that a statement contained herein or in any other subsequently filed document which is also incorporated or deemed to be incorporated herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

We will furnish without charge to each person to whom this prospectus is delivered, upon written or oral request, a copy of any document incorporated by reference. Requests should be addressed to Corporate Secretary, 5 West Forsyth Street, Suite 200 Jacksonville, FL 32202, or may be made telephonically at (904) 516-5436.

You should rely only on the information incorporated by reference or provided in this prospectus or any related free writing prospectus supplement. We havedo not authorized anyoneconstitute an offer to provide you with different information. sell or the solicitation of an offer to buy any securities other than the registered securities to which they relate, nor do this prospectus, any applicable supplement to this prospectus or any related free writing prospectus constitute an offer to sell or the solicitation of an offer to buy securities in any jurisdiction to any person to whom it is unlawful to make such offer or solicitation in such jurisdiction.

You should not assume that the information contained in this prospectus, or the accompanyingany applicable prospectus supplement or any related free writing prospectus is accurate on any date subsequent to the date set forth on the front of the document or that any information we have incorporated by reference is correct on any date subsequent to the date of the document incorporated by reference, even though this prospectus, and any accompanyingapplicable prospectus supplement or any related free writing prospectus is delivered, or securities are sold, on a later date.

This prospectus and the information incorporated herein by reference contain summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been filed, will be filed or will be incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described below under the heading “Where You Can Find More Information.”

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TABLE OF CONTENTS

SUMMARY
This summary highlights selected information from this prospectus and does not contain all of the information that you need to consider in making your investment decision. You should carefully read the entire prospectus, the applicable prospectus supplement and any related free writing prospectus, including the risks of investing in our securities discussed under the heading “Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus. You should also carefully read the information incorporated by reference into this prospectus, including our financial statements and related notes, and the exhibits to the registration statement of which this prospectus is a part, before making your investment decision.
Unless the context indicates otherwise, as used in this prospectus, references to “we,” “us,” “our,” “the company” and “Marker Therapeutics” refer to Marker Therapeutics, Inc., formerly known as TapImmune, Inc., and its subsidiaries. We own various U.S. federal trademark applications and unregistered trademarks, including our company name. All other trademarks or trade names referred to in this prospectus are the property of their respective owners. Solely for convenience, the trademarks and trade names in this prospectus are referred to without the symbols ® and ™, but such references should not be construed as any indication that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto.
Company Overview
Overview
We are a clinical-stage immuno-oncology company specializing in the development and commercialization of novel T cell-based immunotherapies and innovative peptide-based vaccines for the treatment of hematological malignancies and solid tumor indications. We developed our lead product candidates from our MultiTAA-specific T cell technology, which is based on the selective expansion of non-engineered, tumor-specific T cells that recognize tumor associated antigens, or TAAs, which are tumor targets, and then kill tumor cells expressing those targets. These T cells are designed to recognize multiple tumor targets to produce broad spectrum anti-tumor activity. We are advancing two pipelines of product candidates as part of our MultiTAA-specific T cell program: the autologous T cells for the treatment of lymphoma, multiple myeloma, or MM, and selected solid tumors and the allogeneic T cells for the treatment of acute myeloid leukemia, or AML, and acute lymphoblastic leukemia, or ALL. Because we do not genetically engineer the MultiTAA-specific T cell therapies, we believe that our product candidates are easier and less expensive to manufacture, have lower toxicities than current engineered chimeric antigen receptor, or CAR-T, and T cell receptor-based therapies and may provide patients with meaningful clinical benefit. We are also developing innovative peptide-based immunotherapeutic vaccines for the treatment of metastatic solid tumors.
We are pursuing post-transplant AML as the lead indication for our first company-sponsored
MultiTAA-specific T cell program. In April 2020, the U.S. Food and Drug Administration granted orphan drug designation to MT-401 for the treatment of AML after receiving an allogeneic stem cell transplant. The MultiTAA-specific T cell therapy has been well tolerated in an ongoing Phase 1 clinical trial in AML and myelodysplastic syndrome, or MDS, conducted by our strategic partner Baylor College of Medicine, or BCM. As reported in a recent publication by Lulla et al., 11 of the 17 patients in the adjuvant disease setting dosed with the MultiTAA-specific T cell therapy after receiving an allogeneic hematopoietic stem cell transplant, or HSCT, never relapsed [median leukemia-free survival, or LFS, not reached at a median follow-up of 1.9 years], with 11 of 15 patients remaining alive (estimated two-year overall survival of 77%) at a median follow-up of 1.9 years post-infusion, which compares favorably with HSCT outcomes for risk-matched AML/MDS patients post-HSCT [median LFS of nine to 15 months and two-year survival probability of 42%]. Additionally, eight patients were treated for active disease that was resistant to salvage therapy post-HSCT with a median of five prior lines of therapy (range: four to 10). One of the eight patients crossed over from the adjuvant group, while two patients enrolled twice, but all three patients had active AML that failed another line of salvage therapy after their first MultiTAA-specific T cell infusion. Two of the eight patients achieved objective responses, with one complete response and one partial response, with six patients continuing with stable disease.

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We submitted an investigational new drug, or IND, application to the United States Food and Drug Administration, or the FDA, to initiate a Phase 2 clinical trial of MultiTAA-specific T cell therapy, which we refer to as MT-401 (zedenoleucel), in post-allogeneic HSCT patients with AML in both the adjuvant and active disease setting. The dose administered in this multicenter trial is currently 100 million cells every two weeks for three doses. In the adjuvant setting, patients will be randomized to either MultiTAA-specific T cell therapy at approximately 90 days post-transplant versus standard of care observation, while the active disease patients will receive MT-401 following relapse post-transplant as part of a single-arm group. We have completed the safety lead-in portion of the trial in June 2021. We initiated the remainder of the Phase 2 trial in July 2021 and plan to complete enrollment of approximately 20 patients and activate additional clinical sites across the United States in the fourth quarter of 2021 in order to report results from the active disease arm of the trial in the first quarter of 2022. We expect to begin manufacturing MT-401 for the Phase 2 trial at our cGMP manufacturing facility in the third quarter of 2021.
We reported interim data for an ongoing Phase 1/2 clinical trial of the MultiTAA-specific T cell therapy for the treatment of pancreatic adenocarcinoma being conducted by BCM. In this trial, we have observed a clinical benefit correlated with the post-infusion detection of tumor-reactive T cells in patient peripheral blood and within tumor biopsy samples in patients in the tumor-resection arm of the trial. These T cells exhibited activity against both targeted antigens and non-targeted TAAs, indicating induction of antigen spreading. To date, we have not observed any cytokine release syndrome or neurotoxicity in this trial.
We are also evaluating the MultiTAA-specific T cell therapies in a Phase 2 clinical trial for the treatment of breast cancer and in Phase 1 clinical trials for the treatment of ALL, lymphoma, MM and sarcoma, all of which are being conducted by BCM. As of June 2021, the MultiTAA-specific T cell therapies have been generally well tolerated by all of the patients enrolled in clinical trials in hematological and solid tumor indications with no incidents of cytokine release syndrome or neurotoxicity, which are frequently associated with CAR-T therapies. Our ongoing clinical trials may be also affected by the COVID-19 pandemic. Based on our observations in clinical trials in AML, pancreatic cancer, lymphoma, ALL and MM, we believe that the MultiTAA-specific T cell therapies have the potential to mediate a meaningful anti-tumor effect, as well as significant in vivo expansion of T cells. We may initiate additional clinical trials investigating other indications in addition to our planned Phase 2 trial in post-transplant AML patients.
Pipeline
Our clinical-stage pipeline, including clinical trials being conducted by BCM, is set forth below.
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Corporate Information
We were incorporated under the laws of the State of Nevada in 1991 under the name “TapImmune, Inc.” and reincorporated in Delaware in October 2018 under the name “Marker Therapeutics, Inc.” On October 17, 2018, we completed a business combination with a Delaware corporation that was then known as “Marker Therapeutics, Inc.,” or Private Marker, in accordance with the terms of the Agreement and Plan of Merger and Reorganization dated as of May 15, 2018, or the Merger Agreement, by and among us, Private Marker and Timberwolf Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of TapImmune, or Merger Sub, pursuant to which, among other matters, Merger Sub merged with and into

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Private Marker, with Private Marker continuing as a wholly owned subsidiary of TapImmune and the surviving corporation of the merger. In connection with the merger, we changed our name from “TapImmune, Inc.” to “Marker Therapeutics, Inc.” and Private Marker changed its name to “Marker Cell Therapy, Inc.” and became our wholly owned subsidiary. Our principal executive offices are located at 3200 Southwest Freeway, Suite 2500, Houston, Texas 77027, and our telephone number is (713) 400-6400. Our website is located at http://www.markertherapeutics.com. We do not incorporate by reference into this prospectus the information on, or accessible through, our website, and you should not consider it as part of this prospectus. We have included our website address as an inactive textual reference only.
Implications of Being a Smaller Reporting Company
We are a “smaller reporting company” as defined in Rule 12b-2 promulgated under the Securities Exchange Act of 1934, as amended, or the Exchange Act. We may remain a smaller reporting company until we have a non-affiliate public float in excess of $250 million and annual revenues in excess of $100 million, or a non-affiliate public float in excess of $700 million, each as determined on an annual basis. A smaller reporting company may take advantage of relief from some of the reporting requirements and other burdens that are otherwise applicable generally to public companies. These provisions include:

being permitted to provide only two years of audited financial statements, in addition to any required unaudited interim financial statements, with correspondingly reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure;

not being required to comply with the auditor attestation requirements in the assessment of our internal control over financial reporting; and

reduced disclosure obligations regarding executive compensation in our periodic reports, proxy statements and registration statements.
The Securities We May Offer
We may offer shares of our common stock and preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in combination, up to a total aggregate offering price of $300,000,000 from time to time in one or more offerings under this prospectus, together with any applicable prospectus supplement and any related free writing prospectus, at prices and on terms to be determined by market conditions at the time of the relevant offering. This prospectus provides you with a general description of the securities we may offer. Each time we offer a type or series of securities under this prospectus, we will provide a prospectus supplement that will describe the specific amounts, prices and other important terms of the securities, including, to the extent applicable:

designation or classification;

aggregate principal amount or aggregate offering price;

maturity;

original issue discount, if any;

rates and times of payment of interest or dividends, if any;

redemption, conversion, exchange or sinking fund terms, if any;

conversion or exchange prices or rates, if any, and, if applicable, any provisions for changes to or adjustments in the conversion or exchange prices or rates and in the securities or other property receivable upon conversion or exchange;

ranking;

restrictive covenants, if any;

voting or other rights, if any; and

important U.S. federal income tax considerations.
The applicable prospectus supplement and any related free writing prospectus that we may authorize to be provided to you may also add, update or change information contained in this prospectus or in documents

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we have incorporated by reference. However, no prospectus supplement or free writing prospectus will offer a security that is not registered and described in this prospectus at the time of the effectiveness of the registration statement of which this prospectus is a part.
This prospectus may not be used to consummate a sale of securities unless it is accompanied by a prospectus supplement.
We may sell the securities directly to investors or through underwriters, dealers or agents. We, and our underwriters or agents, reserve the right to accept or reject all or part of any proposed purchase of securities. If we do offer securities through underwriters or agents, we will include in the applicable prospectus supplement:

the names of those underwriters or agents;

applicable fees, discounts and commissions to be paid to them;

details regarding over-allotment options, if any; and

the estimated net proceeds to us.
Common Stock.   We may issue shares of our common stock from time to time. Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders and do not have cumulative voting rights. An election of directors by our stockholders shall be determined by a plurality of the votes cast by the stockholders entitled to vote on the election. Holders of common stock are entitled to receive ratably any dividends as may be declared by our board of directors, subject to any preferential dividend rights of any series of preferred stock that we may designate and issue in the future.
In the event of our liquidation, dissolution or winding up, the holders of common stock are entitled to receive ratably our net assets available for distribution to stockholders after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock. Holders of common stock have no preemptive, subscription, redemption or conversion rights. There are no redemption or sinking fund provisions applicable to the common stock. The rights, preferences and privileges of holders of common stock are subject to and may be adversely affected by the rights of the holders of shares of any series of preferred stock that we may designate and issue in the future.
Preferred Stock.   We may issue shares of our preferred stock from time to time, in one or more series. Under our certificate of incorporation, our board of directors has the authority, without further action by the stockholders, to issue up to 5,000,000 shares of preferred stock, par value $0.001 per share. You should refer to our certificate of incorporation and our bylaws, both of which are included as exhibits to documents incorporated by reference in the registration statement of which this prospectus is a part.
Our board of directors may, without further action by our stockholders, from time to time, direct the issuance of shares of preferred stock in series and may, at the time of issuance, determine the rights, preferences and limitations of each series, including voting rights, dividend rights and redemption and liquidation preferences. Satisfaction of any dividend preferences of outstanding shares of preferred stock would reduce the amount of funds available for the payment of dividends on shares of our common stock. Holders of shares of preferred stock may be entitled to receive a preference payment in the event of any liquidation, dissolution or winding-up of our company before any payment is made to the holders of shares of our common stock. In some circumstances, the issuance of shares of preferred stock may render more difficult or tend to discourage a merger, tender offer or proxy contest, the assumption of control by a holder of a large block of our securities or the removal of incumbent management. Upon the affirmative vote of our board of directors, without stockholder approval, we may issue shares of preferred stock with voting and conversion rights which could adversely affect the holders of shares of our common stock.
If we offer a specific series of preferred stock under this prospectus, we will describe the terms of the preferred stock in the prospectus supplement for such offering and will file a copy of the certificate of designation establishing the terms of the preferred stock with the SEC. We urge you to read the applicable prospectus supplement (and any free writing prospectus that we may authorize to be provided to you) related to the series of preferred stock being offered, as well as the complete certificate of designation that contains the terms of the applicable series of preferred stock.

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Debt Securities.   We may issue debt securities from time to time, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. The senior debt securities will rank equally with any other unsecured and unsubordinated debt. The subordinated debt securities will be subordinate and junior in right of payment, to the extent and in the manner described in the instrument governing the debt, to all of our senior indebtedness. Convertible debt securities will be convertible into or exchangeable for our common stock or other securities. Conversion may be mandatory or at the holder’s option and would be at prescribed conversion rates.
Any debt securities issued under this prospectus will be issued under one or more documents called indentures, which are contracts between us and a national banking association or other eligible party, as trustee. In this prospectus, we have summarized certain general features of the debt securities. We urge you, however, to read the applicable prospectus supplement (and any free writing prospectus that we may authorize to be provided to you) related to the series of debt securities being offered, as well as the complete indentures that contain the terms of the debt securities. A form of indenture has been filed as an exhibit to the registration statement of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of the debt securities being offered will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.
Warrants.   We may issue warrants for the purchase of common stock, preferred stock and/or debt securities in one or more series. We may issue warrants independently or together with common stock, preferred stock and/or debt securities, and the warrants may be attached to or separate from these securities. In this prospectus, we have summarized certain general features of the warrants. We urge you, however, to read the applicable prospectus supplement (and any free writing prospectus that we may authorize to be provided to you) related to the particular series of warrants being offered, as well as the complete warrant agreements and warrant certificates that contain the terms of the warrants. Forms of the warrant agreements and forms of warrant certificates containing the terms of the warrants that may be offered have been filed as exhibits to the registration statement of which this prospectus is a part, and supplemental warrant agreements and forms of warrant certificates will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC before the issuance of such warrants.
Any warrants issued under this prospectus will be evidenced by warrant certificates. Warrants may be issued under an applicable warrant agreement that we enter into with a warrant agent. We will indicate the name and address of the warrant agent, if applicable, in the prospectus supplement relating to the particular series of warrants being offered.

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RISK FACTORS
Investing in our securities involves a high degree of risk. You should carefully review the risks and uncertainties described under the heading “Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in our Annual Report on Form 10-K for the year ended December 31, 2020, as updated by any subsequently filed periodic reports and other documents that are incorporated by reference into this prospectus, before deciding whether to purchase any of the securities being registered pursuant to the registration statement of which this prospectus is a part. Each of the risk factors described in the documents referenced above could adversely affect our business, operating results and financial condition, as well as adversely affect the value of an investment in our securities, and the occurrence of any of these risks might cause you to lose all or part of your investment. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus and the documents incorporated by reference herein contain forward-looking statements. These are based on our management’s current beliefs, expectations and assumptions about future events, conditions and results and on information currently available to us. Discussions containing these forward-looking statements may be found, among other places, in the sections entitled “Business,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in the documents incorporated by reference herein.
Any statements in this prospectus, or incorporated herein, about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical facts and are forward-looking statements. Within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act, these forward-looking statements include statements regarding:

the timing, progress and results of clinical trials of MultiTAA-specific T cell therapies and our other product candidates, including statements regarding the timing of initiation and completion of preclinical studies or clinical trials or related preparatory work, the period during which the results of the trials will become available and our research and development programs;

the timing of any submission of filings for regulatory approval of product candidates and our ability to obtain and maintain regulatory approvals for product candidates for any indication;

our ability to successfully commercialize product candidates;

our expectations regarding the potential benefits, activity, effectiveness and safety of our product candidates;

our expectations regarding the size of the patient populations, market acceptance and opportunity for and clinical utility of product candidates, if approved for commercial use;

our manufacturing capabilities and strategy, including the ease, scalability and commercial viability of our manufacturing methods and processes;

our expectations regarding the scope of any approved indications for product candidates;

the potential benefits of and our ability to maintain our relationships and collaborations with BCM and other potential collaboration or strategic relationships;

our ability to use the MultiTAA-specific T cell platform to develop future product candidates;

our estimates of our expenses, ongoing losses, future revenue, capital requirements and our needs for or ability to obtain additional funding;

our ability to identify, recruit and retain key personnel;

our ability to protect and enforce our intellectual property position for our product candidates, and the scope of such protection;

our financial performance;

our competitive position and the development of and projections relating to our competitors or our industry; and

the impact of laws and regulations.
In some cases, you can identify forward-looking statements by the words “may,” “might,” “can,” “will,” “to be,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “objective,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “likely,” “continue” and “ongoing,” or the negative of these terms, or other comparable terminology intended to identify statements about the future, although not all forward-looking statements contain these words. These statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements.

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You should refer to the “Risk Factors” section contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus, for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. Given these risks, uncertainties and other factors, many of which are beyond our control, we cannot assure you that the forward-looking statements in this prospectus will prove to be accurate, and you should not place undue reliance on these forward-looking statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all.
Except as required by law, we assume no obligation to update these forward-looking statements publicly, or to revise any forward-looking statements to reflect events or developments occurring after the date of this prospectus, even if new information becomes available in the future.

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USE OF PROCEEDS
We will retain broad discretion over the use of the net proceeds from the sale of the securities offered hereby. Except as described in any applicable prospectus supplement or in any free writing prospectuses that we may authorize to be provided to you in connection with a specific offering, we currently intend to use the net proceeds from the sale of the securities offered hereby for working capital, capital expenditures and general corporate purposes. We may also use a portion of the net proceeds to invest in or acquire businesses or technologies that we believe are complementary to our own, although we have no current plans, commitments or agreements with respect to any acquisitions as of the date of this prospectus. We will set forth in the applicable prospectus supplement or free writing prospectus our intended use for the net proceeds received from the sale of any securities sold pursuant to the prospectus supplement or free writing prospectus. Pending these uses, we intend to invest the net proceeds in investment-grade, interest-bearing securities.

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DESCRIPTION OF CAPITAL STOCK
The following description of our capital stock and provisions of our certificate of incorporation and bylaws are summaries. You should also refer to the certificate of incorporation and the bylaws, which are filed as exhibits to the registration statement of which this prospectus is part.
General
Our certificate of incorporation authorizes us to issue up to 150,000,000 shares of common stock, $0.001 par value per share, and 5,000,000 shares of preferred stock, $0.001 par value per share. Our board of directors may establish the rights and preferences of the preferred stock from time to time. As of June 30, 2021, we had outstanding 83,078,675 shares of common stock and no shares of preferred stock outstanding.
Common Stock
Voting Rights
Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders and do not have cumulative voting rights. As a result, the holders of a plurality of the shares of common stock entitled to vote in any election of directors can elect all of the directors standing for election, if they should so choose. All other matters to be voted on by our stockholders must be approved by a majority of the votes cast on the matter unless otherwise provided by law, our certificate of incorporation or our bylaws.
Dividends
Holders of common stock are entitled to receive ratably any dividends as may be declared by our board of directors, subject to any preferential dividend rights of any series of preferred stock that our board of directors may designate and issue in the future.
Liquidation
In the event of our liquidation, dissolution or winding up, the holders of common stock are entitled to receive ratably our net assets available for distribution to stockholders after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock.
Rights and Preferences
Holders of common stock have no preemptive, subscription, redemption or conversion rights. There are no redemption or sinking fund provisions applicable to the common stock. The rights, preferences and privileges of holders of common stock are subject to and may be adversely affected by the rights of the holders of shares of any series of preferred stock that our board of directors may designate and issue in the future.
Preferred Stock
Pursuant to our certificate of incorporation, our board of directors has the authority, without further action by our stockholders, from time to time, to designate and issue up to 5,000,000 shares of preferred stock in one or more series. Our board of directors may determine the rights, preferences and limitations of each series, including voting rights, dividend rights and redemption and liquidation preferences. Satisfaction of any dividend preferences of outstanding shares of preferred stock would reduce the amount of funds available for the payment of dividends on shares of our common stock. Holders of shares of preferred stock may be entitled to receive a preference payment in the event of any liquidation, dissolution or winding-up of our company before any payment is made to the holders of shares of our common stock. In some circumstances, the issuance of shares of preferred stock may render more difficult or tend to discourage a merger, tender offer or proxy contest, the assumption of control by a holder of a large block of our securities or the removal of incumbent management. Upon the affirmative vote of our board of

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directors, without stockholder approval, we may issue shares of preferred stock with voting and conversion rights which could adversely affect the holders of shares of our common stock.
Our board of directors will fix the designations, voting powers, preferences and rights of each series, as well as the qualifications, limitations or restrictions thereof, of the preferred stock of each series that we offer under this prospectus and applicable prospectus supplements in the certificate of designation relating to that series. We will file as an exhibit to the registration statement of which this prospectus is a part, or will incorporate by reference from reports that we file with the SEC, the form of any certificate of designation that describes the terms of the series of preferred stock we are offering before the issuance of that series of preferred stock. This description will include:

the title and stated value;

the number of shares we are offering;

the liquidation preference per share;

the purchase price per share;

the dividend rate per share, dividend period and payment dates and method of calculation for dividends;

whether dividends will be cumulative or non-cumulative and, if cumulative, the date from which dividends will accumulate;

our right, if any, to defer payment of dividends and the maximum length of any such deferral period;

the procedures for any auction and remarketing, if any;

the provisions for a sinking fund, if any;

the provisions for redemption or repurchase, if applicable, and any restrictions on our ability to exercise those redemption and repurchase rights;

any listing of the preferred stock on any securities exchange or market;

whether the preferred stock will be convertible into our common stock or other securities of ours, including depositary shares and warrants, and, if applicable, the conversion period, the conversion price, or how it will be calculated, and under what circumstances it may be adjusted;

whether the preferred stock will be exchangeable into debt securities, and, if applicable, the exchange period, the exchange price, or how it will be calculated, and under what circumstances it may be adjusted;

voting rights, if any, of the preferred stock;

preemption rights, if any;

restrictions on transfer, sale or other assignment, if any;

whether interests in the preferred stock will be represented by depositary shares;

a discussion of any material or special U.S. federal income tax considerations applicable to the preferred stock;

the relative ranking and preferences of the preferred stock as to dividend rights and rights if we liquidate, dissolve or wind up our affairs;

any limitations on issuances of any class or series of preferred stock ranking senior to or on a parity with the series of preferred stock being issued as to dividend rights and rights if we liquidate, dissolve or wind up our affairs; and

any other specific terms, rights, preferences, privileges, qualifications or restrictions of the preferred stock.
The General Corporation Law of the State of Delaware, or DGCL, the state of our incorporation, provides that the holders of preferred stock will have the right to vote separately as a class (or, in some

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cases, as a series) on an amendment to our certificate of incorporation if the amendment would change the par value or, unless the certificate of incorporation provided otherwise, the number of authorized shares of the class or change the powers, preferences or special rights of the class or series so as to adversely affect the class or series, as the case may be. This right is in addition to any voting rights that may be provided for in the applicable certificate of designation.
The issuance of preferred stock could adversely affect the voting power of holders of common stock and reduce the likelihood that common stockholders will receive dividend payments and payments upon liquidation. The issuance could have the effect of decreasing the market price of the common stock. The issuance of preferred stock also could have the effect of delaying, deterring or preventing a change in control of us.
Anti-Takeover Provisions
Section 203 of the DGCL
We are subject to Section 203 of the DGCL, or Section 203, which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;

upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the voting stock outstanding, but not the outstanding voting stock owned by the interested stockholder, those shares owned (i) by persons who are directors and also officers and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting of the stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock that is not owned by the interested stockholder.
In general, Section 203 defines a “business combination” to include the following:

any merger or consolidation involving the corporation and the interested stockholder;

any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;

subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;

any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation beneficially owned by the interested stockholder; or

the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits by or through the corporation.
In general, Section 203 defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.
Certificate of Incorporation and Bylaws
Because our stockholders do not have cumulative voting rights, stockholders holding a plurality of the shares of our common stock outstanding will be able to elect all of our directors. Our bylaws also provide that directors may be removed by the stockholders upon the vote of a majority of the shares entitled to vote an election of directors, and if a director was elected by a voting group of stockholders, only stockholders

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from that voting group may vote to remove such director, and such vacancy may be filled only by the stockholders of that voting group. Furthermore, the authorized number of directors may be changed only by resolution of the board of directors, and vacancies and newly created directorships on the board of directors may, except as otherwise required by law or determined by the board, only be filled by a majority vote of the directors then serving on the board, even though less than a quorum.
Our bylaws provide that only a majority of the authorized directors on our board of directors, the chairman of the board or the chief executive officer to call a special meeting of stockholders. Our bylaws also provide that stockholders seeking to present proposals before a meeting of stockholders to nominate candidates for election as directors at a meeting of stockholders must provide timely advance notice in writing, and specify requirements as to the form and content of a stockholder’s notice.
The combination of these provisions may make it more difficult for our existing stockholders to replace our board of directors as well as for another party to obtain control of us by replacing our board of directors. Since our board of directors has the power to retain and discharge our officers, these provisions could also make it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change our control.
These provisions are intended to enhance the likelihood of continued stability in the composition of our board of directors and its policies and to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to reduce our vulnerability to hostile takeovers and to discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender offers for our shares and may have the effect of delaying changes in our control or management. As a consequence, these provisions may also inhibit fluctuations in the market price of our stock that could result from actual or rumored takeover attempts. We believe that the benefits of these provisions, including increased protection of our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure our company, outweigh the disadvantages of discouraging takeover proposals, because negotiation of takeover proposals could result in an improvement of their terms.
Transfer Agent and Registrar
The transfer agent and registrar for our common stock is American Stock Transfer & Company, LLC, with offices at 6201 15th Avenue, Brooklyn, New York 11219. The transfer agent for any series of preferred stock that we may offer under this prospectus will be named and described in the prospectus supplement for that series.
Listing on Nasdaq
Our common stock is listed on The Nasdaq Global Market under the symbol “MRKR.”

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DESCRIPTION OF DEBT SECURITIES
We may issue debt securities from time to time, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. While the terms we have summarized below will apply generally to any debt securities that we may offer under this prospectus, we will describe the particular terms of any debt securities that we may offer in more detail in the applicable prospectus supplement. The terms of any debt securities offered under a prospectus supplement may differ from the terms described below. Unless the context requires otherwise, whenever we refer to the indenture, we also are referring to any supplemental indentures that specify the terms of a particular series of debt securities.
We will issue the debt securities under the indenture that we will enter into with the trustee named in the indenture. The indenture will be qualified under the Trust Indenture Act of 1939, as amended, or the Trust Indenture Act. We have filed the form of indenture as an exhibit to the registration statement of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of the debt securities being offered will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.
The following summary of material provisions of the debt securities and the indenture is subject to, and qualified in its entirety by reference to, all of the provisions of the indenture applicable to a particular series of debt securities. We urge you to read the applicable prospectus supplements and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete indenture that contains the terms of the debt securities.
General
The indenture does not limit the amount of debt securities that we may issue. It provides that we may issue debt securities up to the principal amount that we may authorize and may be in any currency or currency unit that we may designate. Except for the limitations on consolidation, merger and sale of all or substantially all of our assets contained in the indenture, the terms of the indenture do not contain any covenants or other provisions designed to give holders of any debt securities protection against changes in our operations, financial condition or transactions involving us.
We may issue the debt securities issued under the indenture as “discount securities,” which means they may be sold at a discount below their stated principal amount. These debt securities, as well as other debt securities that are not issued at a discount, may be issued with “original issue discount,” or OID, for U.S. federal income tax purposes because of interest payment and other characteristics or terms of the debt securities. Material U.S. federal income tax considerations applicable to debt securities issued with OID will be described in more detail in any applicable prospectus supplement.
We will describe in the applicable prospectus supplement the terms of the series of debt securities being offered, including:

the title of the series of debt securities;

any limit upon the aggregate principal amount that may be issued;

the maturity date or dates;

the form of the debt securities of the series;

the applicability of any guarantees;

whether or not the debt securities will be secured or unsecured, and the terms of any secured debt;

whether the debt securities rank as senior debt, senior subordinated debt, subordinated debt or any combination thereof, and the terms of any subordination;

if the price (expressed as a percentage of the aggregate principal amount thereof) at which such debt securities will be issued is a price other than the principal amount thereof, the portion of the principal amount thereof payable upon declaration of acceleration of the maturity thereof, or if applicable, the portion of the principal amount of such debt securities that is convertible into another security or the method by which any such portion shall be determined;

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the interest rate or rates, which may be fixed or variable, or the method for determining the rate and the date interest will begin to accrue, the dates interest will be payable and the regular record dates for interest payment dates or the method for determining such dates;

our right, if any, to defer payment of interest and the maximum length of any such deferral period;

if applicable, the date or dates after which, or the period or periods during which, and the price or prices at which, we may, at our option, redeem the series of debt securities pursuant to any optional or provisional redemption provisions and the terms of those redemption provisions;

the date or dates, if any, on which, and the price or prices at which we are obligated, pursuant to any mandatory sinking fund or analogous fund provisions or otherwise, to redeem, or at the holder’s option to purchase, the series of debt securities and the currency or currency unit in which the debt securities are payable;

the denominations in which we will issue the series of debt securities, if other than denominations of $1,000 and any integral multiple thereof;

any and all terms, if applicable, relating to any auction or remarketing of the debt securities of that series and any security for our obligations with respect to such debt securities and any other terms which may be advisable in connection with the marketing of debt securities of that series;

whether the debt securities of the series shall be issued in whole or in part in the form of a global security or securities;

the terms and conditions, if any, upon which such global security or securities may be exchanged in whole or in part for other individual securities;

the depositary for such global security or securities;

if applicable, the provisions relating to conversion or exchange of any debt securities of the series and the terms and conditions upon which such debt securities will be so convertible or exchangeable, including the conversion or exchange price, as applicable, or how it will be calculated and may be adjusted, any mandatory or optional (at our option or the holders’ option) conversion or exchange features, the applicable conversion or exchange period and the manner of settlement for any conversion or exchange;

if other than the full principal amount thereof, the portion of the principal amount of debt securities of the series which shall be payable upon declaration of acceleration of the maturity thereof;

additions to or changes in the covenants applicable to the particular debt securities being issued, including, among others, the consolidation, merger or sale covenant;

additions to or changes in the events of default with respect to the securities and any change in the right of the trustee or the holders to declare the principal, premium, if any, and interest, if any, with respect to such securities to be due and payable;

additions to or changes in or deletions of the provisions relating to covenant defeasance and legal defeasance;

additions to or changes in the provisions relating to satisfaction and discharge of the indenture;

additions to or changes in the provisions relating to the modification of the indenture both with and without the consent of holders of debt securities issued under the indenture;

the currency of payment of debt securities if other than U.S. dollars and the manner of determining the equivalent amount in U.S. dollars;

whether interest will be payable in cash or additional debt securities at our or the holders’ option and the terms and conditions upon which the election may be made;

the terms and conditions, if any, upon which we will pay amounts in addition to the stated interest, premium, if any and principal amounts of the debt securities of the series to any holder that is not a “United States person” for federal tax purposes;

any restrictions on transfer, sale or assignment of the debt securities of the series; and

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any other specific terms, preferences, rights or limitations of, or restrictions on, the debt securities, any other additions or changes in the provisions of the indenture, and any terms that may be required by us or advisable under applicable laws or regulations.
Conversion or Exchange Rights
We will set forth in the applicable prospectus supplement the terms on which a series of debt securities may be convertible into or exchangeable for our common stock or our other securities. We will include provisions as to settlement upon conversion or exchange and whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of our common stock or our other securities that the holders of the series of debt securities receive would be subject to adjustment.
Consolidation, Merger or Sale
Unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, the indenture will not contain any covenant that restricts our ability to merge or consolidate, or sell, convey, transfer or otherwise dispose of our assets as an entirety or substantially as an entirety. However, any successor to or acquirer of such assets (other than a subsidiary of ours) must assume all of our obligations under the indenture or the debt securities, as appropriate.
Events of Default under the Indenture
Unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, the following are events of default under the indenture with respect to any series of debt securities that we may issue:

if we fail to pay any installment of interest on any series of debt securities, as and when the same shall become due and payable, and such default continues for a period of 90 days; provided, however, that a valid extension of an interest payment period by us in accordance with the terms of any indenture supplemental thereto shall not constitute a default in the payment of interest for this purpose;

if we fail to pay the principal of, or premium, if any, on any series of debt securities as and when the same shall become due and payable whether at maturity, upon redemption, by declaration or otherwise, or in any payment required by any sinking or analogous fund established with respect to such series; provided, however, that a valid extension of the maturity of such debt securities in accordance with the terms of any indenture supplemental thereto shall not constitute a default in the payment of principal or premium, if any;

if we fail to observe or perform any other covenant or agreement contained in the debt securities or the indenture, other than a covenant specifically relating to another series of debt securities, and our failure continues for 90 days after we receive written notice of such failure, requiring the same to be remedied and stating that such is a notice of default thereunder, from the trustee or holders of at least 25% in aggregate principal amount of the outstanding debt securities of the applicable series; and

if specified events of bankruptcy, insolvency or reorganization occur.
If an event of default with respect to debt securities of any series occurs and is continuing, other than an event of default specified in the last bullet point above, the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series, by notice to us in writing, and to the trustee if notice is given by such holders, may declare the unpaid principal of, premium, if any, and accrued interest, if any, due and payable immediately. If an event of default specified in the last bullet point above occurs with respect to us, the principal amount of and accrued interest, if any, of each issue of debt securities then outstanding shall be due and payable without any notice or other action on the part of the trustee or any holder.
The holders of a majority in principal amount of the outstanding debt securities of an affected series may waive any default or event of default with respect to the series and its consequences, except defaults or

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events of default regarding payment of principal, premium, if any, or interest, unless we have cured the default or event of default in accordance with the indenture. Any waiver shall cure the default or event of default.
Subject to the terms of the indenture, if an event of default under an indenture shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under such indenture at the request or direction of any of the holders of the applicable series of debt securities, unless such holders have offered the trustee reasonable indemnity. The holders of a majority in principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee, with respect to the debt securities of that series, provided that:

the direction so given by the holder is not in conflict with any law or the applicable indenture; and

subject to its duties under the Trust Indenture Act, the trustee need not take any action that might involve it in personal liability or might be unduly prejudicial to the holders not involved in the proceeding.
A holder of the debt securities of any series will have the right to institute a proceeding under the indenture or to appoint a receiver or trustee, or to seek other remedies only if:

the holder has given written notice to the trustee of a continuing event of default with respect to that series;

the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series have made written request,

such holders have offered to the trustee indemnity satisfactory to it against the costs, expenses and liabilities to be incurred by the trustee in compliance with the request; and

the trustee does not institute the proceeding, and does not receive from the holders of a majority in aggregate principal amount of the outstanding debt securities of that series other conflicting directions within 90 days after the notice, request and offer.
These limitations do not apply to a suit instituted by a holder of debt securities if we default in the payment of the principal, premium, if any, or interest on, the debt securities.
We will periodically file statements with the trustee regarding our compliance with specified covenants in the indenture.
Modification of Indenture; Waiver
We and the trustee may change an indenture without the consent of any holders with respect to specific matters:

to cure any ambiguity, defect or inconsistency in the indenture or in the debt securities of any series;

to comply with the provisions described above under “Description of Debt Securities — Consolidation, Merger or Sale”;

to provide for uncertificated debt securities in addition to or in place of certificated debt securities;

to add to our covenants, restrictions, conditions or provisions such new covenants, restrictions, conditions or provisions for the benefit of the holders of all or any series of debt securities, to make the occurrence, or the occurrence and the continuance, of a default in any such additional covenants, restrictions, conditions or provisions an event of default or to surrender any right or power conferred upon us in the indenture;

to add to, delete from or revise the conditions, limitations, and restrictions on the authorized amount, terms, or purposes of issue, authentication and delivery of debt securities, as set forth in the indenture;

to make any change that does not adversely affect the interests of any holder of debt securities of any series in any material respect;

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to provide for the issuance of and establish the form and terms and conditions of the debt securities of any series as provided above under “Description of Debt Securities — General” to establish the form of any certifications required to be furnished pursuant to the terms of the indenture or any series of debt securities, or to add to the rights of the holders of any series of debt securities;

to evidence and provide for the acceptance of appointment under any indenture by a successor trustee; or

to comply with any requirements of the SEC in connection with the qualification of any indenture under the Trust Indenture Act.
In addition, under the indenture, the rights of holders of a series of debt securities may be changed by us and the trustee with the written consent of the holders of at least a majority in aggregate principal amount of the outstanding debt securities of each series that is affected. However, unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, we and the trustee may make the following changes only with the consent of each holder of any outstanding debt securities affected:

extending the fixed maturity of any debt securities of any series;

reducing the principal amount, reducing the rate of or extending the time of payment of interest, or reducing any premium payable upon the redemption of any series of any debt securities; or

reducing the percentage of debt securities, the holders of which are required to consent to any amendment, supplement, modification or waiver.
Discharge
Each indenture provides that we can elect to be discharged from our obligations with respect to one or more series of debt securities, except for specified obligations, including obligations to:

provide for payment;

register the transfer or exchange of debt securities of the series;

replace stolen, lost or mutilated debt securities of the series;

pay principal of and premium and interest on any debt securities of the series;

maintain paying agencies;

hold monies for payment in trust;

recover excess money held by the trustee;

compensate and indemnify the trustee; and

appoint any successor trustee.
In order to exercise our rights to be discharged, we must deposit with the trustee money or government obligations sufficient to pay all the principal of, any premium, if any, and interest on, the debt securities of the series on the dates payments are due.
Form, Exchange and Transfer
We will issue the debt securities of each series only in fully registered form without coupons and, unless we provide otherwise in the applicable prospectus supplement, in denominations of $1,000 and any integral multiple thereof. The indenture provides that we may issue debt securities of a series in temporary or permanent global form and as book-entry securities that will be deposited with, or on behalf of, The Depository Trust Company, or DTC, or another depositary named by us and identified in the applicable prospectus supplement with respect to that series. To the extent the debt securities of a series are issued in global form and as book-entry, a description of terms relating to any book-entry securities will be set forth in the applicable prospectus supplement.
At the option of the holder, subject to the terms of the indenture and the limitations applicable to global securities described in the applicable prospectus supplement, the holder of the debt securities of any

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series can exchange the debt securities for other debt securities of the same series, in any authorized denomination and of like tenor and aggregate principal amount.
Subject to the terms of the indenture and the limitations applicable to global securities set forth in the applicable prospectus supplement, holders of the debt securities may present the debt securities for exchange or for registration of transfer, duly endorsed or with the form of transfer endorsed thereon duly executed if so required by us or the security registrar, at the office of the security registrar or at the office of any transfer agent designated by us for this purpose. Unless otherwise provided in the debt securities that the holder presents for transfer or exchange, we will impose no service charge for any registration of transfer or exchange, but we may require payment of any taxes or other governmental charges.
We will name in the applicable prospectus supplement the security registrar, and any transfer agent in addition to the security registrar, that we initially designate for any debt securities. We may at any time designate additional transfer agents or rescind the designation of any transfer agent or approve a change in the office through which any transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for the debt securities of each series.
If we elect to redeem the debt securities of any series, we will not be required to:

issue, register the transfer of, or exchange any debt securities of that series during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption of any debt securities that may be selected for redemption and ending at the close of business on the day of the mailing; or

register the transfer of or exchange any debt securities so selected for redemption, in whole or in part, except the unredeemed portion of any debt securities we are redeeming in part.
Information Concerning the Trustee
The trustee, other than during the occurrence and continuance of an event of default under an indenture, undertakes to perform only those duties as are specifically set forth in the applicable indenture. Upon an event of default under an indenture, the trustee must use the same degree of care as a prudent person would exercise or use in the conduct of his or her own affairs. Subject to this provision, the trustee is under no obligation to exercise any of the powers given it by the indenture at the request of any holder of debt securities unless it is offered reasonable security and indemnity against the costs, expenses and liabilities that it might incur.
Payment and Paying Agents
Unless we otherwise indicate in the applicable prospectus supplement, we will make payment of the interest on any debt securities on any interest payment date to the person in whose name the debt securities, or one or more predecessor securities, are registered at the close of business on the regular record date for the interest.
We will pay principal of and any premium and interest on the debt securities of a particular series at the office of the paying agents designated by us, except that unless we otherwise indicate in the applicable prospectus supplement, we will make interest payments by check that we will mail to the holder or by wire transfer to certain holders. Unless we otherwise indicate in the applicable prospectus supplement, we will designate the corporate trust office of the trustee as our sole paying agent for payments with respect to debt securities of each series. We will name in the applicable prospectus supplement any other paying agents that we initially designate for the debt securities of a particular series. We will maintain a paying agent in each place of payment for the debt securities of a particular series.
All money we pay to a paying agent or the trustee for the payment of the principal of or any premium or interest on any debt securities that remains unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and the holder of the debt security thereafter may look only to us for payment thereof.
Governing Law
The indenture and the debt securities will be governed by and construed in accordance with the internal laws of the State of New York, except to the extent that the Trust Indenture Act is applicable.

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DESCRIPTION OF WARRANTS
The following description, together with the additional information we may include in any applicable prospectus supplement and in any related free writing prospectuses, summarizes the material terms and provisions of the warrants that we may offer under this prospectus, which may consist of warrants to purchase common stock, preferred stock or debt securities and may be issued in one or more series. Warrants may be offered independently or together with common stock, preferred stock or debt securities offered by any prospectus supplement, and may be attached to or separate from those securities. While the terms we have summarized below will apply generally to any warrants that we may offer under this prospectus, we will describe the particular terms of any series of warrants that we may offer in more detail in the applicable prospectus supplement and any applicable free writing prospectus. The terms of any warrants offered under a prospectus supplement may differ from the terms described below. However, no prospectus supplement will fundamentally change the terms that are set forth in this prospectus or offer a security that is not registered and described in this prospectus at the time of its effectiveness.
We have filed forms of the warrant agreements and forms of warrant certificates containing the terms of the warrants that may be offered as exhibits to the registration statement of which this prospectus is a part. We will file as exhibits to the registration statement of which this prospectus is a part, or will incorporate by reference from reports that we file with the SEC, the form of warrant agreement, if any, including a form of warrant certificate, that describes the terms of the particular series of warrants we are offering. The following summaries of material provisions of the warrants and the warrant agreements are subject to, and qualified in their entirety by reference to, all the provisions of the warrant agreement and warrant certificate applicable to the particular series of warrants that we may offer under this prospectus. We urge you to read the applicable prospectus supplements related to the particular series of warrants that we may offer under this prospectus, as well as any related free writing prospectuses, and the complete warrant agreements and warrant certificates that contain the terms of the warrants.
General
We will describe in the applicable prospectus supplement the terms relating to a series of warrants being offered, including, to the extent applicable:

the title of such securities;

the offering price or prices and aggregate number of warrants offered;

the currency or currencies for which the warrants may be purchased;

if applicable, the designation and terms of the securities with which the warrants are issued and the number of warrants issued with each such security or each principal amount of such security;

if applicable, the date on and after which the warrants and the related securities will be separately transferable;

if applicable, the minimum or maximum amount of such warrants which may be exercised at any one time;

in the case of warrants to purchase debt securities, the principal amount of debt securities purchasable upon exercise of one warrant and the price at which, and currency in which, this principal amount of debt securities may be purchased upon such exercise;

in the case of warrants to purchase common stock or preferred stock, the number of shares of common stock or preferred stock, as the case may be, purchasable upon the exercise of one warrant and the price at which, and the currency in which, these shares may be purchased upon such exercise;

the effect of any merger, consolidation, sale or other disposition of our business on the warrant agreements and the warrants;

the terms of any rights to redeem or call the warrants;

the terms of any rights to force the exercise of the warrants;

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any provisions for changes to or adjustments in the exercise price or number of securities issuable upon exercise of the warrants;

the dates on which the right to exercise the warrants will commence and expire;

the manner in which the warrant agreements and warrants may be modified;

a discussion of any material or special U.S. federal income tax consequences of holding or exercising the warrants;

the terms of the securities issuable upon exercise of the warrants; and

any other specific terms, preferences, rights or limitations of or restrictions on the warrants.
Before exercising their warrants, holders of warrants will not have any of the rights of holders of the securities purchasable upon such exercise, including:

in the case of warrants to purchase debt securities, the right to receive payments of principal of, or premium, if any, or interest on, the debt securities purchasable upon exercise or to enforce covenants in the applicable indenture; or

in the case of warrants to purchase common stock or preferred stock, the right to receive dividends, if any, or, payments upon our liquidation, dissolution or winding up or to exercise voting rights, if any.
Exercise of Warrants
Each warrant will entitle the holder to purchase the securities that we specify in the applicable prospectus supplement at the exercise price that we describe in the applicable prospectus supplement. Unless we otherwise specify in the applicable prospectus supplement, holders of the warrants may exercise the warrants at any time up to the specified time on the expiration date that we set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants will become void.
Unless we otherwise specify in the applicable prospectus supplement, holders of the warrants may exercise the warrants by delivering the warrant certificate representing the warrants to be exercised together with specified information, and paying the required amount to the warrant agent in immediately available funds, as provided in the applicable prospectus supplement. We will set forth on the reverse side of the warrant certificate and in the applicable prospectus supplement the information that the holder of the warrant will be required to deliver to the warrant agent in connection with the exercise of the warrant.
Upon receipt of the required payment and the warrant certificate properly completed and duly executed at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement, we will issue and deliver the securities purchasable upon such exercise. If fewer than all of the warrants represented by the warrant certificate are exercised, then we will issue a new warrant certificate for the remaining amount of warrants. If we so indicate in the applicable prospectus supplement, holders of the warrants may surrender securities as all or part of the exercise price for warrants.
Governing Law
Unless we provide otherwise in the applicable prospectus supplement, the warrants and warrant agreements, and any claim, controversy or dispute arising under or related to the warrants or warrant agreements, will be governed by and construed in accordance with the laws of the State of New York.
Enforceability of Rights by Holders of Warrants
Each warrant agent will act solely as our agent under the applicable warrant agreement and will not assume any obligation or relationship of agency or trust with any holder of any warrant. A single bank or trust company may act as warrant agent for more than one issue of warrants. A warrant agent will have no duty or responsibility in case of any default by us under the applicable warrant agreement or warrant, including any duty or responsibility to initiate any proceedings at law or otherwise, or to make any demand upon us. Any holder of a warrant may, without the consent of the related warrant agent or the holder of any other warrant, enforce by appropriate legal action its right to exercise, and receive the securities purchasable upon exercise of, its warrants.

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LEGAL OWNERSHIP OF SECURITIES
We can issue securities in registered form or in the form of one or more global securities. We describe global securities in greater detail below. We refer to those persons who have securities registered in their own names on the books that we or any applicable trustee, depositary or warrant agent maintain for this purpose as the “holders” of those securities. These persons are the legal holders of the securities. We refer to those persons who, indirectly through others, own beneficial interests in securities that are not registered in their own names, as “indirect holders” of those securities. As we discuss below, indirect holders are not legal holders, and investors in securities issued in book-entry form or in street name will be indirect holders.
Book-Entry Holders
We may issue securities in book-entry form only, as we will specify in the applicable prospectus supplement. This means securities may be represented by one or more global securities registered in the name of a financial institution that holds them as depositary on behalf of other financial institutions that participate in the depositary’s book-entry system. These participating institutions, which are referred to as participants, in turn, hold beneficial interests in the securities on behalf of themselves or their customers.
Only the person in whose name a security is registered is recognized as the holder of that security. Global securities will be registered in the name of the depositary or its participants. Consequently, for global securities, we will recognize only the depositary as the holder of the securities, and we will make all payments on the securities to the depositary. The depositary passes along the payments it receives to its participants, which in turn pass the payments along to their customers who are the beneficial owners. The depositary and its participants do so under agreements they have made with one another or with their customers; they are not obligated to do so under the terms of the securities.
As a result, investors in a global security will not own securities directly. Instead, they will own beneficial interests in a global security, through a bank, broker or other financial institution that participates in the depositary’s book-entry system or holds an interest through a participant. As long as the securities are issued in global form, investors will be indirect holders, and not legal holders, of the securities.
Street Name Holders
We may terminate a global security or issue securities that are not issued in global form. In these cases, investors may choose to hold their securities in their own names or in “street name.” Securities held by an investor in street name would be registered in the name of a bank, broker or other financial institution that the investor chooses, and the investor would hold only a beneficial interest in those securities through an account he or she maintains at that institution.
For securities held in street name, we or any applicable trustee or depositary will recognize only the intermediary banks, brokers and other financial institutions in whose names the securities are registered as the holders of those securities, and we or any such trustee or depositary will make all payments on those securities to them. These institutions pass along the payments they receive to their customers who are the beneficial owners, but only because they agree to do so in their customer agreements or because they are legally required to do so. Investors who hold securities in street name will be indirect holders, not legal holders, of those securities.
Legal Holders
Our obligations, as well as the obligations of any applicable trustee or third party employed by us or a trustee, run only to the legal holders of the securities. We do not have obligations to investors who hold beneficial interests in global securities, in street name or by any other indirect means. This will be the case whether an investor chooses to be an indirect holder of a security or has no choice because we are issuing the securities only in global form.
For example, once we make a payment or give a notice to the holder, we have no further responsibility for the payment or notice even if that holder is required, under agreements with its participants or customers or by law, to pass it along to the indirect holders but does not do so. Similarly, we may want to obtain the approval of the holders to amend an indenture, to relieve us of the consequences of a default or of our

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obligation to comply with a particular provision of an indenture, or for other purposes. In such an event, we would seek approval only from the holders, and not the indirect holders, of the securities. Whether and how the legal holders contact the indirect holders is up to the legal holders.
Special Considerations for Indirect Holders
If you hold securities through a bank, broker or other financial institution, either in book-entry form because the securities are represented by one or more global securities or in street name, you should check with your own institution to find out:

how it handles securities payments and notices;

whether it imposes fees or charges;

how it would handle a request for the holders’ consent, if ever required;

whether and how you can instruct it to send you securities registered in your own name so you can be a holder, if that is permitted in the future;

how it would exercise rights under the securities if there were a default or other event triggering the need for holders to act to protect their interests; and

if the securities are in book-entry form, how the depositary’s rules and procedures will affect these matters.
Global Securities
A global security is a security that represents one or any other number of individual securities held by a depositary. Generally, all securities represented by the same global securities will have the same terms.
Each security issued in book-entry form will be represented by a global security that we issue to, deposit with and register in the name of a financial institution or its nominee that we select. The financial institution that we select for this purpose is called the depositary. Unless we specify otherwise in the applicable prospectus supplement, DTC will be the depositary for all securities issued in book-entry form.
A global security may not be transferred to or registered in the name of anyone other than the depositary, its nominee or a successor depositary, unless special termination situations arise. We describe those situations below under “— Special Situations When a Global Security Will Be Terminated.” As a result of these arrangements, the depositary, or its nominee, will be the sole registered owner and legal holder of all securities represented by a global security, and investors will be permitted to own only beneficial interests in a global security. Beneficial interests must be held by means of an account with a broker, bank or other financial institution that in turn has an account with the depositary or with another institution that does. Thus, an investor whose security is represented by a global security will not be a legal holder of the security, but only an indirect holder of a beneficial interest in the global security.
If the prospectus supplement for a particular security indicates that the security will be issued as a global security, then the security will be represented by a global security at all times unless and until the global security is terminated. If termination occurs, we may issue the securities through another book-entry clearing system or decide that the securities may no longer be held through any book-entry clearing system.
Special Considerations for Global Securities
As an indirect holder, an investor’s rights relating to a global security will be governed by the account rules of the investor’s financial institution and of the depositary, as well as general laws relating to securities transfers. We do not recognize an indirect holder as a holder of securities and instead deal only with the depositary that holds the global security.
If securities are issued only as global securities, an investor should be aware of the following:

an investor cannot cause the securities to be registered in his or her name, and cannot obtain non-global certificates for his or her interest in the securities, except in the special situations we describe below;

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an investor will be an indirect holder and must look to his or her own bank or broker for payments on the securities and protection of his or her legal rights relating to the securities, as we describe above;

an investor may not be able to sell interests in the securities to some insurance companies and to other institutions that are required by law to own their securities in non-book-entry form;

an investor may not be able to pledge his or her interest in the global security in circumstances where certificates representing the securities must be delivered to the lender or other beneficiary of the pledge in order for the pledge to be effective;

the depositary’s policies, which may change from time to time, will govern payments, transfers, exchanges and other matters relating to an investor’s interest in the global security;

we and any applicable trustee have no responsibility for any aspect of the depositary’s actions or for its records of ownership interests in the global security, nor will we or any applicable trustee supervise the depositary in any way;

the depositary may, and we understand that DTC will, require that those who purchase and sell interests in the global security within its book-entry system use immediately available funds, and your broker or bank may require you to do so as well; and

financial institutions that participate in the depositary’s book-entry system, and through which an investor holds its interest in the global security, may also have their own policies affecting payments, notices and other matters relating to the securities.
There may be more than one financial intermediary in the chain of ownership for an investor. We do not monitor and are not responsible for the actions of any of those intermediaries.
Special Situations When a Global Security Will Be Terminated
In a few special situations described below, a global security will terminate and interests in it will be exchanged for physical certificates representing those interests. After that exchange, the choice of whether to hold securities directly or in street name will be up to the investor. Investors must consult their own banks or brokers to find out how to have their interests in securities transferred to their own names, so that they will be direct holders. We have described the rights of holders and street name investors above.
Unless we provide otherwise in the applicable prospectus supplement, a global security will terminate when the following special situations occur:

if the depositary notifies us that it is unwilling, unable or no longer qualified to continue as depositary for that global security and we do not appoint another institution to act as depositary within 90 days;

if we notify any applicable trustee that we wish to terminate that global security; or

if an event of default has occurred with regard to securities represented by that global security and has not been cured or waived.
The applicable prospectus supplement may also list additional situations for terminating a global security that would apply only to the particular series of securities covered by the prospectus supplement. When a global security terminates, the depositary, and neither we nor any applicable trustee, is responsible for deciding the names of the institutions that will be the initial direct holders.

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PLAN OF DISTRIBUTION
We may sell the securities from time to time pursuant to underwritten public offerings, negotiated transactions, block trades or a combination of these methods. We may sell the securities to or through underwriters or dealers, through agents, or directly to one or more purchasers. We may distribute securities from time to time in one or more transactions:

at a fixed price or prices, which may be changed;

at market prices prevailing at the time of sale;

at prices related to such prevailing market prices; or

at negotiated prices.
We may also sell equity securities covered by this registration statement in an “at the market” offering as defined in Rule 415(a)(4) under the Securities Act. Such offering may be made into an existing trading market for such securities in transactions at other than a fixed price on or through the facilities of The Nasdaq Global Market or any other securities exchange or quotation or trading service on which such securities may be listed, quoted or traded at the time of sale. Such at the market offerings, if any, may be conducted by underwriters acting as principal or agent.
A prospectus supplement or supplements (and any related free writing prospectus that we may authorize to be provided to you) will describe the terms of the offering of the securities, including, to the extent applicable:

the name or names of any underwriters, dealers or agents, if any;

the purchase price of the securities and the proceeds we will receive from the sale;

any over-allotment options under which underwriters may purchase additional securities from us;

any agency fees or underwriting discounts and other items constituting agents’ or underwriters’ compensation;

any public offering price;

any discounts or concessions allowed or reallowed or paid to dealers; and

any securities exchange or market on which the securities may be listed.
Only underwriters named in the prospectus supplement are underwriters of the securities offered by the prospectus supplement.
If underwriters are used in the sale, they will acquire the securities for their own account and may resell the securities from time to time in one or more transactions at a fixed public offering price or at varying prices determined at the time of sale. The obligations of the underwriters to purchase the securities will be subject to the conditions set forth in the applicable underwriting agreement. We may offer the securities to the public through underwriting syndicates represented by managing underwriters or by underwriters without a syndicate. Subject to certain conditions, the underwriters will be obligated to purchase all of the securities offered by the prospectus supplement, other than securities covered by any overallotment or other option. Any public offering price and any discounts or concessions allowed or reallowed or paid to dealers may change from time to time. We may use underwriters with whom we have a material relationship. We will describe in the prospectus supplement, naming the underwriter, the nature of any such relationship.
We may sell securities directly or through agents we designate from time to time. We will name any agent involved in the offering and sale of securities, and we will describe any commissions we will pay the agent in the prospectus supplement. Unless the prospectus supplement states otherwise, our agent will act on a best-efforts basis for the period of its appointment.
We may authorize agents or underwriters to solicit offers by certain types of institutional investors to purchase securities from us at the public offering price set forth in the prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on a specified date in the future. We will

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describe the conditions to these contracts and the commissions we must pay for solicitation of these contracts in the prospectus supplement.
We may provide agents and underwriters with indemnification against civil liabilities related to this offering, including liabilities under the Securities Act, or contribution with respect to payments that the agents or underwriters may make with respect to these liabilities. Agents and underwriters may engage in transactions with, or perform services for, us in the ordinary course of business.
All securities we may offer, other than common stock, will be new issues of securities with no established trading market. Any underwriters may make a market in these securities, but will not be obligated to do so and may discontinue any market making at any time without notice. We cannot guarantee the liquidity of the trading markets for any securities.
Any underwriter may engage in overallotment, stabilizing transactions, short covering transactions and penalty bids. Overallotment involves sales in excess of the offering size, which create a short position. Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum. Short covering transactions involve purchases of the securities in the open market after the distribution is completed to cover short positions. Penalty bids permit the underwriters to reclaim a selling concession from a dealer when the securities originally sold by the dealer are purchased in a stabilizing or covering transaction to cover short positions. Those activities may cause the price of the securities to be higher than it would otherwise be. If commenced, the underwriters may discontinue any of the activities at any time. These transactions may be effected on any exchange or over-the-counter market or otherwise.
Any underwriters or agents who are qualified market makers on The Nasdaq Global Market may engage in passive market making transactions in the securities on The Nasdaq Global Market in accordance with Rule 103 of Regulation M under the Exchange Act, during the business day prior to the pricing of the offering, before the commencement of offers or sales of the securities. Passive market makers must comply with applicable volume and price limitations and must be identified as passive market makers. In general, a passive market maker must display its bid at a price not in excess of the highest independent bid for such security; if all independent bids are lowered below the passive market maker’s bid, however, the passive market maker’s bid must then be lowered when certain purchase limits are exceeded. Passive market making may stabilize the market price of the securities at a level above that which might otherwise prevail in the open market and, if commenced, may be discontinued at any time.

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LEGAL MATTERS
Unless otherwise indicated in the applicable prospectus supplement, certain legal matters in connection with the offering and the validity of the securities offered by this prospectus, and any supplement thereto, will be passed upon by Cooley LLP, New York, New York. Additional legal matters may be passed upon for us or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.
EXPERTS
Marcum LLP, independent registered public accounting firm, has audited our consolidated financial statements as of and for the years ended December 31, 2020 and 2019, as set forth in its report included in our 2020 Annual Report on Form 10-K. Our 2020 and 2019 financial statements are incorporated by reference in reliance on Marcum LLP’s report, given on their authority as experts in accounting and auditing.
WHERE YOU CAN FIND MORE INFORMATION
This prospectus is part of a registration statement we filed with the SEC. This prospectus does not contain all of the information set forth in the registration statement and the exhibits to the registration statement. For further information with respect to us and the securities we are offering under this prospectus, we refer you to the registration statement and the exhibits and schedules filed as a part of the registration statement. You should rely only on the information contained in this prospectus or incorporated by reference in this prospectus. We have not authorized anyone else to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information in this prospectus is accurate as of any date other than the date on the front page of this prospectus, regardless of the time of delivery of this prospectus or any sale of the securities offered by this prospectus.
We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a website at http://www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers, such as us, that file electronically with the SEC.
Copies of certain information filed by us with the SEC are also available on our website at http://www.markertherapeutics.com. Information contained in or accessible through our website does not constitute a part of this prospectus and is not incorporated by reference in this prospectus. We have included our website address as an inactive textual reference only.

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
The SEC allows us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The SEC file number for the documents incorporated by reference in this prospectus is 001-37939. The documents incorporated by reference into this prospectus contain important information that you should read about us.
The following documents are incorporated by reference into this document:



our Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2021 and June 30, 2021, filed with the SEC on May 12, 2021 and August 10, 2021, respectively;

our Current Reports on Form 8-K filed with the SEC on March 16, 2021 and June 11, 2021; and

We also incorporate by reference into this prospectus all documents (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits filed on such form that are related to such items) that are filed by us with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (i) after the date of the initial filing of the registration statement of which this prospectus forms a part and prior to effectiveness of the registration statement, or (ii) after the date of this prospectus but prior to the termination of the offering. These documents include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, as well as proxy statements.
We will provide to each person, including any beneficial owner, to whom a prospectus is delivered, without charge upon written or oral request, a copy of any or all of the documents that are incorporated by reference into this prospectus but not delivered with the prospectus, including exhibits that are specifically incorporated by reference into such documents. You should direct any requests for documents to Marker Therapeutics, Inc., Attn: Corporate Secretary, 3200 Southwest Freeway, Suite 2500, Houston, Texas 77027, and our telephone number is (713) 400-6400.
Any statement contained in this prospectus or contained in a document incorporated or deemed to be incorporated by reference into this prospectus will be deemed to be modified or superseded to the extent that a statement contained in this prospectus or any subsequently filed supplement to this prospectus, or document deemed to be incorporated by reference into this prospectus, modifies or supersedes such statement.

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The information in this prospectus is not complete and may be changed. We may not sell these securities or accept an offer to buy these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities, and it is not soliciting offers to buy these securities in any state where such offer or sale is not permitted.
SUBJECT TO COMPLETION, DATED AUGUST 10, 2021
PROSPECTUS
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$75,000,000
Common Stock
This sales agreement prospectus relates to the issuance and sale of shares of our common stock having an aggregate offering price of up to $75.0 million from time to time through our sales agents, Cantor Fitzgerald & Co. and RBC Capital Markets, LLC, or the Sales Agents. These sales, if any, will be made pursuant to the terms of the Controlled Equity OfferingSM Sales Agreement, or the Sales Agreement, among us and the Sales Agents, dated August 10, 2021, which is filed with the Securities and Exchange Commission as an exhibit to the Registration Statement of which this prospectus is part.
Our common stock is traded on The Nasdaq Global Market under the symbol “MRKR.” On August 6, 2021, the last reported sale price of our common stock was $2.07 per share.
Sales of shares of our common stock under this prospectus, if any, may be made by any method deemed to be an “at the market offering” as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended, or the Securities Act. The Sales Agents are not required to sell any specific number or dollar amount of shares of our common stock. Each of the Sales Agents has agreed to use its commercially reasonable efforts to sell on our behalf all of the shares of common stock requested to be sold by us, consistent with its normal trading and sales practices, on mutually agreed terms among the Sales Agents and us. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.
The Sales Agents will be entitled to compensation under the terms of the Sales Agreement at a commission rate equal to 3.0% of the gross sales price per share sold. The net proceeds from any sales under this prospectus will be used as described under the section entitled “Use of Proceeds.” See “Plan of Distribution” for additional information regarding compensation to be paid to the Sales Agents. The proceeds we receive from sales of our common stock, if any, will depend on the number of shares actually sold and the offering price of such shares.
In connection with the sale of common stock on our behalf, each of the Sales Agents will be deemed to be an “underwriter” within the meaning of the Securities Act, and the compensation of the Sales Agents will be deemed to be underwriting commissions or discounts. We have agreed to provide indemnification and contribution to the Sales Agents with respect to certain liabilities, including liabilities under the Securities Act.
Investing in our securities involves a high degree of risk. You should review carefully the risks and uncertainties described under the heading “Risk Factors” beginning on page S-5 of this prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus.
NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
CantorRBC Capital Markets
The date of this prospectus is           , 2021.

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ABOUT THIS PROSPECTUS
This prospectus relates to part of a registration statement on Form S-3 that we have filed with the Securities and Exchange Commission, or SEC, utilizing a “shelf” registration process. Under this shelf registration process, we may sell any combination of the securities described in our base prospectus included in the shelf registration statement in one or more offerings up to a total aggregate offering price of $300,000,000. The $75,000,000 of common stock that may be offered, issued and sold under this prospectus is included in the $300,000,000 of securities that may be offered, issued and sold by us pursuant to our shelf registration statement. In connection with such offers and when accompanied by the base prospectus included in the registration statement of which this prospectus forms a part, this prospectus will be deemed a prospectus supplement to such base prospectus.
This prospectus relates to the offering of our common stock. Before buying any of the common stock that we are offering, we urge you to carefully read this prospectus, together with the information incorporated by reference as described under the headings “Where You Can Find More Information” and “Incorporation of Certain Information by Reference” in this prospectus. These documents contain important information that you should consider when making your investment decision.
This prospectus describes the terms of this offering of common stock and also adds to and updates information contained in the documents incorporated by reference into this prospectus. To the extent there is a conflict between the information contained in this prospectus, on the one hand, and the information contained in any document incorporated by reference into this prospectus that was filed with the SEC before the date of this prospectus, on the other hand, you should rely on the information in this prospectus. If any statement in one of these documents is inconsistent with a statement in another document having a later date (for example, a document incorporated by reference into this prospectus) the statement in the document having the later date modifies or supersedes the earlier statement.
You should rely only on the information contained in or incorporated by reference in this prospectus and in any free writing prospectus that we have authorized for use in connection with this offering. We have not, and the Sales Agents have not, authorized anyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not, and the Sales Agents are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus, the documents incorporated by reference in this prospectus, and in any free writing prospectus that we have authorized for use in connection with this offering, is accurate only as of the date of those respective documents. Our business, financial condition, results of operations and prospects may have changed since those dates. You should read this prospectus, the documents incorporated by reference in this prospectus, and any free writing prospectus that we have authorized for use in connection with this offering, in their entirety before making an investment decision.
This prospectus and the information incorporated herein by reference contain summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been filed, will be filed or will be incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described below under the heading “Where You Can Find More Information.”

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SUMMARY
This following summary highlights information about us, this offering and selected information contained elsewhere in or incorporated by reference into this prospectus. This summary is not complete and does not contain all of the information that you should consider before deciding whether to invest in our common stock. For a more complete understanding of our company and this offering, we encourage you to read and consider carefully the more detailed information in this prospectus, including the information incorporated by reference in this prospectus, and the information included in any free writing prospectus that we have authorized for use in connection with this offering, including the information under the heading “Risk Factors” in this prospectus on page S-5 and in the documents incorporated by reference into this prospectus.
Unless the context indicates otherwise, as used in this prospectus, references to “we,” “us,” “our,” “the company” and “Marker Therapeutics” refer to Marker Therapeutics, Inc., formerly known as TapImmune, Inc., and its subsidiaries. We own various U.S. federal trademark applications and unregistered trademarks, including our company name. All other trademarks or trade names referred to in this prospectus are the property of their respective owners. Solely for convenience, the trademarks and trade names in this prospectus are referred to without the symbols ® and ™, but such references should not be construed as any indication that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto.
Overview
We are a clinical-stage immuno-oncology company specializing in the development and commercialization of novel T cell-based immunotherapies and innovative peptide-based vaccines for the treatment of hematological malignancies and solid tumor indications. We developed our lead product candidates from our MultiTAA-specific T cell technology, which is based on the selective expansion of non-engineered, tumor-specific T cells that recognize tumor associated antigens, or TAAs, which are tumor targets, and then kill tumor cells expressing those targets. These T cells are designed to recognize multiple tumor targets to produce broad spectrum anti-tumor activity. We are advancing two pipelines of product candidates as part of our MultiTAA-specific T cell program: the autologous T cells for the treatment of lymphoma, multiple myeloma, or MM, and selected solid tumors and the allogeneic T cells for the treatment of acute myeloid leukemia, or AML, and acute lymphoblastic leukemia, or ALL. Because we do not genetically engineer the MultiTAA-specific T cell therapies, we believe that our product candidates are easier and less expensive to manufacture, have lower toxicities than current engineered chimeric antigen receptor, or CAR-T, and T cell receptor-based therapies and may provide patients with meaningful clinical benefit. We are also developing innovative peptide-based immunotherapeutic vaccines for the treatment of metastatic solid tumors.
We are pursuing post-transplant AML as the lead indication for our first company-sponsored MultiTAA-specific T cell program. In April 2020, the U.S. Food and Drug Administration granted orphan drug designation to MT-401 for the treatment of AML after receiving an allogeneic stem cell transplant. The MultiTAA-specific T cell therapy has been well tolerated in an ongoing Phase 1 clinical trial in AML and myelodysplastic syndrome, or MDS, conducted by our strategic partner Baylor College of Medicine, or BCM. As reported in a recent publication by Lulla et al., 11 of the 17 patients in the adjuvant disease setting dosed with the MultiTAA-specific T cell therapy after receiving an allogeneic hematopoietic stem cell transplant, or HSCT, never relapsed [median leukemia-free survival, or LFS, not reached at a median follow-up of 1.9 years], with 11 of 15 patients remaining alive (estimated two-year overall survival of 77%) at a median follow-up of 1.9 years post-infusion, which compares favorably with HSCT outcomes for risk-matched AML/MDS patients post-HSCT [median LFS of nine to 15 months and two-year survival probability of 42%]. Additionally, eight patients were treated for active disease that was resistant to salvage therapy post-HSCT with a median of five prior lines of therapy (range: four to 10). One of the eight patients crossed over from the adjuvant group, while two patients enrolled twice, but all three patients had active AML that failed another line of salvage therapy after their first MultiTAA-specific T cell infusion. Two of the eight patients achieved objective responses, with one complete response and one partial response, with six patients continuing with stable disease.
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we refer to as MT-401 (zedenoleucel), in post-allogeneic HSCT patients with AML in both the adjuvant and active disease setting. The dose administered in this multicenter trial is currently 100 million cells every two weeks for three doses. In the adjuvant setting, patients will be randomized to either MultiTAA-specific T cell therapy at approximately 90 days post-transplant versus standard of care observation, while the active disease patients will receive MT-401 following relapse post-transplant as part of a single-arm group. We have completed the safety lead-in portion of the trial in June 2021. We initiated the remainder of the Phase 2 trial in July 2021 and plan to complete enrollment of approximately 20 patients and activate additional clinical sites across the United States in the fourth quarter of 2021 in order to report results from the active disease arm of the trial in the first quarter of 2022. We expect to begin manufacturing MT-401 for the Phase 2 trial at our cGMP manufacturing facility in the third quarter of 2021.
We reported interim data for an ongoing Phase 1/2 clinical trial of the MultiTAA-specific T cell therapy for the treatment of pancreatic adenocarcinoma being conducted by BCM. In this trial, we have observed a clinical benefit correlated with the post-infusion detection of tumor-reactive T cells in patient peripheral blood and within tumor biopsy samples in patients in the tumor-resection arm of the trial. These T cells exhibited activity against both targeted antigens and non-targeted TAAs, indicating induction of antigen spreading. To date, we have not observed any cytokine release syndrome or neurotoxicity in this trial.
We are also evaluating the MultiTAA-specific T cell therapies in a Phase 2 clinical trial for the treatment of breast cancer and in Phase 1 clinical trials for the treatment of ALL, lymphoma, MM and sarcoma, all of which are being conducted by BCM. As of June 2021, the MultiTAA-specific T cell therapies have been generally well tolerated by all of the patients enrolled in clinical trials in hematological and solid tumor indications with no incidents of cytokine release syndrome or neurotoxicity, which are frequently associated with CAR-T therapies. Our ongoing clinical trials may be also affected by the COVID-19 pandemic. Based on our observations in clinical trials in AML, pancreatic cancer, lymphoma, ALL and MM, we believe that the MultiTAA-specific T cell therapies have the potential to mediate a meaningful anti-tumor effect, as well as significant in vivo expansion of T cells. We may initiate additional clinical trials investigating other indications in addition to our planned Phase 2 trial in post-transplant AML patients.
Pipeline
Our clinical-stage pipeline, including clinical trials being conducted by BCM, is set forth below.
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Corporate Information
We were incorporated under the laws of the State of Nevada in 1991 under the name “TapImmune, Inc.” and reincorporated in Delaware in October 2018 under the name “Marker Therapeutics, Inc.” On October 17, 2018, we completed a business combination with a Delaware corporation that was then known as “Marker Therapeutics, Inc.,” or Private Marker, in accordance with the terms of the Agreement and Plan of Merger and Reorganization dated as of May 15, 2018, or the Merger Agreement, by and among us, Private Marker and Timberwolf Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of TapImmune, or Merger Sub, pursuant to which, among other matters, Merger Sub merged with and into Private Marker, with Private Marker continuing as a wholly owned subsidiary of TapImmune and the surviving corporation of the merger. In connection with the merger, we changed our name from “TapImmune,

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Inc.” to “Marker Therapeutics, Inc.” and Private Marker changed its name to “Marker Cell Therapy, Inc.” and became our wholly owned subsidiary. Our principal executive offices are located at 3200 Southwest Freeway, Suite 2500, Houston, Texas 77027, and our telephone number is (713) 400-6400. Our website is located at http://www.markertherapeutics.com. We do not incorporate by reference into this prospectus the information on, or accessible through, our website, and you should not consider it as part of this prospectus. We have included our website address as an inactive textual reference only.
Implications of Being a Smaller Reporting Company
We are a “smaller reporting company” as defined in Rule 12b-2 promulgated under the Securities Exchange Act of 1934, as amended, or the Exchange Act. We may remain a smaller reporting company until we have a non-affiliate public float in excess of $250 million and annual revenues in excess of $100 million, or a non-affiliate public float in excess of $700 million, each as determined on an annual basis. A smaller reporting company may take advantage of relief from some of the reporting requirements and other burdens that are otherwise applicable generally to public companies. These provisions include:

being permitted to provide only two years of audited financial statements, in addition to any required unaudited interim financial statements, with correspondingly reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure;

not being required to comply with the auditor attestation requirements in the assessment of our internal control over financial reporting; and

reduced disclosure obligations regarding executive compensation in our periodic reports, proxy statements and registration statements.

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THE OFFERING
Common stock offered by us
Shares of our common stock having an aggregate offering price of up to $75,000,000.
Common stock to be outstanding after this offering
Up to 119,310,559 shares, assuming sales of 36,231,884 shares of our common stock in this offering at an offering price of $2.07 per share, the last reported sale price of our common stock on The Nasdaq Global Market on August 6, 2021. The actual number of shares issued will vary depending on the sales price under this offering.
Manner of offering
“At the market offering” that may be made from time to time through our Sales Agents. See “Plan of Distribution” on page S-16.
Use of proceeds
We currently intend to use the net proceeds from this offering primarily to fund the research and development of our product candidates, to fund our manufacturing activities and for working capital and general corporate purposes. We may also use a portion of the net proceeds to invest in or acquire businesses or technologies that we believe are complementary to our own, although we have no current plans, commitments or agreements with respect to any acquisitions as of the date of this prospectus. See “Use of Proceeds.”
Risk factors
You should read the “Risk Factors” section of this prospectus and in the documents incorporated by reference herein for a discussion of factors to consider carefully before deciding to invest in shares of our common stock.
Nasdaq Global Market symbol
“MRKR”
The number of shares of our common stock that will be outstanding after this offering is based on 83,078,675 shares of our common stock outstanding as of June 30, 2021, and excludes:

7,460,777 shares of our common stock issuable upon the exercise of stock options outstanding as of June 30, 2021, at a weighted-average exercise price of $5.59 per share;

20,830,000 shares of our common stock issuable upon the exercise of warrants outstanding as of June 30, 2021, at a weighted-average exercise price of $4.47 per share; and

3,162,164 shares of our common stock reserved for future issuance under our 2020 Equity Incentive Plan.
Unless otherwise indicated, all information in this prospectus assumes no exercise of the outstanding options and warrants described above, and reflects an assumed public offering price of $2.07 per share, the last reported sale price of our common stock on The Nasdaq Global Market on August 6, 2021.

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RISK FACTORS
Investing in our common stock involves a high degree of risk. Before you decide to invest in our common stock, you should carefully consider the risks and uncertainties described below together with all other information contained in this prospectus and in our filings with the SEC that we have incorporated by reference into this prospectus. See the sections of this prospectus entitled “Where You Can Find More Information” and “Incorporation of Certain Information by Reference.” If any of the following risks actually occurs, our business, prospects, operating results and financial condition could suffer materially. In such event, the trading price of our common stock could decline and you might lose all or part of your investment.
Additional Risks Related to This Offering
We have broad discretion over the use of our cash, cash equivalents and marketable securities, including the net proceeds we receive in this offering, and may not use them effectively.
Our management has broad discretion to use our cash and cash equivalents, including the net proceeds we receive in this offering, to fund our operations and could spend these funds in ways that do not improve our results of operations or enhance the value of our common stock. The failure by our management to apply these funds effectively could result in financial losses that could have an adverse effect on our business, cause the price of our common stock to decline and delay the development of our product candidates. Pending their use to fund operations, we may invest our cash, cash equivalents and marketable securities in a manner that does not produce income or that loses value. See “Use of Proceeds.”
If you purchase shares of our common stock in this offering, you may suffer immediate dilution of your investment.
The offering price per share in this offering may exceed the net tangible book value per share of our common stock outstanding prior to this offering. Assuming that an aggregate of 36,231,884 shares of our common stock are sold at a price of $2.07 per share, the last reported sale price of our common stock on The Nasdaq Global Market on August 6, 2021, for aggregate gross proceeds of $75.0 million, and after deducting commissions and estimated aggregate offering expenses payable by us, you would experience immediate dilution of $0.93 per share, representing the difference between our as adjusted net tangible book value per share as of June 30, 2021 after giving effect to this offering and the assumed offering price. See the section titled “Dilution” below for a more detailed illustration of the dilution you would incur if you participate in this offering. Because the sales of the shares offered hereby will be made directly into the market or in negotiated transactions, the prices at which we sell these shares will vary and these variations may be significant. Purchasers of the shares we sell, as well as our existing stockholders, will experience significant dilution if we sell shares at prices significantly below the price at which they invested.
Investors in this offering may experience future dilution.
In order to raise additional capital, we may in the future offer additional shares of our common stock or other securities convertible into, or exchangeable for, our common stock at prices that may not be the same as the price per share in this offering. We cannot assure you that we will be able to sell shares of our common stock or other related securities in any other offering at a price per share that is equal to or greater than the price per share paid by investors in this offering. If the price per share at which we sell additional shares of our common stock or related securities in future transactions is less than the price per share in this offering, investors who purchase our common stock in this offering will suffer dilution in their investment.
In addition, we have a significant number of stock options and warrants exercisable for shares of our common stock outstanding. To the extent that outstanding stock options or warrants have been or may be exercised, investors purchasing our common stock in this offering may experience further dilution in the future. Furthermore, a significant portion of our total outstanding shares are eligible to be sold into the market, which could cause the market price of our common stock to drop significantly, even if our business is doing well.

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After this offering, our executive officers and directors and their affiliates, if they choose to act together, will continue to have the ability to significantly influence all matters submitted to stockholders for approval.
Upon the completion of this offering, our executive officers, directors and stockholders who owned more than 5% of our outstanding common stock before this offering will beneficially own a significant percentage of our outstanding common stock. As a result, following this offering, if these stockholders were to choose to act together, they would be able to significantly influence all matters submitted to our stockholders for approval, as well as our management and affairs. For example, these persons, if they choose to act together, would significantly influence the election of directors and approval of any merger, consolidation or sale of all or substantially all of our assets. This concentration of ownership control may delay, defer or prevent a change in control of our company, entrench our management and board of directors, or impede a merger, consolidation, takeover or other business combination involving us that other stockholders may desire.
An active trading market for our common stock may not be sustained following this offering.
Although our common stock is listed on The Nasdaq Global Market, an active trading market for our shares may not be sustained. If an active market for our common stock does not continue, it may be difficult for you to sell your shares, including shares you may purchase in this offering, without depressing the market price for the shares or sell your shares at all. Any inactive trading market for our common stock may also impair our ability to raise capital to continue to fund our operations by selling shares and may impair our ability to acquire other companies or technologies by using our shares as consideration.
The common stock offered hereby will be sold in “at the market offerings,” and investors who buy shares at different times will likely pay different prices.
Investors who purchase shares in this offering at different times will likely pay different prices, and so may experience different outcomes in their investment results. We will have discretion, subject to market demand, to vary the timing, prices, and numbers of shares sold, and there is no minimum or maximum sales price. Investors may experience a decline in the value of their shares as a result of share sales made at prices lower than the prices they paid.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus and the documents incorporated by reference herein contain forward-looking statements. These are based on our management’s current beliefs, expectations and assumptions about future events, conditions and results and on information currently available to us. Discussions containing these forward-looking statements may be found, among other places, in the sections entitled “Business,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in the documents incorporated by reference herein.
Any statements in this prospectus, or incorporated herein, about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical facts and are forward-looking statements. Within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act, these forward-looking statements include statements regarding:

the timing, progress and results of clinical trials of MultiTAA-specific T cell therapies and our other product candidates, including statements regarding the timing of initiation and completion of preclinical studies or clinical trials or related preparatory work, the period during which the results of the trials will become available and our research and development programs;

the timing of any submission of filings for regulatory approval of product candidates and our ability to obtain and maintain regulatory approvals for product candidates for any indication;

our ability to successfully commercialize our product candidates;

our expectations regarding the potential benefits, activity, effectiveness and safety of our product candidates;

our expectations regarding the size of the patient populations, market acceptance and opportunity for and clinical utility of product candidates, if approved for commercial use;

our manufacturing capabilities and strategy, including the, ease, scalability and commercial viability of our manufacturing methods and processes;

our expectations regarding the scope of any approved indications for product candidates;

the potential benefits of and our ability to maintain our relationships and collaborations with BCM and other potential collaboration or strategic relationships;

our ability to use the MultiTAA-specific T cell platform to develop future product candidates;

our estimates of our expenses, ongoing losses, future revenue, capital requirements and our needs for or ability to obtain additional funding;

our ability to identify, recruit and retain key personnel;

our ability to protect and enforce our intellectual property position for our product candidates, and the scope of such protection;

our financial performance;

our expected use of proceeds from this offering;

our competitive position and the development of and projections relating to our competitors or our industry; and

the impact of laws and regulations.
In some cases, you can identify forward-looking statements by the words “may,” “might,” “can,” “will,” “to be,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “objective,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “likely,” “continue” and “ongoing,” or the negative of these terms, or other comparable terminology intended to identify statements about the future, although not all forward-looking statements contain these words. These statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements.

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You should refer to the “Risk Factors” section contained in this prospectus and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus, for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. Given these risks, uncertainties and other factors, many of which are beyond our control, we cannot assure you that the forward-looking statements in this prospectus will prove to be accurate, and you should not place undue reliance on these forward-looking statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all.
Except as required by law, we assume no obligation to update these forward-looking statements publicly, or to revise any forward-looking statements to reflect events or developments occurring after the date of this prospectus, even if new information becomes available in the future.

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USE OF PROCEEDS
We may issue and sell shares of our common stock having aggregate sales proceeds of up to $75.0 million from time to time. Because there is no minimum offering amount required as a condition to close this offering, the actual total public offering amount, commissions and proceeds to us, if any, are not determinable at this time. There can be no assurance that we will sell any shares under or fully utilize the Sales Agreement as a source of financing.
We currently intend to use the net proceeds from this offering primarily to fund the research and development of our product candidates, to fund our manufacturing activities and for working capital and general corporate purposes. We may also use a portion of the net proceeds to invest in or acquire businesses or technologies that we believe are complementary to our own, although we have no current plans, commitments or agreements with respect to any acquisitions as of the date of this prospectus. Pending these uses, we intend to invest the net proceeds in investment-grade, interest-bearing securities.

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DILUTION
If you invest in our common stock in this offering, your ownership interest will be diluted immediately to the extent of the difference between the public offering price per share you will pay in this offering and the as adjusted net tangible book value per share of our common stock after this offering.
Our historical net tangible book value as of June 30, 2021 was $63.2 million, or $0.76 per share of common stock. Historical net tangible book value per share represents the amount of our total tangible assets less total liabilities, divided by the 83,078,675 shares of our common stock outstanding on June 30, 2021.
After giving effect to the issuance and sale of our common stock in the aggregate amount of $75.0 million in this offering at an assumed offering price of $2.07 per share, the last reported sale price of our common stock on The Nasdaq Global Market on August 6, 2021, and after deducting commissions and estimated aggregate offering expenses payable by us, our as adjusted net tangible book value as of June 30, 2021 would have been $135.7 million, or $1.14 per share. This represents an immediate increase of $0.38 in the as adjusted net tangible book value per share to existing stockholders and immediate dilution of $0.93 in the as adjusted net tangible book value per share to new investors purchasing common stock in this offering. Dilution per share to new investors is determined by subtracting as adjusted net tangible book value per share after this offering from the assumed public offering price of $2.07 per share. The following table illustrates this per share dilution to the new investors purchasing shares of our common stock in this offering:
Assumed public offering price per share$2.07
Historical net tangible book value per share as of June 30, 2021$0.76
Increase in as adjusted net tangible book value per share attributable to this offering0.38
As adjusted net tangible book value per share after this offering1.14
Dilution per share to new investors in this offering$0.93
The information discussed above is based on 83,078,675 shares of our common stock outstanding as of June 30, 2021 and excludes:

7,460,777 shares of our common stock issuable upon the exercise of stock options outstanding as of June 30, 2021, at a weighted-average exercise price of $5.59 per share;

20,830,000 shares of our common stock issuable upon the exercise of warrants outstanding as of June 30, 2021, at a weighted-average exercise price of $4.47 per share; and

3,162,164 shares of our common stock reserved for future issuance under our 2020 Equity Incentive Plan.
The table above assumes for illustrative purposes that an aggregate of 36,231,884 shares of our common stock are sold during the term of the Sales Agreement at a price of $2.07 per share, the last reported sale price of our common stock on The Nasdaq Global Market on August 6, 2021, for aggregate gross proceeds of $75.0 million. The shares subject to the Sales Agreement are being sold from time to time at various prices. An increase of $1.00 per share in the price at which the shares are sold from the assumed offering price of $2.07 per share shown in the table above, assuming all of our common stock in the aggregate amount of $75.0 million during the term of the Sales Agreement is sold at that price, would increase our adjusted net tangible book value per share after the offering to $1.26 per share and would increase the dilution in net tangible book value per share to new investors in this offering to $1.81 per share, after deducting commissions and estimated aggregate offering expenses payable by us. A decrease of $1.00 per share in the price at which the shares are sold from the assumed offering price of $2.07 per share shown in the table above, assuming all of our common stock in the aggregate amount of $75.0 million during the term of the Sales Agreement is sold at that price, would decrease our adjusted net tangible book value per share after the offering to $0.89 per share and would decrease the dilution in net tangible book value per share to new investors in this offering to $0.18 per share, after deducting commissions and estimated offering expenses payable by us. This information is supplied for illustrative purposes only.
To the extent that outstanding options or warrants are exercised or we issue additional options, warrants or shares of our common stock in the future, there will be further dilution to investors purchasing

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common stock in this offering. In addition, we may choose to raise additional capital due to market conditions or strategic considerations even if we believe we have sufficient funds for our current or future operating plans. To the extent that additional capital is raised through the sale of equity or convertible debt securities, the issuance of these securities could result in further dilution to our stockholders.

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DESCRIPTION OF CAPITAL STOCK
The following description of our capital stock and provisions of our certificate of incorporation and bylaws are summaries. You should also refer to the certificate of incorporation and the bylaws, which are filed as exhibits to the registration statement of which this prospectus is part.
General
Our certificate of incorporation authorizes us to issue up to 150,000,000 shares of common stock, $0.001 par value per share, and 5,000,000 shares of preferred stock, $0.001 par value per share. Our board of directors may establish the rights and preferences of the preferred stock from time to time. As of June 30, 2021, we had outstanding 83,078,675 shares of common stock and no shares of preferred stock outstanding.
Common Stock
Voting Rights
Holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders and do not have cumulative voting rights. As a result, the holders of a plurality of the shares of common stock entitled to vote in any election of directors can elect all of the directors standing for election, if they should so choose. All other matters to be voted on by our stockholders must be approved by a majority of the votes cast on the matter unless otherwise provided by law, our certificate of incorporation or our bylaws.
Dividends
Holders of common stock are entitled to receive ratably any dividends as may be declared by our board of directors, subject to any preferential dividend rights of any series of preferred stock that our board of directors may designate and issue in the future.
Liquidation
In the event of our liquidation, dissolution or winding up, the holders of common stock are entitled to receive ratably our net assets available for distribution to stockholders after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock.
Rights and Preferences
Holders of common stock have no preemptive, subscription, redemption or conversion rights. There are no redemption or sinking fund provisions applicable to the common stock. The rights, preferences and privileges of holders of common stock are subject to and may be adversely affected by the rights of the holders of shares of any series of preferred stock that our board of directors may designate and issue in the future.
Preferred Stock
Pursuant to our certificate of incorporation, our board of directors has the authority, without further action by our stockholders, from time to time, to designate and issue up to 5,000,000 shares of preferred stock in one or more series. Our board of directors may determine the rights, preferences and limitations of each series, including voting rights, dividend rights and redemption and liquidation preferences. Satisfaction of any dividend preferences of outstanding shares of preferred stock would reduce the amount of funds available for the payment of dividends on shares of our common stock. Holders of shares of preferred stock may be entitled to receive a preference payment in the event of any liquidation, dissolution or winding-up of our company before any payment is made to the holders of shares of our common stock. In some circumstances, the issuance of shares of preferred stock may render more difficult or tend to discourage a merger, tender offer or proxy contest, the assumption of control by a holder of a large block of our securities or the removal of incumbent management. Upon the affirmative vote of our board of

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directors, without stockholder approval, we may issue shares of preferred stock with voting and conversion rights which could adversely affect the holders of shares of our common stock.
Our board of directors will fix the designations, voting powers, preferences and rights of each series, as well as the qualifications, limitations or restrictions thereof, of the preferred stock of each series that we offer under this prospectus and applicable prospectus supplements in the certificate of designation relating to that series. We will file as an exhibit to the registration statement of which this prospectus is a part, or will incorporate by reference from reports that we file with the SEC, the form of any certificate of designation that describes the terms of the series of preferred stock we are offering before the issuance of that series of preferred stock. This description will include:

the title and stated value;

the number of shares we are offering;

the liquidation preference per share;

the purchase price per share;

the dividend rate per share, dividend period and payment dates and method of calculation for dividends;

whether dividends will be cumulative or non-cumulative and, if cumulative, the date from which dividends will accumulate;

our right, if any, to defer payment of dividends and the maximum length of any such deferral period;

the procedures for any auction and remarketing, if any;

the provisions for a sinking fund, if any;

the provisions for redemption or repurchase, if applicable, and any restrictions on our ability to exercise those redemption and repurchase rights;

any listing of the preferred stock on any securities exchange or market;

whether the preferred stock will be convertible into our common stock or other securities of ours, including depositary shares and warrants, and, if applicable, the conversion period, the conversion price, or how it will be calculated, and under what circumstances it may be adjusted;

whether the preferred stock will be exchangeable into debt securities, and, if applicable, the exchange period, the exchange price, or how it will be calculated, and under what circumstances it may be adjusted;

voting rights, if any, of the preferred stock;

preemption rights, if any;

restrictions on transfer, sale or other assignment, if any;

whether interests in the preferred stock will be represented by depositary shares;

a discussion of any material or special U.S. federal income tax considerations applicable to the preferred stock;

the relative ranking and preferences of the preferred stock as to dividend rights and rights if we liquidate, dissolve or wind up our affairs;

any limitations on issuances of any class or series of preferred stock ranking senior to or on a parity with the series of preferred stock being issued as to dividend rights and rights if we liquidate, dissolve or wind up our affairs; and

any other specific terms, rights, preferences, privileges, qualifications or restrictions of the preferred stock.
The General Corporation Law of the State of Delaware, or DGCL, the state of our incorporation, provides that the holders of preferred stock will have the right to vote separately as a class (or, in some

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cases, as a series) on an amendment to our certificate of incorporation if the amendment would change the par value or, unless the certificate of incorporation provided otherwise, the number of authorized shares of the class or change the powers, preferences or special rights of the class or series so as to adversely affect the class or series, as the case may be. This right is in addition to any voting rights that may be provided for in the applicable certificate of designation.
The issuance of preferred stock could adversely affect the voting power of holders of common stock and reduce the likelihood that common stockholders will receive dividend payments and payments upon liquidation. The issuance could have the effect of decreasing the market price of the common stock. The issuance of preferred stock also could have the effect of delaying, deterring or preventing a change in control of us.
Anti-Takeover Provisions
Section 203 of the DGCL
We are subject to Section 203 of the DGCL, or Section 203, which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;

upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the voting stock outstanding, but not the outstanding voting stock owned by the interested stockholder, those shares owned (i) by persons who are directors and also officers and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting of the stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock that is not owned by the interested stockholder.
In general, Section 203 defines a “business combination” to include the following:

any merger or consolidation involving the corporation and the interested stockholder;

any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;

subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;

any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation beneficially owned by the interested stockholder; or

the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits by or through the corporation.
In general, Section 203 defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.
Certificate of Incorporation and Bylaws
Because our stockholders do not have cumulative voting rights, stockholders holding a plurality of the shares of our common stock outstanding will be able to elect all of our directors. Our bylaws also provide that directors may be removed by the stockholders upon the vote of a majority of the shares entitled to vote an election of directors, and if a director was elected by a voting group of stockholders, only stockholders

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from that voting group may vote to remove such director, and such vacancy may be filled only by the stockholders of that voting group. Furthermore, the authorized number of directors may be changed only by resolution of the board of directors, and vacancies and newly created directorships on the board of directors may, except as otherwise required by law or determined by the board, only be filled by a majority vote of the directors then serving on the board, even though less than a quorum.
Our bylaws provide that only a majority of the authorized directors on our board of directors, the chairman of the board or the chief executive officer to call a special meeting of stockholders. Our bylaws also provide that stockholders seeking to present proposals before a meeting of stockholders to nominate candidates for election as directors at a meeting of stockholders must provide timely advance notice in writing, and specify requirements as to the form and content of a stockholder’s notice.
The combination of these provisions may make it more difficult for our existing stockholders to replace our board of directors as well as for another party to obtain control of us by replacing our board of directors. Since our board of directors has the power to retain and discharge our officers, these provisions could also make it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated preferred stock makes it possible for our board of directors to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change our control.
These provisions are intended to enhance the likelihood of continued stability in the composition of our board of directors and its policies and to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to reduce our vulnerability to hostile takeovers and to discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender offers for our shares and may have the effect of delaying changes in our control or management. As a consequence, these provisions may also inhibit fluctuations in the market price of our stock that could result from actual or rumored takeover attempts. We believe that the benefits of these provisions, including increased protection of our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure our company, outweigh the disadvantages of discouraging takeover proposals, because negotiation of takeover proposals could result in an improvement of their terms.
Transfer Agent and Registrar
The transfer agent and registrar for our common stock is American Stock Transfer & Company, LLC, with offices at 6201 15th Avenue, Brooklyn, New York 11219. The transfer agent for any series of preferred stock that we may offer under this prospectus will be named and described in the prospectus supplement for that series.
Listing on Nasdaq
Our common stock is listed on The Nasdaq Global Market under the symbol “MRKR.”

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PLAN OF DISTRIBUTION
We have entered into a Controlled Equity OfferingSM sales agreement, or the sales agreement, with the Sales Agents, under which we may offer and sell up to $75,000,000 of shares of our common stock from time to time through the Sales Agents, acting as agents. Sales of the shares of common stock, if any, may be made at market prices by any method deemed to be an “at the market” offering as defined in Rule 415(a)(4) under the Securities Act, including, without limitation, sales made directly on The Nasdaq Global Market or any other existing trading market for our common stock.
We may instruct the Sales Agents not to sell our common stock if the sales cannot be effected at or above the price designated by us from time to time. We or the Sales Agents may suspend or terminate the offering of our common stock upon notice and subject to other conditions.
We will pay the Sales Agents commissions, in cash, for their services for acting as Sales Agents in the sale of our common stock. The aggregate compensation payable to the Sales Agents will be 3.0% of the gross sales price of shares sold pursuant to the Sales Agreement. We will also reimburse the Sales Agents up to $75,000 for their fees and expenses incurred in connection with the establishment of this offering program and $25,000 on each “Representation Date” as set forth in the Sales Agreement. In accordance with FINRA Rule 5110 these reimbursed fees and expenses are deemed sales compensation in connection with this offering. We estimate that the total expenses for the offering, excluding commissions and expense reimbursement payable to the Sales Agents under the terms of the sales agreement, will be approximately $250,000. Because there is no minimum offering amount required as a condition to this offering, the actual total public offering amount, commissions and proceeds to us, if any, are not determinable at this time.
Settlement for sales of shares of our common stock will occur on the second trading day following the date on which any sales are made (or such earlier day as is industry practice for regular-way trading), in return for payment of the net proceeds to us. Sales of our common stock as contemplated in this prospectus will be settled through the facilities of The Depository Trust Company or by such other means as we and the Sales Agents may agree upon. There is no arrangement for funds to be received in an escrow, trust or similar arrangement.
The Sales Agents will use their commercially reasonable efforts, consistent with their sales and trading practices, to solicit offers to purchase shares of our common stock under the terms and subject to the conditions set forth in the sales agreement. In connection with the sale of shares of our common stock on our behalf, each of the Sales Agents will be deemed to be an “underwriter” within the meaning of the Securities Act and the compensation of the Sales Agents may be deemed to be underwriting commissions or discounts. We have agreed to provide indemnification and contribution to the Sales Agents against certain civil liabilities, including liabilities under the Securities Act.
The offering pursuant to the sales agreement will terminate upon the earlier of (1) the sale of all shares of our common stock subject to the sales agreement or (2) the termination of the sales agreement as permitted therein. We and the Sales Agents may each terminate the sales agreement at any time upon ten days’ prior notice.
The Sales Agents and their affiliates may in the future provide various investment banking, commercial banking and other financial services for us and our affiliates, for which services they may in the future receive customary fees. To the extent required by Regulation M, the Sales Agents will not engage in any market making activities involving our common stock while the offering is ongoing under this prospectus.
This prospectus and the accompanying base prospectus in electronic format may be made available on a website maintained by each of the Sales Agents and the Sales Agents may distribute this prospectus and the accompanying base prospectus electronically.
Our common stock is listed on The Nasdaq Global Market and trades under the symbol “MRKR.”
The transfer agent of our common stock is American Stock Transfer & Company, LLC.

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LEGAL MATTERS
The validity of the securities offered by this prospectus will be passed upon by Cooley LLP, New York, New York. Covington & Burling LLP, New York, New York, is counsel to Cantor Fitzgerald & Co. and RBC Capital Markets, LLC in connection with this offering.
EXPERTS
Marcum LLP, independent registered public accounting firm, has audited our consolidated financial statements as of and for the years ended December 31, 2020 and 2019, as set forth in its report included in our 2020 Annual Report on Form 10-K. Our 2020 and 2019 financial statements are incorporated by reference in reliance on Marcum LLP’s report, given on their authority as experts in accounting and auditing.
WHERE YOU CAN FIND MORE INFORMATION
This prospectus is part of a registration statement we filed with the SEC. This prospectus does not contain all of the information set forth in the registration statement and the exhibits to the registration statement. For further information with respect to us and the securities we are offering under this prospectus, we refer you to the registration statement and the exhibits and schedules filed as a part of the registration statement. You should rely only on the information contained in this prospectus or incorporated by reference in this prospectus. We have not authorized anyone else to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information in this prospectus is accurate as of any date other than the date on the front page of this prospectus, regardless of the time of delivery of this prospectus or any sale of the securities offered by this prospectus.
We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a website at http://www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers, such as us, that file electronically with the SEC.
Copies of certain information filed by us with the SEC are also available on our website at http://www.markertherapeutics.com. Information contained in or accessible through our website does not constitute a part of this prospectus and is not incorporated by reference in this prospectus. We have included our website address as an inactive textual reference only.

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
The SEC allows us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The SEC file number for the documents incorporated by reference in this prospectus is 001-37939. The documents incorporated by reference into this prospectus contain important information that you should read about us.
The following documents are incorporated by reference into this document:



our Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2021 and June 30, 2021, filed with the SEC on May 12, 2021 and August 10, 2021, respectively;

our Current Reports on Form 8-K filed with the SEC on March 16, 2021 and June 11, 2021; and

We also incorporate by reference into this prospectus all documents (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits filed on such form that are related to such items) that are filed by us with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (i) after the date of the initial filing of the registration statement of which this prospectus forms a part and prior to effectiveness of the registration statement, or (ii) after the date of this prospectus but prior to the termination of the offering. These documents include periodic reports, such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, as well as proxy statements.
We will provide to each person, including any beneficial owner, to whom a prospectus is delivered, without charge upon written or oral request, a copy of any or all of the documents that are incorporated by reference into this prospectus but not delivered with the prospectus, including exhibits that are specifically incorporated by reference into such documents. You should direct any requests for documents to Marker Therapeutics, Inc., Attn: Corporate Secretary, 3200 Southwest Freeway, Suite 2500, Houston, Texas 77027, and our telephone number is (713) 400-6400.
Any statement contained in this prospectus or contained in a document incorporated or deemed to be incorporated by reference into this prospectus will be deemed to be modified or superseded to the extent that a statement contained in this prospectus or any subsequently filed supplement to this prospectus, or document deemed to be incorporated by reference into this prospectus, modifies or supersedes such statement.

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$75,000,000
Common Stock
[MISSING IMAGE: lg_markertherapeutics-4clr.jpg]
PROSPECTUS
CantorRBC Capital Markets
          , 2021

TABLE OF CONTENTS

PART II

INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 14.OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

Item 14.
Other Expenses of Issuance and Distribution
The following table below itemizessets forth the expenses payable by the registrant in connection with the registrationestimated costs and issuance of the securities being registered hereunder,expenses, other than underwriting discounts and commissions. All amounts except the Securities and Exchange Commission registration fee are estimated.

Securities and Exchange Commission Registration Fee$1,142.87
Legal Fees and Expenses$25,000.00
Accountants’ Fees and Expenses$10,000.00
Transfer agent and registrar’s fees and expenses
Miscellaneous Expenses
Total

Estimated expenses are not presently known. The foregoing sets forth the general categories of expenses (other than underwriting discounts and commissions) that the Company anticipates it will incurcommissions, payable by us in connection with the offering of securities under the registration statement.

ITEM 15.INDEMNIFICATION OF DIRECTORS AND OFFICERS.

Our officers and directors are indemnified under Nevada law. Our Amended and Restated Articles of Incorporation and our By-laws are silent as to director and officer indemnification.

Nevada Revised Statute. The registrant is a Nevada corporation.

Section 78.138 of the Nevada Revised Statutes provides that a director or officer will notsecurities being registered. All the amounts shown are estimates, except for the SEC registration fee.

SEC registration fee$32,730
Accounting fees and expenses*
Legal fees and expenses*
Transfer agent fees and expenses*
Trustee fees and expenses*
Printing and miscellaneous expenses*
Total$*
*
These fees are calculated based on the securities offered and the number of issuances and, accordingly, cannot be personally liable toestimated at this time.
Item 15.
Indemnification of Officers and Directors
We are incorporated under the corporation and its stockholders unless it is proven that (i) the director's or officer's acts or omissions constituted a breach of his fiduciary duties, and (ii) such breach involved intentional misconduct, fraud or a knowing violationlaws of the law. The provisionsState of Delaware. Subsection (a) of Section 145 of the Nevada Revised Statutes with respect to limiting personal liability for directors and officers are self-executing and, to the extent the provisions of our Amended and Restated Articles of Incorporation and By-laws would be deemed to be inconsistent therewith, the provisionsGeneral Corporation Law of the Nevada Revised Statutes will control.

Section 78.7502State of Delaware, or the Nevada Revised Statutes permitsDGCL, empowers a corporation to indemnify any person who was or is a presentparty or formerwho is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or of another entity or enterprise for which such person is or was serving in such capacity at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person’s conduct was unlawful.

Subsection (b) of Section 145 empowers a corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action suit or proceeding, except an actionsuit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person acted in any of the capacities set forth above, against expenses including(including attorneys’ fees, judgments, fines and amounts paid in settlementfees) actually and reasonably incurred by the person in connection therewith, arising by reasonwith the defense or settlement of such person’s service in such capacityaction or suit if suchthe person (i) is not liable pursuant to Section 78.138 of the Nevada Revised Statutes, or (ii) acted in good faith and in a manner which he or shethe person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to a criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. In the case of actions brought by or in the right of the corporation, however,except that no indemnification mayshall be made forin respect of any claim, issue or matter as to which such person hasshall have been adjudged by a court of competent jurisdiction, after exhaustion of all appeals therefrom, to be liable to the corporation or for amounts paid in settlement to the corporation unless and only to the extent that the Court of Chancery or the court in which thesuch action or suit was brought or other court of competent jurisdiction determinesshall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses aswhich the Court of Chancery or such other court deemsshall deem proper.

Section 78.751 of145 further provides that to the Nevada Revised Statutes permits any discretionary indemnification under Section 78.7502 of the Nevada Revised Statutes, unless ordered by a court or advanced toextent a director or officer of a corporation has been successful on the merits or otherwise in the defense of any action, suit or proceeding referred to in subsections (a) and (b) of Section 145, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys’ fees) actually and reasonably incurred by such person in connection therewith; that indemnification provided for by Section 145 shall not be deemed exclusive of any other rights to which the indemnified party may be entitled; and the indemnification provided for by Section 145 shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director,

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officer, employee or agent and shall inure to the benefit of such person’s heirs, executors and administrators. Section 145 also empowers the corporation in accordance with the Nevada Revised Statutes, to be made bypurchase and maintain insurance on behalf of any person who is or was a corporation only as authorized in each specific case upon a determination that indemnification of the director, officer, employee or agent of the corporation, or is properor was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against such person and incurred by such person in any such capacity, or arising out of his status as such, whether or not the circumstances. Such determination mustcorporation would have the power to indemnify such person against such liabilities under Section 145.
Section 102(b)(7) of the DGCL provides that a corporation’s certificate of incorporation may contain a provision eliminating or limiting the personal liability of a director to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, provided that such provision shall not eliminate or limit the liability of a director (i) for any breach of the director’s duty of loyalty to the corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the DGCL or (iv) for any transaction from which the director derived an improper personal benefit.
Our bylaws provide that we will indemnify each person made, or threatened to be made, (1)a party to an action or proceeding by reason of the stockholders, (2) by the boardfact that he or she is or was a director or officer of directors by majority voteour company, or a director officer of a quorum consistingpredecessor corporation or of directors who were not parties toanother corporation if such person served in such position at our request, against all expenses incurred in defending a criminal or civil action, suit or proceeding. Such expenses will be paid by us in advance of the final disposition of such action, suit or proceeding (3)upon receipt of an undertaking by or on behalf of such director to repay any advanced amounts if it is ultimately determined that he or she is not entitled to indemnification as authorized by relevant section of the DGCL. We are not obligated to advance expenses to an agent who is a majority vote of a quorum consisting of directors who were not partiesparty to thean action, suit or proceeding so orders,brought by independent legal counselus and approved by a majority of our board of directors alleging willful misappropriate of corporate assets by such agent, disclosure of confidential information in violation of such agent’s fiduciary or contractual obligations to us or any other willful and deliberate breach in bad faith of such agent’s duty to us or our stockholders.
We have entered into indemnification agreements with each of our directors and officers. These indemnification agreements may require us, among other things, to indemnify our directors and officers for some expenses, including attorneys’ fees, judgments, fines and settlement amounts incurred by a director or officer in any action or proceeding arising out of his or her service as one of our directors or officers, or any of our subsidiaries or any other company or enterprise to which the person provides services at our request.
We maintain a general liability insurance policy that covers certain liabilities of directors and officers of our corporation arising out of claims based on acts or omissions in their capacities as directors or officers.
Pursuant to the terms of the Merger Agreement and subject to applicable law, from the effective time of the merger, or the Effective Time, through the sixth anniversary of the date on which the Effective Time occurs, we and TapImmune shall each jointly and severally indemnify and hold harmless each person who is, or has been at any time prior to the date thereof, or who became prior to the Effective Time, a director or officer of TapImmune or Private Marker, respectively, against all costs incurred in connection with any claim, action, suit, proceeding or investigation, whether civil, criminal, administrative or investigative, arising out of or pertaining to the fact that such person is or was a director or officer of TapImmune or Private Marker, whether asserted or claimed prior to, at or after the Effective Time, in each case, to the fullest extent permitted under the DGCL for directors or officers of Delaware corporations, provided that any such person to whom expenses are advanced provides an undertaking, as applicable, to the extent then required by the DGCL, to repay such advances if it is ultimately determined that such person is not entitled to indemnification.
Further, pursuant to the Merger Agreement, the provisions of our certificate of incorporation and our bylaws shall contain provisions no less favorable with respect to indemnification, advancement of expenses and exculpation of present and former directors and officers of each of TapImmune and Private Marker than were set forth in the certificate of incorporation and bylaws of TapImmune and Private Marker, as applicable, and such provisions shall not be amended, modified or repealed for a period of six years from

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the Effective Time in a written opinion,manner that would adversely affect the rights thereunder of individuals who, at or (4) if a quorum consisting of directors who were not partiesprior to the action, suitEffective Time, were officers or proceeding cannotdirectors of TapImmune or Private Marker.
We shall pay all expenses, including reasonable attorneys’ fees, that are incurred by indemnified persons in connection with their enforcement of the rights provided to such persons in the Merger Agreement. The director and officer indemnification provisions of the Merger Agreement are intended to be obtained, by independent legal counsel in a written opinion.


ITEM 16.EXHIBITS. 

The following exhibits are filed as part of this registration statement. Exhibit numbers correspondaddition to the exhibitrights otherwise available to the former officers and directors of TapImmune and Private Marker by law, charter, statute, bylaw or agreement, and shall operate for the benefit of, and shall be enforceable by, each of such indemnified persons, their heirs and their representatives.

In the event we or TapImmune (i) consolidates with or merges into any other person and shall not be the continuing or surviving corporation or entity of such consolidation or merger, or (ii) transfers all or substantially all of its properties and assets to any person, then, and in each such case, proper provision shall be made so that our successors and assigns shall succeed to the indemnification obligations set forth in the Merger Agreement.
The underwriting or sales agreement, if any, entered into with respect to an offering of securities registered hereunder will provide for indemnification by any underwriters of any offering, our directors and officers who sign the registration statement and our controlling persons for some liabilities, including liabilities arising under the Securities Act.
Item 16.
Exhibits and Financial Statement Schedules
Exhibit
Number
Description of Document
  1.1*Form of Underwriting Agreement.
 1.2Controlled Equity OfferingSMSales Agreement, dated as of August 10, 2021, by and among the Registrant, Cantor Fitzgerald & Co. and RBC Capital Markets, LLC.
 2.1Agreement and Plan of Merger and Reorganization, dated as of May 15, 2018 (incorporated by reference to Annex A to the Registrant’s Definitive Proxy Statement (File No. 001-37939), filed with the SEC on September 14, 2018).
 3.1Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.4 to the Registrant’s Current Report on Form 8-K (File No. 001-37939), filed with the SEC on October 17, 2018).
 3.2
 4.1Specimen Stock Certificate evidencing shares of Common Stock of the Registrant (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K (File No. 001-37939) filed with the SEC on October 17, 2018).
  4.2*Form of Specimen Preferred Stock Certificate and Certificate of Designation of Preferred Stock.
 4.3
  4.4*Form of Debt Securities.
 4.5
 4.6
 4.7
 5.1
23.1
23.2
24.1
   25.1**Statement of Eligibility of Trustee under the Indenture.
*
To be filed, if applicable, by amendment or by a report filed under the Exchange Act and incorporated herein by reference.

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**
To be filed, if applicable, in accordance with the requirements of Regulation S-K.

    Incorporated by Reference  
Exhibit
number 
 Exhibit description  Form File
no. 
 Exhibit  Filing
date 
 Filed
herewith 
             
3.1 Articles of Incorporation as Amended 10-Q 001-37939 3.1 11/4/16  
             
3.2 Certificate of Change 8-K 000-27239 3.1 9/15/16  
             
3.3 Amended and Restated Bylaws 8-K 000-27239 3.1 7/15/16  
             
3.4 Amendment to Amended and Restated Bylaws 8-K 001-37939 3.1 7/11/17  
             
4.1 Securities Purchase Agreement, dated May 17, 2010 8-K 000-27239 10.1 5/18/10  
             
4.2 Registration Rights Agreement, dated May 24, 2010 8-K 000-27239 10.4 5/18/10  
             
4.3 Security Agreement, dated May 24, 2010 8-K 000-27239 10.3 5/18/10  
             
4.4 Form of Senior Secured Convertible Note 8-K 000-27239 10.2 5/18/10  
             
4.5 Form of Series A Warrants 8-K 000-27239 10.5 5/18/10  
             
4.6 Form of Series B Warrants 8-K 000-27239 10.6 5/18/10  
             
4.7 Form of Series C Warrants 8-K 000-27239 10.7 5/18/10  
             
4.8 Securities Purchase Agreement, dated February 24, 2011 8-K 000-27239 10.1 3/2/11  
             
4.9 Form of Convertible Note 8-K 000-27239 10.2 3/2/11  
             
4.10 Security Agreement, dated February 24, 2011 8-K 000-27239 10.3 3/2/11  
             
4.11 Form of Warrant 8-K 000-27239 10.4 3/2/11  
             
4.12 Form of Convertible Note in connection with the sale of same on April 12, 2011 10-K 000-27239 4.12 4/18/11  
             
4.13 Security Agreement dated April 12, 2011 10-K 000-27239 4.13 4/18/11  
             
4.14 Form of Securities Purchase Agreement in connection with the sale of Units on April 14, 2011 10-K 000-27239 4.14 4/18/11  
             
4.15 Form of Warrant in connection with Securities Purchase Agreement dated April 14, 2011 10-K 000-27239 4.15 4/18/11  
             
4.16 Form of Common Stock Purchase Warrant 8-K 000-27239 4.1 8/14/14  
             
4.17 Form of Placement Agent Warrant 8-K 000-27239 4.2 8/14/14  
             
4.18 Form of Common Stock Purchase Warrants-Series A 8-K 000-27239 4.1 1/12/15  
             
4.19 Form of Common Stock Purchase Warrants-Series B 8-K 000-27239 4.2 1/12/15  
             
4.20 Form of Common Stock Purchase Warrants-Series C 8-K 000-27239 4.3 1/12/15  
             
4.21 Form of Common Stock Purchase Warrants-Series D 8-K 000-27239 4.4 1/12/15  
             
4.22 Form of Common Stock Purchase Warrants-Series E 8-K 000-27239 4.5 1/12/15  

   Incorporated by Reference  
Exhibit
number 
 Exhibit description  Form File
no. 
 Exhibit  Filing
date 
 Filed
herewith 
4.23 Form of Placement Agent Common Stock Purchase Warrants-Series A 8-K 000-27239 4.6 1/12/15  
             
4.24 Form of Placement Agent Common Stock Purchase Warrants-Series B 8-K 000-27239 4.7 1/12/15  
             
4.25 Form of Placement Agent Common Stock Purchase Warrants-Series C 8-K 000-27239 4.8 1/12/15  
             
4.26 Form of Placement Agent Common Stock Purchase Warrants-Series D 8-K 000-27239 4.9 1/12/15  
             
4.27 Form of Placement Agent Common Stock Purchase Warrants-Series E 8-K 000-27239 4.10 1/12/15  
             
4.28 Form of Common Stock Purchase Warrants-Series A-1 8-K 000-27239 4.1 3/10/15  
             
4.29 Form of Common Stock Purchase Warrants-Series B-1 8-K 000-27239 4.2 3/10/15  
             
4.30 Form of Common Stock Purchase Warrants-Series C-1 8-K 000-27239 4.3 3/10/15  
             
4.31 Form of Common Stock Purchase Warrants-Series D-1 8-K 000-27239 4.4 3/10/15  
             
4.32 Form of Common Stock Purchase Warrants-Series E-1 8-K 000-27239 4.5 3/10/15  
             
4.33 Form of Placement Agent Common Stock Purchase Warrants-Series A-1 8-K 000-27239 4.6 3/10/15  
             
4.34 Form of Placement Agent Common Stock Purchase Warrants-Series B-1 8-K 000-27239 4.7 3/10/15  
             
4.35 Form of Placement Agent Common Stock Purchase Warrants-Series C-1 8-K 000-27239 4.8 3/10/15  
             
4.36 Form of Placement Agent Common Stock Purchase Warrants-Series D-1 8-K 000-27239 4.9 3/10/15  
             
4.37 Form of Placement Agent Common Stock Purchase Warrants-Series E-1 8-K 000-27239 4.10 3/10/15  
             
4.38 Form of 2016 PIPE Warrant 8-K 000-27239 4.1 8/11/16  
             
4.39 Form of Amended Series A Warrant 8-K 000-27239 4.2 8/11/16  
             
4.40 Form of Amended Series C Warrant 8-K 000-27239 4.3 8/11/16  
             
4.41 Form of Amended Series D Warrant 8-K 000-27239 4.4 8/11/16  
             
4.42 Form of Amended Series E Warrant 8-K 000-27239 4.5 8/11/16  
             
4.43 Form of Amended Series A-1 Warrant 8-K 000-27239 4.6 8/11/16  
             
4.44 Form of Amended Series D-1 Warrant 8-K 000-27239 4.7 8/11/16  
             
4.45 Form of Amended Series E-1 Warrant 8-K 000-27239 4.8 8/11/16  
             
4.46 Form of Series F Warrant 8-K 000-27239 4.9 8/11/16  
             
4.47 Form of Series F-1 Warrant 8-K 000-27239 4.10 8/11/16  
             
4.48 Form of 2016 Broker Warrant 8-K 000-27239 4.11 8/11/16  


   Incorporated by Reference  
Exhibit
number 
 Exhibit description  Form File
no. 
 Exhibit  Filing
date 
 Filed
herewith 
4.49 Form of 2017 PIPE Warrant 8-K 001-37939 4.1 6/22/17  
             
4.50 Form of 2017 Broker PIPE Warrant 8-K 001-37939 4.2 6/22/17  
             
5.1 Opinion of Shumaker, Loop & Kendrick, LLP         X
             
10.1 Executive Services Agreement with Denis Corin 10-QSB 000-27239 10.1 11/14/07  
             
10.2 Amended Executive Services Agreement with Denis Corin 10-QSB 000-27239 10.2 11/14/07  
             
10.3 License Agreement made March 6, 2000 between GeneMax Pharmaceuticals, UBC and Dr. Jefferies 10-KSB 000-27239 10.2 4/15/05  
             
10.4 Collaborative Research Agreement made September 1, 2000 between GeneMax Pharmaceuticals, GeneMax Pharmaceuticals Inc. and UBC 10-KSB 000-27239 10.3 4/15/05  
             
10.5 Production Services Agreement made March 18, 2003 between the Company and Molecular Medicine 10-KSB 000-27239 10.5 4/15/05  
             
10.6 Biological Materials Transfer Agreement made October 21, 2003 between the Company and National Institutes of Health 10-KSB 000-27239 10.6 4/15/05  
             
10.7 Option and Settlement Agreement made January 23, 2006 between GeneMax Pharmaceuticals, GeneMax Pharmaceuticals Inc., UBC and Dr. Jefferies 8-K 000-27239 10.1 2/3/06  
             
10.8 2009 Stock Incentive Plan* DEF14-C 000-27239 B 1/29/10  
             
10.9 Technology Option Agreement, dated June 1, 2010, between TapImmune Inc. and Mayo Foundation for Education and Research  8-K 000-27239 10.1 6/4/10  
             
10.10 Form of Securities Purchase Agreement, dated as of August 11, 2014, by and among the Company and the Purchasers 8-K 000-27239 10.1 8/11/14  
             
10.11 Placement Agency Agreement, dated as of July 29, 2014, by and between the Company and H. C. Wainwright & Co., LLC 8-K 000-27239 10.2 8/14/14  
             
10.12 Form of Securities Purchase Agreement, dated as of January 12, 2015, by and among the Company and the Purchasers 8-K 000-27239 10.1 1/12/15  
             
10.13 Placement Agency Agreement, dated as of July 29, 2014 and Amended on January 12, 2015, by and between the Company and H. C. Wainwright & Co., LLC 8-K 000-27239 10.2 1/12/15  
             
10.14 Finders Agreement, dated as of January 12, 2015, by and between the Company and Olympus Securities LLC 8-K 000-27239 10.3 1/12/15  
             
10.15 Securities Purchase Agreement, dated as of March 9, 2015, by and among the Company and Eastern Capital Limited 8-K 000-27239 10.1 3/10/15  
             
10.16 Placement Agency Agreement, dated as of July 29, 2014, Amended on January 12, 2015, by and between the Company and H. C. Wainwright & Co., LLC and Amended on March 9, 2015, by and between the Company and H. C. Wainwright & Co., LLC 8-K 000-27239 10.2 3/10/15  
             
10.17 Form of Restructuring Agreement dated May 28, 2015 8-K 000-27239 10.1 6/3/15  
             
10.18 Amended and Restated Restructuring Agreement, dated as of June 2, 2015 8-K 000-27239 10.1 6/5/15  
             
10.19 Consulting Agreement, dated February 10, 2015, between TapImmune Inc. and Dr. John Bonfiglio* 8-K 000-27239 10.1 7/30/15  
             
10.20 License and Assignment Agreement, dated July 21, 2015, with The Mayo Foundation for Medical Education and Research** 10-Q 000-27239 10.1 8/14/15  
             
10.21 2014 Omnibus Stock Ownership Plan* 10-Q 000-27239 10.1 11/16/15  
             
10.22 Amendment to 2014 Omnibus Stock Ownership Plan (February 10, 2015) * 10-Q 000-27239 10.2 11/16/15  
             
10.23 Amendment to 2014 Omnibus Stock Ownership Plan (November 6, 2015) * 10-Q 000-27239 10.3 11/16/15  

             
10.24 Amendment to 2014 Omnibus Stock Ownership Plan (August 29, 2017) * 8-K 001-37939 10.1 9/5/17  


   Incorporated by Reference  
Exhibit
number 
 Exhibit description  Form File
no. 
 Exhibit  Filing
date 
 Filed
herewith 
10.25 Form of Stock Option Award Agreement – Key Employee* 10-Q 000-27239 10.4 11/16/15  
             
10.26 Form of Stock Option Award Agreement – Non-employee Director* 10-Q 000-27239 10.5 11/16/15  
             
10.27 Form of Stock Option Award Agreement – Consultant* 10-Q 000-27239 10.6 11/16/15  
             
10.28 Form of Restricted Stock Award Agreement – Consultant* 10-Q 000-27239 10.7 11/16/15  
             
10.29 Employment Agreement between TapImmune, Inc. and Dr. Glynn Wilson, dated November 12, 2015* 10-Q 000-27239 10.8 11/16/15  
             
10.30 Amendment to Consulting Agreement between TapImmune Inc. and Dr. John Bonfiglio dated as of June 12, 2015* 8-K 000-27239 10.2 2/16/16  
             
10.31 Second Amendment to the Consulting Agreement by and between TapImmune Inc. and Dr. John Bonfiglio dated as of February 10, 2016* 8-K 000-27239 10.3 2/16/16  
             
10.32 License and Assignment Agreement with Mayo Foundation for Medical Education and Research dated May 19, 2016** 10-Q 000-27239 10.7 8/15/16  
             
10.33 Amendment to Employment Agreement between TapImmune Inc. and Glynn Wilson, dated as of July 18, 2016* 8-K 000-27239 10.1 7/19/16  
             
10.34 Employment Agreement by and between by and between TapImmune Inc. and Dr. John Bonfiglio dated as of July 18, 2016* 8-K 000-27239 10.2 7/19/16  
             
10.35 Employment Agreement by and between by and between TapImmune Inc. and Michael J. Loiacono dated as of August 25, 2016* 8-K 000-27239 10.1 8/25/16  
             
10.36 Form of Subscription Agreement 8-K 001-37939 10.1 6/22/17  
             
10.37 Registration Rights Agreement dated June 26, 2017 8-K 001-37939 10.2 6/22/17  
             
10.38 Form of Warrant Exercise Agreement 8-K 001-37939 10.3 6/22/17  
             
10.39 Agency Agreement between TapImmune Inc. and Katalyst Securities LLC, dated May 12, 2017 8-K 001-37939 10.4 6/22/17  
             
10.40 Amendment to Placement Agency Agreement between TapImmune Inc. and Katalyst Securities LLC dated June 22, 2017 8-K 001-37939 10.1 6/26/17  
             
14 Code of Ethics 10-Q 000-27239 14 11/16/15  
             
23.1 Consent of Marcum LLP, an independent public accounting firm.         X
             
23.2 Consent of Shumaker, Loop & Kendrick, LLP (included as part of Exhibit 5.1)         X
             
24.1 Powers of Attorney (included on signature page).         X
             
101.INS XBRL Instance Document 10-K 000-27239   4/14/16  
             
101.SCH XBRL Taxonomy Extension Schema Document 10-K 000-27239   4/14/16  
             
101.CAL XBRL Taxonomy Extension Calculation Linkbase Document 10-K 000-27239   4/14/16  
             
101.DEF XBRL Taxonomy Extension Definition Linkbase Document 10-K 000-27239   4/14/16  
             
101.LAB XBRL Taxonomy Extension Label Linkbase Document 10-K 000-27239   4/14/16  
             
101.PRE XBRL Taxonomy Extension Presentation Linkbase Document 10-K 000-27239   4/14/16  
             
101.INS XBRL Instance Document 10-Q 001-37939   11/4/16  
             
101.SCH XBRL Taxonomy Extension Schema Document 10-Q 001-37939   11/4/16  
             
101.CAL XBRL Taxonomy Extension Calculation Linkbase Document 10-Q 001-37939   11/4/16  
             
101.DEF XBRL Taxonomy Extension Definition Linkbase Document 10-Q 001-37939   11/4/16  
             
101.LAB XBRL Taxonomy Extension Label Linkbase Document 10-Q 001-37939   11/4/16  
             
101.PRE XBRL Taxonomy Extension Presentation Linkbase Document 10-Q 001-37939   11/4/16  

*Executive management contract or compensatory plan or arrangement.

** Confidential treatment has been granted as to certain portions of this exhibit pursuant to Rule 406Section 305(b)(2) of the SecuritiesTrust Indenture Act of 1933, as amended, or1939 and Rule 24b-2 of the Securities Exchange Act of 1934, as amended. 5b-3 thereunder.

Item 17.


ITEM 17.UNDERTAKINGS.

A.RULE 415 OFFERING

Undertakings
The undersigned registrant hereby undertakes:

(1)
To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

registration statement:

(i)
To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933, as amended;

1933;

(ii)
To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in the volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b)) if, in the aggregate, the changes in volume and price represent no more than 20%20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii)
To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

Provided,

provided, however, That:

Paragraphsthat the undertakings set forth in paragraphs (1)(i), (1)(ii) and (1)(iii) of this sectionabove do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to sectionSection 13 or sectionSection 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in thethis registration statement or isare contained in a form of prospectus filed pursuant to Rule 424(b) that is part of thethis registration statement.

(2)
That, for the purpose of determining any liability under the Securities Act of 1933, each such post- effectivepost-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3)
To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4)
That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

(i)
Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(ii)
Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by sectionSection 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document

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incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

(5)

(5) If

That, for the purpose of determining liability of the registrant is subjectunder the Securities Act of 1933 to Rule 430C, eachany purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser: (i) any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424(b) as part of a registration statement424; (ii) any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant; (iii) the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and (iv) any other communication that is an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and includedoffer in the registration statement as ofoffering made by the date it is first used after effectiveness. Provided, however, that no statement made in a registration statement or prospectus that is part ofundersigned registrant to the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

purchaser.

(6)
That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(7)
To file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the Commission under Section 305(b)(2) of the Trust Indenture Act.
Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue.


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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statementRegistration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Jacksonville,Houston, State of Florida,Texas, on September 20, 2017.

this 10
th day of August, 2021.
TapImmune Inc.MARKER THERAPEUTICS, INC.
By:
/s/ Glynn Wilson
Dr. Glynn Wilson
Peter Hoang
Peter Hoang
President and Chief Executive Officer (Principal Executive Officer) 
By:/s/ Michael J. Loiacono
Michael J. Loiacono
Chief Financial Officer (Principal Accounting Officer) 

POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Peter Hoang and Anthony Kim, jointly and severally, as his or her true and lawful agent, proxy and attorneys-in-fact, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to (i) act on, sign and file with the Securities and Exchange Commission any and all amendments (including post-effective amendments) to this registration statement together with all schedules and exhibits thereto and any subsequent registration statement filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended, together with all schedules and exhibits thereto, (ii) act on, sign and file such certificates, instruments, agreements and other documents as may be necessary or appropriate in connection therewith, (iii) act on and file any supplement to any prospectus included in this registration statement or any such amendment or any subsequent registration statement filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and (iv) take any and all actions which may be necessary or appropriate to be done, as fully for all intents and purposes as he or she might or could do in person, hereby approving, ratifying and confirming all that such agent, proxy and attorney-in-fact or any of his substitutes may lawfully do or cause to be done by virtue thereof.
Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statementRegistration Statement has been signed by the following persons in the capacities and on the dates indicated. Each person in so signing also makes, constitutes and appoints Glynn Wilson and Michael J. Loiacono, and each of them with the power to act without the other, his or her true and lawful attorney-in-fact, with full power of substitution, in any and all capacities, to execute and cause to be filed with the Securities and Exchange Commission pursuant to the requirements of the Securities Act of 1933, as amended, any and all amendments to this Registration Statement, with exhibits to such registration statements and amendments and other documents in connection therewith, and hereby ratifies and confirms all that said attorney-in-fact or his or her substitute or substitutes may do or cause to be done by virtue hereof.

SignatureNameTitleTitleDate
/s/ Peter Hoang
Peter Hoang
President, Chief Executive Officer and Director (Principal Executive Officer)
August 10, 2021
/s/ Sherry GrisewoodAnthony Kim
Anthony Kim
Director
Chief Financial Officer
(Principal Financial and Accounting Officer)
September 20, 2017August 10, 2021
Sherry Grisewood
/s/ Frederick Wasserman
Frederick Wasserman
Chairman of the BoardAugust 10, 2021
/s/ Glynn WilsonDirectorSeptember 20, 2017
Dr. Glynn Wilson
/s/ David Laskow-Pooley
Director September 20, 2017
David Laskow-Pooley
/s/ Mark ReddishDirectorSeptember 20, 2017August 10, 2021
Mark Reddish
/s/ Frederick WassermanJohn Wilson
John Wilson
Director  September 20, 2017
Frederick Wasserman 
/s/ Joshua SilvermanDirectorSeptember 20, 2017August 10, 2021
Joshua Silverman
/s/ Juan Vera
Juan Vera
DirectorAugust 10, 2021
/s/ N. David Eansor
N. David Eansor
DirectorAugust 10, 2021
/s/ Michael J. LoiaconoSteve Elms
Steve Elms
Chief Financial OfficerDirectorSeptember 20, 2017
Michael J. Loiacono August 10, 2021


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