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TABLE OF CONTENTS

Table of Contents

As filed with the Securities and Exchange Commission on June 16, 2015July 26, 2019.

Registration No. 333-203431333-          


UNITED STATES


SECURITIES AND EXCHANGE COMMISSION

Washington, DCD.C. 20549



AMENDMENT NO. 2

TO

FORM S-3

REGISTRATION STATEMENT
UNDER
THE

SECURITIES ACT OF 1933



CAPSTONE TURBINE CORPORATION
Capstone Turbine Corporation

(Exact name of registrant as specified in its charter)



Delaware

95-4180883

Delaware
(State or other jurisdiction of
incorporation or organization)

95-4180883
(I.R.S. Employer
Identification No.)

Number)


21211 Nordhoff16640 Stagg Street

Chatsworth,
Van Nuys, California 91311

91406
(818) 734-5300


(Address, including zip code, and telephone number,
including area code, of registrant’s principal executive offices)



Darren R. Jamison


President and Chief Executive Officer


Capstone Turbine Corporation

21211 Nordhoff
16640 Stagg Street

Chatsworth,
Van Nuys, California 91311

91406
(818) 734-5300


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



withWith copies to:
Jocelyn M. Arel, Esq.
Mitzi Chang, Esq.
Goodwin Procter LLP
100 Northern Avenue
Boston, MA 02210
Phone: (617) 570-1000
Fax: (617) 523-1231


J. Chase Cole, Esq.

Waller Lansden Dortch & Davis, LLP

511 Union Street, Suite 2700

Nashville, Tennessee  37219

(615) 244-6380


Approximate date of commencement of proposed sale to the public:
From time to time after the effective date of this Registration Statement as determined by Capstone Turbine Corporation based on market conditions and other factors.becomes effective.


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

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, as amended, other than securities offered only in connection with dividend or interest reinvestment plans, please check the following box:    ýx

If this Formform 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.    o

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

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.    o

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.    o

            

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

Large accelerated filer o

Accelerated filer ox

Non-accelerated filer ýo (Do not check if a smaller reporting company)

Smaller reporting company ý

Emerging growth company o


            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 7(a)(2)(B) of the Securities Act. o

CALCULATION OF REGISTRATION FEE

Title of each class of
securities to be registered

 

Amount to be
registered

 

Proposed maximum
offering price
per security

 

Proposed maximum
aggregate
offering price

 

Amount of
registration fee

 

Debt Securities, Preferred Stock, $0.001 par value, Common Stock Warrants and Common Stock, $0.001 par value and related Preferred Stock purchase rights (2)

 

$

100,000,000

(1)(3)

(3)(4)

$

100,000,000

(1)(3)(4)(5)

$

6,379.00

*(6)(7)

        
 
Title of Each Class of Securities
to be Registered

 Amount to be
Registered

 Proposed Maximum
Offering Price Per
Share(2)

 Proposed Maximum
Aggregate Offering
Price(2)

 Amount of
Registration Fee

 

Common Stock, par value $0.001 per share

 4,046,337(1) $0.74 $2,994,289.38 $362.91

 

(1) The
This amount represents shares to be registered consistsoffered by the selling stockholder from time to time after the effective date of up to $100,000,000  (in U.S. dollars or the equivalent thereofthis Registration Statement at prevailing market prices at the time of salesale. Consists of shares of common stock issuable upon the exercise of the Company's existing warrant (the "Warrant") issued pursuant to the terms of the Note Purchase Agreement, dated February 4, 2019, by and among the registrant, the purchasers named therein and the other parties thereto (the "Note Purchase Agreement"). In accordance with Rule 416(a), the registrant is also registering for any debt security denominated in one or more foreign currencies or composite currencies) of an indeterminate principal amount of debt securities,resale hereunder an indeterminate number of shares that may be issued with respect to the shares being registered hereunder as a result of Preferred Stock, an indeterminate number of Common Stock warrants and an indeterminate number of shares of Common Stock as may from time to time be issuable hereunder and,stock splits, stock dividends or other similar transactions as may be issuable upon conversion, exchange, exercise or settlement of any securities registered hereunder, including under any applicable anti-dilution provisions.

(2) This registration statement also covers rights to purchase shares of the registrant’s Preferred Stock (the “Rights”) which are issuableissued pursuant to the registrant’s stockholder rights plan.  Until the occurrence of certain prescribed events, the Rights are not exercisable and will be transferable along with and only with the Common Stock. The value attributable to the Rights, if any, is reflected in the valueanti-dilution provisions of the Common Stock.

(3) Pursuant to General Instruction II. D. of Form S-3 under the Securities Act, the fee table does not specify by each class of securities to be registered information as to the amount to be registered, proposed maximum offering price per security and the proposed maximum aggregate offering price.  Securities sold hereunder may be sold separately, together with other securities registered hereunder.

(4) The proposed maximum offering price per security will be determined from time to time by the registrant in connection with, and at the time of, the issuance by the registrant of the securities registered hereunder.

(5) Warrant or otherwise.

(2)
Estimated solely for purposes of calculating the registration fee.  No separate consideration will be received for securities as may from time to time be issued upon conversion or exchange of securities registered hereunder.

(6) Calculated pursuant to Rule 457(o) under the Securities Act.

(7) Pursuant to Rule 415(a)(6) under the Securities Act, the securities registered pursuant to this registration statement include $45,103,271.04 of unsold securities previously registered by the registrant on the registration statement (File No. 333-179334) filed with the Securities and Exchange Commission on February 3, 2012 and declared effective on April 16, 2012 (the “Prior Registration Statement”). The Prior Registration Statement has a balance of unsold securities with an aggregate offering price of $45,103,271.04. In connection with the registration of such unsold securities on the Prior Registration Statement, the registrant paid a registration fee of $3,616.78 for such unsold securities, which fee will continue to be applied to such unsold securities included on this registration statement. Accordingly, the amount of the registration fee for the registration of securities under this registration statement has been calculated based on the proposed maximum offering price of the additional $54,896,728.96 of securities registered on this registration statement. To the extent that, after the filing date hereof and prior to the effectiveness of this registration statement, the registrant sells any securities pursuant to the Prior Registration Statement, the registrant will identify in a pre-effective amendment to this registration statement the updated amount of securities from the Prior Registration Statement to be included in this registration statement pursuant to Rule 415(a)(6) and the updated amount of new securities to be registered on this registration statement. Pursuant to Rule 415(a)(6), the offering of the unsold securities registered under the Prior Registration Statement will be deemed terminated as of the date of effectiveness of this registration statement.

* Previously paid

The registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a)457(c) of the Securities Act of 1933, or untilas amended (the "Securities Act"), based upon the Registration Statement shall become effectiveaverage of the high and low sales prices of the registrant's common stock as reported on such date as the Commission, acting pursuant to said SectionThe NASDAQ Capital Market on July 24, 2019.

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION ACTING PURSUANT TO SAID SECTION 8(a), may determine.MAY DETERMINE.

   




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The information in this preliminary prospectus is not complete and may be changed. WeThese securities may not sell these securitiesbe sold until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell these securities and is not solicitingnor does it seek an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED July 26, 2019.

PROSPECTUS

LOGO

4,046,337 Shares of Common Stock



        

PROSPECTUS

SubjectThis prospectus relates to Completion, dated

June 16, 2015

Capstone Turbine Corporation

$100,000,000

Common Stock

Common Stock Warrants

Preferred Stock

Debt Securities


We maythe resale from time to time offer, issue and sell, in one or more series, together or separately, the following:

·of up to 4,046,337 shares of our Common Stock;common stock by the selling stockholder named in this prospectus. These shares are shares of common stock issuable upon exercise of a warrant held by the selling stockholder identified in this prospectus. We are not selling any securities under this prospectus and we will not receive any of the proceeds from the sale of our common stock by the selling stockholder. We will, however, receive the net proceeds of any warrants exercised for cash.

        

·warrantsThe shares of common stock registered are issuable on exercise of a warrant (the "Warrant") sold to purchasethe selling stockholder under the Note Purchase Agreement dated February 4, 2019, by and among the registrant, the purchasers named therein and the other parties thereto (the "Note Purchase Agreement"). The selling stockholder may resell or dispose of the shares of our Common Stock;

·shares of our Preferred Stock;

·debt securities, which may be either senior debt securitiescommon stock, or subordinated debt securities, in each case consisting of notes or other evidence of indebtedness;

·rights to purchase the foregoing securities (see “Plan of Distribution”); or

·any combination of these securities.

We will offer such securitiesinterests therein, at an aggregate public offering price of up to $100,000,000, or an equivalent amount in U.S. dollars if any securities are denominated in a currency other than U.S. dollars, on terms determinedfixed prices, at prevailing market prices at the time we offer such securities. We may offer such securities separatelyof sale or together, in separate classes or series, in amounts, at prices negotiated with purchasers, to or through underwriters, broker-dealers, agents, or through any other means described in this prospectus under "Plan of Distribution." The selling stockholder will bear all selling commissions and underwriting discounts, if any, attributable to the sale or disposition of the shares, or interests therein. We will bear all costs, expenses and fees in connection with the registration of the shares.

        You should read this document and any prospectus supplement or amendment carefully before you invest in our securities.

        Our common stock is traded on terms set forth in an applicable supplement to this prospectus.the Nasdaq Capital Market under the symbol "CPST." On July 25, 2019, the closing sales price of our common stock on the Nasdaq Capital Market was $0.7261 per share. The applicable prospectus supplement will also contain information, aboutwhere applicable, as to any other listing, if any, on athe Nasdaq Capital Market or any securities market or other exchange of the securities covered by such prospectus supplement.

We may sell the securities to one or more underwriters for public offering and sale by them, through agents or dealers, directly to purchasers or through a combination of any of these methods of sale. We reserve the sole right to accept, and together with our agents, dealers and underwriters reserve the right to reject, in whole or in part, any proposed purchase of securities to be made directly or through agents, dealers or underwriters. If any agents, dealers or underwriters are involved in the sale of any of the securities, their names, and any applicable purchase price, fee, commission or discount arrangement between or among them, will be set forth, or will be calculable from the information set forth, in the applicable prospectus supplement. See “Plan



Investing in our securities involves a high degree of Distribution.” Our estimated net proceeds fromrisk. You should review carefully the sale of securities also will be set forthrisks and uncertainties described under the heading "Risk Factors" contained in the relevantthis prospectus supplement. No securities may be sold without delivery of thebeginning on page 2 and any applicable prospectus supplement, describingand under similar headings in the method and terms of the offering of such securities.

Our Common Stock is listed on the Nasdaq Global Market under the symbol “CPST.”


Investing in these securities involves risks. You should carefully review the discussion under the heading “Risk Factors” on page 5 regarding information included andother documents that are incorporated by reference in the prospectus and the applicable prospectus supplement.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.

   


The date of this prospectusProspectus is .July    , 2019.




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Page

ABOUT THIS PROSPECTUSAbout this Prospectus

2

1

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTSRisk Factors

2

RISK FACTORSCautionary Statement Regarding Forward-Looking Statements

5

3

THE COMPANYPending Annual Meeting of Stockholders to Approve Reverse Stock Split

5

6

USE OF PROCEEDSThe Company

5

7

RATIO OF EARNINGS TO FIXED CHARGESUse of Proceeds

6

8

GENERAL DESCRIPTION OF SECURITIES WE MAY SELLDescription of Capital Stock

6

8

DESCRIPTION OF COMMON STOCKSelling Stockholder

7

15

DESCRIPTION OF COMMON STOCK WARRANTSPlan of Distribution

11

17

DESCRIPTION OF PREFERRED STOCKLegal Matters

12

20

DESCRIPTION OF DEBT SECURITIESExperts

17

20

PLAN OF DISTRIBUTIONWhere You Can Find More Information

26

20

LEGAL MATTERSIncorporation by Reference

28

20

i


EXPERTS

28

WHERE YOU CAN FIND MORE INFORMATION

29

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

29



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ABOUT THIS PROSPECTUS

        

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and Exchange Commission (“SEC”("SEC") using a “shelf” registration process. Under this shelf process, we. The selling stockholder may from time to time sell the securitiesup to 4,046,337 shares of common stock, as described in this prospectus, in one or more offerings upofferings. This prospectus also covers any shares of common stock that may become issuable pursuant to an aggregate offering priceanti-dilution adjustment provisions that would increase the number of $100,000,000.shares issuable upon exercise of the Warrant as a result of stock splits, stock dividends or similar transactions. We have agreed to pay the expenses incurred in registering these shares, including legal and accounting fees.

        This prospectus provides you with a general description of the securities wethe selling stockholder may offer. Each time we sell securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering.  The prospectus supplement may also add, update or change information contained in this prospectus. You should read both thethis prospectus and any prospectus supplement together with the additional information described under the heading “Where"Where You Can Find More Information” and “IncorporationInformation" beginning on page 20 of Certain Documents by Reference.”this prospectus.

        

You should rely only on the information contained in or incorporated by reference in this prospectus. WeNeither we nor the selling stockholder have not authorized any personanyone to provide you with information different from orinformation. The selling stockholder is offering to sell, and seeking offers to buy, shares of our common stock only in additionjurisdictions where it is lawful to that contained in this prospectus. If anyone provides you with different or inconsistent information, you should not rely on it. We aredo so. The selling stockholder is not making an offer to sellof these securitiesshares in any jurisdiction where theirthe offer or sale is not permitted.

        You should assume that the information appearing in this prospectus or any other documents incorporated by reference is accurate only as of the date on the front cover of the applicable document. Our business, financial condition, results of operations and prospects may have changed since that date.

References in this prospectus to “Capstone,” “the Company,” “we,” “us” and “our” refer to Capstone Turbine Corporation, a Delaware corporation, unless the context otherwise requires.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus (including the information incorporated by reference) contains “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements include statements concerning, among other things, our future results of operations, research and development activities, sales expectations, our ability to develop markets for our products and to produce products at a pace commensurate with demand, sources for parts, federal, state and local regulations and general business, industry and economic conditions applicable to us. When used in this prospectus, the words “estimates,” “expects,” “anticipates,” “projects,” “plans,” “intends,” “believes,” “should,” “could,” “may” and variations of such words or similar expressions are intended to identify forward-looking statements.  All forward-looking statements, including, without limitation, our examination of historical operation trends, are based upon our current expectations and various assumptions.

There are a number of risks and uncertainties that could cause our actual results to differ materially from the forward-looking statements contained in this prospectus.  Factors that could cause our actual results to differ materially from the forward-looking statements include:

·Our operating history is characterized by net losses. We anticipate further losses and we may never become profitable;

·We may be unable to fund our future operating requirements, which could force us to curtail our operations;

·If we are unable to either substantially improve our operating results or obtain additional financing, we may be unable to continue as a going concern;

·Impairment charges on our long-lived assets, including intangible assets with finite lives, would adversely affect our financial position and results of operations;

·A sustainable market for microturbines may never develop or may take longer to develop than we anticipate which would adversely affect our results of operations;

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·Our operating results are dependent, in large part, upon the successful commercialization of our products. Failure to produce our products as scheduled and budgeted would materially and adversely affect our business and financial condition;

·We may not be able to produce our products on a timely basis if we fail to correctly anticipate product supply requirements or if we suffer delays in production resulting from issues with our suppliers. Our suppliers may not supply us with a sufficient amount of components or components of adequate quality, or they may provide components at significantly increased prices;

·                   ��           We may not be able to effectively manage our growth, expand our production capabilities or improve our operational, financial and management information systems, which would impair our results of operations;

·Adverse economic conditions may have an impact on our business and financial condition, including some effects we may not be able to predict;

·Product quality expectations may not be met, causing slower market acceptance or warranty cost exposure;

·We operate in a highly competitive market among competitors who have significantly greater resources than we have and we may not be able to compete effectively;

·If we do not effectively implement our sales, marketing and service plans, our sales will not grow and our results of operations will suffer;

·Our sales and results of operations could be materially and adversely impacted by risks inherent in international markets;

·The current geopolitical instability in Russia and Ukraine and related sanctions by the U.S. government against certain companies and individuals may hinder our ability to conduct business with potential or existing customers and vendors in these countries;

·We cannot be certain of the future effectiveness of our internal controls over financial reporting. If we are unable to maintain effective internal controls over our financial reporting, investors may lose confidence in our ability to provide reliable and timely reports and the value of our common stock may decline;

·We may not be able to retain or develop relationships with original equipment manufacturers or distributors in our targeted markets, in which case our sales would not increase as expected;

·Activities necessary to integrate any future acquisitions may result in costs in excess of current expectations or be less successful than anticipated;

·We have substantial accounts receivable, and increased bad debt expense or delays in collecting accounts receivable could have a material adverse effect on our cash flows and results of operations;

·Loss of a significant customer could have a material adverse effect on our results of operations;

·We may not be able to develop sufficiently trained applications engineering, installation and service support to serve our targeted markets;

·Changes in our product components may require us to replace parts held at distributors;

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·We operate in a highly regulated business environment, and changes in regulation could impose significant costs on us or make our products less economical, thereby affecting demand for our microturbines;

·Utility companies or governmental entities could place barriers to our entry into the marketplace, and we may not be able to effectively sell our products;

·We depend upon the development of new products and enhancements of existing products;

·Operational restructuring may result in asset impairment or other unanticipated charges;

·We may not achieve production cost reductions necessary to competitively price our products, which would adversely affect our sales;

·Commodity market factors impact our costs and availability of materials;

·Our products involve a lengthy sales cycle and we may not anticipate sales levels appropriately, which could impair our results of operations;

·Potential litigation may adversely impact our business;

·Our business could be negatively impacted if we fail to adequately protect our intellectual property rights or if third parties claim that we are in violation of their intellectual property rights;

·Our results of operations could be materially and adversely affected by risks related to cyber security threats;

·We may incur costs and liabilities as a result of product liability claims;

·We have significant tax assets, usage of which may be subject to limitations in the future;

·Our success depends in significant part upon the continuing service of management and key employees;

·Our operations are vulnerable to interruption by fire, earthquake and other events beyond our control;

·If we continue to fail to meet all applicable Nasdaq Global Market requirements and Nasdaq determines to delist our Common Stock, the delisting could adversely affect the market liquidity of our Common Stock, impair the value of your investment and adversely affect our ability to raise needed funds;

·The market price of our Common Stock has been and may continue to be highly volatile and you could lose all or part of your investment in our securities; and

·Provisions in our certificate of incorporation, bylaws and our stockholder rights plan, as well as Delaware law, may discourage, delay or prevent a merger or acquisition at a premium price.

We caution you that these factors, as well as the risk factors included or incorporated by reference in this prospectus or any prospectus supplement, may not be exhaustive. Our actual results, performance or achievements could differ materially from the results expressed in, or implied by, these forward-looking statements. We operate in a continually changing business environment, and new risk factors emerge from time to time. We cannot predict such new risk factors, nor can we assess the impact, if any, of such new risk factors on our businesses or the extent to which any factor or combination of factors may cause actual results to differ materially from those expressed or implied by any forward-looking statements. You should review any further disclosures we make on related subjects

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in reports we file with the SEC. All forward-looking statements attributable to us or persons acting on our behalf apply only as of the date of this prospectus, and are expressly qualified in their entirety byregardless of the cautionary statements includedtime of delivery of this prospectus or any sale of our common stock.

        Unless the context otherwise indicates, references in this prospectus. We undertake no obligationprospectus to update publicly or revise forward-looking statements, which may be made"Capstone", "we", "our", "us" and "the Company" refer, collectively, to reflect events or circumstances after the date made or to reflect the occurrenceCapstone Turbine Corporation, a Delaware corporation.


Table of unanticipated events, except as required by applicable securities laws.Contents


RISK FACTORS

An investment        Investing in our securities involves a high degree of risk. In addition to the other information included andin, or incorporated by reference ininto, this prospectus, you should carefully reviewconsider the risk factors and other information included and incorporated by reference infrom ourAnnual Report on Form 10-K for the applicableyear ended March 31, 2019, which is on file with the SEC and is incorporated by reference into this prospectus, supplementas the same may be updated from time to time by our future filings under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), when determining whether or not to purchase the securities offered under this prospectus.


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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

        This prospectus, including the documents that we incorporate by reference, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Exchange Act, that are based on our management's belief and assumptions and on information currently available to our management. Although we believe that the expectations reflected in these forward-looking statements are reasonable, these statements relate to future events or our future financial performance, and 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 any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements.

        In some cases, you can identify forward-looking statements by terminology such as "may," "will," "should," "expects," "intends," "plans," "anticipates," "believes," "estimates," "predicts," "potential," "continue" or the negative of these terms or other comparable terminology. These statements are only predictions. You should not place undue reliance on forward-looking statements because they involve known and unknown risks, uncertainties and other factors, which are, in some cases, beyond our control and which could materially affect our results. Factors that may cause actual results to differ materially from current expectations include, among other things, those listed under the heading "Risk Factors" in this prospectus and in any applicable prospectus supplement or free writing prospectus and any documents incorporated by reference herein or therein. If one or more of these risks or uncertainties occur, or if our underlying assumptions prove to be incorrect, actual events or results may vary significantly from those implied or projected by the forward-looking statements. No forward-looking statement is a guarantee of future performance. You should read this prospectus, any applicable prospectus supplement and any free writing prospectus, including the documents that we incorporate by reference herein and therein and have filed as exhibits to the registration statement, of which this prospectus is part, completely and with the understanding that our actual future results may be materially different from any future results expressed or implied by these forward-looking statements. In particular, forward-looking statements in this prospectus, any applicable prospectus supplement or free writing prospectus and the documents that we incorporate by reference herein and therein include statements about:

    our results of operations;

    profits and losses;

    our ability to raise additional capital;

    R&D activities;

    sales expectations;

    our ability to develop markets for our products;

    sources for parts;

    federal, state and local government regulations;

    our relationship with our distributors;

    industry and economic conditions applicable to us;

    the efficiency, reliability and environmental advantages of our products and their need for maintenance;

    our ability to be cost competitive and to outperform competition;

    customer satisfaction;

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    the value of using our products;

    our ability to achieve economies of scale;

    market advantage;

    return on investments;

    issues with suppliers;

    anticipation of product supply requirements;

    listing requirements;

    our microturbine technology;

    the utilization of our products;

    competition;

    the introduction of new technologies;

    our production capacity;

    international markets;

    protection of intellectual property;

    cybersecurity threats;

    the adequacy of our facilities;

    dividends;

    business strategy;

    product development;

    capital resources;

    capital expenditures;

    liquidity;

    amortization expense of intangibles;

    cost of warranties;

    stock based compensation;

    our NOL rights plan;

    purchase and lease commitments;

    current liabilities;

    recently issued accounting standards;

    market risk;

    international sanctions risk;

    the strength of the U.S. dollar;

    interest rate sensitivity;

    the effect of cost reductions on future business initiatives;

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    the Tax Cuts and Jobs Act; and

    growth of the shale gas market.

        Forward-looking statements contained in this prospectus, any applicable prospectus supplement.supplement or free writing prospectus or in the documents that we reference herein and therein represents our views only as of the respective dates on which such statements were made. We anticipate that subsequent events and developments may cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. Therefore, these forward-looking statements do not represent our views as of any date other than the date on which they were made.


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PENDING ANNUAL MEETING OF STOCKHOLDERS TO APPROVE REVERSE STOCK SPLIT

        On July 15, 2019, we filed a definitive proxy statement with the SEC with respect to our annual meeting of stockholders to, among other proposals, consider the approval of a reverse stock split at a ratio that will be determined by our board of directors (the "Board") and that will be within a range of one-for-five (1:5) to one-for-ten (1:10). Our stockholders of record at the close of business on July 3, 2019 are entitled to vote at the annual meeting to be held on August 29, 2019 or any adjournments or postponements of the annual meeting. If the reverse stock split is approved and implemented, the number of our issued and outstanding shares will be reduced based on the ratio and the number of shares offered hereby and the number of shares subject to the Warrant and its exercise price will be proportionately adjusted.


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THE COMPANY

        

We develop, manufacture, market and service microturbine technology solutions for use in stationary distributed power generation and distribution networks applications, including energy efficient cogeneration (combinedcombined heat and power ("CHP"), integrated combined heat and power ("ICHP"), and combined cooling, heat and power)power ("CCHP"), resource recoveryas well as renewable energy, natural resources, and secure power. In addition, our microturbines can be used as battery charging generators for hybrid electric vehiclecritical power supply applications. Microturbines allow customers to produce power on-site in parallel with the electric grid or stand-alone when no utility grid is available. There are severalSeveral technologies which are used to provide “on-site"on-site power generation”generation" (also called “distributed generation”"distributed generation"), such as reciprocating engines, solar photovoltaic power ("PV"), wind powered systemsturbines and fuel cells. Our microturbines can be interconnected to other distributed energy resources to form "microgrids" (also called "distribution networks") located within a specific geographic area and provide power to a group of buildings. For customers who do not have access to the electric utility grid, microturbines can provide clean, on-siteon site power with lowerfewer scheduled maintenance intervals and greater fuel flexibility than competing technologies. For customers with access to the electric grid, microturbines can provide an additional source of continuous dutyon-site power generation, thereby providing additional reliability and potential cost savings.savings compared to the local utility. With our stand-alonestand alone feature, customers can produce their own energy in the event of a utility power outage and can use the microturbines as their primary source of power for extended periods.periods of time unlike traditional diesel standby generator sets. Because our microturbines also produce clean, usable heat energy, they provide economic advantages to customers who can benefit from the use of hot water, chilled water, air conditioning and heating.steam. In addition, our microturbines have been used as battery charging generators for hybrid electric vehicles and to provide power to a vessel's electrical loads in marine applications. Our microturbines are sold, installed and serviced primarily through our global distribution network. Together with our distributors, we offer new and remanufactured parts as well as a comprehensive Factory Protection Plan ("FPP") through long-term service agreements ranging from 5 to 20 years.

        We offer microturbines designed for commercial, industrial and onshore and offshore oil and gas applications with product offerings ranging from 30 kilowatts ("kW") to one megawatt ("MW") in electric power output, which can be deployed in arrays up to 10 MWs. Our microturbines combine patented air bearing technology, advanced combustion technology and sophisticated power electronics to form efficient and ultra-low emission electricity and cooling and heat production systems. Because of our air bearing technology, our microturbines do not require lube oil, grease, or traditional coolants. This means they do not require routine maintenance to change and dispose of lube oil, grease, or other liquid lubricants, as do the most common reciprocating engines. Our microturbines can be fueled by various sources, including natural gas, propane, butane, sour gas, renewable fuels such as landfill or digester gas, kerosene, diesel and biodiesel. Our microturbines are available with integrated unit mounted heat exchangers, making them easy to engineer and install in applications where hot water, chilled water, air conditioning and steam is desired.

        We sell microturbine units, components and accessories, as well as offer long-term microturbine rentals. We also remanufacture microturbine engines and provide new and remanufactured aftermarket spares parts, accessories, services, and comprehensive long-term service contracts for up to 20 years. Our microturbines are sold primarily through distributors and Original Equipment Manufacturers ("OEMs"). Distributors purchase our distributors.products for sale to end users and also provide service, application engineering and installation support. Distributors also provide a variety of additional services, including engineering the applications in which the microturbines will be used, installation support of the products at the end users' sites, commissioning the installed applications and providing post commissioning service, including a comprehensive FPP. Our distributors install the microturbines. Service is provided directly by us throughperform as independent value added resellers. OEMs integrate our Factory Protection Plan or by our distributors. Successful implementation of microturbines relies on the quality of the microturbine, marketability for appropriate applications, and the quality of the installation and support.products into their own product solutions.

        

OurThe address of our principal executive offices are located at 21211 Nordhoffis 16640 Stagg Street Chatsworth,in Van Nuys, California 9131191406 and our telephone number at that address is:is (818) 734-5300. Our web sitewebsite address is www.capstoneturbine.com.  Informationhttp://www.capstoneturbine.com. We do not incorporate the information on or accessible through our web site iswebsite into this prospectus, and you should not consider any information on, or that can be accessed through, our website as part of this prospectus.


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USE OF PROCEEDS

        

Unless we indicate otherwise in an accompanying prospectus supplement, we intend to useWe will not receive any of the net proceeds from the sale of the securitiesshares of our common stock offered and sold pursuant to this prospectus. The shares offered pursuant to this prospectus are currently not outstanding but are subject to issuance upon exercise of the Warrant held by the selling stockholder.

        If the Warrant is exercised on a cashless exercise basis, we will not receive any proceeds. Cashless exercise is described further below in "Selling Stockholder."

        If the Warrant is exercised for cash, we will receive $0.8859 per underlying share of common stock, which is the current exercise price for the Warrant. If cash exercise is elected, and assuming that the Warrant is exercised for all 4,046,337 shares of common stock covered by this prospectus, we would receive proceeds of $3,584,649.95, which we would use for general corporate purposes, which may include, but arepurposes.

        We, and not limited to, working capital, capital expenditures, acquisitionsthe selling stockholder, will pay the costs, expenses and repurchases or redemptions of securities.  When particular securities are offered, a prospectus supplement related to that offering will set forth our intended use offees in connection with the net proceeds received from the sale of those securities.  We will have significant discretion in the use of any net proceeds.  The net proceeds may be invested temporarily in short-term marketable securities or applied to repay indebtedness outstanding at that time until they are used for their stated purpose.

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RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth our consolidated ratio of earnings to fixed charges for the periods indicated:

 

 

Fiscal Year Ended March 31,

 

 

 

2011

 

2012

 

2013

 

2014

 

2015

 

Ratio of earnings to fixed charges (1)

 

N/A

 

N/A

 

N/A

 

N/A

 

N/A

 

Ratio of combined fixed charges and preference dividends to earnings (1)

 

N/A

 

N/A

 

N/A

 

N/A

 

N/A

 


(1) For the fiscal years ended March 31, 2011, 2012, 2013, 2014 and 2015, our earnings were inadequate to cover fixed charges. The coverage deficiencies were $38.3 million, $18.6 million, $21.9 million, $16.1 million and $31.4 million, respectively.

For purposes of calculating the ratios of earnings to fixed charges, (i) fixed charges consist of interest expensed and capitalized, amortized premiums, discounts and capitalized expenses related to indebtedness, and an estimate of the interest within rental expense; and (ii) earnings consist of pre-tax income from operations and fixed charges (excluding capitalized interest).

GENERAL DESCRIPTION OF SECURITIES WE MAY SELL

We, directly or through agents, dealers or underwriters that we may designate, may offer and sell, from time to time, up to $100,000,000 (or the equivalent in one or more foreign currency units) aggregate initial offering price of:

·shares of our Common Stock;

·warrants to purchase shares of our Common Stock;

·shares of our Preferred Stock;

·debt securities, which may be either senior debt securities or subordinated debt securities, in each case consisting of notes or other evidence of indebtedness;

·rights to purchase the foregoing securities (see “Plan of Distribution”); or

·any combination of these securities.

We may offer and sell these securities separately or together, in separate classes or series, each on terms to be determined at the time of the offering. We may issue debt securities and/or shares of Preferred Stock that are exchangeable for and/or convertible into Common Stock or any of the other securities that may be sold under this prospectus.  When particular securities are offered, a supplement to this prospectus will be delivered with this prospectus, which will describe the terms of the offeringregistration and sale of the offered securities.

shares covered by this prospectus, but the selling stockholder will pay all discounts, commissions or brokers' fees or fees of similar securities industry professionals and transfer taxes, if any, attributable to sales of the shares.

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DESCRIPTION OF CAPITAL STOCK



Table of ContentsGeneral

        

DESCRIPTION OF COMMON STOCK

Our authorized capital stock consists of 515,000,000 shares of Common Stock,common stock, $0.001 par value.value per share, and 10,000,000 shares of preferred stock, $0.001 par value per share. As of June 8, 2015July 25, 2019, there were 330,689,55673,404,338 shares of our Common Stockcommon stock outstanding, no shares of our preferred stock outstanding and 2,718,750 Series A warrants outstanding.

        

This section summarizesOn July 15, 2019, we filed a definitive proxy statement with the general termsSEC with respect to our annual meeting of stockholders to, among other proposals, consider the approval of a reverse stock split at a ratio that will be determined by our Board and that will be within a range of one-for-five (1:5) to one-for-ten (1:10). Our stockholders of record at the close of business on July 3, 2019 are entitled to vote at the annual meeting to be held on August 29, 2019 or any adjournments or postponements of the Common Stock that we may offer.  A prospectus supplement relating toannual meeting. If the Common Stock offeredreverse stock split is approved and implemented, the number of our issued and outstanding shares will statebe reduced based on the ratio and the number of shares offered the initial offering pricehereby and the marketnumber of shares subject to the Warrant and its exercise price dividend informationwill be proportionately adjusted. Our options, restricted stock units and any other relevant information.number of authorized shares of common stock will be similarly adjusted in accordance with their terms.

        The summaries in this section andfollowing summary description of our capital stock is based on the prospectus supplement do not describe every aspectprovisions of the Common Stock. When evaluating the Common Stock, you should also refer to our second amended and restated certificate of incorporation, ouras amended, fourth amended and restated bylaws, and the applicable provisions of the Delaware General Corporation Law. This summary does not purport to be complete and is qualified entirely by reference to the applicable provisions of our second amended and restated certificate of incorporation, fourth amended and restated bylaws, and the Delaware General Corporation Law ("DGCL"). For information on how to obtain copies of our amended and restated certificate of incorporation and fourth amended and restated bylaws, which are exhibits to the Stateregistration statement of Delaware (“DGCL”).which this prospectus is a part, see "Where You Can Find Additional Information" and "Incorporation of Certain Information by Reference."

Terms of the Common Stock

        

The holders of our Common Stockcommon stock are entitled to receive ratably, from funds legally available for the payment thereof, dividends when and as declared by resolution of our board of directors,Board, subject to any preferential dividend rights granted to the holders of any outstanding series of Preferred Stock.preferred stock. We currently intend to retain any earnings for use in our business and, therefore, we do not anticipate


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paying any cash dividends in the foreseeable future. We have never declared or paid any cash dividends on our capital stock. In the future, the decision to pay any cash dividends will depend upon our results of operations, financial condition and capital expenditure plans, as well as such other factors as our board of directors,Board, in its sole discretion, may consider relevant. In the event of our liquidation or dissolution, holders of our Common Stockcommon stock are entitled to share equally in all assets remaining after payment of liabilities and the liquidation preference of any outstanding series of Preferred Stock.preferred stock. The holders of our Common Stockcommon stock are entitled to one vote for each share held of record on all matters submitted to a vote of the stockholders. Cumulative voting for directors is not permitted, which means the holder or holders of more than one-half of the shares voting for the election of directors can elect all of the directors then being elected. Our board of directorsBoard is not divided into classes. Our second amended and restated certificate of incorporation and fourth amended and restated bylaws contain no provisions that would require greater than a majority of stockholders to approve mergers, consolidations, sales of a substantial amount of assets, or other similar transactions. Holders of our Common Stockcommon stock do not have preemptive rights to purchase shares of our Common Stock.common stock. The issued and outstanding shares of our Common Stockcommon stock are not subject to any redemption provisions and are not convertible into any other shares of our capital stock. All outstanding shares of our Common Stockcommon stock are, and any shares of Common Stockcommon stock issued will be, upon payment therefor, fully paid and nonassessable, which means that holders of our Common Stockcommon stock will have paid their purchase price in full and we may not require them to pay additional funds. The rights, preferences and privileges of holders of our Common Stockcommon stock are subject to those of the holders of any Preferred Stockpreferred stock that we may issue in the future.

Anti-Takeover Considerations and Special Provisions of Delaware Law, our Second Amended and Restated Certificate of Incorporation and our Amended and Second Restated Bylaws

Rights Agreement

        

StockholderOn May 6, 2019, we and Broadridge Financial Solutions, Inc. successor-in-interest to Computershare Inc., as Rights Plan

On July 7, 2005, weAgent, entered into a rights agreement with BNY Mellon Investor Services LLC,Rights Agreement (the "NOL Rights Agreement") designed to diminish the risk that our ability to use our net operating losses and certain other tax assets (the "Tax Benefits") to reduce potential future federal income tax obligations would become subject to limitations by reason of us experiencing an "ownership change," as rights agent.  Computersharedefined in Section 382 of the Internal Revenue Code of 1986, as amended. The NOL Rights Agreement replaces the Company's Rights Agreement, dated May 6, 2016, by and between the Company and Broadridge Financial Solutions, Inc. subsequently became rights agent, as successor-in-interest to BNY Mellon Investor Services LLC.Computershare Inc., as rights agent (the "Original Rights Agreement"). While this NOL Rights Agreement is intended to preserve our net operating losses, it effectively deters current and future purchasers from becoming 4.99% stockholders. The rights agreement was subsequently amended on July 3, 2008, June 9, 2011, July 1, 2014, and August 5, 2014.NOL Rights Agreement could also make it more difficult for a third party to acquire us, even if doing so would benefit our stockholders.

        In connection with the rights agreement, our board of directorsNOL Rights Agreement, the Board authorized and declared a dividend distribution of one Preferred Stockpreferred stock purchase right (a "New Right") for each share of our Common Stockcommon stock authorized and outstanding at the close of business on July 18, 2005.outstanding. Each rightNew Right entitles the registered holder to purchase from us a unit consisting of one one-hundredthone-thousandth of a share of Series AB Junior Participating Preferred Stock, par value $0.001 per share, at a purchase price of $10.00$5.22 per unit, subject to adjustment.

        The description and terms of the rights are set forth in the rights agreement.  The rights are attached to all Common Stock certificates.  Subject to certain exceptions specified in the rights agreement, the rightsNew Rights will separate from the Common Stock and willnot be exercisable uponuntil the earlier to occur of (i) 10 days followingthe close of business on the tenth business day after a public announcement or filing that a person has, or group of affiliated or associated persons or persons acting in concert have, become an "Acquiring Person," which is defined as a person or group of affiliated or associated persons (the “Acquiring Person”) hasor persons acting in concert who, at any time after the date of the NOL Rights Agreement, have acquired, or obtained the right to acquire, beneficial ownership of 20%4.99% or more of theour outstanding shares of Common Stock, other than as a result of repurchases ofcommon stock, by the Companysubject to certain exceptions or certain inadvertent actions by institutional or certain other stockholders, or (ii) 10 days (or such later date as our board of directors shall determine) following the commencement of a tender offer or exchange offer (other than certain permitted offers described in the rights agreement) that would result in a person or group beneficially owning 20% or more of the outstanding shares of our Common Stock.

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In the event that we receive a qualifying offer (that has not been terminated prior thereto and which continues to be a qualifying offer), stockholders representing at least 10% of the shares of Common Stock then outstanding may request that the board of directors call a special meeting of stockholders to vote to exempt the qualifying offer from the operation of the rights agreement not earlier than 90, nor later than 120, business days following the commencement of such offer. The board of directors must then call and hold such a meeting to vote on exempting such offer from the terms of the rights agreement within the 90th business day following receipt of the stockholder demand for the meeting; provided that such period may be extended if, prior to the vote, we enter into an agreement (that is conditioned on the approval by the holders of not less than a majority of the outstanding shares of Common Stock) with respect to a merger, recapitalization, share exchange or a similar transaction involving the Company or the direct or indirect acquisition of more than 50% of our consolidated total assets, until the time of the meeting at which the stockholders will be asked to vote on such agreement. If no Acquiring Person has emerged, the offer continues to be a qualifying offer and stockholders representing at least a majority of the shares of Common Stock represented at the meeting at which a quorum is present vote in favor of redeeming the rights, then such qualifying offer shall be deemed exempt from the rights agreement on the date that the vote results are certified. If no Acquiring Person has emerged and no special meeting is held by the date required, the rights will be redeemed, without the need for action by the board of directors, at the close of business on the tenth business day following that date.after the commencement of, or announcement of an intention to commence, a tender offer or exchange offer the consummation of


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Pursuantwhich would result in any person becoming an Acquiring Person (the earlier of such dates being called the "Distribution Date"). Certain synthetic interests in securities created by derivative positions, whether or not such interests are considered to be ownership of the underlying common stock or are reportable for purposes of Regulation 13D of the Exchange Act, are treated as beneficial ownership of the number of shares of common stock equivalent to the “sunset provision,”economic exposure created by the rights agreementderivative position, to the extent actual shares of the common stock are directly or indirectly held by counterparties to the derivatives contracts.

        The New Rights, which are not exercisable until the Distribution Date, will expire onprior to the 30thearliest of (i) May 6, 2022 or such later day afteras may be established by the 2017Board prior to the expiration of the New Rights, provided that the extension is submitted to the Company's stockholders for ratification at the next annual meeting of stockholders unless continuation of the rights agreement is approvedCompany succeeding such extension; (ii) the time at which the New Rights are redeemed pursuant to the NOL Rights Agreement; (iii) the time at which the New Rights are exchanged pursuant to the NOL Rights Agreement; (iv) the time at which the New Rights are terminated upon the occurrence of certain transactions; (v) the close of business on the first day after the Company's 2019 annual meeting of stockholders, if approval by the stockholders at that meeting. The rights are intended to protect our stockholders in the event of an unfair or coercive offer to acquire the Company.  The rights, however, should not affect any prospective offeror willing to make an offer at a fair price and otherwise in the best interests of the Company of the NOL Rights Agreement has not been obtained on or prior to the close of business on the first day after the Company's 2019 annual meeting of stockholders; (vi) the close of business on the effective date of the repeal of Section 382, if the Board determines that the NOL Rights Agreement is no longer necessary or desirable for the preservation of Tax Benefits; and its stockholders, as determined by(vii) the boardclose of directors.  The rights should also not interfere with any merger or other business combination approved byon the boardfirst day of directors.a taxable year of the Company to which the Board determines that no Tax Benefits are available to be carried forward.

Delaware Anti-Takeover Law

        

We are subject to the provisions of Section 203 of the DGCL, which regulates corporate takeovers. This section prevents Delaware corporations, under certain circumstances, from engaging in a “business combination”"business combination" with:

·

    a stockholder who owns 15% or more of our outstanding voting stock (otherwise known as an interested stockholder);

    ·

    an affiliate of an interested stockholder; or

    ·

    an associate of an interested stockholder,

for three years following the date that the stockholder became an interested stockholder.

        

Section 203 of the DGCL defines “business combination”"business combination" to include:

·

    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 of any class or series of the corporation beneficially owned by the interested stockholder; or

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·

the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits provided by or through the corporation.

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However, the above provisions of Section 203 do not apply if:

·

    our board of directorsBoard approves the transaction that made the stockholder an interested stockholder, prior to the date of that transaction;

    ·

    upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, that stockholder owned at least 85% of our voting stock outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding shares owned by persons who are directors and also officers; or

    ·

    on or subsequent to the date of the transaction, the business combination is approved by our board of directorsBoard and authorized at a meeting of our stockholders by an affirmative vote of at least two-thirds of the outstanding voting stock not owned by the interested stockholder.

        

This statute could prohibit or delay mergers or other change in control attempts, and thus may discourage attempts to acquire us.

Second Amended and Restated Certificate of Incorporation and Fourth Amended and Restated Bylaws

        

A number of provisions of our second amended and restated certificate of incorporation and our fourth amended and restated bylaws concern matters of corporate governance and the rights of our stockholders. Provisions that grant our board of directorsBoard the ability to issue shares of Preferred Stockpreferred stock and to set the voting rights, preferences and other terms thereof may discourage takeover attempts that are not first approved by our board of directors,Board, including takeovers that may be considered by some stockholders to be in their best interests, such as those attempts that might result in a premium over the market price for the shares held by stockholders. Certain provisions could delay or impede the removal of incumbent directors even if such removal would be beneficial to our stockholders. These provisions also could discourage or make more difficult a merger, tender offer or proxy contest, even if they could be favorable to the interests of stockholders, and could potentially depress the market price of our Common Stock.common stock. Our board of directorsBoard believes that these provisions are appropriate to protect our interests and the interests of our stockholders.

Meetings of and Actions by StockholdersStockholders..    Our fourth amended and restated bylaws provide that annual meetings of our stockholders may take place at the time and place designated by our board of directors.Board. A special meeting of our stockholders may be called at any time by the chairman of the board of directors,Board, or by a majority of the directors or by a committee of the board of directorsBoard that has been granted the power to call such meetings. Stockholders may take action only at a regular or special meeting of stockholders and not by written consent without a meeting.

Cumulative VotingVoting..    Our fourth amended and restated bylaws expressly deny stockholders the right to cumulative voting in the election of directors.

Advance Notice Requirements for Stockholder Proposals and Director NominationsNominations..    Our fourth amended and restated bylaws provide that stockholders seeking to bring business before an annual meeting of stockholders or to nominate candidates for election as directors at an annual meeting of stockholders must provide timely notice in writing. To be timely, a stockholder’sstockholder's notice must be delivered to our principal executive offices not less than 120 days prior to the first anniversary of the date Capstone’sCapstone's proxy statement was released to security holders in connection with the preceding year’syear's annual meeting. If no annual meeting was held in the previous year or the date of the annual meeting has been changed by more than 30 days from the date contemplated at the time of the previous year’syear's proxy statement, notice by the stockholder in order to be timely must be received by Capstone no later than the close of business on the tenth day following the day on which notice of the date of the meeting was mailed or public announcement of the date the meeting was made, whichever comes first. Our fourth amended and restated bylaws also specify requirements as to the form and


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content of a stockholder’sstockholder's notice. These provisions may preclude stockholders from bringing matters before an annual meeting of stockholders or from making nominations for directors at an annual meeting of stockholders.

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Filling of Board VacanciesVacancies..    Our second amended and restated certificate of incorporation and our fourth amended and restated bylaws provide that vacancies in the board of directorsBoard may be filled until the next annual meeting of stockholders by a majority of the directors remaining in office, even though that number may be less than a quorum of the board of directors,Board, or by a sole remaining director.

Amendment of the Certificate of IncorporationIncorporation..    Our second amended and restated certificate of incorporation may be amended, altered, changed or repealed in the manner prescribed by the DGCL. However, no amendment, alteration, change or repeal may be made with respect to Article V (amendment of the bylaws by the stockholders), Article VI (number of directors), Article VII (term of office of directors after an increase or decrease in the number of directors), Article IX (action by stockholders), Article X (calling of special meetings of the stockholders) or Article XI (amending the second amended and restated certificate of incorporation) without the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-2/3%) of the outstanding voting stock of the corporation, voting together as a single class.

Amendment of the BylawsBylaws..    Our fourth amended and restated bylaws may be rescinded, altered, amended or repealed, and new bylaws may be made (i) by the board of directors,Board, by vote of a majority of the number of directors then in office as directors, acting at any meeting of the board of directors,Board, or (ii) by the stockholders, by the affirmative vote of the holders of sixty-six and two-thirds percent (66-2/3%) of the outstanding voting stock of the corporation, voting together as a single class, at any annual or special meeting of stockholders, provided that notice of such proposed amendment, modification, repeal or adoption is given in the notice of the annual or special meeting. The bylaws can only be amended if such amendment would not conflict with the certificate of incorporation. Any bylaw made or altered by the requisite number of stockholders may be altered or repealed by the board of directorsBoard or by the requisite number of stockholders.

Limitations on Liability and Indemnification of Officers and Directors

        

We have adopted provisions in our second amended and restated certificate of incorporation and fourth amended and restated bylaws which require us, to the fullest extent permitted by the DGCL, to indemnify all directors and officers of Capstone against any liability and to advance indemnification expenses on behalf of all directors and officers of Capstone. In addition, our fourth amended and restated bylaws provide that we may, at the discretion of the board of directors,Board, indemnify any person who is a party to any threatened, pending or completed action, suit or proceeding or threatened to be made such a party by reason of the fact that such person is or was an employee or agent of Capstone or is or was serving at Capstone’sCapstone's request as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise. To the full extent permitted by law, the indemnification provided under the fourth amended and restated bylaws shall include expenses (including attorneys’attorneys' fees), judgments, fines and amounts paid in settlement, and, in the manner provided by law, any such expenses may be paid by Capstone in advance of the final disposition of such action, suit or proceeding. The indemnification provided under the fourth amended and restated bylaws shall not be deemed to limit our right to indemnify any other person for any such expenses to the full extent permitted by law, nor shall it be deemed exclusive of any other rights to which any person seeking indemnification from Capstone may be entitled under any agreement, vote of stockholders or disinterested directors or otherwise, both as to action in his official capacity and as to action in another capacity while holding such office.

        

The second amended and restated certificate of incorporation further requires us to limit, to the fullest extent permitted by the DGCL, the liability for monetary damages of directors of Capstone for


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actions or inactions taken by them as directors. Our second amended and restated certificate of incorporation and fourth amended and restated bylaws also empower us, to the fullest extent permitted by the DGCL, to purchase and maintain insurance on behalf of any such person against any liability which may be asserted.

        

The limitation of liability and indemnification provisions in our second amended and restated certificate of incorporation and fourth amended and restated bylaws may discourage stockholders from bringing a lawsuit against directors for breaches of their fiduciary duty. They may also have the effect of reducing the likelihood of derivative litigation against directors and officers, even though an action of this kind, if successful, might otherwise benefit us and our stockholders. Furthermore, a stockholder’sstockholder's investment may be adversely affected to the extent we pay the costs of settlement and damage awards against directors and officers pursuant to these indemnification provisions. However, we believe that these indemnification provisions are necessary to attract and retain qualified directors and officers.

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Table of ContentsPreferred Stock

        

Transfer Agent and Registrar

Computershare Inc. is the transfer agent and registrar for our Common Stock.

DESCRIPTION OF COMMON STOCK WARRANTS

We may issue warrants for the purchase of Common Stock. Common Stock warrants may be issued independently or together with any other securities pursuant to any prospectus supplement and may be attached to or separate from such securities. Each series of Common Stock warrants will be issued under a separate warrant agreement between us and the warrant recipient or, if the recipients are numerous, a warrant agent identified in the applicable prospectus supplement. The warrant agent, if engaged, will act solely as our agent in connection with the Common Stock warrants of such series and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of Common Stock warrants. Further terms of the Common Stock warrants and the applicable warrant agreements will be set forth in the prospectus supplement.

The applicable prospectus supplement will describe the terms of any Common Stock warrants in respect of which this prospectus is being delivered, including, where applicable, the following:

·the title of such Common Stock warrants;

·the aggregate number of such Common Stock warrants;

·the price or prices at which such Common Stock warrants will be issued;

·the designation, number and terms of the shares of Common Stock purchasable upon exercise of such Common Stock warrants;

·the date, if any, on and after which such Common Stock warrants and the related Common Stock will be separately transferable;

·the price at which each share of Common Stock purchasable upon exercise of such Common Stock warrants may be purchased;

·the minimum or maximum amount of such Common Stock warrants that may be exercised at any one time;

·any provisions for adjustment of the number or amount of shares of Common Stock receivable upon exercise of the Common Stock warrants or the exercise price of the Common Stock warrants;

·the dates or periods during which the Common Stock warrants are exercisable;

·the designation and terms of any securities with which the Common Stock warrants are issued;

·the rights, if any, we have to redeem the Common Stock warrants;

·if the exercise price is not payable in U.S. dollars, the foreign currency, currency unit or composite currency in which the exercise price is denominated;

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·any terms, procedures and limitations relating to the transferability, exchange or exercise of the Common Stock warrants;

·the name of the warrant agent;

·information with respect to book-entry procedures, if any;

·a discussion of certain federal income tax considerations applicable to the Common Stock warrants; and

·any other material terms of such Common Stock warrants.

Each Common Stock warrant will entitle the holder of warrants to purchase the number of shares of Common Stock at the exercise price stated or determinable in the prospectus supplement for the Common Stock warrants. Common Stock warrants may be exercised at any time up to the close of business on the expiration date shown in the applicable prospectus supplement, unless otherwise specified in such prospectus supplement.  After the close of business on the expiration date, unexercised Common Stock warrants will become void.  Common Stock warrants may be exercised as described in the applicable prospectus supplement. When the warrant holder makes the payment and properly completes, signs and delivers the warrant agreement and notice of exercise at the corporate trust office of the warrant agent or any other office indicated in a prospectus supplement, we will, as soon as possible, forward the shares of Common Stock that the warrant holder has purchased. If the warrant holder exercises the Common Stock warrant for less than all of the shares of Common Stock represented by the warrant, we will issue a new warrant to purchase the remaining shares of Common Stock.

You should review the section captioned “Description of Common Stock” for a general description of the Common Stock that may be issued upon the exercise of the Common Stock warrants.

DESCRIPTION OF PREFERRED STOCK

General

We are authorized to issue 10,000,000 shares of Preferred Stock, and no shares of Preferred Stock are currently issued and outstanding.  Pursuant to and in accordance with the Stockholder Rights Plan, 5,150,000 shares of our Preferred Stock have been designated as Series A Junior Participating Preferred Stock pursuant to a Certificate of Designation, Preferences and Rights, as amended. Our Preferred Stock may be issuedpreferred stock from time to time, in one or more series, each series to be appropriately designated by a distinguishing letter or title, prior toseries. Of the issue of any10,000,000 shares of preferred stock authorized, 60,000 shares have been designated as Series B Junior Participating Preferred Stock.

The following description of Preferred Stock sets forth someremainder are undesignated as to preferences, privileges and restrictions. Our Board will determine the rights, preferences and privileges of the general terms and provisions of the Preferred Stock that may be specified in any prospectus supplement. Certain other terms of any series of Preferred Stock (which terms may be different than those stated below) will be described in the prospectus supplement to which such series relates. The statements below describing the Preferred Stock are in all respects subject to and qualified in their entirety by reference to the applicable provisions of the prospectus supplement, our Second amended and restated certificate of incorporation (including the amendment describing the designations, rights, and preferencesshares of each wholly unissued series, of Preferred Stock) and amended and restated bylaws.

Subject to limitations prescribed by the DGCL and our second amended and restated certificate of incorporation, our board of directors is authorized to fix or alter the dividend rights, dividend rate, conversion rights, voting rights, rights and terms of redemption (including sinking fund provisions, if any), the redemption price or prices, the liquidation preferences, any other designations, preferences and relative, participating, optional or other special rights, and any qualifications, limitations or restrictions thereon, including dividend rights, conversion rights, preemptive rights, terms of any series of Preferred Stock,redemption or repurchase, liquidation preferences, sinking fund terms and the number of shares constituting any such series andor the designation thereof. The Preferred Stock will, when issued, be fully paid and nonassessable and will have no preemptive rights.of any series.

        

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TableOn May 9, 2016, we filed a Certificate of Contents

The applicable prospectus supplement will containDesignations with the specific terms relating to the Preferred Stock being offered, including:

·the title and stated valueState of such Preferred Stock;

·the number ofDelaware which designates 60,000 shares of suchour preferred stock as Series B Junior Participating Preferred Stock offered, the liquidation preference perStock. Each share and the offering price of such Preferred Stock;

·the dividend rate or rate(s), period(s) or method of calculating the rates and the dates on which dividends will be payable applicable to such Preferred Stock;

·whether dividends will be cumulative or noncumulative, and, if cumulative, the date from which dividends on such Preferred Stock shall accumulate, if applicable;

·the provision for a sinking fund, if any, and the provisions for redemption, if applicable, of such Preferred Stock;

·any listing of such Preferred Stock on any securities exchange;

·the terms and conditions, if applicable, upon which suchSeries B Junior Participating Preferred Stock will be convertible into our Common Stock, including the conversion price (or manner of calculating the conversion price) and the conversion period;

·the terms and conditions, if applicable, upon which the Preferred Stock being offered will be exchangeable for debt securities, including the exchange price, or the manner of calculating the exchange price, and the exchange period;

·the voting rights, if any, of the holders of shares of the Preferred Stock being offered;

·a discussion of certain federal income tax considerations applicable to such Preferred Stock;

·the relative ranking and preferences of such Preferred Stock as to dividend rights and rights upon our liquidation, dissolution or winding up of affairs;

·any limitations on issuance of any class or series of Preferred Stock ranking senior to or on a parity with such series of Preferred Stock as to dividend rights and rights upon liquidation, dissolution or winding up of affairs;

·any limitations on our ability to take certain actions without the consent of a specified number of holders of Preferred Stock; and

·any other additional material terms, preferences, rights, qualifications limitations or restrictions of such Preferred Stock.

Ranking

Unless otherwise specified in the prospectus supplement, the Preferred Stock will, with respect to dividend rights and rights upon our liquidation, dissolution or winding up, rank:

·senior to all existing and future classes or series of Common Stock, and to all equity securities and any future series of Preferred Stock ranking junior to such Preferred Stock;

·on a parity with all equity securities the terms of which specifically provide that such equity securities rank on a parity with the Preferred Stock; and

·junior to all equity securities the terms of which specifically provide that such equity securities rank senior to the Preferred Stock.

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Dividends

Holders of Preferred Stock of each series shall be entitled, to receive, when, as and if declared, by our board of directors, out of our assets legally available for payment, cash dividends (or dividends in additional shares of Preferred Stock or in other property if expressly permitted and described in the applicable prospectus supplement) at the rates and on the dates set forth in the applicable prospectus supplement. Dividend rates may be fixed or variable or both. Different series of Preferred Stock may be entitled to dividends at different dividend rates or based upon different methods of determination. Each dividend shall be payable to holders of record as they appear on our stock transfer books on such record dates as shall be fixed by the board of directors.

Dividends on any series of Preferred Stock may be cumulative or non-cumulative, as provided in the applicable prospectus supplement. Dividends, if cumulative, will be cumulative from and after the date set forth in the prospectus supplement. If the board of directors fails to declare a dividend payable on apreferential per share quarterly dividend payment date on any series of Preferred Stock for which dividends are non-cumulative, then the holders of such series of Preferred Stock will have no right to receive a dividend in respect of the dividend period ending on such dividend payment date, and we will have no obligation to pay the dividend accrued for such period, whether or not dividends on such series are declared payable on any future dividend payment date.

Unless otherwise specified in the applicable prospectus supplement, if any Preferred Stock of any series is outstanding, no full dividends shall be declared or paid or set apart for payment on the Preferred Stock of any other series ranking, as to dividends, on a parity with or juniorequal to the Preferred Stockgreater of such series for any period unless full dividends (which include all unpaid dividends in the case of cumulative dividend Preferred Stock) have been or contemporaneously are declared and paid or declared and a sum sufficient for the payment thereof set apart for such payment on the Preferred Stock of such series.

When dividends are not paid in full (or a sum sufficient for such full payment is not so set apart) upon the Preferred Stock of any series and the shares of any other series of Preferred Stock ranking on a parity as to dividends with the Preferred Stock of such series, all dividends declared upon shares of Preferred Stock of such series and any other series of Preferred Stock ranking on a parity as to dividends with such Preferred Stock shall be declared pro rata among the holders of such series, so that the amount of dividends declared(i) $1.00 per share on that series of Preferred Stock and on each other series of Preferred Stock having the same rank as that series of Preferred Stock will bear the same ratio to each other that accrued dividends per share on that series of Preferred Stock and the other series of Preferred Stock bear to each other. No interest, or sum of money in lieu of interest, shall be payable in respect of any dividend payment or payments on Preferred Stock of such series which may be in arrears.

Until required dividends are paid, no dividends (other than in Common Stock or other capital stock ranking junior to the Preferred Stock of such series as to dividends and upon liquidation) shall be declared or paid or set aside for payment or other distribution shall be declared or made upon the Common Stock or any other capital stock ranking junior to or on a parity with the Preferred Stock of such series as to dividends or upon liquidation. In addition, no Common Stock or any other capital stock ranking junior to or on a parity with the Preferred Stock of such series as to dividends or upon liquidation shall be redeemed, purchased or otherwise acquired for any consideration (or any moneys be paid to or made available for a sinking fund for the redemption of any shares of any such stock) by us (except by conversion into or exchange for other capital stock ranking junior to the Preferred Stock of such series as to dividends and upon liquidation).

Any dividend payment made of a series of Preferred Stock shall first be credited against the earliest accrued but unpaid dividend due with respect to shares of Preferred Stock of such series which remains payable.

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Redemption

If so provided in the applicable prospectus supplement, any series of Preferred Stock may be subject to mandatory redemption or redemption at our option, as a whole or in part, in each case upon the terms, at the times and at the redemption prices set forth in such prospectus supplement.

The prospectus supplement relating to a series of Preferred Stock that is subject to redemption will specify the number of shares of such Preferred Stock that we shall redeem in each year commencing after a date to be specified, at a redemption price per share to be specified, together with(ii) an amount equal to all accrued and unpaid dividends thereon (which shall not, if such Preferred Stock does not have a cumulative1,000 times the dividend include any accumulation in respectdeclared per share of unpaid dividends for prior dividend periods) to the datecommon stock. Each share of redemption. We may pay the redemption price in cash, stock or other securities of third parties, or other property, as specified in the prospectus supplement. If the redemption price for Preferred Stock of any series is payable only from the net proceeds of our issuance of capital stock, the terms of such Preferred Stock may provide that, if no such capital stock shall have been issued or to the extent the net proceeds from any issuance are insufficient to pay in full the aggregate redemption price then due, such Preferred Stock shall automatically be converted into shares of the applicable capital stock pursuant to conversion provisions specified in the applicable prospectus supplement.

So long as any dividends on any series of Preferred Stock ranking on a parity as to dividends and distributions of assets with such series of the Preferred Stock are in arrears, no shares of any such series of theSeries B Junior Participating Preferred Stock will be redeemed (whether by mandatory or optional redemption) unless all such shares are simultaneously redeemed, and we will not purchase or otherwise acquire any such shares. Unlessentitle the full cumulative dividendsholder thereof to 1,000 votes on all outstandingmatters submitted to a vote of the stockholders of the Company. In the event of any merger, consolidation or other transaction in which shares of any cumulative Preferred Stockcommon stock are converted or exchanged, each share of such series and any other stock of Capstone ranking on a parity with such series as to dividends and upon liquidation shall have been paid or contemporaneously are declared and paid for all past dividend periods, we shall not purchase or otherwise acquire directly or indirectly any Preferred Stock of such series (except by conversion into or exchange for stock ranking junior to the Preferred Stock of such series as to dividends and upon liquidation). However, this will not prevent the purchase or acquisition of such Preferred Stock pursuant to a purchase or exchange offer made on the same terms to holders of all outstanding shares of Preferred Stock of such series.

If we are to redeem fewer than all of the outstanding Preferred Stock of any series, whether by mandatory or optional redemption, our board of directors will determine the number of shares to be redeemed and the method for selecting shares to be redeemed, which may be by lot or pro rata from the holders of record of such shares in proportion to the number of such shares held by such holders (with adjustments to avoid redemption of fractional shares) or any other equitable method determined by us that will not result in the issuance of any excess shares.

We will mail a notice of redemption at least 30 days but not more than 60 days before the redemption date to each holder of record of Preferred Stock of any series to be redeemed. If notice of redemption of any Preferred Stock has been given and we have set aside the funds necessary for such redemption in trust for the benefit of the holders of any Preferred Stock so called for redemption, then from and after the redemption date, dividends will cease to accrue on shares of Preferred Stock called for redemption, such Preferred Stock shall no longer be deemed outstanding and all rights of the holders of such shares will terminate, except the right to receive the redemption price (without interest).

Liquidation Preference

Upon any voluntary or involuntary liquidation, dissolution or winding up of our affairs, after distributions or payment to holders of any equity securities ranking senior to such series of Preferred Stock, before any distribution or payment shall be made to the holders of Common Stock, or any other class or series of our capital stock ranking junior to a series of the Preferred Stock in the distribution of assets upon any liquidation, dissolution or winding up, the holders of such series ofSeries B Junior Participating Preferred Stock will be entitled to receive out of our assets legally available for distribution to stockholders liquidating distributions in1,000 times the amount received per one share of the liquidation preference per share (set forth in the applicable prospectus supplement), plus an amount equal to all dividends accrued and unpaid thereon (which shall not include any accumulation in respect of unpaid dividends for prior dividend periods if such Preferred Stock does not have a cumulative dividend). After payment of the full amount of the liquidatingcommon stock.

        

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distributions to which they are entitled, the holders of Preferred Stock will have no right or claim to any of our remaining assets. In the event that, upon any such voluntary or involuntary liquidation, dissolution or winding up, our legally available assets are insufficient to pay the amount of the liquidating distributions on all outstanding Preferred Stock and the corresponding amounts payable on all shares of other classes or series of capital stock ranking on a parity with the Preferred Stock in the distribution of assets upon liquidation, dissolution or winding up, then the holders of the Preferred Stock and all other such classes or series of capital stock shall share ratably in any such distribution of assets in proportion to the full liquidating distributions to which they would otherwise be respectively entitled.

If liquidating distributions have been made in full to all holders of Preferred Stock, our remaining assets shall be distributed among the holders of any other classes or series of capital stock ranking junior to the Preferred Stock upon liquidation, dissolution or winding up, according to their respective rights and preferences and in each case according to their respective number of shares. After the holders of each series of Preferred Stock having the same rank are paid in full, they will have no right or claim to any of our remaining assets.

Voting Rights

Holders of Preferred Stock may have voting rights as are set forth below or as otherwise from time to time required by law or as indicated in the applicable prospectus supplement.

Unless otherwise indicated in the prospectus supplement, if we issue full shares ofsell any series of Preferred Stock, each sharepreferred stock under this prospectus, we will be entitled to one vote on matters on which holders of that series of Preferred Stock are entitled to vote.  The voting power of that series will depend onfix the number of shares in that series of Preferred Stockrights, preferences and not on the aggregate liquidation preference or initial offering priceprivileges of the shares of that series. Unless otherwise indicated in a prospectus supplement, holders of our Preferred Stock do not vote on matters submitted for a vote of our common shareholders.

Any series of Preferred Stock may provide that, so long as any sharespreferred stock of such series, remain outstanding,as well as any qualifications, limitations or restrictions thereon, in the holders of such series may vote as a separate class on certain specified matters, which may include changes in our capitalization, amendments to our second amended and restated certificate of incorporation, our amended and restated bylaws and mergers and dispositions. The foregoing voting provisions may not apply if, at or prior to the time when the act with respect to which such vote would otherwise be required shall be effected, all outstanding shares of such series of Preferred Stock shall have been redeemed or called for redemption upon proper notice and sufficient funds shall have been irrevocably deposited in trust to effect such redemption.

The provisions of a series of Preferred Stock may provide for additional rights, remedies, and privileges if dividends on such series are in arrears for specified periods, which rights and privileges will be described in the applicable prospectus supplement.

Conversion Rights

The terms and conditions, if any, upon which shares of any series of Preferred Stock are convertible into Common Stock will be set forth in the prospectus supplement relating thereto. Such terms will include the number of shares of Common Stock or any other series of Preferred Stock or other securities or property into which the Preferred Stock is convertible, the conversion price (or manner of calculation thereof), the conversion period, provisions as to whether conversion will be at the option of the holders of the Preferred Stock or us, the events requiring an adjustment of the conversion price and provisions affecting conversion in the event of the redemption of such Preferred Stock.

Permanent Global Preferred Securities

A series of Preferred Stock may be issued in whole or in part in the form of one or more global securities that will be deposited with a depositary or its nominee identified in the related prospectus supplement.  For most series of Preferred Stock, the depositary will be The Depository Trust Company.  A global security may not be transferred except as a whole to the depositary, a nominee of the depositary or their successors unless it is exchanged in whole or in part for Preferred Stock in individually certificated form. Any additional terms of the depositary arrangement with respect to any series of Preferred Stock and the rights of and limitations on owners of beneficial interests in a global security representing a series of Preferred Stock may be described in the related prospectus supplement.

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DESCRIPTION OF DEBT SECURITIES

We may issue, from time to time, debt securities in one or more series that will consist of either our senior debt or our subordinated debt under one or more trust indentures to be executed by us and a specified trustee. The terms of the debt securities will include those stated in the indenture and those made a part of the indenture (and may be amended by supplements) by reference to the Trust Indenture Act of 1939. The indentures will be qualified under the Trust Indenture Act. Debt securities, whether senior or subordinated, may be issued as convertible debt securities or exchangeable debt securities.

The following description sets forth certain anticipated general terms and provisions of the debt securities to which any prospectus supplement may relate. The particular terms of the debt securities offered by any prospectus supplement (which terms may be different than those stated below) and the extent, if any, to which such general provisions may apply to the debt securities so offered will be described in the prospectus supplementdesignation relating to such debt securities. Accordingly, for a description of the terms of a particular issue of debt securities, investors should review both the prospectus supplement relating thereto and, except to the extent it conflicts with any prospectus supplement, the following description. Forms containing terms we anticipate would be similar to the senior indenture (as discussed herein) and the subordinated indenture (as discussed herein) are includedthat series. We will file as exhibitsan exhibit to the registration statement of which this prospectus is a part.

General

The debt securitiespart, or will be our direct obligations and may be either senior debt securities or subordinated debt securities. The indebtedness representedincorporate by subordinated securities will be subordinated in right of payment to the prior payment in full of our senior debt (as defined in the applicable indenture). Senior securities and subordinated securities will be issued pursuant to separate indentures (respectively, a senior indenture and a subordinated indenture), in each case between us and a trustee. Debt securities issued by us will be structurally subordinated to all indebtedness and other liabilities of our subsidiaries, except to the extent any such subsidiary guarantees or is otherwise obligated to make payment on such debt securities.

Except as set forth in the applicable indenture and described in a prospectus supplement relating thereto, the debt securities may be issued without limit as to aggregate principal amount, in one or more series, secured or unsecured, in each case as establishedreference from time to time in or pursuant to authority granted by a resolution of our board of directors or as established in the applicable indenture. All debt securities of one series need not be issued at the time and, unless otherwise provided, a series may be reopened, without the consent of the holders of the debt securities of such series, for issuance of additional debt securities of such series. The indentures providereports that we may issue debt securities infile with the SEC, the form of any currency or currency unit designated by us.  Except for the limitations on consolidation, merger and salecertificate of all or substantially all of our assets contained in the indentures,designation that describes the terms of the indentures do not contain any covenants or other provisions designedseries of preferred stock we are offering before the issuance of that series of preferred stock. We urge you to afford holders of any debt securities protection with respect to our operations, financial condition or transactions involving us.

Theread the applicable prospectus supplement relatingand any free writing prospectus that we may authorize to anybe provided to you related to the series of debt securitiespreferred stock being offered, will containas well as the specific terms thereof, including, without limitation:

·the titlecomplete certificate of such debt securities and whether such debt securities are senior securities or subordinated securities anddesignation that contains the terms of any such subordination;the applicable series of preferred stock.

        

·the aggregate principal amount of such debt securities and any limit on such aggregate principal amount;

·the percentageThe General Corporation Law of the principal amount at which such debt securitiesState of Delaware, the state of our incorporation, provides that the holders of preferred stock will be issuedhave the right to vote separately as a class (or, in some cases, as a series) on an amendment to our amended and restated certificate of incorporation if other than the principal amount thereof,amendment would change the portionpar value, the number of authorized shares of the principal amount thereof payable upon declaration of accelerationclass or the powers, preferences or special rights of the maturity thereof,class or (if applicable)series so as to adversely affect the portionclass 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 the principal amount of such debt securities which is convertible into Common Stock or Preferred Stock, and the method by which any such portion shall be determined;designation.

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        Our Board 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 our 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 our control and may adversely affect the market price of the common stock and the voting and other rights of the holders of common stock. Additionally, the issuance of preferred stock may have the effect of decreasing the market price of our common stock.

·the date or dates, or the method for determining the date or dates, on which the principal of such debt securities will be payable;Transfer Agent and Registrar

        Our transfer agent and registrar for our common stock is Broadridge Corporate Issuer Solutions, Inc., 1717 Arch St., Suite 1300, Philadelphia, Pennsylvania 19103.

·Listing

        Our common stock is listed on the rateNasdaq Capital Market, under the symbol "CPST."


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SELLING STOCKHOLDER

        We have prepared this prospectus to allow the selling stockholder to sell or rates (which may be fixed or variable)otherwise dispose of, from time to time, up to 4,046,337 shares of our common stock.

        On February 4, 2019 we entered into the Note Purchase Agreement in connection with the sale of senior secured notes of the Company in a private placement exempt from registration under the Securities Act. Under the Note Purchase Agreement, the Company sold to the purchasers thereof $30.0 million aggregate principal amount of senior secured notes (the "Notes"), or the method by which the rate or rates shall be determined, at which such debt securities will bear interest if any;

·the date or dates, or the method for determining such date or dates, from which any interest will accrue, the datesat a rate of 13.0% per annum, computed on which any such interest will be payable, the regular record dates for such interest payment dates, or the method by which any such date shall be determined, the person to whom such interest shall be payable, and the basis upon which interest shall be calculated if other than that of a 360-day year composed of twelve 30-day months;months, and payable quarterly on March 31, June 30, September 30 and December 31 of each year until maturity.

        In connection with the sale of Notes, we sold to Goldman Sachs & Co. LLC (the "Holder") the Warrant pursuant to which the Holder may purchase shares of our common stock in an aggregate amount of up to 4,046,337 shares (the "Warrant Shares"). The Warrant was sold to the Holder at a purchase price of $150,000, in a private placement exempt from registration under the Securities Act. The Warrant is exercisable in full at an exercise price of $0.8859 per share at any time on or after August 4, 2019 and on or before February 4, 2024. Pursuant to its terms, the Warrant may be exercised on a cashless basis, by cancellation of indebtedness or for cash.

·        When we refer to the right,"selling stockholder" in this prospectus, we mean the stockholder listed in the table below and its pledgees, donees, transferees or other successors in interest.

        Pursuant to the Warrant, we agreed to prepare and file a Registration Statement on Form S-3 by July 31, 2019 to provide for the resale of the issued shares of the selling stockholder. This prospectus is a part of the Registration Statement filed pursuant to that obligation.

        The table below lists the name of the selling stockholder and other information regarding the beneficial ownership of the shares of common stock held by the selling stockholder, including the nature of any position, office or other material relationship, if any, that the selling stockholder (or the individuals or entities who have control over such selling stockholder) has had within the past three years with us or with any of our predecessors or affiliates. The first column lists the number of shares of common stock beneficially owned by the selling stockholder, based on its ownership as of July 25, 2019, as such beneficial ownership is determined in accordance with the rules of the SEC. The second column lists the shares of common stock being offered by this prospectus by the selling stockholder. The third and fourth columns assume the sale of all of the shares offered by the selling stockholder pursuant to extendthis prospectus on a cash exercise basis.

        Beneficial ownership is determined in accordance with rules promulgated by the interest payment periodsSEC, and the durationinformation is not necessarily indicative of beneficial ownership for any other purpose. This table is based upon information supplied to us by the selling stockholders and information filed with the SEC.

        Information about the selling stockholder may change over time. Any changed information will be set forth in supplements to this prospectus to the extent required.

Name and Address of Selling Stockholder
 Number of Shares
Beneficially
Owned Prior to
the Offering
 Number of
Shares
Registered
for Sale
 Number of Shares
Beneficially
Owned After the
Offering(1)(2)
 Percent of Class
Beneficially
Owned After
the Offering(1)
 

Goldman Sachs & Co. LLC(3)

  4,048,772(2) 4,046,337  2,435  * 

(1)
We do not know when or in what amounts the selling stockholder will offer shares for sale, if at all. The selling stockholder may sell any or all of the extensions;

·shares included in and offered by this prospectus. Because the placeselling stockholders may offer all or places wheresome of the principalshares pursuant to this offering, we cannot estimate the number of (and premium, if any) and interest, if any, on such debt securitiesshares that will be payable, where such debt securities may be surrenderedheld by the selling stockholder after


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    completion of the offering. However, for conversion or registrationpurposes of transfer or exchange and notices or demands to or upon us in respect of such debt securities and where the applicable indenture may be served;

    ·the period or periods within which, the price or prices at which and the terms and conditions upon which such debt securities may be redeemed, as a whole or in part, at our option, ifthis table, we have assumed that after completion of the offering, none of the shares included in and covered by this prospectus will be held by the selling stockholder.

(2)
The selling stockholder will not be able to exercise any portion of the Warrant to the extent that it would beneficially own in excess of 4.9% of the Common Stock outstanding immediately after giving effect to such exercise. This percentage may, however, be raised or lowered to an option;

·our obligation, if any,amount not to redeem, repay or purchase such debt securities pursuant to any sinking fund or analogous provision orexceed 19.99% of the Common Stock outstanding on the date the Warrant was originally issued, at the option of the selling stockholder upon at least 61 days' prior notice to the Company.

(3)
Goldman, Sachs & Co. LLC ("Goldman Sachs"), a holder thereof,New York limited liability company, is a member of the New York Stock Exchange and other national exchanges. Goldman Sachs is a direct and indirect wholly-owned subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). GS Group is a public entity and its common stock is publicly traded on the periodNYSE. The Common Stock and Warrant held by Goldman Sachs were acquired in the ordinary course of its investment business and not for the purpose of resale or periods withindistribution. Goldman Sachs has not participated in the distribution of the Common Stock or Warrant on behalf of the issuer. GS Group may be deemed to beneficially own the securities held by Goldman Sachs. GS Group disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. The mailing address for Goldman Sachs is 200 West Street, 26th Floor, New York, NY 10282.

*
Less than 1%

Relationship with the Selling Stockholder

Note Purchase Agreement

        The selling stockholder or its affiliates is a party to the Note Purchase Agreement. For more information, see description in section titled "Selling Stockholder" above.


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PLAN OF DISTRIBUTION

        We are registering the shares of common stock issuable upon exercise of the Warrant issued to the selling stockholder to permit the resale of these shares of common stock by the Holder of the Warrant from time to time after the date of this prospectus. We will not receive any of the proceeds from the sale by the selling stockholder of the shares of common stock. We will bear all fees and expenses incident to our obligation to register the shares of common stock.

        The selling stockholder may sell all or a portion of the shares of common stock beneficially owned by it and offered hereby from time to time directly or through one or more underwriters, broker-dealers or agents. If the shares of common stock are sold through underwriters or broker-dealers, the selling stockholder will be responsible for underwriting discounts or selling commissions. The shares of common stock may be sold on any national securities exchange or quotation service on which the price or prices at which and the terms and conditions upon which such debt securities will be redeemed, repaid or purchased, as a whole or in part, pursuant to such obligation;

·the currency or currencies in which such debt securities are denominated and payable, which may be a foreign currency or units of two or more foreign currencies or a composite currency or currencies, and the terms and conditions relating thereto;

·whether the amount of payments of principal of (and premium, if any) or interest, if any, on such debt securities may be listed or quoted at the time of sale, in the over-the-counter market or in transactions otherwise than on these exchanges or systems or in the over-the-counter market and in one or more transactions at fixed prices, at prevailing market prices at the time of the sale, at varying prices determined at the time of sale, or at negotiated prices. These sales may be effected in transactions, which may involve crosses or block transactions. The selling stockholder may use any one or more of the following methods when selling shares:

    an underwritten offering;

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

    block trades in which the broker-dealer will attempt to sell the shares as agent but may position and resell a portion of the block as principal to facilitate the transaction;

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

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

    privately negotiated transactions;

    settlement of short sales entered into after the effective date of the registration statement of which this prospectus is a part;

    broker-dealers may agree with the selling stockholder to an index, formulasell a specified number of such shares at a stipulated price per share;

    through the writing or settlement of options or other hedging transactions, whether such options are listed on an options exchange or otherwise;

    a combination of any such methods of sale; and

    any other method (which index, formulapermitted pursuant to applicable law.

        The selling stockholder also may resell all or method may, but need not be, based on a currency, currencies, currency unitportion of the shares in open market transactions in reliance upon Rule 144 under the Securities Act, as permitted by that rule, or units or composite currencies)Section 4(a)(1) under the Securities Act, if available, rather than under this prospectus, provided that they meet the criteria and the manner in which such amounts shall be determined;

·any additions to, modifications of or deletions from the terms of such debt securities with respectconform to the eventsrequirements of defaultthose provisions.

        Broker-dealers engaged by the selling stockholder may arrange for other broker-dealers to participate in sales. If the selling stockholder effect such transactions by selling shares of common stock to or covenants set forth in the indenture;

·any provisions for collateral security for repayment ofthrough underwriters, broker-dealers or agents, such debt securities;

·whether such debt securities will be issued in certificated and/underwriters, broker-dealers or book-entry form;

·whether such debt securities will be in registered or bearer form and, if in registered form, the denominations thereof and any integral multiple thereof and, if in bearer form, the denominations thereof and terms and conditions relating thereto;

·whether issuedagents may receive commissions in the form of discounts, concessions or commissions from the selling stockholder or commissions from purchasers of the shares of common stock for whom they may act as agent or to whom they may sell as principal. Such commissions will be in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction will not be in excess


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of a customary brokerage commission in compliance with the Financial Industry Regulatory Authority ("FINRA") Rule 2121; and in the case of a principal transaction a markup or markdown in compliance with FINRA Rule 2121.01.

        In connection with sales of the shares of common stock or otherwise, the selling stockholder may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the shares of common stock in the course of hedging in positions they assume. The selling stockholder may also sell shares of common stock short and if such short sale shall take place after the date that this Registration Statement is declared effective by the Commission, the selling stockholder may deliver shares of common stock covered by this prospectus to close out short positions and to return borrowed shares in connection with such short sales. The selling stockholder may also loan or pledge shares of common stock to broker-dealers that in turn may sell such shares, to the extent permitted by applicable law. The selling stockholder may also enter into option or other transactions with broker-dealers or other financial institutions or the creation of one or more globalderivative securities and whetherwhich require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). Notwithstanding the foregoing, the selling stockholder has been advised that they may not use shares registered on this registration statement to cover short sales of our common stock made prior to the date the registration statement, of which this prospectus forms a part, has been declared effective by the SEC.

        The selling stockholder may, from time to time, pledge or grant a security interest in some or all or aportion of the principal amountWarrant owned by it and, if they default in the performance of their secured obligations, the pledgees or secured parties may offer and sell the shares of common stock from time to time pursuant to this prospectus or any amendment to this prospectus under Rule 424(b)(3) or other applicable provision of the debtSecurities Act of 1933, as amended, amending, if necessary, the list of selling stockholders to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus. The selling stockholder also may transfer and donate the shares of common stock in other circumstances in which case the transferees, donees, pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.

        The selling stockholder and any broker-dealers or agents that are involved in selling the shares may be deemed to be "underwriters" within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers or agents and any profit on the resale of the shares purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act. The selling stockholder has informed the Company that it does not have any written or oral agreement or understanding, directly or indirectly, with any underwriter or other person to distribute the common stock. In no event shall any broker-dealer receive fees, commissions and markups which, in the aggregate, would exceed customary fees and commissions. Upon the Company being notified in writing by the selling stockholder that any material arrangement has been entered into with a broker-dealer for the sale of common stock through a block trade, special offering, exchange distribution or secondary distribution or a purchase by a broker or dealer, a supplement to this prospectus will be filed, if required, pursuant to Rule 424(b) under the Securities Act, disclosing (i) the name of the selling stockholder and of the participating broker-dealer(s), (ii) the number of shares involved, (iii) the price at which such the shares of common stock were sold, (iv) the commissions paid or discounts or concessions allowed to such broker-dealer(s), where applicable, (v) that such broker-dealer(s) did not conduct any investigation to verify the information set out or incorporated by reference in this prospectus, and (vi) other facts material to the transaction.

        Under the securities laws of some states, the shares of common stock may be sold in such states only through registered or licensed brokers or dealers. In addition, in some states the shares of common stock may not be sold unless such shares have been registered or qualified for sale in such state or an exemption from registration or qualification is represented thereby;available and is complied with.

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·if other thanThere can be no assurance that the entire principal amountselling stockholder will sell any or all of the debt securities when issued,shares of common stock registered pursuant to the portionshelf registration statement, of which this prospectus forms a part.

        The selling stockholder and any other person participating in such distribution will be subject to applicable provisions of the principal amount payable upon acceleration of maturity,Exchange Act and the termsrules and conditionsregulations thereunder, including, without limitation, to the extent applicable, Regulation M of the Exchange Act, which may limit the timing of purchases and sales of any acceleration;

·ifof the shares of common stock by the selling stockholder and any other participating person. To the extent applicable, covenants affording holdersRegulation M may also restrict the ability of debt protectionany person engaged in the distribution of the shares of common stock to engage in market-making activities with respect to our operations, financial condition or transactions involving us;

·the applicability, if any,shares of defeasance and covenant defeasance provisionscommon stock. All of the applicable indenture;

·foregoing may affect the terms, if any, upon which such debt securities may be convertible into our Common Stock or Preferred Stockmarketability of the shares of common stock and the terms and conditions upon which such conversionability of any person or entity to engage in market-making activities with respect to the shares of common stock.

        We will be effected,pay all expenses of the registration of the shares of common stock pursuant to the Note Purchase Agreement, including, without limitation, SEC filing fees and expenses of compliance with state securities or "blue sky" laws;provided,however, that the initial conversion price or rate and the conversion period;

·if convertible, any applicable limitations on the ownership or transferability of the Common Stock or Preferred Stock into which such debt securities are convertible;

·whether and under what circumstances weselling stockholder will pay additional amounts as contemplated in the indenture on such debt securities in respect of any tax, assessment or governmental chargeall underwriting discounts and if so, whether we will have the option to redeem such debt securities in lieu of making such payment; and

·any other material terms of such debt securities.

The debt securities may provide for less than the entire principal amount thereof to be payable upon declaration of acceleration of the maturity thereof. Special federal income tax, accounting and other considerations applicable to these original issue discount securities will be described in the applicable prospectus supplement. The applicable prospectus supplement will set forth material U.S. federal income tax considerations for holders of any debt securities and the securities exchange or quotation system on which any debt securities are listed or quoted, if any.

The applicable indenture may contain provisions that would limit our ability to incur indebtedness or that would afford holders of debt securities protection in the event of a highly leveraged or similar transaction involving us or in the event of a change of control.

Senior Debt Securities

Payment of the principal of premium,selling commissions, if any and interest on senior debt securitiesany related legal expenses incurred by it. We will rank on parityindemnify the selling stockholder against certain liabilities, including some liabilities under the Securities Act, in accordance with all of our other senior unsecured and unsubordinated debt.

Subordinated Debt Securities

Payment of the principal of, premium, if any, and interest on subordinated debt securitiesNote Purchase Agreement, or the selling stockholders will be subordinated and juniorentitled to contribution. We may be indemnified by the selling stockholder against certain liabilities, including some liabilities under the Securities Act, that may arise from any written information furnished to us by the selling stockholder specifically for use in right of payment tothis prospectus, in accordance with the prior payment in full of all of our senior debt. We will set forth in the applicable prospectus supplement relating to any subordinated debt securities the subordination terms of such securities as well as the aggregate amount of outstanding indebtedness, as of the most recent practicable date, that by its terms would be senior to the subordinated debt securities.  We will also set forth in such prospectus supplement limitations, if any, on issuance of additional senior debt.

Merger, Consolidationrelated Note Purchase Agreement, or Sale

The applicable indenture will provide that we may consolidate with, or sell, lease or convey all or substantially all of our assetsbe entitled to or merge with or into, any other corporation, provided that:contribution.


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·
either we shall be the continuing corporation, or the successor corporation (if other than the Company) formed by or resulting from any such consolidation or merger or which shall have received the transfer of such assets shall expressly assume payment of the principal of (and premium, if any), and interest on, all of the applicable debt securities and the due and punctual performance and observance of all of the covenants and conditions contained in the applicable indenture;LEGAL MATTERS

        

·immediately after giving effect to such transaction and treating any indebtedness which becomes our obligation or an obligation of one of our subsidiaries as a result thereof as having been incurred by us or such subsidiary at the time of such transaction, no event of default under the applicable indenture, and no event which, after notice or the lapse of time, or both, would become such an event of default, shall have occurred and be continuing; and

·an officer’s certificate andCertain legal opinion covering such conditions shall be delivered to the applicable trustee.

Covenants

The applicable indenture will contain covenants requiring us to take certain actions and prohibiting us from taking certain actions. The covenants with respect to any series of debt securities will be described in the prospectus supplement relating thereto.

Events of Default, Notice and Waiver

Each indenture will describe specific “events of default” with respect to any series of debt securities issued thereunder. Such “events of default” are likely to, but may not, include (with grace and cure periods):

·default in the payment of any installment of interest on any debt security of such series;

·default in the payment of principal of (or premium, if any, on) any debt security of such series at its maturity or upon any redemption, by declaration or otherwise;

·default in making any required sinking fund payment for any debt security of such series;

·default in the performance or breach of any other covenant or warranty of the Company contained in the applicable indenture (other than a covenant added to the indenture solely for the benefit of a series of debt securities issued thereunder other than such series), continued for a specified period of days after written notice as provided in the applicable indenture;

·default in the payment of specified amounts of indebtedness (subject in some instances to a minimum threshold amount) of the Company or any mortgage, indenture or other instrument under which such indebtedness is issued or by which such indebtedness is secured, such default having occurred after the expiration of any applicable grace period and having resulted in the acceleration of the maturity of such indebtedness, but only if such indebtedness is not discharged or such acceleration is not rescinded or annulled;

·certain events of bankruptcy, insolvency or reorganization, or court appointment of a receiver, liquidator or trustee of the Company or any of our significant subsidiaries or their property; and

·any other event of default provided in the applicable resolution of our board of directors or the supplemental indenture under which we issue series of debt securities.

An event of default for a particular series of debt securities does not necessarily, but may, constitute an event of default for any other series of debt securities issued under the indenture. Unless otherwise indicated in the applicable prospectus supplement, if an event of default under any indenture with respect to debt securities of any

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series at the time outstanding occurs and is continuing, then the applicable trustee or the holders of not less than a majority of the principal amount of the outstanding debt securities of that series may declare the principal amount (or, if the debt securities of that series are original issue discount securities or indexed securities, such portion of the principal amounts may be specified in the terms thereof) of all the debt securities of that series to be due and payable immediately by written notice thereof to us (and to the applicable trustee if given by the holders). However, at any time after such a declaration of acceleration with respect to debt securities of such series (or of all debt securities then outstanding under any indenture, as the case may be) has been made, but before a judgment or decree for payment of the money due has been obtained by the applicable trustee, the holders of not less than a majority in principal amount of outstanding debt securities of such series (or of all debt securities then outstanding under the applicable indenture, as the case may be) may rescind and annul such declaration and its consequences if:

·we shall have deposited with the applicable trustee all required payments of the principal of (and premium, if any) and interest on the debt securities of such series (or of all debt securities then outstanding under the applicable indenture, as the case may be), plus certain fees, expenses, disbursements and advances of the applicable trustee; and

·all events of default, other than the non-payment of accelerated principal (or specified portion thereof), with respect to debt securities of such series (or of all debt securities then outstanding under the applicable indenture, as the case may be) have been cured or waived as provided in such indenture.

If an event of default relating to events of bankruptcy, insolvency or reorganization of the Company occurs and is continuing, then the principal amount of all of the debt securities outstanding, and any accrued interest, will, subject to applicable law, automatically become due and payable immediately, without any declaration or other act by the trustee or any holder.

Each indenture may also provide that the holders of not less than a majority in principal amount of the outstanding debt securities of any series (or of all debt securities then outstanding under the applicable indenture, as the case may be) may waive any past default with respect to such series and its consequences, except, unless otherwise noted, a default:

·in the payment of the principal of (or premium, if any) or interest on any debt security of such series; or

·in respect of a covenant or provision contained in the applicable indenture that cannot be modified or amended without the consent of the holder of each outstanding debt security affected thereby.

Each trustee may be required to give notice to the holders of debt securities within a certain number of days of a default under the applicable indenture unless such default shall have been cured or waived; provided, however, that such trustee may withhold notice to the holders of any series of debt securities of any default with respect to such series (except a default in the payment of the principal of (or premium, if any) or interest on any debt security of such series or in the payment of any sinking fund installment in respect of any debt security of such series) if specified responsible officers of such trustee consider such withholding to be in the interest of such holders.

Each indenture may provide that no holders of debt securities of any series may institute any proceedings, judicial or otherwise, with respect to such indenture or for any remedy thereunder, except in the case of failure of the applicable trustee, for a certain period, to act after it has received a written request to institute proceedings in respect of an event of default from the holders of not less than 25% in principal amount of the outstanding debt securities of such series, as well as an offer of indemnity reasonably satisfactory to it. This provision will not prevent, however, any holder of debt securities from instituting suit for the enforcement of payment of the principal of (and premium, if any) and interest on such debt securities at the respective due dates thereof.

Each indenture may provide that in case an event of default shall occur and be known to any trustee and not be cured, the trustee must use the same degree of care as a prudent person would use in the conduct of his or her own affairs in the exercise of the trustee’s power. Subject to provisions in each indenture relating to its duties in case

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of default, no trustee will be under any obligation to exercise any of its rights or powers under an indenture at the request or direction of any holders of any series of debt securities then outstanding under such indenture, unless such holders shall have offered to the trustee thereunder reasonable security or indemnity. The holders of not less than a majority in principal amount of the outstanding debt securities of any series (or of all debt securities then outstanding under an indenture, as the case may be) may have the right to direct the time, method and place of conducting any proceeding for any remedy available to the applicable trustee, or of exercising any trust or power conferred upon such trustee. However, a trustee may refuse to follow any direction which is in conflict with any law or the applicable indenture, which may involve such trustee in personal liability or which may be unduly prejudicial to the holders of debt securities of such series not joining therein.

Within a certain period after the close of each fiscal year and at various other times, we will be required to deliver to each trustee a certificate, signed by one of several specified officers, stating whether or not such officer has knowledge of any default under the applicable indenture and, if so, specifying each such default and the nature and status thereof.

Modification of the Indenture

Each indenture may provide that we and the trustee may enter into supplemental indentures without the consent of the holders of debt securities to:

·secure any debt securities;

·evidence the assumption by a successor corporation of our obligations;

·add covenants for the protection of the holders of debt securities;

·cure any ambiguity or correct any inconsistency in the indenture;

·establish the forms or terms of debt securities of any series; and

·evidence and provide for the acceptance of appointment by a successor trustee.

It is anticipated that modifications and amendments of an indenture may be made by us and the trustee, with the consent of the holders of, unless otherwise noted in such indenture, not less than a majority in principal amount of each series of the outstanding debt securities issued under the indenture that are affected by the modification or amendment, provided that no such modification or amendment may, without the consent of each holder of such debt securities affected thereby:

·change the stated maturity date of the principal of (or premium, if any) or any installment of interest, if any, on any such debt security;

·reduce the principal amount of (or premium, if any) or the interest, if any, on any such debt security or the principal amount due upon acceleration of an original issue discount security;

·change the time or place or currency of payment of principal of (or premium, if any) or interest, if any, on any such debt security;

·impair the right to institute suit for the enforcement of any such payment on or with respect to any such debt security;

·reduce any amount payable on redemption;

·modify any of the subordination provisions or the definition of senior indebtedness applicable to any subordinated debt securities in a manner adverse to the holders of those securities;

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·reduce the above-stated percentage of holders of debt securities necessary to modify or amend the indenture; or

·modify the foregoing requirements or reduce the percentage of outstanding debt securities necessary to waive compliance with certain provisions of the indenture or for waiver of certain defaults.

A record date may be set for any act of the holders with respect to consenting to any amendment. Unless otherwise set forth in any applicable indenture, the holders of not less than a majority in principal amount of outstanding debt securities of each series affected thereby will have the right to waive our compliance with certain covenants in such indenture. Each indenture will contain provisions for convening meetings of the holders of debt securities of a series to take permitted action.

A prospectus supplement may set forth modifications or additions to these provisions with respect to a particular series of debt securities.

Conversion or Exchange Rights

A prospectus supplement will describe the terms, if any, on which a series of debt securities may be convertible into or exchangeable for our Common Stock, Preferred Stock or other securities. These terms will also include provisions as to whether conversion or exchange is mandatory, at the option of the holder or at our option. Such provisions will also include the conversion or exchange price (or manner or calculation thereof), the conversion or exchange period, the events requiring an adjustment of the conversion or exchange price, and provisions affecting conversion or exchange in the event of the redemption of such series of debt securities.

Registered Global Securities

We may issue the debt securities of a series in whole or in part in the form of one or more fully registered global securities that we will deposit with a depositary or with a nominee for a depositary identified in the applicable prospectus supplement and registered in the name of such depositary or nominee.  In such case, we will issue one or more registered global securities denominated in an amount equal to the aggregate principal amount of all of the debt securities of the series to be issued and represented by such registered global security or securities.

Unless and until it is exchanged in whole or in part for debt securities in definitive registered form, a registered global security may not be transferred except as a whole:

·             by the depositary for such registered global security to its nominee;

·             by a nominee of the depositary to the depositary or another nominee of the depositary; or

·             by the depositary or its nominee to a successor of the depositary or a nominee of the successor.

The prospectus supplement relating to a series of debt securities will describe the specific terms of the depositary arrangement with respect to any portion of such series represented by a registered global security. We anticipate that the following provisions will apply to all depositary arrangements for debt securities:

·ownership of beneficial interests in a registered global security will be limited to persons that have accounts with the depositary for the registered global security, those persons being referred to as “participants,” or persons that may hold interests through participants;

·upon the issuance of a registered global security, the depositary for the registered global security will credit, on its book-entry registration and transfer system, the participants’ accounts with the respective principal amounts of the debt securities represented by the registered global security beneficially owned by the participants;

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·any dealers, underwriters, or agents participating in the distribution of the debt securities will designate the accounts to be credited; and

·ownership of any beneficial interest in the registered global security will be shown on, and the transfer of any ownership interest will be effected only through, records maintained by the depositary for the registered global security (with respect to interests of participants) and on the records of participants (with respect to interests of persons holding through participants).

The laws of some states may require that certain purchasers of securities take physical delivery of the securities in definitive form. These laws may limit the ability of those persons to own, transfer or pledge beneficial interests in registered global securities.

So long as the depositary for a registered global security, or its nominee, is the registered owner of the registered global security, the depositary or the nominee, as the case may be, will be considered the sole owner or holder of the debt securities represented by the registered global security for all purposes under the indenture. Except as set forth below, owners of beneficial interests in a registered global security:

·will not be entitled to have the debt securities represented by a registered global security registered in their names;

·will not receive or be entitled to receive physical delivery of the debt securities in the definitive form; and

·will not be considered the owners or holders of the debt securities under the indenture.

Accordingly, each person owning a beneficial interest in a registered global security must rely on the procedures of the depositary for the registered global security and, if the person is not a participant, on the procedures of a participant through which the person owns its interest, to exercise any rights of a holder under the indenture.

We understand that under existing industry practices, if we request any action of holders or if an owner of a beneficial interest in a registered global security desires to give or take any action that a holder is entitled to give or take under the indenture, the depositary for the registered global security would authorize the participants holding the relevant beneficial interests to give or take the action, and those participants would authorize beneficial owners owning through those participants to give or take the action or would otherwise act upon the instructions of beneficial owners holding through them.

We will make payments of principal and premium, if any, and interest, if any, on debt securities represented by a registered global security registered in the name of a depositary or its nominee to the depositary or its nominee, as the case may be, as the registered owners of the registered global security. None of the Company, the trustee or any other agent of the Company or the trustee will be responsible or liable for any aspect of the records relating to, or payments made on account of, beneficial ownership interests in the registered global security or for maintaining, supervising or reviewing any records relating to the beneficial ownership interests.

We expect that the depositary for any debt securities represented by a registered global security, upon receipt of any payments of principal and premium, if any, and interest, if any, in respect of the registered global security, will immediately credit participants’ accounts with payments in amounts proportionate to their respective beneficial interests in the registered global security as shown on the records of the depositary. We also expect that standing customer instructions and customary practices will govern payments by participants to owners of beneficial interests in the registered global security held through the participants, as is now the case with the securities held for the accounts of customers in bearer form or registered in “street name.” We also expect that any of these payments will be the responsibility of the participants.

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If the depositary for any debt securities represented by a registered global security is at any time unwilling or unable to continue as depositary or ceases to be a clearing agency registered under the Exchange Act, we will appoint an eligible successor depositary. If we fail to appoint an eligible successor depositary within 90 days, we will issue the debt securities in definitive form in exchange for the registered global security. In addition, we may at any time and in our sole discretion decide not to have any of the debt securities of a series represented by one or more registered global securities. In such event, we will issue debt securities of that series in a definitive form in exchange for all of the registered global securities representing the debt securities. The trustee will register any debt securities issued in definitive form in exchange for a registered global security in such name or names as the depositary, based upon instructions from its participants, shall instruct the trustee.

We may also issue bearer debt securities of a series in the form of one or more global securities, referred to as “bearer global securities.”  We will deposit these bearer global securities with a common depositary for Euroclear System and Clearstream Bank Luxembourg, Societe Anonyme, or with a nominee for the depositary identified in the prospectus supplement relating to that series. The prospectus supplement relating to a series of debt securities represented by a bearer global security will describe the specific terms and procedures, including the specific terms of the depositary arrangement and any specific procedures for the issuance of debt securities in definitive form in exchange for a bearer global security, with respect to the position of the series represented by a bearer global security.

Discharge, Defeasance and Covenant Defeasance

We will be able to discharge or defease our obligations pursuant to the terms of the indenture, which we anticipate will include those requirements set forth below. Unless otherwise set forth in the applicable prospectus supplement, the subordination provisions applicable to any subordinated debt securities will be expressly subject to the discharge and defeasance provisions of the indenture.

We may discharge some of our obligations to holders of any series of debt securities that have not already been delivered to the trustee for cancellation and that have either become due and payable or are by their terms to become due and payable within one year (or are scheduled for redemption within one year).  We may effect a discharge by irrevocably depositing with the trustee cash or U.S. government obligations, as trust funds, in an amount certified to be sufficient to pay when due, whether at maturity, upon redemption or otherwise, the principal of, premium, if any, and interest on the debt securities and any mandatory sinking fund payments.

Unless otherwise provided in the applicable prospectus supplement, we may also discharge any and all of our obligations to holders of any series of debt securities at any time (“defeasance”). We also may be released from the obligations imposed by any covenants of any outstanding series of debt securities and provisions of the indenture, and we may omit to comply with those covenants without creating an event of default (“covenant defeasance”). We may effect defeasance and covenant defeasance only if, among other things:

·we irrevocably deposit with the trustee cash or U.S. government obligations, as  trust funds, in an amount certified to be sufficient to pay at maturity (or upon redemption) the principal, premium, if any, and interest on all outstanding debt securities of the series; and

·we deliver to the trustee an opinion of counsel from a nationally recognized law firm to the effect that the holders of the series of debt securities will not recognize income, gain or loss for U.S. federal income tax purposes as a result of the defeasance or covenant defeasance and that defeasance or covenant defeasance will not otherwise alter the holders’ U.S. federal income tax treatment of principal, premium, if any, and interest payments on the series of debt securities, which opinion, in the case of legal defeasance, must be based on a ruling of the Internal Revenue Service issued, or a change in U.S. federal income tax law.

Although we may discharge or defease our obligations under the indenture as described in the two preceding paragraphs, we may not avoid, among other things, our duty to register the transfer or exchange of any series of debt securities, to replace any temporary, mutilated, destroyed, lost or stolen series of debt securities or to maintain an office or agency in respect of any series of debt securities.

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Redemption of Securities

Debt securities may also be subject to optional or mandatory redemption on terms and conditions described in the applicable prospectus supplement.

From and after notice has been given as provided in the applicable indenture, if funds for the redemption of any debt securities called for redemption shall have been made available on such redemption date, such debt securities will cease to bear interest on the date fixed for such redemption specified in such notice, and the only right of the holders of the debt securities will be to receive payment of the redemption price.

Notices

Holders of our debt securities will receive notices pursuant to the terms of the indenture at their addresses as they appear in the security register.

Title

We may treat the person in whose name a debt security is registered on the applicable record date as the owner of the debt security for all purposes, whether or not it is overdue.

Governing Law

We anticipate that New York law will govern the indentures and the debt securities, without regard to its conflicts of law principles.

Concerning the Trustee

Each indenture provides that there may be more than one trustee under the indenture, each with respect to one or more series of debt securities. If there are different trustees for different series of debt securities, each trustee will be a trustee of a trust under the indenture separate and apart from the trust administered by any other trustee under the indenture.  Except as otherwise indicated in this prospectus or any prospectus supplement, any action permitted to be taken by a trustee may be taken by such trustee only with respect to the one or more series of debt securities for which it is the trustee under the indenture.  Any trustee under the indenture may resign or be removed with respect to one or more series of debt securities.  All payments of principal of, premium, if any, and interest on, and all registration, transfer, exchange, authentication and delivery (including authentication and delivery on original issuance of the debt securities) of, the debt securities of a series will be effected by the trustee with respect to that series at an office designated by the trustee pursuant to the terms of the indenture.

Each indenture contains limitations on the right of the trustee, should it become a creditor of the Company, to obtain payment of claims in some cases or to realize on certain property received in respect of any such claim as security or otherwise.  The trustee may engage in other transactions.  If it acquires any conflicting interest relating to any duties with respect to the debt securities, however, it must eliminate the conflict or resign as trustee.

PLAN OF DISTRIBUTION

We may sell the securities to one or more underwriters for public offering and sale by them, through agents or dealers, directly to purchasers or through a combination of any of these methods of sale. Any underwriter, agent or dealer involved in the offer and sale of the securities will be named in the applicable prospectus supplement.  The distribution of securities may be effected from time to time in one or more transactions at a fixed price or prices, which may be changed, or from time to time at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices.

We may, from time to time, authorize underwriters acting as our agents to offer and sell the securities upon the terms and conditions set forth in any prospectus supplement. In connection with the sale of the securities, underwriters may be deemed to have received compensation from us in the form of underwriting discounts or commissions and may also receive commissions from purchasers of the securities for whom they may act as agent.

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Any underwriting compensation paid by us to underwriters or agentsmatters in connection with thethis offering of the securities, and any discounts, concessions or commissions allowed by underwriters to participating dealers, will be set forth in an applicable prospectus supplement. If a dealer is utilized in the sale of the securities in respect of which this prospectus is delivered, we may sell the securities to the dealer, as principal. The dealer may then resell the securities to the public at varying prices to be determined by the dealer at the time of resale. Underwriters, dealers and agents participating in the distribution of the securities may be deemed to be underwriters under the Securities Act, and any discounts and commissions received by them and any profit realized by them on resale of the securities may be deemed to be underwriting discounts, concessions and commissions under the Securities Act. Underwriters, dealers and agents may be entitled under agreements with us to indemnification against and contribution toward certain civil liabilities, including liabilities under the Securities Act, and to reimbursement by us for certain expenses.

If so indicated in an applicable prospectus supplement, we may authorize dealers acting as our agents to solicit offers by institutions to purchase the 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 the date or dates stated in the prospectus supplement. Each delayed delivery contract will be for an amount not less than, and the aggregate principal amount or offering price of the securities sold pursuant to delayed delivery contracts will not be less nor more than, the respective amounts stated in the prospectus supplement. Institutions with whom delayed delivery contracts, when authorized, may be entered into include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutions, but will in all cases be subject to approval by us.  Contracts will not be subject to any conditions except (1) the purchase by an institution of the securities covered by its contracts will not at the time of delivery be prohibited under the laws of any jurisdiction in the United States to which the institution is subject, and (2) if the securities are being sold to underwriters, we will have sold to them the total principal amount of the securities less the principal amount of the securities covered by contracts. Agents and underwriters will have no responsibility in respect of the delivery or performance of contracts.

Direct sales to investors or our stockholders may be accomplished through subscription offerings or through stockholder purchase rights distributed to stockholders. In connection with subscription offerings or the distribution of stockholder purchase rights to stockholders, if all of the underlying securities are not subscribed for, we may sell any unsubscribed securities to third parties directly or through underwriters or agents. In addition, whether or not all of the underlying securities are subscribed for, we may concurrently offer additional securities to third parties directly or through underwriters or agents. If securities are to be sold through stockholder purchase rights, the stockholder purchase rights will be distributed as a dividend to the stockholders for which they will pay no separate consideration. The prospectus supplement with respect to the offer of securities under stockholder purchase rights will set forth the relevant terms of the stockholder purchase rights, including:

·whether Common Stock will be offered under the stockholder purchase rights;

·the number or amount of those securities or warrants that will be offered under the stockholder purchase rights;

·the period during which and the price at which the stockholder purchase rights will be exercisable;

·the number of stockholder purchase rights then outstanding;

·any provisions for changes to or adjustments in the exercise price of the stockholder purchase rights, and

·any other material terms of the stockholder purchase rights.

The securities also may be offered and sold, if so indicated in the prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more firms (“remarketing firms”), acting as principals for their own accounts or as agents for us. Any remarketing firm will be identified and the terms of its agreement, if any, with us will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters in connection with the securities remarketed thereby. Remarketing firms may be entitled under agreements which may be entered into with us to indemnification by us against certain liabilities, including liabilities under the Securities Act.

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We may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third parties in such sale transactions will be underwriters and will be identified in the applicable prospectus supplement (or a post-effective amendment).

Securities offered may be a new issue of securities with no established trading market. Any underwriters to whom or agents through whom these securities are sold by us for public offering and sale may make a market in these securities, but such underwriters or agents will not be obligated to do so and may discontinue any market making at any time without notice. No assurance can be given as to the liquidity of or the trading market for any such securities.

To facilitate the offering of securities, certain persons participating in the offering may engage in transactions that stabilize, maintain, or otherwise affect the price of the securities. These may include over-allotment, stabilization, syndicate short covering transactions and penalty bids. Over-allotment involves sales in excess of the offering size, which creates a short position. Stabilizing transactions involve bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum. Syndicate short covering transactions involve purchases of securities in the open market after the distribution has been completed in order to cover syndicate short positions. Penalty bids permit the underwriters to reclaim selling concessions from dealers when the securities originally sold by the dealers are purchased in covering transactions to cover syndicate short positions. These transactions, if commenced, may be discontinued by the underwriters at any time.

During such time as we may be engaged in a distribution of the securities covered by this prospectus we are required to comply with Regulation M promulgated under the Securities Exchange Act of 1934. With certain exceptions, Regulation M precludes us, any affiliated purchasers, and any broker-dealer or other person who participates in such 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 restricts bids or purchases made in order to stabilize the price of a security in connection with the distribution of that security.

Some of the underwriters and their affiliates may engage in transactions with or perform services for us in the ordinary course of business.

LEGAL MATTERS

Certain legal matters with respect to the validity of the securities being offered hereby will be passed upon for us by Waller Lansden Dortch & Davis,Goodwin Procter LLP, Nashville, Tennessee.  If the validity of any securities is also passed upon by counsel for the underwriters of an offering of those securities, that counsel will be named in the prospectus supplement relating to that offering.Boston, Massachusetts.


EXPERTS

EXPERTS

The consolidated financial statements and schedule of Capstone Turbine Corporation as of March 31, 2015 and 2014 andappearing in ourAnnual Report (Form 10-K) for each of  the years in the three-year periodyear ended March 31, 2015, and management’s assessment of the effectiveness of internal control over financial reporting as of March 31, 2015,2019 have been incorporatedaudited by reference herein and in the registration statement in reliance upon the reports of KPMGMarcum LLP, independent registered public accounting firm, as set forth in their report thereon, included therein, and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference herein, andin reliance upon such report given on the authority of saidsuch firm as experts in accounting and auditing.

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WHERE YOU CAN FIND MORE INFORMATION

        

We are a reporting company and file annual, quarterly and current reports, proxy and information statements and other information with the SEC. This prospectus is part of a registration statement that we have filed with the SEC a registration statement on Form S-3 under the Securities Act of 1933 with respectrelating to the securities to be offered hereby.under this prospectus. This prospectus does not contain all of the information set forth in the registration statement and its exhibits. Statements made bythe exhibits to the registration statement. For further information with respect to us inand the securities to be offered under this prospectus, as to the contents of any contract, agreement or other document referred to in this prospectus are not necessarily complete. For a more complete description of these contracts, agreements or other documents,we refer you should carefully read the exhibits to the registration statement and the documents that we reference under the caption “Incorporation of Certain Documents by Reference.”

We file annual, quarterlyexhibits and current reports, proxy statements and other information with the SEC. You may read and copy any materials we file with the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549.  You may obtain information on the operationschedules filed as a part of the Public Reference Room by calling the SEC at 1-800-SEC-0330.registration statement.

        The SEC maintains an Internetinternet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, atwhere you may read and copy the SEC’sregistration statement, as well as our reports, proxy and information statements and other information. The address of the SEC's web site at is http://www.sec.gov.www.sec.gov.

        Copies of certain information filed by us with the SEC are also available on our website at http://www.capstoneturbine.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.


INCORPORATION BY REFERENCE

        

We make available free of charge through our web site, which you can find at http://www.capstoneturbine.com, our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendmentsThe SEC allows us to these reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC.

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

We are incorporatingincorporate by reference the information and reports we file with the SEC,it, which means:

·             incorporated documents are considered part of this prospectus;

·means that we can disclose important information to you by referring you to those documents;these documents. The information incorporated by reference is an important part of this prospectus, and

·information that we file later with the SEC will automatically will update and supersede the information contained in this prospectus.

already incorporated by reference. We are incorporating by reference the following documents listed below, which we have previouslyalready filed with the SEC:SEC, and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including all filings made after the date of the filing of this registration statement and prior to the effectiveness of this registration statement, except as to any portion of any future report or document that is not deemed filed under such provisions, until we sell all of the securities:

(a)


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(b)           theThe description of our Common Stockcommon stock contained in our Registration Statementregistration statement onForm 8-A, filed with the SEC on June 22,21, 2000 (including any further amendment or reports filed with the SEC for the purpose of updating such description) and the description of our Series B Junior Participating Preferred Stock Purchase Rights contained in our Registration Statement onForm 8-A, filed with the SEC on May 9, 2016, including any subsequent amendment or report filed for the purpose of amending such descriptiondescription.


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            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 the description of our Preferred Stock purchase rights contained in our Registration Statementexhibits filed on Form 8-A,such form that are related to such items) that are filed by us with the SEC on July 8, 2005, including any subsequent amendment or report filed for the purpose of amending such description; and

    (c)           any future filings with the SEC under Sectionpursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act until all offerings(i) after the date of any securities registered hereby are completed; provided thatthe initial filing of the registration statement of which this prospectus will not incorporate any informationis a part and prior to effectiveness of the registration statement, or (ii) after the date of this prospectus until we may furnishsell all of the shares covered by this prospectus or the sale of shares by us pursuant to the SEC under Item 2.02 or Item 7.01 of Form 8-K.this prospectus is terminated.

            

    AnyA statement contained in this prospectus or any prospectus supplement or in a document incorporated or deemed to be incorporated by reference into this prospectus willshall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in this prospectus, any prospectus supplement or in any other subsequently filed document thatwhich is deemed to bealso incorporated by reference intoin this prospectus modifies or supersedes thereplaces such statement. Any statementstatements so modified or superseded willshall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

    You can obtain copies ofshould not assume that the information in this prospectus or in the documents incorporated by reference inis accurate as of any date other than the date on the front of this prospectus but not delivered with this prospectus without charge through our web site (http://www.capstoneturbine.com) as soon as reasonably practicable after we electronically file the material with, or furnish it to, the SEC,those documents.

            You may request a copy of these documents, orally or by requesting them in writing, orwhich will be provided to you at no cost by telephone at the following address:contacting:

    Darren R. Jamison
    President and Chief Executive Officer
    Capstone Turbine Corporation

    21211 Nordhoff
    16640 Stagg Street

    Chatsworth,
    Van Nuys, California 91311

    Attention: Chief Financial Officer

    91406
    (818) 734-5300

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    PART II

    LOGO

    4,046,337 Shares of Common Stock

    PROSPECTUS

    July    , 2019


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    Part II—INFORMATION NOT REQUIRED IN PROSPECTUS

    Item 14.    Other Expenses of Issuance and Distribution.Distribution

            

    The following table sets forth the various expenses to be incurred in connection with the offerings described in this Registration Statement:

    Securities and Exchange Commission registration fee

     

    $

    6,379

     

    Printing and shipping expenses

     

    *

     

    Legal fees and expenses

     

    *

     

    Accounting fees and expenses

     

    *

     

    Transfer agent or trustee fees

     

    *

     

    Nasdaq listing fees

     

    *

     

    Miscellaneous expenses

     

    *

     

    TOTAL

     

    $

    *

     

    issuance and distribution of the securities being registered, all of which will be borne by the Company. Each item listed is estimated, except for the SEC registration fee.

    SEC registration fee

     $362.91 

    Legal fees and expenses

     $ *

    Accounting fees and expenses

                *

    Printing fees and Miscellaneous Fees

                *

    Total

     $362.91 

    *
    Estimated expenses are not presently known.  An estimate of the aggregate expenses in connection with the offerings described herein will be included in the applicable prospectus supplement.

    known

    Item 15.    Indemnification of Directors and Officers.Officers

            

    Section 102(b)(7) of the General Corporation Law of the State of Delaware (“DGCL”)DGCL provides that a corporation may eliminate or limit the personal liability of directors to a corporation or its stockholders for monetary damages for a breach of fiduciary duty as a director, except where the director breached his or her duty of loyalty, failed to act in good faith, engaged in intentional misconduct or knowingly violated a law, authorized the payment of a dividend or approved a stock repurchase or redemption in violation of Delaware corporate law or obtained an improper personal benefit. Under Section 145 of the DGCL, a corporation may 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, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that he or she is or was a director, officer, employee or agent of the corporation, or is or 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 expenses (including attorneys’attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding (i) if such person acted in good faith and in a manner that person reasonably believed to be in or not opposed to the best interests of the corporation and (ii) with respect to any criminal action or proceeding, if he or she had no reasonable cause to believe such conduct was unlawful. In actions brought by or in the right of the corporation, a corporation may indemnify such person against expenses (including attorneys’attorneys' fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit if such person acted in good faith and in a manner that person reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification may be made in respect of any claim, issue or matter as to which that person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery of the State of Delaware or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all circumstances of the case, such person is fairly and reasonably entitled to indemnification for such expenses which the Court of Chancery or other such court shall deem proper. To the extent that such person has been successful on the merits or otherwise in defending any such action, suit or proceeding referred to above or any claim, issue or matter therein, he or she is entitled to indemnification for expenses (including attorneys’attorneys' fees) actually and reasonably incurred by such person in connection therewith. The indemnification and advancement of expenses provided for or granted pursuant to Section 145 is not exclusive of any other rights of indemnification or advancement of expenses to which those seeking indemnification or advancement of expenses may be entitled, and a corporation may purchase and maintain insurance against liabilities asserted against any former or current, director, officer, employee or agent of the corporation, or a person who is or was serving at the request of the corporation as a

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    director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, whether or not the power to indemnify is provided by the statute.

            

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    We haveThe registrant has adopted provisions in ourits second amended and restated certificate of incorporation which require us,the registrant, to the fullest extent permitted by the DGCL, to indemnify and advance indemnification expenses on behalf of all directors and officers of Capstone,the registrant, and to indemnify such other persons as may be required by statute or by ourthe registrant's fourth amended and restated bylaws, against any liability and to advance indemnification expenses on behalf of all directors and officers of Capstone.bylaws. The certificate further requires usthe registrant to limit,eliminate, to the fullest extent permitted by the DGCL, the liability for monetary damages of directors of Capstonethe registrant for actions or inactions taken by them as directors. If the DGCL is later amended to authorize corporate action further limiting or eliminating the personal liability of directors, then the certificate provides that the liability of a director to Capstonethe registrant shall be limited or eliminated to the fullest extent permitted by the DGCL, as so amended from time to time.

            

    The second amended and restated certificate of incorporation also empowers us,the registrant, to the fullest extent permitted by the DGCL, to purchase and maintain insurance on behalf of any director or officer, or such other person as may be permitted by statute or ourthe registrant's fourth amended and restated bylaws, against any liability which may be asserted against any director, officer or such other person.person, and provides that the registrant may enter into contracts providing for the indemnification of any director, officer or such other person to the fullest extent permitted by the DGCL.

            

    In addition, ourthe registrant's fourth amended and restated bylaws require that weit indemnify, in the manner and to the full extent permitted by law, any person (or the estate of any person) who was or is a party to, or is threatened to be made a party to, any threatened, pending or completed action, suit or proceeding, whether or not by or in the right of Capstone,the registrant, and whether civil, criminal, administrative, investigative or otherwise, by reason of the fact that such person is a director or officer of Capstone,the registrant, and at the discretion of the board of directors, weBoard, the registrant may indemnify any person (or the estate of any person) who is such a party or threatened to be made such a party by reason of the fact that such person is or was an employee or agent of Capstonethe registrant or is or was serving at Capstone’sthe registrant's request as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise. WeThe registrant may, to the full extent permitted by law, purchase and maintain insurance on behalf of any such person against any liability which may be asserted against him and may enter into contracts providing for the indemnification of such person to the full extent permitted by law. To the full extent permitted by law, the indemnification provided under ourthe registrant's fourth amended and restated bylaws shall include expenses (including attorneys’attorneys' fees), judgments, fines and amounts paid in settlement, and, in the manner provided by law, any such expenses may be paid by usthe registrant in advance of the final disposition of such action, suit or proceeding. The indemnification provided under our fourth amended and restated bylaws shall not be deemed to limit ourthe registrant's right to indemnify any other person for any such expenses to the full extent permitted by law, nor shall it be deemed exclusive of any other rights to which any person seeking indemnification from Capstonethe registrant may be entitled under any agreement, vote of stockholders or disinterested directors or otherwise, both as to action in his or her official capacity and as to action in another capacity while holding such office.

            

    We haveThe registrant has entered into indemnity agreements (the “Indemnity Agreements”"Indemnity Agreements") with each Capstone director,of its directors, including directors who are also officers and employees of Capstone,the registrant, and certain senior officers of Capstone.the registrant. The Indemnity Agreements provide that Capstonethe registrant will pay any expenses, as defined within such Indemnity Agreements, which an indemnitee is or becomes legally obligated to pay in connection with any proceeding, including any threatened, pending or completed claim, action, suit or proceeding, whether brought by or in the right of Capstonethe registrant or otherwise and whether of a civil, criminal, administrative or investigative nature, in which the indemnitee may be or may have been involved as a party or otherwise, by reason of the fact that the indemnitee is or was, or has agreed to become, a director or officer of Capstone,the registrant, by reason of any actual or alleged error or

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    misstatement or misleading statement made or suffered by the indemnitee, by reason of any action taken by him or of any inaction on his or her part while acting as such director or officer, or by reason of the fact that he or she was serving at the request of Capstonethe registrant as a director, trustee, officer, employee or agent of Capstonethe registrant or another corporation, partnership, joint venture, trust or other enterprise, including, without limitation, all liability arising out of the negligence or active or passive wrongdoing of the indemnitee; provided, that in each such case the indemnitee acted in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of Capstone,the registrant, and, in the case of a criminal proceeding, in addition had no reasonable cause to believe that his or her conduct was unlawful.

            

    The payments to be made under the Indemnity Agreements include, but are not limited to, damages, judgments, fines, penalties, settlements and costs, attorneys’attorneys' fees and disbursements and costs of attachment or similar bonds, investigations, and any expenses of establishing a right to indemnification under the Indemnity Agreement, except Capstonethe registrant is not liable to make any payment under the Indemnity Agreements in connection with any claim made against an indemnitee (a) to the extent that payment is actually made to the indemnitee under a valid, enforceable and collectible insurance policy, (b) to the extent that the indemnitee is indemnified and actually paid otherwise than pursuant to the Indemnity Agreement, (c) for a disgorgement of profits made from the purchase and sale by the indemnitee of securities pursuant to Section 16(b) of the Exchange Act and amendments thereto or similar provisions of any state statutory law or common law, or (d) for any judgment, fine or penalty which Capstonethe registrant is prohibited by applicable law from paying as indemnity or for any other reason.

    indemnity.

    II-2 Item 16.    Exhibits



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    Item 16. EXHIBIT INDEX
    Exhibits and Financial Statement Schedules.

    Exhibit
    Number No.

    Description

    3.1

    DescriptionSecond Amended and Restated Certificate of DocumentIncorporation of Capstone Turbine Corporation(a)



    3.2

    1


    Form of Underwriting Agreement (a)

    4.1

    Specimen stock certificate (b)

    4.2

    Certificate of Designation, Preferences and Rights of Series A Junior Participating Preferred Stock (c)

    4.3


    Certificate of Amendment ofto the Second Amended and Restated Certificate of Designation, PreferencesIncorporation of Capstone Turbine Corporation, dated August 30, 2012(b)



    3.3


    Certificate of Amendment to the Second Amended and RightsRestated Certificate of Incorporation of Capstone Turbine Corporation, filed November 6, 2015(c)


    3.4


    Fourth Amended and Restated Bylaws of Capstone Turbine Corporation(d)


    3.5


    Certificate of Designations of Series AB Junior Participating Preferred Stock of Capstone Turbine Corporation dated September 16, 2008 (d)

    Corporation(e)



    3.6



    Specimen stock certificate(f)

    4.4



    4.1

    Certificate of Amendment of Certificate of Designation, Preferences and Rights of Series A Junior Participating Preferred Stock of Capstone Turbine Corporation dated August 30, 2012 (e)


    4.5

    Rights
    Note Purchase Agreement, dated as of July 7, 2005, betweenFebruary 4, 2019, by and among Capstone Turbine Corporation, certain of its subsidiaries party thereto as guarantors, Goldman Sachs Specialty Lending Holdings, Inc., as purchaser and Mellon Investor Services LLC (c)

    any other purchasers party thereto from time to time and Goldman Sachs Specialty Lending Holdings, Inc., as collateral agent(g)



    4.2



    Purchase Warrant for Common Shares issued in favor of Goldman, Sachs & Co. LLC, dated February 4, 2019(g)

    4.6



    5.1

    Amendment No. 1 to Rights Agreement, dated July 3, 2008, between Capstone Turbine Corporation and Mellon Investor Services LLC (f)



    Opinion of Goodwin Procter LLP



    23.1



    Consent of Independent Registered Public Accounting Firm

    4.7



    23.2

    Amendment No. 2 to Rights Agreement, dated June 9, 2011, between Capstone Turbine Corporation and Mellon Investor Services LLC (g)


    4.8

    Amendment No. 3 to Rights Agreement, dated July 1, 2014, between Capstone Turbine Corporation and Computershare Inc. as successor-in-interest to Mellon Investor Services LLC (h)

    4.9

    Amendment No. 4 to Rights Agreement, dated August 5, 2014, between Capstone Turbine Corporation and Computershare Inc. as successor-in-interest to Mellon Investor Services LLC (i)

    4.10

    Form of Senior Debt Securities Indenture (j)

    4.11

    Form of Subordinated Debt Securities Indenture (j)

    5

    Opinion of Waller Lansden Dortch & Davis, LLP

    12

    Computation of Ratio of Earnings to Fixed Charges

    23.1


    Consent of KPMG LLP

    23.2

    Consent of Waller Lansden Dortch & Davis,Goodwin Procter LLP (included in Exhibit 5)5.1 hereto)

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    (a)To be filed by amendment or as exhibit(s) to a Current Report on Form 8-K and incorporated herein by reference, as applicable.

    (b)

    Incorporated by reference to Capstone Turbine Corporation’sCorporation's Registration Statement on Form S-1/A, dated May 8, 2000 (File No. 333-33024).



    (b)
    Incorporated by reference to Appendix B to Capstone Turbine Corporation's Definitive Proxy Statement, filed on July 17, 2012 (File No. 001-15957).

    (c)
    Incorporated by reference to Capstone Turbine Corporation’sCorporation's Current Report on Form 8-K, filed on July 8, 2005November 6, 2015 (File No. 001-15957).



    (d)
    Incorporated by reference to Capstone Turbine Corporation’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2009 (File No. 001-15957).

    (e)Incorporated by reference to Capstone Turbine Corporation’sCorporation's Current Report on Form 8-K, filed on September 6, 20121, 2017 (File No. 001-15957).

    (f)

    (e)
    Incorporated by reference to Capstone Turbine Corporation’sCorporation's Current Report on Form 8-K, filed on July 10, 2008May 9, 2016 (File No. 001-15957).

    (g)

    (f)
    Incorporated by reference to Capstone Turbine Corporation’s Annual ReportCorporation's Registration Statement on Form 10-K filed onS-1/A, dated June 14, 201121, 2000 (File No. 001-15957)333-33024).

    (h)

    (g)
    Incorporated by reference to Capstone Turbine Corporation’sCorporation's Current Report on Form 8-K on filed on July 2, 2014February 5, 2019 (File No. 001-15957).

    (i)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K filed on August 5, 2014 (File No. 001-15957).

    (j)Incorporated by reference to Capstone Turbine Corporation’s Registration Statement on Form S-3 (File No. 333-128164).

    (k)Previously filed. Item 17.    Undertakings

            

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    Item 17.Undertakings.

    (a)The undersigned registrant hereby undertakes:

              

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

                  

        (i)To include any prospectus required by Section 10(a)(3) of the Securities Act of 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 thisthe registration statement. Notwithstanding the foregoing, any increase or decrease in 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 Securities and Exchange Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the “Calculation"Calculation of Registration Fee”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 thisthe registration statement or any material change to such information in thisthe registration statement;

        Provided,provided, however, that paragraphs (a)(1)(l)(i), (a)(1)(l)(ii) and (a)(1)(l)(iii) of this section 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 Securities and Exchange 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 the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is a part of the registration statement.

              

      (2)That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the

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      securities offered therein, and the offering of such securities at that time shall be deemed to be the initialbona 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)(l)(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. thereof;Provided,provided, however, that no statement made in a registration statement or prospectus that is part of 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 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.

              

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    (5)5)    That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any 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 thesuch 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;

               

      (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 suchthe undersigned registrant or its securities provided by or on behalf of suchthe undersigned registrant; and

              

      (iv)  Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

            

    (b)The undersigned registrant hereby undertakes that,(6)   That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’sregistrant's annual report pursuant to Section 13(a) or (d)Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan’splan's annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by

    II-5


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      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 initialbona fide offering thereof.

              

      (c)(7)   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 CommissionSEC 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.

    II-6


    (d)The undersigned registrant hereby undertakes 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 Act.

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    Table of Contents


    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 statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Chatsworth,Van Nuys, State of California, on June 16, 2015.July 26, 2019.

    CAPSTONE TURBINE CORPORATION




    By:

    By:



    /s/ DARREN R. JAMISON



    Darren R. Jamison

    President and
    Chief Executive Officer

    and President
    (Principal Executive Officer)



    By:


    /s/ JAYME L. BROOKS

    Jayme L. Brooks
    Executive Vice President & Chief Financial
    Officer (Principal Financial Officer)

            

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    TableKNOW ALL BY THESE PRESENTS, that each person whose signature appears below hereby severally constitutes and appoints each of ContentsDarren R. Jamison and Jayme L. Brooks, and each of them singly, as such person's true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for such person and in such person's name, place and stead, in any and all capacities, to sign any or all amendments (including, without limitation, post-effective amendments) to this registration statement (or any registration statement for the same offering that is to be effective upon filing pursuant to Rule 462(b) under the Securities Act of 1933), and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission, granting unto each said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as such person might or could do in person, hereby ratifying and confirming all that any said attorney-in-fact and agent, or any substitute or substitutes of any of them, may lawfully do or cause to be done by virtue hereof.

            

    Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

    Signature

    Title

    Date






    /s/ DARREN R. JAMISON



    Darren R. Jamison

    Director, President, and Chief Executive Officer and Director (Principal Executive Officer)

    July 26, 2019

    Darren R. Jamison

    June 16, 2015


    /s/ JAYME L. BROOKS



    Jayme L. Brooks



    Executive Vice President and Chief Financial Officer and (Principal Financial Officer)



    July 26, 2019

    II-7


    Table of Contents

    Signature
    Title
    Date





    /s/ FREDERICK S. HENCKEN

    Frederick S. Hencken
    Chief Accounting Officer (Principal Financial Officer and Principal Accounting Officer)

    June 16, 2015

    July 26, 2019

    Jayme L. Brooks


    /s/ GARY D. SIMON*

    HOLLY A. VAN DEURSEN

    Holly A. Van Deursen



    Chairman of the Board of Directors


    June 16, 2015


    July 26, 2019

    Gary
    /s/ PAUL D. Simon

    DEWEESE

    Paul D. DeWeese



    Director



    July 26, 2019


    /s/ ROBERT C. FLEXON

    Robert C. Flexon



    Director



    July 26, 2019


    /s/ RICHARD K. ATKINSON*

    YON Y. JORDEN

    Yon Y. Jorden



    Director


    June 16, 2015


    July 26, 2019

    Richard K. Atkinson


    /s/ ROBERT F. POWELSON

    Robert F. Powelson



    Director



    July 26, 2019

    /s/ JOHN V. JAGGERS*

    Director

    June 16, 2015

    John V. Jaggers

    /s/ NOAM LOTAN*

    Director

    June 16, 2015

    Noam Lotan


    /s/ GARY J. MAYO*

    Director

    June 16, 2015

    MAYO


    Gary J. Mayo



    Director



    July 26, 2019


    /s/ ELIOT G. PROTSCH*

    NOAM LOTAN

    Noam Lotan



    Director


    June 16, 2015

    Eliot G. Protsch

    /s/ HOLLY A. VAN DEURSEN*

    Director

    June 16, 2015

    Holly A. Van Deursen

    /s/ DARRELL J. WILK*

    Director

    June 16, 2015

    Darrell J. Wilk


    July 26, 2019

    * Pursuant to power of attorney

    By:

    /s/ DARREN R. JAMISON

    Darren R. Jamison

    Attorney-in-fact

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    Table of Contents

    Exhibit Index

    Exhibit
    Number

    Description of Document

    1

    Form of Underwriting Agreement (a)

    4.1

    Specimen stock certificate (b)

    4.2

    Certificate of Designation, Preferences and Rights of Series A Junior Participating Preferred Stock (c)

    4.3

    Certificate of Amendment of Certificate of Designation, Preferences and Rights of Series A Junior Participating Preferred Stock of Capstone Turbine Corporation dated September 16, 2008 (d)

    4.4

    Certificate of Amendment of Certificate of Designation, Preferences and Rights of Series A Junior Participating Preferred Stock of Capstone Turbine Corporation dated August 30, 2012 (e)

    4.5

    Rights Agreement, dated as of July 7, 2005, between Capstone Turbine Corporation and Mellon Investor Services LLC (c)

    4.6

    Amendment No. 1 to Rights Agreement, dated July 3, 2008, between Capstone Turbine Corporation and Mellon Investor Services LLC (f)

    4.7

    Amendment No. 2 to Rights Agreement, dated June 9, 2011, between Capstone Turbine Corporation and Mellon Investor Services LLC (g)

    4.8

    Amendment No. 3 to Rights Agreement, dated July 1, 2014, between Capstone Turbine Corporation and Computershare Inc. as successor-in-interest to Mellon Investor Services LLC (h)

    4.9

    Amendment No. 4 to Rights Agreement, dated August 5, 2014, between Capstone Turbine Corporation and Computershare Inc. as successor-in-interest to Mellon Investor Services LLC (i)

    4.10

    Form of Senior Debt Securities Indenture (j)

    4.11

    Form of Subordinated Debt Securities Indenture (j)

    5

    Opinion of Waller Lansden Dortch & Davis, LLP

    12

    Computation of Ratio of Earnings to Fixed Charges

    23.1

    Consent of KPMG LLP

    23.2

    Consent of Waller Lansden Dortch & Davis, LLP (included in Exhibit 5)

    24

    Power of Attorney (k)


    (a)To be filed by amendment or as exhibit(s) to a Current Report on Form 8-K and incorporated herein by reference, as applicable.II-8


    (b)Incorporated by reference to Capstone Turbine Corporation’s Registration Statement on Form S-1/A (File No. 333-33024).

    (c)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K, filed on July 8, 2005 (File No. 001-15957).

    (d)Incorporated by reference to Capstone Turbine Corporation’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2009 (File No. 001-15957).

    (e)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K filed on September 6, 2012 (File No. 001-15957).

    (f)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K filed on July 10, 2008 (File No. 001-15957).

    (g)Incorporated by reference to Capstone Turbine Corporation’s Annual Report on Form 10-K filed on June 14, 2011 (File No. 001-15957).

    (h)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K filed on July 2, 2014 (File No. 001-15957).

    (i)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K filed on August 5, 2014 (File No. 001-15957).

    (j)Incorporated by reference to Capstone Turbine Corporation’s Registration Statement on Form S-3 (File No. 333-128164).

    (k)Previously filed.

    II-8