As filed with the Securities and Exchange Commission on March 22, 2017

April 4, 2019
Registration No. 333-


UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON,Washington, D.C. 20549
 

FORM S-3
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

ENPHASE ENERGY, INC.
(Exact name of Registrant as specified in its charter)

   
enph.jpg
ENPHASE ENERGY, INC.
(Exact name of Registrant as specified in its charter)
Delaware�� 20-4645388
(State or other jurisdiction of
incorporation or organization)
 
(I.R.S. Employer Identification No.)
47281 Bayside Pkwy
Identification Number)Fremont, CA 94538
(707) 774-7000
(Address of principal executive offices,
including zip code)
1420 N. McDowell Blvd.
Petaluma, California 94954
(707) 774-7000
(Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices)

Paul B. NahiBadrinarayanan Kothandaraman
Chief Executive Officer
c/o Enphase Energy, Inc.
1420 N. McDowell Blvd47281 Bayside Parkway
Petaluma,Fremont, CA 9495494538
(707) 774-7000
(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

John H. Sellers
Marina Remennik


Cooley LLP
3175 Hanover Street
Palo Alto, CA 94304
(650) 843-5000


Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement.registration statement becomes effective.

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

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

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

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

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

Indicate by check mark whether the Registrantregistrant 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 accelerated filer,” “accelerated filer”filer,” “smaller reporting company,” and “smaller reporting“emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer ¨ Accelerated filer x
Non-accelerated filerSmaller reporting company
    
Non-accelerated filerEmerging Growth Company 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐
¨  (Do not check if a smaller reporting company)
 Smaller reporting company¨

CALCULATION OF REGISTRATION FEE



 
Title of Each Class of
Securities to be Registered
 
Amount
to be
Registered(1)
 
Proposed
Maximum
Offering Price
Per Share(2)
 
Proposed
Maximum
Aggregate
Offering Price(2)
 
Amount of
Registration Fee (2)
Title of Securities to be Registered
Amount to be Registered(1)
Proposed Maximum Offering Price Per Share(2)
Proposed Maximum Aggregate Offering Price(2)
Amount of Registration Fee(2)
Common Stock, par value $0.00001 per share 12,033,148 $1.355 $16,304,915.54 $1,899.74(3)(4)(4)
Preferred Stock, par value $0.00001 per share(3)(4)
Debt Securities(3)(4)
Warrants(3)(4)
Total Offering$100,000,000
$100,000,000$12,120.00

(1)Pursuant to Rule 416 under the Securities Act, of 1933, as amended, the shares of common stock being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares of common stock being registered hereunder as a result of stock splits, stock dividends or similar transactions.
(2)Estimated solely for the purpose of calculating the amount of the registration feeThe proposed maximum offering price per unit and proposed maximum aggregate offering price has been calculated pursuant to Rule 457 promulgated457(o) under the Securities Act.
(3)There are being registered hereunder such indeterminate number of shares of common stock and preferred stock, such indeterminate principal amount of debt securities and such indeterminate number of warrants to purchase common stock, preferred stock and/or debt securities to be sold by the Registrant which together shall have an aggregate initial offering price not to exceed $100,000,000. Any securities registered hereunder may be sold separately or in combination with the other securities registered hereunder. The securities registered also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for preferred stock or debt securities that provide for conversion or exchange, upon exercise of warrants or pursuant to the anti‑dilution provisions of any such securities.
(4)The proposed maximum aggregate offering price per share andclass of security will be determined from time to time by the aggregate offering price are based uponRegistrant in connection with the averageissuance by the Registrant of the highsecurities registered hereunder and low pricesis not specified as to each class of security pursuant to General Instruction II.D. of Form S-3 under the Registrant’s common stock as reported on The NASDAQ Global Market on March 20, 2017.Securities Act.


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 that 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 Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.





The information in this preliminary prospectus is not complete and may be changed. The selling stockholdersThese 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 andnor does it is not soliciting offersseek an offer to buy these securities in any statejurisdiction where suchthe offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED MARCH 22, 2017

APRIL 3, 2019

PROSPECTUS
enph.jpg
12,033,148 Shares
logoa02.jpg 

$100,000,000
Common Stock
Preferred Stock
Debt Securities
Warrants

This prospectus relates to the disposition fromFrom time to time, ofwe may offer and sell up to 12,033,148 sharesan aggregate of our$100,000,000 of any combination of the securities described in this prospectus, either individually or in combination. We may also offer common stock which are held byor preferred stock upon conversion of debt securities, common stock upon conversion of preferred stock, or common stock, preferred stock or debt securities upon the selling stockholders namedexercise of warrants.

We will provide the specific terms of these offerings and securities in one or more supplements to this prospectus. We may also authorize one or more free writing prospectuses to be provided to you in connection with these offerings. The prospectus supplement and any related free writing prospectus may also add, update or change information contained in this prospectus. We are not selling any common stock underYou should carefully read this prospectus, the applicable prospectus supplement and will not receiveany related free writing prospectus, as well as any documents incorporated by reference, before buying any of the proceeds from the sale of shares by the selling stockholders.securities being offered.
The selling stockholders identified in this prospectus, or their permitted transferees or other successors-in-interest that may be identified in a supplement to this prospectus or, if required, a post-effective amendment to the registration statement of which this prospectus is a part, may offer the shares from time to time through public or private transactions at fixed prices, at prevailing market prices, at varying prices determined at the time of sale, or at privately negotiated prices. We provide more information about how the selling stockholders may sell their shares of common stock in the section entitled “Plan of Distribution” beginning on page 5 of this prospectus. We will not be paying any underwriting discounts or commissions in connection with any offering of common stock under this prospectus.
Our common stock is listed on The NASDAQNasdaq Global Market under the trading symbol “ENPH.” On March 20, 2017,April 3, 2019, the last reported sale price of our common stock was $9.69 per share. The applicable prospectus supplement will contain information, where applicable, as to other listings, if any, on The NASDAQNasdaq Global Market was $1.34.or other securities exchange of the securities covered by the prospectus supplement.

Investing in our common stocksecurities involves a high degree of risk. You should review carefully the risks and uncertainties included hereindescribed under the heading “Risk Factors” on page 2 of thisRisk Factors” contained in the applicable prospectus supplement and in any free writing prospectuses we have authorized for use in connection with a specific offering, and under similar headings in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, which has been filed with the Securities and Exchange Commission and is incorporated by reference in this prospectus and in the other documents that are filed after the date hereof and incorporated by reference into this prospectus.

This prospectus may not be used to consummate a sale of securities unless accompanied by a prospectus supplement.

The securities may be sold directly by us to investors, through agents designated from time to time or to or through underwriters or dealers, on a continuous or delayed basis. The supplements to this prospectus will provide the specific terms of the plan of distribution. If any agents or underwriters are involved in the sale of any securities with respect to which this prospectus is being delivered, the names of such agents or underwriters and any applicable fees, commissions, discounts and over-allotment options will be set forth in a prospectus supplement. The price to the public of such securities and the net proceeds that we expect to receive from such sale will also be set forth in a prospectus supplement.

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.

TheThe date of this prospectus is ______, 2017., 2019



TABLE OF CONTENTSTable of Contents

 Page
RISK FACTORS2
2
3
SELLING STOCKHOLDERS3
5
VALIDITY OF COMMON STOCK7
7
7
8




ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and Exchange Commission, or SEC, using theutilizing a “shelf” registration process. Under this shelf registration process, the selling stockholderswe may from time to time,offer and sell, either individually or in combination, in one or more offerings selland in any combination of the common stocksecurities described in this prospectus, up to a total dollar amount of $100,000,000. This prospectus provides you with a general description of the securities we may offer.

Each time we offer securities under this prospectus, we will provide a prospectus supplement that will contain more specific information about the terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. The prospectus supplement and any related free writing prospectus that we may authorize to be provided to you may also add, update or change any of the information contained in this prospectus or in the documents that we have incorporated by reference into this prospectus. We urge you to read carefully this prospectus, any applicable prospectus supplement and any free writing prospectuses we have authorized for use in connection with a specific offering, together with the information incorporated herein by reference as described under the heading “Incorporation of Certain Information by Reference,” before buying any of the securities being offered.

This prospectus may not be used to consummate a sale of securities unless it is accompanied by a prospectus supplement.

You should rely only on the information contained in, or incorporated by reference into, this prospectus (as supplemented and amended).any applicable prospectus supplement, along with the information contained in any free writing prospectuses we have authorized for use in connection with a specific offering. We have not authorized anyone to provide you with different or additional information. This document mayprospectus is an offer to sell only be usedthe securities offered hereby, but only under circumstances and in jurisdictions where it is legallawful to sell these securities. do so.

The information containedappearing in this prospectus, (and in any applicable prospectus supplement or amendment to this prospectus)any related free writing prospectus is accurate only as of the date on the front of the document and any information we have incorporated by reference is accurate only as of the date of the document incorporated by reference, regardless of the time of delivery of this prospectus, any applicable prospectus supplement or any related free writing prospectus, or any sale of our common stock.a security. Our business, financial condition, results of operations and prospects may have changed since those dates.
We urge you
This prospectus contains summaries of certain provisions contained in some of the documents described herein, but reference is made to read carefully this prospectus (as supplemented and amended), together with the informationactual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been filed, will be filed or will be incorporated herein by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described below under the heading “Incorporation of Certain Information by Reference” before deciding whether to invest in any of the common stock being offered.section titled “Where You Can Find More Information.”

This prospectus contains and incorporates by reference market data and industry statistics and forecasts that are based on independent industry publications and other data that have been obtained from,publicly available information. Although we believe these sources are reliable, we do not guarantee the accuracy or compiled from,completeness of this information made available by third parties. Weand we have not independently verified their data. this information. Although we are not aware of any misstatements regarding the market and industry data presented in this prospectus and the documents incorporated herein by reference, these estimates involve risks and uncertainties and are subject to change based on various factors, including those discussed under the heading “Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus. Accordingly, investors should not place undue reliance on this information.

This prospectus and the information incorporated herein by reference includesinclude trademarks, service marks and trade names owned by us or other companies. All trademarks, service marks and trade names included or incorporated by reference into this prospectus, any applicable prospectus supplement or any related free writing prospectus are the property of their respective owners.


ii



PROSPECTUS SUMMARY

This summary highlights selected information appearingcontained elsewhere in this prospectus or incorporated by reference intoin this prospectus, and maydoes not contain all of the information that is importantyou need to you.consider in making your investment decision. You should carefully read thisthe entire prospectus, the applicable prospectus supplement and any related free writing prospectus, that we have authorized for use in connection with this offering carefully, including the risks and uncertainties included hereinof investing in our securities discussed under the heading “Risk Factors” beginning on page 2contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus. You should also carefully read the information incorporated by reference into this prospectus, including our financial statements, and the exhibits to the registration statement of which this prospectus is a part.

Unless the context suggests otherwise, references in this prospectus to “Enphase,” “we,” “us” and incorporated by reference from our most recent Annual Report on Form 10-K , before making an investment decision.“our” refer to Enphase Energy, Inc. and, where appropriate, its subsidiaries.

Company Overview
Enphase Energy, Inc. delivers simple, innovative and reliable

We are a global energy managementtechnology company, delivering smart, easy-to-use solutions that advanceconnect solar generation, storage and communications management on one intelligent platform. We revolutionized solar with our microinverter technology and produce the worldwide potential of renewable energy. Our semiconductor-based microinverter system converts direct current (DC) electricity to alternating current (AC) electricity at the individual solar module level and brings a system-based, high technology approach to solar energy generation leveraging our design expertise across power electronics, semiconductors, networking, and cloud-based software technologies. Our technology is designed to increase energy production, simplify design and installation, improve system uptime and reliability, reduce fire risk, and provide a platform for intelligent energy management. Since inception, weworld’s only truly integrated solar-plus-storage solution. We have shipped over 13more than 19 million microinverters, representing over 34 gigawatts of solar photovoltaic or PV,(“PV”) generating capacity, and more than 580,000855,000 Enphase residential and commercial systems have been deployed in over 100125 countries.

CorporateRisks Associated with our Business

Our business is subject to numerous risks, as described under the heading “Risk Factors” contained in the applicable prospectus supplement and in any free writing prospectuses we have authorized for use in connection with a specific offering, and under similar headings in the documents that are incorporated by reference into this prospectus.

Company Information

We were incorporated as PVI Solutions, Inc. in March 2006 in the State of Delaware and changed our name to Enphase Energy, Inc. in July 2007. Our principal corporate offices are located at 1420 N. McDowell Blvd., Petaluma, CA 94954, and our telephone number is (707) 774-7000. Our website is located at www.enphase.com. Information found on, or accessible through, our website is not a part of, and is not incorporated into, this prospectus, and you should not consider it part of this prospectus.prospectus or part of any prospectus supplement. Our website address is included in this document as an inactive textual reference only.

The OfferingSecurities We May Offer
The selling stockholders named in this prospectus
We may offer and sell up to 12,033,148 shares of our common stock.  Our common stock is currently listed on The NASDAQ Global Market under the symbol “ENPH.” Shares of common stock that may be offered under this prospectus will be fully paid and non-assessable. We will not receive any of the proceeds of sales by the selling stockholders of any of the common stock covered by this prospectus. Throughout this prospectus, when we refer to the shares of our common stock being registeredand preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in combination, up to a total dollar amount of $100,000,000, from time to time under this prospectus, together with the applicable prospectus supplement and any related free writing prospectus, at prices and on behalfterms to be determined by market conditions at the time of any offering. We may also offer common stock, preferred stock and/or debt securities upon the exercise of warrants. This prospectus provides you with a general description of the selling stockholders forsecurities we may offer. Each time we offer a type or series of securities under this prospectus, we will provide a prospectus supplement that will describe the specific amounts, prices and sale, we are referring to (i)other important terms of the shares issuedsecurities, including, to the selling stockholders pursuantextent applicable:

designation or classification;
aggregate principal amount or aggregate offering price;
maturity date, if applicable;
original issue discount, if any;
rates and times of payment of interest or dividends, if any;
redemption, conversion, exercise, exchange or sinking fund terms, if any;
conversion or exchange prices or rates, if any, and, if applicable, any provisions for changes to or adjustments in the conversion or exchange prices or rates and in the securities purchase agreementor other property receivable upon conversion or exchange;


ranking;
restrictive covenants, if any;
voting or other rights, if any;
conversion or exchange prices or rates, if any, and, if applicable, any provisions for changes to or adjustments in the conversion or exchange prices or rates and in the securities or other property receivable upon conversion or exchange; and
material or special U.S. federal income tax considerations, if any.

The applicable prospectus supplement and any related free writing prospectus that we entered into withmay authorize to be provided to you may also add, update or change any of the selling stockholders on January 9, 2017, and (ii) the common stock that may be issued upon exercise of warrants issued to the lenders party to the Amended and Restated Loan and Security Agreement dated February 10, 2017, and when we refer to the selling stockholdersinformation contained in this prospectus or in the documents we are referring tohave incorporated by reference. However, no prospectus supplement or free writing prospectus will offer a security that is not registered and described in this prospectus at the purchasers under the securities purchase agreement and the holderstime of the warrants, as applicable, their permitted transferees or other successors-in-interest that may be identified in a supplement to this prospectus or, if required, a post-effective amendment toeffectiveness of the registration statement of which this prospectus is a part.

We may sell the securities directly to investors or to or through agents, underwriters or dealers. We, and our agents or underwriters, reserve the right to accept or reject all or part of any proposed purchase of securities. If we do offer securities to or through agents or underwriters, we will include in the applicable prospectus supplement:

the names of those agents or underwriters;
applicable fees, discounts and commissions to be paid to them;
details regarding over-allotment or other options, if any; and
the net proceeds to us, if any.

THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE A SALE OF SECURITIES UNLESS IT IS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT.

Common Stock

We may issue shares of our common stock from time to time. The holders of our common stock are entitled to one vote for each share held of record on all matters submitted to a vote of stockholders. Subject to preferences that may be applicable to any outstanding shares of preferred stock, the holders of common stock are entitled to receive ratably such dividends as may be declared by our board of directors out of legally available funds. Upon our liquidation, dissolution or winding up, holders of our common stock are entitled to share ratably in all assets remaining after payment of liabilities and the liquidation preferences of any outstanding shares of preferred stock. Holders of common stock have no preemptive rights and no right to convert their common stock into any other securities. There are no redemption or sinking fund provisions applicable to our common stock. In this prospectus, we have summarized certain general features of the common stock under “Description of Capital Stock - Common stock.” We urge you, however, to read the applicable prospectus supplement (and any related free writing prospectus that we may authorize to be provided to you) related to any common stock being offered.

Preferred Stock

We may issue shares of our preferred stock from time to time, in one or more series. Our board of directors will determine the designations, voting powers, preferences and rights of the preferred stock, as well as the qualifications, limitations or restrictions thereof, including dividend rights, conversion rights, preemptive rights, terms of redemption or repurchase, liquidation preferences, sinking fund terms and the number of shares constituting any series or the designation of any series. Convertible preferred stock will be convertible into our common stock or exchangeable for other securities. Conversion may be mandatory or at the holder’s option and would be at prescribed conversion rates.



If we sell any series of preferred stock under this prospectus, we will fix the designations, voting powers, preferences and rights of the preferred stock of each series we issue under this prospectus, as well as the qualifications, limitations or restrictions thereof, in the certificate of designation relating to that series. We will file as an exhibit to the registration statement of which this prospectus is a part, or will incorporate by reference from reports that we file with the SEC, the form of any certificate of designation that contains the terms of the series of preferred stock we are offering. In this prospectus, we have summarized certain general features of the preferred stock under “Description of Capital Stock - Preferred stock.” We urge you, however, to read the applicable prospectus supplement (and any related free writing prospectus that we may authorize to be provided to you) related to the series of preferred stock being offered, as well as the complete certificate of designation that contains the terms of the applicable series of preferred stock.

Debt Securities

We may issue debt securities from time to time, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. While the terms we have summarized below will apply generally to any debt securities that we may offer under this prospectus, we will describe the particular terms of any debt securities that we may offer in more detail in the applicable prospectus supplement. The terms of any debt securities offered under a prospectus supplement may differ from the terms described below. Unless the context requires otherwise, whenever we refer to the indenture, we also are referring to any supplemental indentures that specify the terms of a particular series of debt securities.

We will issue the debt securities under the indenture that we will enter into with the trustee named in the indenture. The indenture will be qualified under the Trust Indenture Act of 1939, as amended, or the Trust Indenture Act. We have filed the form of indenture as an exhibit to the registration statement of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of the debt securities being offered will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.

The summary of material provisions of the debt securities and the indenture is subject to, and qualified in its entirety by reference to, all of the provisions of the indenture applicable to a particular series of debt securities. We urge you to read the applicable prospectus supplements and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete indenture that contains the terms of the debt securities.

Warrants

We may issue warrants for the purchase of common stock, preferred stock and/or debt securities in one or more series. We may issue warrants independently or in combination with common stock, preferred stock and/or debt securities. In this prospectus, we have summarized certain general features of the warrants under “Description of Warrants.” We urge you, however, to read the applicable prospectus supplement (and any related free writing prospectus that we may authorize to be provided to you) related to the particular series of warrants being offered, as well as any warrant agreements and warrant certificates that contain the terms of the warrants. We have filed forms of the warrant agreements and forms of warrant certificates containing the terms of the warrants that may be offered as exhibits to the registration statement of which this prospectus is a part. We will file as exhibits to the registration statement of which this prospectus is a part, or will incorporate by reference from reports that we file with the SEC, the form of warrant and/or the warrant agreement and warrant certificate, as applicable, that contain the terms of the particular series of warrants we are offering, and any supplemental agreements, before the issuance of such warrants.

Any warrants issued under this prospectus may be evidenced by warrant certificates. Warrants also may be issued under an applicable warrant agreement that we enter into with a warrant agent. We will indicate the name and address of the warrant agent, if applicable, in the prospectus supplement relating to the particular series of warrants being offered.



Use of Proceeds

Except as described in any applicable prospectus supplement or in any free writing prospectuses we have authorized for use in connection with a specific offering, we currently intend to use the net proceeds from the sale of the securities offered by us hereunder, if any, for working capital and general corporate purposes. See “Use of Proceeds” in this prospectus.

The Nasdaq Global Market Listing

Our common stock is listed on The Nasdaq Global Market under the symbol “ENPH.” The applicable prospectus supplement will contain information, where applicable, as to other listings, if any, on The Nasdaq Global Market or any other securities market or other exchange of the securities covered by the applicable prospectus supplement.



RISK FACTORS
An investment
Investing in our common stocksecurities involves a high degree of risk. Before deciding whether to invest in our common stock,securities, you should consider carefully the risks and uncertainties discusseddescribed under the heading “Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and discussed under the section titled “Risk Factors” contained in our annual reportmost recent Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filedas well as any amendments thereto reflected in subsequent filings with the SEC, on March 16, 2017, and incorporated by reference in this prospectus, as the same may be amended, supplemented or superseded by the risks and uncertainties described under similar headings in the other documents thatwhich are filed by us after the date hereof and incorporated by reference into this prospectus. Additional risks not currently known to us orprospectus in their entirety, together with other information in this prospectus, the documents incorporated by reference and any free writing prospectus that we currently believemay authorize for use in connection with this offering. The risks described in these documents are immaterialnot the only ones we face, but those that we consider to be material. Past financial performance may also significantly impairnot be a reliable indicator of future performance, and historical trends should not be used to anticipate results or trends in future periods. If any of these risks actually occurs, our business, operations.financial condition, results of operations or cash flow could be seriously harmed. This could cause the trading price of our common stock to decline, resulting in a loss of all or part of your investment. Please also read carefully the section below entitledtitled “Special Note Regarding Forward-Looking Statements.”

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus, any prospectus supplement and the documents incorporated by reference herein andor any free writingsuch prospectus we have authorized for use in connection with this offering containsupplement include 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 Securities Exchange Act of 1934, as amended, or the Exchange Act, and the Private Securities Litigation Reform Act of 1995. Also, documents that we incorporate by reference into this prospectus that we subsequently file with the SEC will contain forward-looking statements. Forward-looking statements are those that predict or describe future events or trends and that do not relate solely to historical matters. You can generally identify forward-looking statements as statements containing the words “may,” “will,” “could,” “should,” “expect,” “anticipate,” “intend,” “estimate,” “believe,” “project,” “plan,” “assume” or other similar expressions, or negatives of those expressions, although not all forward-looking statements contain these identifying words. All statements contained in or incorporated by reference into this prospectus regarding future operating or financial performance, business strategies, technology developments, financing and investment plans, competitive position, industry and regulatory environment, potential growth opportunities, and the effects of competition, expense levels, liquidity sources, timing of new product releases, involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements to be materially different from any future results, performancesperformance or achievements expressed or implied by the forward-looking statements. Some of the factors that we believe could affect our results include:

our ability to improve our liquidity to continue as a going concern and to achieve profitability;
our ability to reduce product costs and operating expenses;
the future demand for solar energy solutions;
the reduction, elimination or expiration of government subsidies and economic incentives for on-grid solar electricity applications;
the impact of tariffs and other government actions on the solar industry, our products and international trade;
our ability to achieve and realize the anticipated benefits of the Master Supply Agreement with SunPower that became effective upon the closing of the transactions under the Asset Purchase Agreement with SunPower;
our ability to achieve broader market acceptance of our microinverter systems;
our reliance on sole sourcesole-source and limited sourcelimited-source suppliers for key components and products;
changes in the retail price of electricity derived from the utility grid or alternative energy sources;
our ability to raise additional capital on favorable terms to execute on our current or future business opportunities;
changes in international trade policy or the imposition of new laws or regulations that materially harm our business;
the threat of global economic, capital markets and credit disruptions that pose risks for our business;
our ability to retain key personnel and effectively manage our workforce during our planned expansion into new markets;
the ability of potential owners of solar PV systems to secure financing on acceptable terms;


change in seasonal trends, natural disasters, construction cycles, terrorist or cyber-attacks, or other catastrophic events;
our ability to develop new and enhanced products in response to customer demands and rapid market and technological changes in the solar industry;
our ability to compete effectively with existing and new competitors; and
the success of competing solar solutions that are or become available.

While we believe that we have a reasonable basis for each forward-looking statement, we caution you that these statements are based on a combination of facts and factors currently known by us and our projections of the future,

about which we cannot be certain. We discuss many of these risks, uncertainties and other factors in greater detail under the heading “Risk Factors” contained in our annual report on Form 10-K for the fiscal year ended December 31, 2016,2018, filed with the SEC on March 16, 2017,15, 2019, and incorporated by reference in this prospectus, as the same may be amended, supplemented or superseded by the risks and uncertainties described under similar headings in the other documents that we file after the date hereof and are incorporated by reference into this prospectus. Given these risks, uncertainties and other factors, you should not place undue reliance on these forward-looking statements. Also, these forward-looking statements represent our estimates and assumptions only as of the date such forward-looking statements are made. You should carefully read this prospectus, together with the information incorporated herein by reference as described under the heading “Incorporation of Certain Information by Reference,” completely and with the understanding that our actual future results may be materially different from what we expect. We can give no assurances that any of the events anticipated by the forward-looking statements will occur or, if any of them do, what impact they will have on our business, results of operations and financial condition. We hereby qualify all of our forward-looking statements by these cautionary statements.

Except as required by law, we assume no obligation to update these forward-looking statements publicly, or to update the reasons actual results could differ materially from those anticipated in these forward-looking statements, even if new information becomes available in the future. We claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995 for all forward-looking statements.

USE OF PROCEEDS

Except as described in any applicable prospectus supplement or in any free writing prospectuses we have authorized for use in connection with a specific offering, we currently intend to use the net proceeds from the sale of the securities offered by us hereunder, if any, for working capital and general corporate purposes.

The selling stockholders will receive allamounts and timing of our use of the net proceeds from salesthis offering will depend on a number of factors, such as the timing and progress of our research and development efforts, the timing and progress of any partnering and commercialization efforts, technological advances and the competitive environment for our products. As of the common stock sold pursuant todate of this prospectus. We will receive no proceeds from salesprospectus, we cannot specify with certainty all of the common stock sold pursuantparticular uses for the net proceeds to this prospectus.us from the sale of the securities offered by us hereunder. Accordingly, our management will have broad discretion in the timing and application of these proceeds. Pending application of the net proceeds as described above, we intend to temporarily invest the proceeds in short-term, interest-bearing instruments.

SELLING STOCKHOLDERS
Private Placement SharesDESCRIPTION OF CAPITAL STOCK

On January 9, 2017, we entered into a securities purchase agreement with certainAs of the selling stockholders pursuant to which we issued and sold in a private placement an aggregatedate of 10,813,148this prospectus, our authorized capital stock consists of 150,000,000 shares of common stock, (the “Private Placement Shares”),$0.00001 par value per share, and 10,000,000 shares of preferred stock, $0.00001 par value per share. A description of material terms and provisions of our amended and restated certificate of incorporation, or certificate of incorporation, and amended and restated bylaws, affecting the rights of holders of our capital stock is set forth below. The description is intended as a summary, and is qualified in its entirety by reference to our certificate of incorporation and the amended and restated bylaws.

Common stock 

Dividend rights. Subject to preferences that may apply to shares of preferred stock outstanding at the time, the holders of outstanding shares of our common stock are entitled to receive dividends out of funds legally available if our board of directors, in its discretion, determines to declare dividends and then only at the times and in the amounts that our board of directors may determine.



Voting rights. Each holder of common stock is entitled to one vote for an aggregate purchase priceeach share of approximately $10.0 million. Pursuantcommon stock held on all matters submitted to a vote of stockholders. Our certificate of incorporation does not provide for the securities purchase agreement,right of stockholders to cumulate votes for the election of directors. Our certificate of incorporation establishes a classified board of directors, which is divided into three classes with staggered three-year terms. Only one class of directors will be elected at each annual meeting of our stockholders, with the other classes continuing for the remainder of their respective three-year terms. These provisions in our amended and restated certificate of incorporation could discourage potential takeover attempts. See “Anti-Takeover Effects of Delaware Law and Our Charter Documents” below.

No preemptive or similar rights. Our common stock is not entitled to preemptive rights and is not subject to conversion or redemption provisions. The rights, preferences and privileges of the holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of any series of our preferred stock that we agreedmay designate and issue in the future.

Right to filereceive liquidation distributions. Upon our dissolution, liquidation or winding-up, the registration statementassets legally available for distribution to our stockholders are distributable ratably among the holders of whichour common stock, subject to prior satisfaction of all outstanding debt and liabilities and the preferential rights and payment of liquidation preferences, if any, on any outstanding shares of preferred stock.

Fully Paid and Nonassessable. All outstanding shares of common stock are, and all shares of common stock we may issue under this prospectus will be, fully paid and nonassessable.

The rights of the holders of our common stock are subject to, and may be adversely affected by, the rights of holders of shares of any preferred stock that we may designate and issue in the future.

Preferred stock 

We are authorized, subject to limitations prescribed by Delaware law, to issue up to 10,000,000 shares of preferred stock in one or more series established by our board of directors. Our board of directors is a partauthorized to coverestablish from time to time the resalenumber of shares to be included in each series and to fix the designation, powers, preferences and rights of the shares issued toof each series and any of its qualifications, limitations or restrictions. Our board of directors can also increase or decrease the selling stockholders, and to keep such registration statement effective untilnumber of shares of any series, but not below the date on which allnumber of shares of that series then outstanding, without any further vote or action by our stockholders. Our board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the 10,813,148 shares registered for resaleholders of the common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring, discouraging or preventing a change in control of our company and may adversely affect the market price of our common stock and the voting and other rights of the holders of our common stock.

We will fix the designations, voting powers, preferences and rights of the preferred stock of each series we issue under this registration statement have been soldprospectus, as well as the qualifications, limitations or can be sold publicly without restriction or limitation under Rule 144 underrestrictions thereof, in the Securities Act. 
Warrant Shares
On February 10, 2017, we entered intocertificate of designation relating to that series. We will file as an Amended and Restated Loan and Security Agreement (the “Loan Agreement”) with the lenders party thereto (the “Lenders”), Cortland Capital Market Services LLC, as administrative agent, and Obsidian Agency Services, Inc., as collateral agent, which amended and restated that certain Loan and Security Agreement, dated as of July 8, 2016 (as amended by that certain First Amendment to Loan and Security Agreement, dated as of December 27, 2016, the “Original Loan Agreement”), by and among Enphase, the lenders party thereto and Obsidian Agency Services, Inc., as administrative agent and collateral agent. The Loan Agreement provides for a $25.0 million secured term loan to Enphase (the “New Term Loan”), which is in addition to the $25.0 million secured term loan borrowed by Enphase under the Original Loan Agreement. In connection with the New Term Loan, Enphase issued to the Lenders warrants to purchase an aggregate 1,220,000 shares of our Common Stock at an exercise price of $1.05 per share (the “Warrant Shares”). The warrants have a term of seven years and contain a “cashless exercise” feature that allows the holder to exercise the warrant without a cash payment upon the terms set forth therein.
We are registering the resale of the Private Placement Shares issued pursuant to the securities purchase agreement and the Warrant Shares issuable upon exercise of the warrants to permit each of the selling stockholders identified below, or their permitted transferees or other successors-in-interest that may be identified in a supplement

to this prospectus or, if required, a post-effective amendmentexhibit to the registration statement of which this prospectus is a part, to resell or otherwise disposewill incorporate by reference from reports that we file with the SEC, the form of any certificate of designation that contains the terms of the sharesseries of preferred stock we are offering. We will describe in the manner contemplated under “Planapplicable prospectus supplement the terms of Distribution” in this prospectus (as maythe series of preferred stock being offered, including, to the extent applicable:

the title and stated value;
the number of shares we are offering;
the liquidation preference per share;
the purchase price;
the dividend rate, period and payment date and method of calculation for dividends;
whether dividends will be supplementedcumulative or non-cumulative and, amended). This prospectus coversif cumulative, the date from which dividends will accumulate;
the procedures for any auction and remarketing, if applicable;
the provisions for a sinking fund, if applicable;


the provisions for redemption or repurchase, if applicable, and any restrictions on our ability to exercise those redemption and repurchase rights;
any listing of the preferred stock on any securities exchange or market;
whether the preferred stock will be convertible into our common stock, and, if applicable, the conversion price, or how it will be calculated, and the conversion period;
whether the preferred stock will be exchangeable into debt securities, and, if applicable, the exchange price, or how it will be calculated, and the exchange period;
voting rights of the preferred stock;
preemptive rights, if any;
restrictions on transfer, sale or other dispositionassignment;
whether interests in the preferred stock will be represented by depositary shares;
a discussion of any material or special U.S. federal income tax considerations applicable to the preferred stock;
the relative ranking and preferences of the preferred stock as to dividend rights and rights if we liquidate, dissolve or wind up our affairs;
any limitations on the issuance of any class or series of preferred stock ranking senior to or on a parity with the series of preferred stock as to dividend rights and rights if we liquidate, dissolve or wind up our affairs; and
any other specific terms, preferences, rights or limitations of, or restrictions on, the preferred stock.

Anti-Takeover Effects of Delaware Law and Our Charter Documents 

Some of the provisions of Delaware law may have the effect of delaying, deferring, discouraging or preventing another person from acquiring control of our company.

We are subject to Section 203 of the Delaware General Corporation Law, which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;
upon closing of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the voting stock outstanding (but not the outstanding voting stock owned by the selling stockholders of upinterested stockholder) those shares owned by (1) persons who are directors and also officers and (2) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the total numberplan will be tendered in a tender or exchange offer; or
on or after such date, the business combination is approved by the board of sharesdirectors and authorized at an annual or special meeting of commonthe stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock issuedthat is not owned by the interested stockholder.

In general, Section 203 defines business combination to include the following:

any merger or consolidation involving the corporation and the interested stockholder;
any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;
subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the sellinginterested stockholder;
any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation beneficially owned by the interested stockholder; or
the receipt by the interested stockholder of the benefit of any loss, advances, guarantees, pledges or other financial benefits by or through the corporation.



In general, Section 203 defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.

A Delaware corporation may “opt out” of these provisions with an express provision in its original certificate of incorporation or an express provision in its certificate of incorporation or bylaws resulting from a stockholders’ amendment approved by at least a majority of the outstanding voting shares. We have not elected to “opt out” of these provisions. The statute could prohibit or delay mergers or other takeover or change in control attempts and, accordingly, may discourage attempts to acquire us. Certain provisions in our certificate of incorporation and our amended and restated bylaws could have an effect of delaying, deferring or preventing a change in control. For a description of such provisions, see “Risk Factors - Our charter documents and Delaware law could prevent a takeover that stockholders consider favorable and could also reduce the market price of our stock” in our Form 10‑K filed with the SEC on March 15, 2019, incorporated by reference to this prospectus.

Choice of Forum

Our certificate of incorporation provides that the Court of Chancery of the State of Delaware will be the exclusive forum for any derivative action or proceeding brought on our behalf, any action asserting a breach of fiduciary duty owed by any director, officer or employee to us or our stockholders, any action asserting a claim against us arising pursuant to the Delaware General Corporation Law or any action asserting a claim against us that is governed by the internal affairs doctrine. However, several lawsuits involving other companies have been brought challenging the validity of choice of forum provisions in certificates of incorporation, and it is possible that a court could rule that such provision is inapplicable or unenforceable.

Transfer Agent and Registrar

American Stock Transfer & Trust Company, LLC is the transfer agent and registrar for our common stock.

Listing on the Nasdaq Global Market 

Our common stock is listed on the Nasdaq Global Market under the trading symbol “ENPH”.

DESCRIPTION OF DEBT SECURITIES

We may issue debt securities purchase agreement andfrom time to time, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. While the Warrant Shares.  Throughoutterms we have summarized below will apply generally to any debt securities that we may offer under this prospectus, whenwe will describe the particular terms of any debt securities that we may offer in more detail in the applicable prospectus supplement. The terms of any debt securities offered under a prospectus supplement may differ from the terms described below. Unless the context requires otherwise, whenever we refer to the shares of our common stock being registered on behalf of the selling stockholders,indenture, we also are referring to any supplemental indentures that specify the Private Placement Shares and toterms of a particular series of debt securities.

We will issue the Warrant Shares, and when we refer to the selling stockholders in this prospectus, we are referring to the purchasersdebt securities under the securities purchase agreement andindenture that we will enter into with the Lenderstrustee named in the indenture. The indenture will be qualified under the Loan Agreement and,Trust Indenture Act of 1939, as applicable, their permitted transfereesamended, or other successors-in-interest that may be identified in a supplement to this prospectus or, if required, a post-effective amendmentthe Trust Indenture Act. We have filed the form of indenture as an exhibit to the registration statement of which this prospectus is a part.
The selling stockholders may sell some, all or nonepart, and supplemental indentures and forms of their shares. We do not know how longdebt securities containing the selling stockholders will hold the shares before selling them, and we currently have no agreements, arrangements or understandings with the selling stockholders regarding the sale or other disposition of anyterms of the shares. The shares covered hereby may bedebt securities being offered from time to time by the selling stockholders.
The following table sets forth the name of each selling stockholder, the number and percentage of our common stock beneficially owned by the selling stockholders as of March 1, 2017, the number of shares that may be offered under this prospectus, and the number and percentage of our common stock beneficially owned by the selling stockholders assuming all of the shares covered hereby are sold. Beneficial ownership is determined in accordance with the rules of the SEC and includes voting or investment power with respect to our common stock. Generally, a person “beneficially owns” shares of our common stock if the person has or shares with others the right to vote those shares or to dispose of them, or if the person has the right to acquire voting or disposition rights within 60 days. In this regard, solely for purposes of the following table, we have assumed that the warrants will be exercisable for shares our common stock within 60 days of March 1, 2017.
All information contained in the table below and the footnotes thereto is based upon information providedfiled as exhibits to us by the selling stockholders. The information in the table below and the footnotes thereto regarding shares of common stock to be beneficially owned after the offering assumes the sale of all shares being offered by the selling stockholders under this prospectus. The percentage of shares owned after the offering is based on 82,525,301 shares of common stock outstanding as of March 6, 2017. Unless otherwise indicated in the footnotes to this table, we believe that each of the selling stockholders named in this table has sole voting and investment power with respect to the shares of common stock indicated as beneficially owned.
     After Offering 
Name and Address  
Number of
Shares
Offered
(5)
 Number of
Shares
Beneficially
Owned
 
Percentage of
Shares
Beneficially
Owned
(1)
 
Private Placement Shares        
Thurman John Rodgers(2)
  5,406,574 5,406,574 0% 
Foris Ventures, LLC(3)
  5,406,574 5,406,574 0% 
         
Warrant Shares(4)
        
Tennenbaum Special Situations IX, LLC  611,885 611,885 0% 
Tennenbaum Energy Opportunities Co, LLC  170,800 170,800 0% 
Tennenbaum Special Situations IX-O, L.P.  152,221 152,221 0% 
Tennenbaum Special Situations IX-C, L.P.  114,165 114,165 0% 
Tennenbaum Special Situations IX-A, L.P.  122,129 122,129 0% 
Tennenbaum Senior Loan Fund IV-B, LP  48,800 48,800 0% 



(1)     Based on 85,525,301 shares of common stock outstanding as of March 6, 2017.
(2)    The shares reflected herein are held of record by Rodgers Massey Revocable Living Trust dtd 4/4/11. Mr. Rodgers has the sole power to vote or to direct the vote and the sole power to dispose or to direct the disposition of these shares.
(3)     Vallejo Ventures Trust (“VVT”), the member of Foris Ventures, LLC (“FV”), may be deemed to have sole power to vote these shares, and L. John Doerr (“John Doerr”) and Ann Doerr (“Ann Doerr”), the trustees of VVT, and Barbara Hager (“Barbara Hager”), the special trustee of VVT, may be deemed to have shared power to vote these shares.
(4)     Each of Tennenbaum Energy Opportunities Co, LLC, Tennenbaum Special Situations IX-O, L.P., Tennenbaum Special Situations IX-C, L.P., Tennenbaum Special Situations IX-A, L.P. and Tennenbaum Senior Loan Fund IV-B, LP are affiliates of Tennenbaum Capital Partners, LLC. The address for Tennenbaum Capital Partners, LLC is 2951 28th Street, Suite 1000, Santa Monica, California 90405.
(5)    The number of shares offered hereby, for each selling stockholder, consists solely of the Private Placement Shares issued pursuant to the securities purchase agreement and the Warrant Shares that may be issued upon exercise of the outstanding warrants.
Relationships with the Selling Stockholders
Positions or Offices with Enphase
Set forth below is information with respect to the positions or offices the selling stockholders or their affiliates or associates have or have had with us during the past three years:
Certain entities affiliated with L. John Doerr, one of the managing directors of KPCB GGF Associates, LLC, an stockholder beneficially owning in excess of 5% of our common stock, invested in our common stock pursuant to the securities purchase agreement.
In connection with the investment in our common stock by entities affiliated with Thurman John Rodgers pursuant to the securities purchase agreement dated January 9, 2017, Mr. Rogers was appointed to our Board and was also appointed as a member of the Compensation Committee and Nominating and Corporate Governance Committee of the Board.
Other Relationships
Each of Tennenbaum Energy Opportunities Co, LLC, Tennenbaum Special Situations IX-O, L.P., Tennenbaum Special Situations IX-C, L.P., Tennenbaum Special Situations IX-A, L.P. and Tennenbaum Senior Loan Fund IV-B, LP are Lenders pursuant to the Loan Agreement. The term loans provided for under the Loan Agreement are secured by a first-priority security interest on substantially all assets of Enphase.
Except with respect to the foregoing, none of the selling stockholders has, or within the past three years has had, any position, office or other material relationship with us.
PLAN OF DISTRIBUTION
We are registering the shares of common stock issued to the selling stockholders to permit the resale of these shares of common stock by the selling stockholders from time to time from after the date of this prospectus. We will not receive any of the proceeds from the sale by the selling stockholders of the shares of common stock. We will bear all fees and expenses incident to our obligation to register the shares of common stock.
Each selling stockholder may, from time to time, sell any or all of their shares of common stock covered hereby on The NASDAQ Global Market or any other stock exchange, market or trading facility on which the shares are traded or in private transactions. These sales may be at fixed prices, at prevailing market prices at the time of the

sale, at varying prices determined at the time of sale, or privately negotiated prices. A selling stockholder may use any one or more of the following methods when selling shares:
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 the rules of the applicable exchange;
privately negotiated transactions;
settlement of short sales, to the extent permitted by law;
in transactions through broker-dealers that agree with the selling stockholders to sell a specified number of such shares at a stipulated price per share;
through the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise;
a combination of any such methods of sale; or
any other method permitted pursuant to applicable law.
The selling stockholders may also sell the shares of common stock under Rule 144 under the Securities Act, if available, rather than under this prospectus.
Broker-dealers engaged by the selling stockholders may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling stockholders (or, if any broker-dealer acts as agent for the purchaser of shares, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with FINRA Rule 2440; and in the case of a principal transaction a markup or markdown in compliance with FINRA IM-2440-1.
In connection with the sale of the shares of common stock or interests therein, the selling stockholders 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 the positions they assume. The selling stockholders may also sell the shares of common stock short and deliver these securities to close out their short positions or to return borrowed shares in connection with such short sales, or loan or pledge the shares of common stock to broker-dealers that in turn may sell these securities. The selling stockholders may also enter into option or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares of common stock 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).
The selling stockholders and any broker-dealers or agents that are involved in selling the shares of common stock 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 selling stockholders, 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. Selling stockholders who are “underwriters” within the meaning of Section 2(11) of the Securities Act will be subject to the prospectus delivery requirements of the Securities Act and may be subject to certain statutory liabilities of, including but not limited to, Sections 11, 12 and 17 of the Securities Act and Rule 10b-5 under the Exchange Act. Each selling stockholder has informed us that it is not a registered broker-dealer or an

affiliate of a registered broker-dealer. In no event shall any broker-dealer receive fees, commissions and markups which, in the aggregate, would exceed eight percent (8%).
We are required to pay certain fees and expenses incurred by us incident to the registration of the Private Placement Shares and the Warrant Shares. We have agreed to indemnify the selling stockholders against certain losses, claims, damages and liabilities, including liabilities under the Securities Act, and the selling stockholders may be entitled to contribution. We may be indemnified by the selling stockholders against certain losses, claims, damages and liabilities, including liabilities under the Securities Act that may arise from any written information furnished to us by the selling stockholders specifically for use in this prospectus, or we may be entitled to contribution.
The selling stockholders will be subject to the prospectus delivery requirements of the Securities Act including Rule 172 thereunder unless an exemption therefrom is available.
With respect to the Private Placement Shares and the Warrant Shares, we agreed to cause the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.

The following summary of material provisions of the debt securities and the indenture is subject to, remain effective until the date on whichand qualified in its entirety by reference to, all of the shares registeredprovisions of the indenture applicable to a particular series of debt securities. We urge you to read the applicable prospectus supplements and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete indenture that contains the terms of the debt securities.



General

The indenture does not limit the amount of debt securities that we may issue. It provides that we may issue debt securities up to the principal amount that we may authorize and may be in any currency or currency unit that we may designate. Except for resalethe limitations on consolidation, merger and sale of all or substantially all of our assets contained in the indenture, the terms of the indenture do not contain any covenants or other provisions designed to give holders of any debt securities protection against changes in our operations, financial condition or transactions involving us.

We may issue the debt securities issued under the registration statement have been sold or canindenture as “discount securities,” which means they may be sold publicly without restrictionat a discount below their stated principal amount. These debt securities, as well as other debt securities that are not issued at a discount, may be issued with “original issue discount,” or limitation under Rule 144 underOID, for U.S. federal income tax purposes because of interest payment and other characteristics or terms of the Securities Act. The shares of common stockdebt securities. Material U.S. federal income tax considerations applicable to debt securities issued with OID will be sold only through registered or licensed brokers or dealers if required underdescribed in more detail in any applicable state securities laws. In addition, in certain states, the shares of common stock covered hereby may not be sold unless they have been registered or qualified for saleprospectus supplement.

We will describe in the applicable stateprospectus supplement the terms of the series of debt securities being offered, including:

the title of the series of debt securities;
any limit upon the aggregate principal amount that may be issued;
the maturity date or an exemption from dates;
the registrationform of the debt securities of the series;
the applicability of any guarantees;
whether or qualification requirementnot the debt securities will be secured or unsecured, and the terms of any secured debt;
whether the debt securities rank as senior debt, senior subordinated debt, subordinated debt or any combination thereof, and the terms of any subordination;
if the price (expressed as a percentage of the aggregate principal amount thereof) at which such debt securities will be issued is availablea price other than the principal amount thereof, the portion of the principal amount thereof payable upon declaration of acceleration of the maturity thereof, or if applicable, the portion of the principal amount of such debt securities that is convertible into another security or the method by which any such portion shall be determined;
the interest rate or rates, which may be fixed or variable, or the method for determining the rate and is complied with.the date interest will begin to accrue, the dates interest will be payable and the regular record dates for interest payment dates or the method for determining such dates;
Underour right, if any, to defer payment of interest and the maximum length of any such deferral period;
if applicable, rulesthe date or dates after which, or the period or periods during which, and regulations under the Exchange Act,price or prices at which, we may, at our option, redeem the series of debt securities pursuant to any person engagedoptional or provisional redemption provisions and the terms of those redemption provisions;
the date or dates, if any, on which, and the price or prices at which we are obligated, pursuant to any mandatory sinking fund or analogous fund provisions or otherwise, to redeem, or at the holder’s option to purchase, the series of debt securities and the currency or currency unit in which the debt securities are payable;
the denominations in which we will issue the series of debt securities, if other than denominations of $1,000 and any integral multiple thereof;
any and all terms, if applicable, relating to any auction or remarketing of the debt securities of that series and any security for our obligations with respect to such debt securities and any other terms which may be advisable in connection with the marketing of debt securities of that series;
whether the debt securities of the series shall be issued in whole or in part in the distributionform of a global security or securities; the terms and conditions, if any, upon which such global security or securities may be exchanged in whole or in part for other individual securities; and the depositary for such global security or securities;


if applicable, the provisions relating to conversion or exchange of any debt securities of the sharesseries and the terms and conditions upon which such debt securities will be so convertible or exchangeable, including the conversion or exchange price, as applicable, or how it will be calculated and may be adjusted, any mandatory or optional (at our option or the holders’ option) conversion or exchange features, the applicable conversion or exchange period and the manner of common stock may not simultaneously engagesettlement for any conversion or exchange;
if other than the full principal amount thereof, the portion of the principal amount of debt securities of the series which shall be payable upon declaration of acceleration of the maturity thereof;
additions to or changes in market making activitiesthe covenants applicable to the particular debt securities being issued, including, among others, the consolidation, merger or sale covenant;
additions to or changes in the events of default with respect to the securities and any change in the right of the trustee or the holders to declare the principal, premium, if any, and interest, if any, with respect to such securities to be due and payable;
additions to or changes in or deletions of the provisions relating to covenant defeasance and legal defeasance;
additions to or changes in the provisions relating to satisfaction and discharge of the indenture;
additions to or changes in the provisions relating to the modification of the indenture both with and without the consent of holders of debt securities issued under the indenture;
the currency of payment of debt securities if other than U.S. dollars and the manner of determining the equivalent amount in U.S. dollars;
whether interest will be payable in cash or additional debt securities at our or the holders’ option and the terms and conditions upon which the election may be made;
the terms and conditions, if any, upon which we will pay amounts in addition to the stated interest, premium, if any and principal amounts of the debt securities of the series to any holder that is not a “United States person” for federal tax purposes;
any restrictions on transfer, sale or assignment of the debt securities of the series; and
any other specific terms, preferences, rights or limitations of, or restrictions on, the debt securities, any other additions or changes in the provisions of the indenture, and any terms that may be required by us or advisable under applicable laws or regulations.

Conversion or Exchange Rights

We will set forth in the applicable prospectus supplement the terms on which a series of debt securities may be convertible into or exchangeable for our common stock or our other securities. We will include provisions as to settlement upon conversion or exchange and whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of our common stock foror our other securities that the applicable restricted period, as defined in Regulation M, prior to the commencementholders of the distribution. In addition, the selling stockholders willseries of debt securities receive would be subject to adjustment.

Consolidation, Merger or Sale

Unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, the indenture will not contain any covenant that restricts our ability to merge or consolidate, or sell, convey, transfer or otherwise dispose of our assets as an entirety or substantially as an entirety. However, any successor to or acquirer of such assets (other than a subsidiary of ours) must assume all of our obligations under the indenture or the debt securities, as appropriate.

Events of Default under the Indenture

Unless we provide otherwise in the prospectus supplement applicable to a particular series of debt securities, the following are events of default under the indenture with respect to any series of debt securities that we may issue:

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


if we fail to pay the principal of, or premium, if any, on any series of debt securities as and when the same shall become due and payable whether at maturity, upon redemption, by declaration or otherwise, or in any payment required by any sinking or analogous fund established with respect to such series; provided, however, that a valid extension of the maturity of such debt securities in accordance with the terms of any indenture supplemental thereto shall not constitute a default in the payment of principal or premium, if any;
if we fail to observe or perform any other covenant or agreement contained in the debt securities or the indenture, other than a covenant specifically relating to another series of debt securities, and our failure continues for 90 days after we receive written notice of such failure, requiring the same to be remedied and stating that such is a notice of default thereunder, from the trustee or holders of at least 25% in aggregate principal amount of the outstanding debt securities of the applicable series; and
if specified events of bankruptcy, insolvency or reorganization occur.

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

The holders of a majority in principal amount of the outstanding debt securities of an affected series may waive any default or event of default with respect to the series and its consequences, except defaults or events of default regarding payment of principal, premium, if any, or interest, unless we have cured the default or event of default in accordance with the indenture. Any waiver shall cure the default or event of default.

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

the direction so given by the holder is not in conflict with any law or the applicable indenture; and
subject to its duties under the Trust Indenture Act, the trustee need not take any action that might involve it in personal liability or might be unduly prejudicial to the holders not involved in the proceeding.

A holder of the debt securities of any series will have the right to institute a proceeding under the indenture or to appoint a receiver or trustee, or to seek other remedies only if:

the holder has given written notice to the trustee of a continuing event of default with respect to that series;
the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series have made written request;
such holders have offered to the trustee indemnity satisfactory to it against the costs, expenses and liabilities to be incurred by the trustee in compliance with the request; and
the trustee does not institute the proceeding, and does not receive from the holders of a majority in aggregate principal amount of the outstanding debt securities of that series other conflicting directions within 90 days after the notice, request and offer.

These limitations do not apply to a suit instituted by a holder of debt securities if we default in the payment of the principal, premium, if any, or interest on, the debt securities.

We will periodically file statements with the trustee regarding our compliance with specified covenants in the indenture.



Modification of Indenture; Waiver

We and the trustee may change an indenture without the consent of any holders with respect to specific matters:

to cure any ambiguity, defect or inconsistency in the indenture or in the debt securities of any series;
to comply with the provisions described above under “Description of Debt Securities-Consolidation, Merger or Sale;”
to provide for uncertificated debt securities in addition to or in place of certificated debt securities;
to add to our covenants, restrictions, conditions or provisions such new covenants, restrictions, conditions or provisions for the benefit of the holders of all or any series of debt securities, to make the occurrence, or the occurrence and the continuance, of a default in any such additional covenants, restrictions, conditions or provisions an event of default or to surrender any right or power conferred upon us in the indenture;
to add to, delete from or revise the conditions, limitations, and restrictions on the authorized amount, terms, or purposes of issue, authentication and delivery of debt securities, as set forth in the indenture;
to make any change that does not adversely affect the interests of any holder of debt securities of any series in any material respect;
to provide for the issuance of and establish the form and terms and conditions of the debt securities of any series as provided above under “Description of Debt Securities-General” to establish the form of any certifications required to be furnished pursuant to the terms of the indenture or any series of debt securities, or to add to the rights of the holders of any series of debt securities;
to evidence and provide for the acceptance of appointment under any indenture by a successor trustee; or
to comply with any requirements of the SEC in connection with the qualification of any indenture under the Trust Indenture Act.

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

extending the fixed maturity of any debt securities of any series;
reducing the principal amount, reducing the rate of or extending the time of payment of interest, or reducing any premium payable upon the redemption of any series of any debt securities; or
reducing the percentage of debt securities, the holders of which are required to consent to any amendment, supplement, modification or waiver.

Discharge

Each indenture provides that we can elect to be discharged from our obligations with respect to one or more series of debt securities, except for specified obligations, including obligations to:

provide for payment;
register the transfer or exchange of debt securities of the series;
replace stolen, lost or mutilated debt securities of the series;
pay principal of and premium and interest on any debt securities of the series;
maintain paying agencies;
hold monies for payment in trust;
recover excess money held by the trustee;
compensate and indemnify the trustee; and
appoint any successor trustee.



In order to exercise our rights to be discharged, we must deposit with the trustee money or government obligations sufficient to pay all the principal of, any premium, if any, and interest on, the debt securities of the series on the dates payments are due.

Form, Exchange and Transfer

We will issue the debt securities of each series only in fully registered form without coupons and, unless we provide otherwise in the applicable prospectus supplement, in denominations of $1,000 and any integral multiple thereof. The indenture provides that we may issue debt securities of a series in temporary or permanent global form and as book-entry securities that will be deposited with, or on behalf of, The Depository Trust Company, or DTC, or another depositary named by us and identified in the applicable prospectus supplement with respect to that series. To the extent the debt securities of a series are issued in global form and as book-entry, a description of terms relating to any book-entry securities will be set forth in the applicable prospectus supplement.

At the option of the holder, subject to the terms of the indenture and the limitations applicable to global securities described in the applicable prospectus supplement, the holder of the debt securities of any series can exchange the debt securities for other debt securities of the same series, in any authorized denomination and of like tenor and aggregate principal amount.

Subject to the terms of the indenture and the limitations applicable to global securities set forth in the applicable prospectus supplement, holders of the debt securities may present the debt securities for exchange or for registration of transfer, duly endorsed or with the form of transfer endorsed thereon duly executed if so required by us or the security registrar, at the office of the security registrar or at the office of any transfer agent designated by us for this purpose. Unless otherwise provided in the debt securities that the holder presents for transfer or exchange, we will impose no service charge for any registration of transfer or exchange, but we may require payment of any taxes or other governmental charges.

We will name in the applicable prospectus supplement the security registrar, and any transfer agent in addition to the security registrar, that we initially designate for any debt securities. We may at any time designate additional transfer agents or rescind the designation of any transfer agent or approve a change in the office through which any transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for the debt securities of each series.

If we elect to redeem the debt securities of any series, we will not be required to:

issue, register the transfer of, or exchange any debt securities of that series during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption of any debt securities that may be selected for redemption and ending at the close of business on the day of the mailing; or
register the transfer of or exchange any debt securities so selected for redemption, in whole or in part, except the unredeemed portion of any debt securities we are redeeming in part.

Information Concerning the Trustee

The trustee, other than during the occurrence and continuance of an event of default under an indenture, undertakes to perform only those duties as are specifically set forth in the applicable indenture. Upon an event of default under an indenture, the trustee must use the same degree of care as a prudent person would exercise or use in the conduct of his or her own affairs. Subject to this provision, the trustee is under no obligation to exercise any of the powers given it by the indenture at the request of any holder of debt securities unless it is offered reasonable security and indemnity against the costs, expenses and liabilities that it might incur.

Payment and Paying Agents

Unless we otherwise indicate in the applicable prospectus supplement, we will make payment of the interest on any debt securities on any interest payment date to the person in whose name the debt securities, or one or more predecessor securities, are registered at the close of business on the regular record date for the interest.



We will pay principal of and any premium and interest on the debt securities of a particular series at the office of the paying agents designated by us, except that unless we otherwise indicate in the applicable prospectus supplement, we will make interest payments by check that we will mail to the holder or by wire transfer to certain holders. Unless we otherwise indicate in the applicable prospectus supplement, we will designate the corporate trust office of the trustee as our sole paying agent for payments with respect to debt securities of each series. We will name in the applicable prospectus supplement any other paying agents that we initially designate for the debt securities of a particular series. We will maintain a paying agent in each place of payment for the debt securities of a particular series.

All money we pay to a paying agent or the trustee for the payment of the principal of or any premium or interest on any debt securities that remains unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and the holder of the debt security thereafter may look only to us for payment thereof.

Governing Law

The indenture and the debt securities will be governed by and construed in accordance with the internal laws of the State of New York, except to the extent that the Trust Indenture Act of 1939 is applicable.

DESCRIPTION OF WARRANTS

The following description, together with the additional information that we include in any applicable prospectus supplement and in any related free writing prospectus that we may authorize to be distributed to you, summarizes the material terms and provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M,warrants that we may offer under this prospectus, which may limit the timingconsist of purchases and sales of shares ofwarrants to purchase common stock, preferred stock or debt securities, and be issued in one or more series. Warrants may be offered independently or in combination with other securities offered by any prospectus supplement. While the selling stockholders orterms we have summarized below will apply generally to any other person. We will make copies ofwarrants that we may offer under this prospectus, availablewe will describe the particular terms of any series of warrants in more detail in the applicable prospectus supplement. The following description of warrants will apply to the selling stockholders andwarrants offered by this prospectus unless we provide otherwise in the applicable prospectus supplement. The applicable prospectus supplement for a particular series of warrants may specify different or additional terms.

We have informed themfiled forms of the need to deliver a copywarrant agreements and forms of this prospectus at or prior towarrant certificates containing the timeterms of the sale (including by compliance with Rule 172 under the Securities Act).
There canwarrants that may be no assurance that any selling stockholder will sell any or all of the shares of common stock we registered on behalf of the selling stockholders pursuantoffered as exhibits to the registration statement of which this prospectus formsis a part.
Once sold under We will file as exhibits to the registration statement of which this prospectus formsis a part, or will incorporate by reference from reports that we file with the SEC, the form of warrant and/or the warrant agreement and warrant certificate, as applicable, that contain the terms of the particular series of warrants we are offering, and any supplemental agreements, before the issuance of such warrants. The following summaries of material terms and provisions of the warrants are subject to, and qualified in their entirety by reference to, all the provisions of the form of warrant and/or the warrant agreement and warrant certificate, as applicable, and any supplemental agreements applicable to a particular series of warrants that we may offer under this prospectus. We urge you to read the applicable prospectus supplement related to the particular series of warrants that we may offer under this prospectus, as well as any related free writing prospectuses, and the complete form of warrant and/or the warrant agreement and warrant certificate, as applicable, and any supplemental agreements, that contain the terms of the warrants.

General

We will describe in the applicable prospectus supplement the terms of the series of warrants being offered, including:

the offering price and aggregate number of warrants offered;
the currency for which the warrants may be purchased;
if applicable, the designation and terms of the securities with which the warrants are issued and the number of warrants issued with each such security or each principal amount of such security;
in the case of warrants to purchase debt securities, the principal amount of debt securities purchasable upon exercise of one warrant and the price at, and currency in which, this principal amount of debt securities may be purchased upon such exercise;


in the case of warrants to purchase common stock or preferred stock, the number of shares of common stock or preferred stock, as the case may be, purchasable upon the exercise of one warrant and the price at which these shares may be purchased upon such exercise;
the effect of any merger, consolidation, sale or other disposition of our business on the warrant agreements and the warrants;
the terms of any rights to redeem or call the warrants;
any provisions for changes to or adjustments in the exercise price or number of securities issuable upon exercise of the warrants;
the dates on which the right to exercise the warrants will commence and expire;
the manner in which the warrant agreements and warrants may be modified;
a discussion of any material or special U.S. federal income tax considerations of holding or exercising the warrants;
the terms of the securities issuable upon exercise of the warrants; and
any other specific terms, preferences, rights or limitations of or restrictions on the warrants.

Before exercising their warrants, holders of warrants will not have any of the rights of holders of the securities purchasable upon such exercise, including:

in the case of warrants to purchase debt securities, the right to receive payments of principal of, or premium, if any, or interest on, the debt securities purchasable upon exercise or to enforce covenants in the applicable indenture; or
in the case of warrants to purchase common stock or preferred stock, the right to receive dividends, if any, or, payments upon our liquidation, dissolution or winding up or to exercise voting rights, if any.

Exercise of Warrants

Each warrant will entitle the holder to purchase the securities that we specify in the applicable prospectus supplement at the exercise price that we describe in the applicable prospectus supplement. The warrants may be exercised as set forth in the prospectus supplement relating to the warrants offered. Unless we otherwise specify in the applicable prospectus supplement, warrants may be exercised at any time up to the close of business on the expiration date set forth in the prospectus supplement relating to the warrants offered thereby. After the close of business on the expiration date, unexercised warrants will become void.

Upon receipt of payment and the warrant or warrant certificate, as applicable, properly completed and duly executed at the corporate trust office of the warrant agent, if any, or any other office, including ours, indicated in the prospectus supplement, we will, as soon as practicable, issue and deliver the securities purchasable upon such exercise. If less than all of the warrants (or the warrants represented by such warrant certificate) are exercised, a new warrant or a new warrant certificate, as applicable, will be freely tradableissued for the remaining warrants.

Governing Law

Unless we otherwise specify in the handsapplicable prospectus supplement, the warrants and any warrant agreements will be governed by and construed in accordance with the laws of the State of New York.

Enforceability of Rights by Holders of Warrants

Each warrant agent, if any, will act solely as our agent under the applicable warrant agreement and will not assume any obligation or relationship of agency or trust with any holder of any warrant. A single bank or trust company may act as warrant agent for more than one issue of warrants. A warrant agent will have no duty or responsibility in case of any default by us under the applicable warrant agreement or warrant, including any duty or responsibility to initiate any proceedings at law or otherwise, or to make any demand upon us. Any holder of a warrant may, without the consent of the related warrant agent or the holder of any other warrant, enforce by appropriate legal action its right to exercise, and receive the securities purchasable upon exercise of, its warrants.



LEGAL OWNERSHIP OF SECURITIES

We can issue securities in registered form or in the form of one or more global securities. We describe global securities in greater detail below. We refer to those persons who have securities registered in their own names on the books that we or any applicable trustee, depositary or warrant agent maintain for this purpose as the “holders” of those securities. These persons are the legal holders of the securities. We refer to those persons who, indirectly through others, own beneficial interests in securities that are not registered in their own names, as “indirect holders” of those securities. As we discuss below, indirect holders are not legal holders, and investors in securities issued in book-entry form or in street name will be indirect holders.

Book-Entry Holders

We may issue securities in book-entry form only, as we will specify in the applicable prospectus supplement. This means securities may be represented by one or more global securities registered in the name of a financial institution that holds them as depositary on behalf of other financial institutions that participate in the depositary’s book-entry system. These participating institutions, which are referred to as participants, in turn, hold beneficial interests in the securities on behalf of themselves or their customers.

Only the person in whose name a security is registered is recognized as the holder of that security. Securities issued in global form will be registered in the name of the depositary or its participants. Consequently, for securities issued in global form, we will recognize only the depositary as the holder of the securities, and we will make all payments on the securities to the depositary. The depositary passes along the payments it receives to its participants, which in turn pass the payments along to their customers who are the beneficial owners. The depositary and its participants do so under agreements they have made with one another or with their customers; they are not obligated to do so under the terms of the securities.

As a result, investors in a book-entry security will not own securities directly. Instead, they will own beneficial interests in a global security, through a bank, broker or other financial institution that participates in the depositary’s book-entry system or holds an interest through a participant. As long as the securities are issued in global form, investors will be indirect holders, and not holders, of the securities.

Street Name Holders

We may terminate a global security or issue securities in non-global form. In these cases, investors may choose to hold their securities in their own names or in “street name.” Securities held by an investor in street name would be registered in the name of a bank, broker or other financial institution that the investor chooses, and the investor would hold only a beneficial interest in those securities through an account he or she maintains at that institution.

For securities held in street name, we will recognize only the intermediary banks, brokers and other financial institutions in whose names the securities are registered as the holders of those securities, and we will make all payments on those securities to them. These institutions pass along the payments they receive to their customers who are the beneficial owners, but only because they agree to do so in their customer agreements or because they are legally required to do so. Investors who hold securities in street name will be indirect holders, not holders, of those securities.

Legal Holders

Our obligations, as well as the obligations of any applicable trustee and of any third parties employed by us or a trustee, run only to the legal holders of the securities. We do not have obligations to investors who hold beneficial interests in global securities, in street name or by any other indirect means. This will be the case whether an investor chooses to be an indirect holder of a security or has no choice because we are issuing the securities only in global form.



For example, once we make a payment or give a notice to the holder, we have no further responsibility for the payment or notice even if that holder is required, under agreements with depositary participants or customers or by law, to pass it along to the indirect holders but does not do so. Similarly, we may want to obtain the approval of the holders to amend an indenture, to relieve us of the consequences of a default or of our obligation to comply with a particular provision of the indenture or for other purposes. In such an event, we would seek approval only from the holders, and not the indirect holders, of the securities. Whether and how the holders contact the indirect holders is up to the holders.

Special Considerations For Indirect Holders

If you hold securities through a bank, broker or other financial institution, either in book-entry form or in street name, you should check with your own institution to find out:

the performance of third party service providers;
how it handles securities payments and notices;
whether it imposes fees or charges;
how it would handle a request for the holders’ consent, if ever required;
whether and how you can instruct it to send you securities registered in your own name so you can be a holder, if that is permitted in the future;
how it would exercise rights under the securities if there were a default or other event triggering the need for holders to act to protect their interests; and
if the securities are in book-entry form, how the depositary’s rules and procedures will affect these matters.

Global Securities

A global security is a security that represents one or any other number of individual securities held by a depositary. Generally, all securities represented by the same global securities will have the same terms.

Each security issued in book-entry form will be represented by a global security that we deposit with and register in the name of a financial institution or its nominee that we select. The financial institution that we select for this purpose is called the depositary. Unless we specify otherwise in the applicable prospectus supplement, DTC will be the depositary for all securities issued in book-entry form.

A global security may not be transferred to or registered in the name of anyone other than our affiliates.the depositary, its nominee or a successor depositary, unless special termination situations arise. We describe those situations below under the section titled “Special Situations When a Global Security Will Be Terminated” in this prospectus. As a result of these arrangements, the depositary, or its nominee, will be the sole registered owner and holder of all securities represented by a global security, and investors will be permitted to own only beneficial interests in a global security. Beneficial interests must be held by means of an account with a broker, bank or other financial institution that in turn has an account with the depositary or with another institution that does. Thus, an investor whose security is represented by a global security will not be a holder of the security, but only an indirect holder of a beneficial interest in the global security. If the prospectus supplement for a particular security indicates that the security will be issued in global form only, then the security will be represented by a global security at all times unless and until the global security is terminated. If termination occurs, we may issue the securities through another book-entry clearing system or decide that the securities may no longer be held through any book-entry clearing system.
VALIDITY OF COMMON STOCK
Special Considerations For Global Securities

The rights of an indirect holder relating to a global security will be governed by the account rules of the investor’s financial institution and of the depositary, as well as general laws relating to securities transfers. We do not recognize an indirect holder as a holder of securities and instead deal only with the depositary that holds the global security.



If securities are issued only in the form of a global security, an investor should be aware of the following:

an investor cannot cause the securities to be registered in his or her name, and cannot obtain non-global certificates for his or her interest in the securities, except in the special situations we describe below;
an investor will be an indirect holder and must look to his or her own bank or broker for payments on the securities and protection of his or her legal rights relating to the securities, as we describe above;
an investor may not be able to sell interests in the securities to some insurance companies and to other institutions that are required by law to own their securities in non-book-entry form;
an investor may not be able to pledge his or her interest in a global security in circumstances where certificates representing the securities must be delivered to the lender or other beneficiary of the pledge in order for the pledge to be effective;
the depositary’s policies, which may change from time to time, will govern payments, transfers, exchanges and other matters relating to an investor’s interest in a global security;
we and any applicable trustee have no responsibility for any aspect of the depositary’s actions or for its records of ownership interests in a global security, nor do we or any applicable trustee supervise the depositary in any way;
the depositary may, and we understand that DTC will, require that those who purchase and sell interests in a global security within its book-entry system use immediately available funds, and your broker or bank may require you to do so as well; and
financial institutions that participate in the depositary’s book-entry system, and through which an investor holds its interest in a global security, may also have their own policies affecting payments, notices and other matters relating to the securities.

There may be more than one financial intermediary in the chain of ownership for an investor. We do not monitor and are not responsible for the actions of any of those intermediaries.

Special Situations When a Global Security Will Be Terminated

In a few special situations described below, the global security will terminate and interests in it will be exchanged for physical certificates representing those interests. After that exchange, the choice of whether to hold securities directly or in street name will be up to the investor. Investors must consult their own banks or brokers to find out how to have their interests in securities transferred to their own name, so that they will be direct holders. We have described the rights of holders and street name investors above.

Unless we provide otherwise in the applicable prospectus supplement, the global security will terminate when the following special situations occur:

if the depositary notifies us that it is unwilling, unable or no longer qualified to continue as depositary for that global security and we do not appoint another institution to act as depositary within 90 days;
if we notify any applicable trustee that we wish to terminate that global security; or
if an event of default has occurred with regard to securities represented by that global security and has not been cured or waived.

The applicable prospectus supplement may also list additional situations for terminating a global security that would apply only to the particular series of securities covered by the applicable prospectus supplement. When a global security terminates, the depositary, and not we or any applicable trustee, is responsible for deciding the names of the institutions that will be the initial direct holders.



PLAN OF DISTRIBUTION

We may sell the securities from time to time pursuant to underwritten public offerings, direct sales to the public, “at the market” offerings, negotiated transactions, block trades or a combination of these methods. We may sell the securities to or through underwriters or dealers, through agents, or directly to one or more purchasers. We may distribute securities from time to time in one or more transactions:

at a fixed price or prices, which may be changed;
at market prices prevailing at the time of sale;
at prices related to such prevailing market prices; or
at negotiated prices.

A prospectus supplement or supplements (and any related free writing prospectus that we may authorize to be provided to you) will describe the terms of the offering of the securities, including, to the extent applicable:

the name or names of the underwriters, if any;
the purchase price of the securities or other consideration therefor, and the proceeds, if any, we will receive from the sale;
any over-allotment or other options under which underwriters may purchase additional securities from us;
any agency fees or underwriting discounts and other items constituting agents’ or underwriters’ compensation;
any public offering price;
any discounts or concessions allowed or reallowed or paid to dealers; and
any securities exchange or market on which the securities may be listed.

Only underwriters named in the prospectus supplement will be underwriters of the securities offered by the prospectus supplement.

If underwriters are used in the sale, they will acquire the securities for their own account and may resell the securities from time to time in one or more transactions at a fixed public offering price or at varying prices determined at the time of sale. The obligations of the underwriters to purchase the securities will be subject to the conditions set forth in the applicable underwriting agreement. We may offer the securities to the public through underwriting syndicates represented by managing underwriters or by underwriters without a syndicate. Subject to certain conditions, the underwriters will be obligated to purchase all of the securities offered by the prospectus supplement, other than securities covered by any over-allotment or other option. Any public offering price and any discounts or concessions allowed or reallowed or paid to dealers may change from time to time. We may use underwriters with whom we have a material relationship. We will describe in the prospectus supplement, naming the underwriter, the nature of any such relationship.

We may sell securities directly or through agents we designate from time to time. We will name any agent involved in the offering and sale of securities and we will describe any commissions we will pay the agent in the prospectus supplement. Unless the prospectus supplement states otherwise, our agent will act on a best-efforts basis for the period of its appointment.

We may authorize agents or underwriters to solicit offers by certain types of institutional investors to purchase securities from us at the public offering price set forth in the prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on a specified date in the future. We will describe the conditions to these contracts and the commissions we must pay for solicitation of these contracts in the prospectus supplement.

We may provide agents and underwriters with indemnification against civil liabilities, including liabilities under the Securities Act, or contribution with respect to payments that the agents or underwriters may make with respect to these liabilities. Agents and underwriters may engage in transactions with, or perform services for, us in the ordinary course of business.



All securities we may offer, other than common stock, will be new issues of securities with no established trading market. Any underwriters may make a market in these securities, but will not be obligated to do so and may discontinue any market making at any time without notice. We cannot guarantee the liquidity of the trading markets for any securities.

Any underwriter may engage in over-allotment, stabilizing transactions, short-covering transactions and penalty bids in accordance with Regulation M under the Exchange Act. Over-allotment involves sales in excess of the offering size, which create a short position. Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum price. Syndicate-covering or other short-covering transactions involve purchases of the securities, either through exercise of the over-allotment option or in the open market after the distribution is completed, to cover short positions. Penalty bids permit the underwriters to reclaim a selling concession from a dealer when the securities originally sold by the dealer are purchased in a stabilizing or covering transaction to cover short positions. Those activities may cause the price of the securities to be higher than it would otherwise be. If commenced, the underwriters may discontinue any of the activities at any time.

Any underwriters or agents that are qualified market makers on The Nasdaq Global Market may engage in passive market making transactions in the common stock on The Nasdaq Global Market in accordance with Regulation M under the Exchange Act, during the business day prior to the pricing of the offering, before the commencement of offers or sales of the common stock. Passive market makers must comply with applicable volume and price limitations and must be identified as passive market makers. In general, a passive market maker must display its bid at a price not in excess of the highest independent bid for such security; if all independent bids are lowered below the passive market maker’s bid, however, the passive market maker’s bid must then be lowered when certain purchase limits are exceeded. Passive market making may stabilize the market price of the securities at a level above that which might otherwise prevail in the open market and, if commenced, may be discontinued at any time.

In compliance with guidelines of the Financial Industry Regulatory Authority, or FINRA, the maximum consideration or discount to be received by any FINRA member or independent broker dealer may not exceed 8% of the aggregate amount of the securities offered pursuant to this prospectus and any applicable prospectus supplement.

LEGAL MATTERS

Unless otherwise indicated in the applicable prospectus supplement, Cooley LLP will pass upon the validity of the common stock beingsecurities offered hereby has been passed upon for us by Cooley LLP, Palo Alto, California.this prospectus and any supplement thereto.

EXPERTS

The consolidated financial statements incorporated in this prospectusProspectus by reference from our Annual Report on Form 10-K for10 K, and the year ended December 31, 2016,effectiveness of Enphase Energy Inc.’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report, which isreports incorporated herein by reference (which report expresses(which reports (1) express an unqualified opinion on the consolidated financial statements and includes an explanatory paragraph relating to substantial doubt about our ability to continue asthe Company’s adoption of a going concern)new accounting standard and (2) express an unqualified opinion on the effectiveness of internal control over financial reporting). Such consolidated financial statements have been so incorporated in reliance upon the reportreports of such firm given upon their authority as experts in accounting and auditing.

WHERE YOU CAN FIND MORE INFORMATION
We
This prospectus is part of the registration statement on Form S-3 we filed with the Securities and Exchange Commission, or SEC, under the Securities Act and does not contain all the information set forth in the registration statement. Whenever a reference is made in this prospectus to any of our contracts, agreements or other documents, the reference may not be complete and you should refer to the exhibits that are a part of the registration statement or the exhibits to the reports or other documents incorporated by reference into this prospectus for a copy of such contract, agreement or other document. Because we are subject to the information and reporting company andrequirements of the Exchange Act, we file annual, quarterly and current reports, proxy statements and other information with the SEC. We have filed with theOur SEC a registration statement on Form S-3 under the Securities Act

with respectfilings are available to the resale ofpublic over the common stock the selling stockholders are offering under this prospectus. This prospectus does not contain all of the information set forth in the registration statement and the exhibits to the registration statement. For further information with respect to us and the common stock offered by the selling stockholders under this prospectus, we refer you to the registration statement and the exhibits filed as a part of the registration statement. You may read and copy the registration statement, as well as our reports, proxy statements and other information,Internet at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for more information about the operation of the public reference room. The SEC also maintains an Internet site that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC, including Enphase. The SEC’s Internet site can be found at www.sec.gov. We maintain a website at www.enphase.com. Information found on, or accessible through, our website is not a part of, and is not incorporated into, this prospectus, and you should not consider it part of this prospectus.http://www.sec.gov.



INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to incorporate“incorporate by reference thereference” information from other documents that we file with it, which means that we can disclose important information to you by referring you to another document that we have filed separately with the SEC. You should read thethose documents. The information incorporated by reference because it is an importantconsidered to be part of this prospectus. Information in this prospectus supersedes information incorporated by reference that we filed with the SEC prior to the date of this prospectus, while information that we file later with the SEC will automatically update and supersede the information in this prospectus. We incorporate by reference into this prospectus and the registration statement of which this prospectus is a part the information or documents listed below that we have filed with the SEC (Commission File No. 001-35480):

our Annual Report on Form 10-K for the fiscal year ended December 31, 2016,2018, filed with the SEC on March 16, 2017;15, 2019;
the information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended December 31, 2018 from our Definitive Proxy Statement on Schedule 14A, as amended, filed with the SEC on April 4, 2019;
our Current ReportsReport on Form 8-K which were filed with the SEC on JanuaryFebruary 6, 2017, January 10, 2017, January 30, 2017,2019; and February 16, 2017;
the description of our common stock contained in our registration statement on Form 8-A filed with the SEC on March 28, 2012, including any further amendments thereto or reports2012.

All filings filed forby us pursuant to the purposesExchange Act after the date of updatingthe initial filing of the registration statement of which this description.prospectus is a part and prior to effectiveness of the registration statement shall be deemed to be incorporated by reference into this prospectus.

We also incorporate by reference any future filings (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits filed on such form that are related to such items unless such Form 8-K expressly provides to the contrary) made with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including those made after the date of the initial filing of the registration statement of which this prospectus is a part and prior to effectiveness of such registration statement, until we file a post-effective amendment that indicates the termination of the offering of the common stocksecurities made by this prospectus, and will become a part of this prospectus from the date that such documents are filed with the SEC. Information in such future filings updates and supplements the information provided in this prospectus. Any statements in any such future filings will automatically be deemed to modify and supersede any information in any document we previously filed with the SEC that is incorporated or deemed to be incorporated herein by reference to the extent that statements in the later filed document modify or replace such earlier statements.
We will furnish without charge to each person, including any beneficial owner, to whom a prospectus is delivered, upon written or oral request, a copy of any or all of the documents incorporated by reference into this prospectus but not delivered with the prospectus, including exhibits that are specifically incorporated by reference into such documents.
You can request a copy of these filings, at no cost, by writing or telephoning us at the following address or telephone number:

Enphase Energy, Inc.

47281 Bayside Pkwy
1420 N. McDowell Blvd
Petaluma,Fremont, CA 9495494538
(707) 774-7000
Attn: Legal Department



PART II
INFORMATION NOT REQUIRED IN THE PROSPECTUS


Item 14. Other Expenses of Issuance and Distribution

The following table sets forth an estimate of the estimated costsfees and expenses, other than the underwriting discounts and commissions, payable by the registrantus in connection with the common stockissuance and distribution of the securities being registered. The selling stockholders will not bear any portion of such expenses. All the amounts shown are estimates, except for the SEC registration fee.

 Amount Amount
SEC registration fee $1,890
 $12,120
Nasdaq Global Market listing fee *
Accounting fees and expenses 60,000
 *
Legal fees and expenses 50,000
 *
Transfer agent and registrar fees and expenses *
Printing and miscellaneous fees and expenses 110
 *
   
Total $112,000
 $*
   

*These fees are calculated based on the securities offered and the number of issuances and accordingly cannot be estimated at this time. The applicable prospectus supplement will set forth the estimated amount of expenses of any offering of securities.

Item 15. Indemnification of Directors and Officers

We are incorporated under the laws of the State of Delaware. Section 145 of the Delaware General Corporation Law authorizes a court to award, or a corporation’s board of directors to grant, indemnity to directors and officers under certain circumstances and subject to certain limitations. The registrant’sterms of Section 145 of the Delaware General Corporation Law are sufficiently broad to permit indemnification under certain circumstances for liabilities, including reimbursement of expenses incurred, arising under the Securities Act.

As permitted by Section 102(b)(7) of the Delaware General Corporation Law, our certificate of incorporation contains provisions permitted under Delaware law relatingincludes a provision that eliminates, to the fullest extent permitted by law, the personal liability of directors. These provisions eliminate a director’s personal liabilitydirector for monetary damages resulting from a breach of his fiduciary duty except in circumstances involving wrongful acts, such as:as a director. As permitted by the Delaware General Corporation Law, our bylaws provide that:
any breach of the director’s duty of loyalty
we are required to indemnify our directors and officers to the registrant or its stockholders;fullest extent permitted by the Delaware General Corporation Law;
any act or omission notwe may indemnify our other employees and agents as provided in good faith or that involves intentional misconduct orindemnification contracts entered into between us and our employees and agents;
we are required to advance expenses, as incurred, to our directors and officers in connection with a knowing violation oflegal proceeding to the law;fullest extent permitted by the Delaware General Corporation Law; and
any act related to unlawful stock repurchases, redemptions or other distribution or payments of dividends; or
any transaction from which the director derived an improper personal benefit.
     These provisions do not limit or eliminate the registrant’s rights or any stockholder’s rights to seek non-monetary relief, such as an injunction or rescission,conferred in the eventbylaws are not exclusive.

Our policy is to enter into separate indemnification agreements with each of a breach of a director’s fiduciary duty. These provisions will not alter a director’s liability under federal securities laws.
     As permittedour directors and officers that provide the maximum indemnity allowed to directors and executive officers by Section 145 of the Delaware General Corporation Law the registrant’s bylaws require the registrant to indemnify its directors and executive officers to the fullest extent not prohibited by the Delaware law. The registrant may expand the extent of such indemnification by individual contracts with the registrant’s directors and executive officers. Further, the registrant may decline to indemnify any director or executive officer in connection with any proceeding initiated by such person or any proceeding by such person against the registrant or its directors, officers, employees or other agents, unless such indemnification is expressly required to be made by law or the proceeding was authorized by the registrant’s board of directors.
     The registrant has entered into indemnity agreements with each of its current directors and its executive officers to give such directors and officers additional contractual assurances regarding the scope of the indemnification set forth in the registrant’s certificate of incorporation and bylaws and toalso provide for certain additional procedural protections. At present, there is no pending litigation or proceeding involving any of the registrant’sWe currently carry liability insurance for our directors officers or employees for which indemnification is sought, nor is the registrant aware of any threatened litigation that may result in claims for indemnification.and officers.


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These indemnification provisions and the indemnification agreements entered into between us and our officers and directors may be sufficiently broad to permit indemnification of our officers and directors for liabilities (including reimbursement of expenses incurred) arising under the Securities Act.

     The registrant has the power to indemnify its other officers, employees and other agents, as permitted by Delaware law, but the registrant is not required to do so.
     The registrant has a directors’ and officers’ insurance and registrant reimbursement policy. The policy insures the registrant’s directors and officers against unindemnified losses arising from certain wrongful acts in their capacities as directors and officers and reimburses the registrant for those losses for which the registrant has lawfully indemnified the directors and officers. The policy contains various exclusions, none of which apply to any offerings pursuant to this registration statement.
The registration rightsunderwriting agreement that the registrant enteredRegistrant may enter into with(Exhibit 1.1) may provide for indemnification by any underwriters of the selling stockholders identified inRegistrant, its directors, its officers who sign the prospectus included in this registration statement provides for cross-indemnification in connection with registration ofand the registrant’s common stock on behalf of such selling stockholders, includingcontrolling persons for some liabilities, including liabilities arising under the Securities Act.

Item 16. Exhibits
The list of exhibits is set forth under “Index to Exhibits” at the end of this registration statement and is incorporated herein by reference.
    Incorporation By Reference Filed
Exhibit Description Form SEC File No. Exhibit Filing Date Herewith
1.1* Form of Underwriting Agreement          
3.1  8-K 001-35480 3.1 4/6/2012  
3.2  10-Q 001-35480 3.1 8/9/2017  
3.3  10-Q 001-35480 2.1 8/6/2018  
3.3  S-1/A 333-174925 3.5 3/12/2012  
4.1  S-1 333-174925 4.1 3/12/2012  
4.2* Specimen Preferred Stock Certificate and Form of Certificate of Designation of Preferred Stock          
4.3          
4.4* Form of Debt Securities          
4.5          
4.6          
4.7          
5.1          
23.1          
23.2          
24.1          
25.1** Statement of Eligibility of Trustee under the Debt Indenture          
*To be filed by amendment or as an exhibit to a Current Report on Form 8-K and incorporated herein by reference, if applicable.
**To be filed separately under electronic form type 305B2, if applicable.

Item 17. Undertakings

The undersigned registrant hereby undertakes:

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

(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 the 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 Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

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

provided, however, that paragraphs (1)(i), (1)(ii) and (1)(iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or 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 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 securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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

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


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

(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.
(5) That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser, if the registrant is subject to Rule 430C, each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness. 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 first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.
(6)(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 such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;



(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

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

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

(7) That, for purposes of determining any liability under the Securities Act of 1933:

(i) the information omitted from the form of prospectus filed as part of the registration statement in reliance upon Rule 430A and contained in the form of prospectus filed by the registrant pursuant to Rule 424(b)(l) or (4) or 497(h) under the Securities Act of 1933 shall be deemed to be a part of the registration statement as of the time it was declared effective; and

(ii) each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(8) To file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the Commission under Section 305(b)(2) of the Trust Indenture Act.

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


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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, 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 Petaluma,Fremont, State of California, on March 22, 2017.April 3, 2019.

ENPHASE ENERGY, INC.
By:    /s/ PAUL B. NAHI         
Paul B. Nahi
By:/s/ ERIC BRANDERIZ
Eric Branderiz
Vice President and Chief Financial Officer
President and Chief Executive Officer
POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Paul B. NahiBadrinarayanan Kothandaraman and Humberto Garcia,Eric Branderiz, and each of them, as his or her true and lawful attorneys-in-fact and agents, each with the full power of substitution, for him or her and in his or her name, place or stead, in any and all capacities, to sign any and all amendments to this Registration Statement (including post-effective amendments), and to sign any registration statement for the same offering covered by this Registration Statement that is to be effective upon filing pursuant to Rule 462(b) promulgated under the Securities Act, and all post-effective amendments thereto, and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, 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 he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their his or herhis substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statementregistration statement has been signed below by the following persons in the capacities and on the dates indicated:indicated.
SignaturesSignature Title Date
/s/  PAUL B. NAHI  
Paul B. Nahi/s/ BADRINARAYANAN KOTHANDARAMAN 
President and Chief Executive Officer and Director

(Principal Executive Officer)
 March 22, 2017April 3, 2019
/s/  HUMBERTO GARCIABadrinarayanan Kothandaraman  
Humberto Garcia 
/s/ ERIC BRANDERIZVice President and Chief Financial Officer

(Principal Financial and Accounting Officer)
 March 22, 2017April 3, 2019
Eric Branderiz
/s/ MANDY YANGVice President, Chief Accounting Officer and Treasurer
(Principal Accounting Officer)
April 3, 2019
Mandy Yang
/s/ STEVEN J. GOMODirectorApril 3, 2019
Steven J. Gomo
/s/ BENJAMIN KORTLANGDirectorApril 3, 2019
Benjamin Kortlang
/s/ RICHARD MORADirectorApril 3, 2019
Richard Mora
/s/ THURMAN JOHN RODGERS DirectorApril 3, 2019
Thurman John Rodgers DirectorMarch 22, 2017
/s/  STEVEN J. GOMO  
Steven J. GomoDirectorMarch 22, 2017
/s/   BENJAMIN KORTLANG
DirectorMarch 22, 2017
/s/   RICHARD S. MORA
Richard S. MoraDirectorMarch 22, 2017
/s/   JOHN H. WEBER
John H. WeberDirectorMarch 22, 2017


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EXHIBIT INDEX
Exhibit
Number
Description of Document
3.1
Amended and Restated Certificate of Incorporation of Enphase Energy, Inc. (1)
3.2
Amended and Restated Bylaws of Enphase Energy, Inc.(2)
4.1Reference is made to Exhibits 3.1 and 3.2.
4.2
Specimen Common Stock Certificate of Enphase Energy, Inc.(3)
4.3
Securities Purchase Agreement, dated January 9, 2017, by and between Enphase Energy, Inc. and the investors named therein. (4)
4.4
Form of Warrant.(5)
5.1+Opinion of Cooley LLP.
23.1+Consent of Independent Registered Public Accounting Firm.
23.2+Consent of Cooley LLP (included in Exhibit 5.1).
24.1+Power of Attorney is contained on the signature pages.
_________________
+Filed herewith.
(1)Previously filed as Exhibit 3.1 to the Current Report on Form 8-K (File No. 001-35480), filed with the Securities and Exchange Commission on April 6, 2012, and incorporated by reference herein.
(2)Previously filed as Exhibit 3.5 to Amendment No. 7 to the Registration Statement on Form S-1/A (File No. 333-174925), filed with the Securities and Exchange Commission on March 12, 2012, and incorporated by reference herein.
(3)Previously filed as the like-numbered exhibit to the Registration Statement on Form S-1/A (File No. 333-174925), and incorporated herein by reference.
(4)Previously filed as Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-35480), filed with the Securities and Exchange Commission on January 10, 2017, and incorporated by reference herein.
(5)Previously filed as Exhibit 10.39 to the Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (File No. 001-35480), filed with the Securities and Exchange Commission on March 16, 2017, and incorporated by reference herein.


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