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As filed with the Securities and Exchange Commission on April 3, 2015

Registration No. 333-            

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

NeoPhotonics Corporation

(Exact name of registrant as specified in its charter)

2911 Zanker Road

San Jose, California 95134

(408) 232-9200

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

Timothy S. Jenks

Chief Executive Officer

NeoPhotonics Corporation

2911 Zanker Road

San Jose, California 95134

(408) 232-9200

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

Copies to:

John H. Sellers

Brett D. White

Cooley LLP

3175 Hanover Street

Palo Alto, California 94304

(650) 843-5000Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this registration statement.

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, 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 post-effective amendment filed pursuant to Rule 462(d) 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.  ¨

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

CALCULATION OF REGISTRATION FEE

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

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The information in this preliminary prospectus is not complete and may be changed. These securities may not be sold by the selling stockholder until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell nor are we seeking an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED APRIL 3, 2015

PROSPECTUS

4,972,905 Shares

NeoPhotonics Corporation

Common Stock

This prospectus relates to the sale or other disposition from time to time of up to 4,972,905 shares of our common stock to be sold by the selling stockholder named in this prospectus. The 4,972,905 shares of common stock covered by this prospectus were sold by us in a private placement of these securities. We are not selling any common stock under this prospectus and will not receive any of the proceeds from the sale or other disposition of shares by the selling stockholder.

The selling stockholder may sell or otherwise dispose of the shares of common stock covered by this prospectus in a number of different ways and at varying prices. We provide more information about how the selling stockholder may sell or otherwise dispose of its shares of common stock in the section entitled “Plan of Distribution” on page 8. Discounts, concessions, commissions and similar selling expenses attributable to the sale of shares of common stock covered by this prospectus will be borne by the selling stockholder. We will pay all expenses (other than discounts, concessions, commissions and similar selling expenses) relating to the registration of the shares with the Securities and Exchange Commission.

Our common stock is listed on the New York Stock Exchange under the symbol “NPTN.” On April 2, 2015, the last reported sale price for our common stock on the New York Stock Exchange was $6.07 per share.

Investing in our common stock involves risks. See “Risk Factors” beginning on page 3 of this prospectus.

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You should rely only on the information contained in this prospectus, any supplement to this prospectus or in any free writing prospectus filed with the Securities and Exchange Commission. Neither we nor the selling stockholder have authorized anyone to provide you with additional information or information different from that contained in this prospectus filed with the Securities and Exchange Commission. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. The selling stockholder is offering to sell, and seeking offers to buy, our common stock only in jurisdictions where offers and sales are permitted. The information contained in this prospectus is accurate only as of the date of this prospectus, regardless of the time of delivery of this prospectus or any sale of shares of our common stock. Our business, financial condition, results of operations and prospects may have changed since that date.

For investors outside the United States: Neither we nor the selling stockholder have done anything that would permit this offering or possession or distribution of this prospectus in any jurisdiction where action for that purpose is required, other than in the United States. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering of the shares of common stock and the distribution of this prospectus outside the United States.

To the extent there is a conflict between the information contained in this prospectus, on the one hand, and the information contained in any document incorporated by reference filed with the Securities and Exchange Commission (SEC) before the date of this prospectus, on the other hand, you should rely on the information in this prospectus. If any statement in a document incorporated by reference is inconsistent with a statement in another document incorporated by reference having a later date, the statement in the document having the later date modifies or supersedes the earlier statement.

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CONVENTIONS THAT APPLY IN THIS PROSPECTUS

Unless otherwise indicated, references in this prospectus to:

Unless the context indicates otherwise, we use the terms “NeoPhotonics,” “we,” “us,” “our” and “the Company” in this prospectus to refer to NeoPhotonics Corporation and, where appropriate, its subsidiaries.

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RISK FACTORS

Investing in our common stock involves a high degree of risk. You should consider carefully the risks and uncertainties described in the section entitled “Risk Factors” contained in our Annual Report on Form 10-K for the year ended December 31, 2014, as filed with the Securities and Exchange Commission, or SEC, on March 16, 2015, which description is incorporated in this prospectus by reference in its entirety, as well as in any prospectus supplement hereto. These risks and uncertainties are not the only risks and uncertainties we face. Additional risks and uncertainties not currently known to us, or that we currently view as immaterial, may also impair our business. If any of the risks or uncertainties described in our SEC filings or any additional risks and uncertainties actually occur, our business, financial condition, results of operations and cash flow could be materially and adversely affected. In that case, the trading price of our common stock could decline and you might lose all or part of your investment.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus, including the information that we incorporate by reference, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve substantial risks and uncertainties. All statements other than statements of historical facts contained in this prospectus, including statements regarding our future financial condition, business strategy and plans and objectives of management for future operations, are forward-looking statements. Forward-looking statements include statements that are not historical facts and can be identified by terms such as “anticipates,” “believes,” “could,” “seeks,” “estimates,” “expects,” “intends,” “may,” “plans,” “potential,” “predicts, “projects,” “should,” “will,” “would” or similar expressions and the negatives of those terms.

Forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Also, forward-looking statements represent our management’s beliefs and assumptions only as of the date of this prospectus. You should read this prospectus, including the information that we incorporate by reference, and the documents that we have filed as exhibits to the registration statement, of which this prospectus is a part, completely and with the understanding that our actual future results may be materially different from what we expect.

Important factors that could cause actual results to differ materially from our expectations are disclosed under “Risk Factors” and elsewhere in this prospectus and in the information that we incorporate by reference, including, without limitation, in conjunction with the forward-looking statements appearing elsewhere in this prospectus and in the information that we incorporate by reference.

Except as required by law, we assume no obligation to update these forward-looking statements, 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.

USE OF PROCEEDS

All shares offered in this prospectus are being sold by the selling stockholder. We will not receive any proceeds from the sale of shares by the selling stockholder.

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PRICE RANGE OF COMMON STOCK

Market for Common Equity

Our common stock began trading on the New York Stock Exchange on February 2, 2011, under the symbol “NPTN.” The table below sets forth the high and low intraday sales prices for our common stock for the periods indicated, as reported by the New York Stock Exchange:

The reported last sale price of our common stock on the New York Stock Exchange on April 2, 2015, was $6.07 per share. As of February  28, 2015, there were approximately 108 stockholders of record of our common stock.

DIVIDEND POLICY

To date, no dividends have been declared, accrued, paid or otherwise earned on our common stock or preferred stock and we do not expect to pay dividends on our common stock or preferred stock in the foreseeable future. Instead, we anticipate that all of our earnings in the foreseeable future will be used for the operation and growth of our business. Any future determination to pay dividends on our common stock or preferred stock would be subject to the discretion of our board of directors and would depend upon various factors, including our results of operations, financial condition, liquidity requirements, restrictions that may be imposed by applicable law and our contracts and other factors deemed relevant by our board of directors. In addition, our revolving credit and term loan agreement with Comerica Bank limits our ability to pay dividends.

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SELLING STOCKHOLDER

The following table sets forth information regarding the number of shares of our common stock as of February 28, 2015, held for the account of, and the numbers of shares being sold, by the selling stockholder.

Private placement and related agreements with Rusnano

In April 2012, we entered into a share purchase agreement with Rusnano, pursuant to which we sold and issued an aggregate of 4,972,905 shares of common stock at a purchase price of $8.00 per share for aggregate gross proceeds of approximately $39,783,240. Immediately after the closing of such transaction, Rusnano owned approximately 16.7% of our issued and outstanding common stock.

In connection with the foregoing transaction, we entered into a rights agreement with Rusnano pursuant to which we agreed to, among other matters: (i) file one or more registration statements covering the resale of shares of our common stock held by Rusnano prior to the expiration of a lock-up agreement between us and Rusnano, (ii) grant piggyback registration rights to Rusnano for shares of our common stock held by Rusnano following the expiration of the lock-up agreement in the event we propose to register shares in an underwritten offering, (iii) grant Rusnano the right to designate one nominee for our board of directors, (iv) grant Rusnano a right of first offer to purchase its pro rata share of all equity securities (subject to an exception for shares sold in a public offering and other customary exceptions set forth therein) that we may propose to sell and issue after the date of the rights agreement, and (v) make a $30,000,000 investment towards our Russian operations (the “Investment Commitment”).

We also entered into a lock-up agreement with Rusnano, dated April 27, 2012, in connection with the foregoing transaction. The lock-up agreement provided that Rusnano would not, for a period of two years from the closing of the transaction, directly or indirectly, sell or otherwise dispose of any shares of our common stock or securities convertible into or exchangeable for our common stock.

Dmitry Akhanov, a member of our board of directors since July 2013, is the President and Chief Executive Officer of Rusnano USA, Inc., a U.S. subsidiary of Rusnano. Prior to Mr. Akhanov’s appointment in July 2013, Sergey Polikarpov, a Managing Director of Rusnano, served as a member of our board of directors beginning in April 2012.

We are currently required to satisfy the Investment Commitment by June 30, 2015. We intend to meet the Investment Commitment by June 30, 2015. If we fail to meet the Investment Commitment by the deadline, we may be required to pay a $5.0 million penalty as the sole and exclusive remedy for damages and monetary relief available to Rusnano for failure to meet the Investment Commitment.

Separately, on December 18, 2014, we entered into a Commitment to file a Resale Registration Statement and Related Waiver of Registration Rights, whereby Rusnano waived its registration rights in connection with an intended public offering of our common stock, and we committed to file with the SEC a registration statement of

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which this prospectus is a part covering the resale of all shares of the common stock held by Rusnano no later than April 15, 2015. Rusnano also waived its demand registration rights under the original rights agreement and agreed to enter into a lock up agreement with us whereby it will agree not to sell any shares of our common stock, or engage in certain other transactions relating to our securities, for a period of 60 days from the filing date of the registration statement of which this prospectus is a part. Rusnano signed such lock up agreement with us on April 2, 2015.

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PLAN OF DISTRIBUTION

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

The selling stockholder has entered into a lock up agreement with us whereby it has agreed not to sell any shares of our common stock, or engage in certain other transactions relating to our securities, for a period of 60 days from the filing date of the registration statement of which this prospectus is a part.

The selling stockholder and any of its pledgees, assignees and successors-in-interest may, from time to time, sell any or all of their shares covered hereby on The New York Stock Exchange 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 negotiated prices. The selling stockholder may use any one or more of the following methods when selling shares:

To the extent required by law, this prospectus may be amended or supplemented from time to time to describe a specific plan of distribution, which amended or supplemented prospectus may include the following information to the extent required by law:

The selling stockholder may also sell common stock under Rule 144 under the Securities Act of 1933, as amended, or the Securities Act, if available, rather than under this prospectus.

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If underwriters are used in the sale, the shares will be acquired by the underwriters for their own account and may be resold from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. In connection with any such underwritten sale of shares, underwriters may receive compensation from the selling stockholder, for whom they may act as agents, in the form of discounts, concessions or commissions. If the selling stockholder uses an underwriter or underwriters to effectuate the sale of shares, we and/or they will execute an underwriting agreement with those underwriters at the time of sale of those shares. To the extent required by law, the names of the underwriters will be set forth in a supplement to this prospectus or, if appropriate, a post-effective amendment to the registration statement that includes this prospectus, used by the underwriters to sell those securities. The obligations of the underwriters to purchase those shares will be subject to certain conditions precedent, and unless otherwise specified in a prospectus or a prospectus supplement, the underwriters will be obligated to purchase all the shares offered by such prospectus or prospectus supplement if any of such shares are purchased. Any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers may be changed from time to time.

Broker-dealers engaged by the selling stockholder may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling stockholder (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.

From time to time, the selling stockholder may pledge, hypothecate or grant a security interest in some or all of the common stock owned by it. The pledgees, secured parties, or persons to whom the shares have been hypothecated will, upon foreclosure, be deemed to be a selling stockholder. The number of a selling stockholder’s shares offered under this prospectus will decrease as and when it takes such actions. The plan of distribution for that selling stockholder’s shares will otherwise remain unchanged.

In connection with the sale of the shares of common stock or interests therein, the selling stockholder may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the common stock in the course of hedging the positions they assume. The selling stockholder may also sell the shares 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 common stock to broker-dealers that in turn may sell these securities. The selling stockholder 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 offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction). Notwithstanding the foregoing, the selling stockholder has been advised that it may not use shares registered on this registration statement to cover short sales of our common stock made prior to the date the registration statement, of which this prospectus forms a part, has been declared effective by the SEC.

The selling stockholder may also sell common stock from time to time through agents. We will name any agent involved in the offer or sale of such shares and will list commissions payable to these agents in a prospectus supplement, if required. These agents will be acting on a best efforts basis to solicit purchases for the period of their appointment, unless we state otherwise in any required prospectus supplement.

The selling stockholder may sell shares directly to purchasers. In this case, they may not engage underwriters or agents in the offer and sale of such shares.

A selling stockholder which is an entity may elect to make a pro rata in-kind distribution of the common stock to its members, partners or shareholders. In such event we may file a prospectus supplement to the extent required by law in order to permit the distributees to use the prospectus to resell the shares acquired in the distribution. A selling stockholder which is an individual may make gifts of shares covered hereby. Such donees may use the prospectus to resell the shares or, if required by law, we may file a prospectus supplement naming such donees.

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The selling stockholder and any broker-dealers or agents that are involved in selling the common stock may be deemed to be “underwriters” within the meaning of the Securities Act in connection with such sales. In such event, any discounts, commissions or concessions received by such broker-dealers or agents and any profit on the resale of the shares purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act. If the selling stockholder is an “underwriter” within the meaning of Section 2(11) of the Securities Act, it 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 Securities Exchange Act of 1934, as amended, or the Exchange Act. The selling stockholder has informed us that it is not a registered broker-dealer and does not have any written or oral agreement or understanding, directly or indirectly, with any person to distribute the shares. In no event shall any underwriter or 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 shares. We have agreed to indemnify the selling stockholder against certain losses, claims, damages and liabilities, including liabilities under the Securities Act, and the selling stockholder may be entitled to contribution. We may be indemnified by the selling stockholder 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 stockholder specifically for use in this prospectus, or we may be entitled to contribution.

The selling stockholder will be subject to the prospectus delivery requirements of the Securities Act including Rule 172 thereunder unless an exemption therefrom is available.

We agreed to use our commercially reasonable efforts keep the registration statement of which this prospectus is a part effective until the earlier of (i) the date on which the shares may be resold by the selling stockholder without registration and without regard to any volume restrictions by reason of Rule 144 under the Securities Act or any other rule of similar effect, (ii) all of the shares have been sold pursuant to this prospectus or Rule 144 under the Securities Act or any other rule of similar effect or (iii) two years from the date the registration statement of which this prospectus is a part was declared effective by the SEC, provided that such two-year period is subject to extension for the number of days that the effectiveness of the registration statement of which this prospectus is a part is suspended. The resale shares will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, the resale of shares covered hereby may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

Under applicable rules and regulations under the Exchange Act, any person engaged in the distribution of the resale shares may not simultaneously engage in market making activities with respect to the common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the selling stockholder will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of common stock by the selling stockholder or any other person. We will make copies of this prospectus available to the selling stockholder and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act).

There can be no assurance that the selling stockholder will sell any or all of the common stock registered pursuant to the registration statement, of which this prospectus forms a part. In addition, there can be no assurances that the selling stockholder will not transfer, devise or gift the shares by other means not described in this prospectus.

Once sold under the registration statement, of which this prospectus forms a part, the shares will be freely tradable in the hands of persons other than our affiliates.

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LEGAL MATTERS

The validity of the shares of common stock being offered by this prospectus will be passed upon for us by Cooley LLP, Palo Alto, California.

EXPERTS

The consolidated financial statements as of December 31, 2014 and 2013, and for each of the two years in the period ended December 31, 2014, incorporated by reference in this Prospectus, and the effectiveness of NeoPhotonics Corporation’s internal control over financial reporting, have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports, which are incorporated by reference herein. Such consolidated financial statements have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

The consolidated financial statements for the year ended December 31, 2012, incorporated in this prospectus by reference to NeoPhotonics Corporation’s Annual Report on Form 10-K for the year ended December 31, 2014, have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

WHERE YOU CAN FIND MORE INFORMATION

This prospectus is part of the registration statement on Form S-1 we filed with the 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 requirements of the Securities Exchange Act of 1934, as amended, we file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the Internet at the SEC’s website at http://www.sec.gov. You may also read and copy any document we file 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 further information on the operation of the Public Reference Room. In addition, any person to whom this prospectus is delivered may request copies of this prospectus and any related amendments or supplements or documents incorporated by reference, without charge, by written or telephonic request directed to Clyde R. Wallin, Senior Vice President and Chief Financial Officer, NeoPhotonics Corporation, 2911 Zanker Road, San Jose, California 95134; telephone: (408) 232-9200; E-mail: ray.wallin@neophotonics.com.

We maintain a website at www.neophotonics.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.

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” information from other documents that we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered 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.

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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. 001-35061):

We will furnish without charge to you, on written or oral request, a copy of any or all of the documents incorporated by reference in this prospectus, including exhibits to these documents. You should direct any requests for documents to Clyde R. Wallin, Senior Vice President and Chief Financial Officer, NeoPhotonics Corporation, 2911 Zanker Road, San Jose, California 95134; telephone: (408) 232-9200; E-mail: ray.wallin@neophotonics.com.

You also may access these filings on our website at www.neophotonics.com. We do not incorporate the information on our website into this prospectus or any supplement to this prospectus and you should not consider any information on, or that can be accessed through, our website as part of this prospectus or any supplement to this prospectus (other than those filings with the SEC that we specifically incorporate by reference into this prospectus or any supplement to this prospectus).

Any statement contained in a document incorporated or deemed to be incorporated by reference in this prospectus will be deemed modified, superseded or replaced for purposes of this prospectus to the extent that a statement contained in this prospectus modifies, supersedes or replaces such statement.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution.

The following table sets forth the costs and expenses, other than underwriting discounts and commissions, to be paid by the registrant in connection with the sale of the shares of common stock being registered hereby. All amounts are estimates except for the SEC registration fee.

Discounts, concessions, commissions and similar selling expenses attributable to the sale of shares of common stock covered by this prospectus will be borne by the selling stockholder. We will pay all expenses (other than discounts, concessions, commissions and similar selling expenses) relating to the registration of the shares with the Securities and Exchange Commission, as estimated in the table above.

Item 14. Indemnification of Directors and Officers.

We are incorporated under the General Corporation Law of the State of Delaware (the “Delaware General Corporation Law”). 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 terms 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 the Delaware General Corporation Law, our certificate of incorporation includes a provision that eliminates, to the fullest extent permitted by law, the personal liability of a director for monetary damages resulting from breach of his fiduciary duty as a director.

As permitted by the Delaware General Corporation Law, our bylaws provide that:

Our policy is to enter into separate indemnification agreements with each of our directors and officers that provide the maximum indemnity allowed to directors and executive officers by Section 145 of the Delaware General Corporation Law and also provide for certain additional procedural protections. We currently carry liability insurance for our directors and officers. At present, there is no pending litigation or proceeding involving one of our directors or officers regarding which indemnification is sought, nor are we aware of any threatened litigation that may result in claims for indemnification.

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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 Underwriting Agreement filed as Exhibit 1.1 to this Registration Statement provides for indemnification by the underwriters of us and our directors and officers for certain liabilities under the Securities Act, or otherwise.

Item 15. Recent Sales of Unregistered Securities.

On April 27, 2012, the registrant entered into a share purchase agreement (the “Purchase Agreement”) with Open Joint Stock Company “RUSNANO”, an entity organized under the laws of the Russian Federation (“Rusnano”), pursuant to which the registrant agreed to sell and issue an aggregate of 4,972,905 shares of common stock at a purchase price of $8.00 per share for aggregate gross proceeds of approximately $39.8 million (the “Private Placement”). The closing of the Private Placement occurred on April 27, 2012. Immediately after the closing of the Private Placement, Rusnano owned approximately 16.7% of the issued and outstanding common stock of the registrant. The Purchase Agreement included representations, warranties and covenants customary for a transaction of this type. No underwriting discounts or commissions were paid in this transaction.

The securities sold were not registered under the Securities Act of 1933, as amended (the “Securities Act”), and may not be offered or sold in the United States without registration or an applicable exemption from the registration requirements of the Securities Act. The issuance was made in reliance on Rule 506 promulgated under the Securities Act and was made without general solicitation or advertising. Rusnano represented that it is an accredited investor with access to information about the registrant sufficient to evaluate the investment and that the securities were being acquired without a view to distribution or resale in violation of the Securities Act. A Form D filing was made in accordance with the requirements of Regulation D.

Item 16. Exhibits and Financial Statement Schedules.

(a) Exhibits.

The exhibits to the registration statement are listed in the Exhibit Index attached hereto and incorporated by reference herein.

(b) Financial Statement Schedules.

Financial statement schedules have been omitted, as the information required to be set forth therein is included in the Consolidated Financial Statements or Notes thereto incorporated by reference into the prospectus made part of this registration statement.

Item 17. Undertakings.

Insofar as indemnification for liabilities arising under the Securities Act 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 and will be governed by the final adjudication of such issue.

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The undersigned registrant hereby undertakes that:

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Jose, State of California, on the 3rd day of April, 2015.

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitute and appoint Timothy S. Jenks and Clyde Raymond Wallin, and each one of them, as his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place, and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this registration statement, 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) under the Securities Act, and all post-effective amendments thereto, and to file the same, with all 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 connection therewith, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his or their 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 statement has been signed by the following persons in the capacities and on the dates indicated.

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