UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.    )

Filed by the Registrant x

Filed by a Party other than the Registrant ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to §240.14a-12

PLX TECHNOLOGY, INC.

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Copies to:

Stephen J. Schrader, Esq. Baker & MacKenzie LLP Two Embarcadero Center, 11th Floor San Francisco, CA 94111 (415) 576-3000 Keith E. Gottfried, Esq. Alston & Bird LLP 950 F. Street, N.W. Washington, DC 20004-1404 (202) 239-3679

Payment of Filing Fee (Check the appropriate box):

x No fee required.

¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1)	Title of each class of securities to which transaction applies:
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(3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
(4)	Proposed maximum aggregate value of transaction:
(5)	Total fee paid:

¨ Fee paid previously with preliminary materials:

¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

(1)	Amount previously paid:
(2)	Form, Schedule or Registration Statement No.:
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(4)	Date Filed:

PLX Technology, Inc., a Delaware corporation (“PLX Technology” or the “Company”), is filing materials contained in this Schedule 14A with the U.S. Securities and Exchange Commission (“SEC”) in connection with the solicitation of proxies from its stockholders in connection with its 2013 Annual Meeting of Stockholders to be held on December 18, 2013 and at any and all adjournments or postponements thereof (the “2013 Annual Meeting”). In connection with its 2013 Annual Meeting, PLX Technology has filed a definitive proxy statement and a WHITE proxy card with the SEC on November 12, 2013, and has commenced the mailing of a definitive proxy statement and WHITE proxy card to its stockholders.

PLX Technology Issues Updated Investor Presentation on December 2, 2013

On December 2, 2013, PLX Technology issued an updated investor presentation, which is attached as Exhibit 1 hereto.

Additional Information and Where to Find It

PLX Technology, its directors and certain of its executive officers and employees are deemed to be participants in the solicitation of proxies from PLX Technology’s stockholders in connection with the 2013 Annual Meeting. PLX Technology has filed a definitive proxy statement (the “PLX Proxy Statement”) and a WHITE proxy card with the SEC on November 12, 2013, and has commenced the mailing of a definitive proxy statement and WHITE proxy card to its stockholders, in connection with the solicitation of proxies for the 2013 Annual Meeting. STOCKHOLDERS ARE URGED TO READ THE PLX PROXY STATEMENT (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND ANY OTHER RELEVANT DOCUMENTS THAT PLX TECHNOLOGY WILL FILE WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Additional information regarding the identity of these participants and their direct or indirect interests, by security holdings or otherwise, is set forth in the PLX Proxy Statement. To the extent holdings of PLX Technology’s securities have changed since the amounts shown in the PLX Proxy Statement, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC.

Stockholders can obtain, free of charge, copies of the PLX Proxy Statement and any other documents filed by PLX Technology with the SEC in connection with the 2013 Annual Meeting at the SEC’s website (www.sec.gov), at PLX Technology’s website (www. plxtech.com) or by writing to Company’s investor relations department at 870 W. Maude Avenue, Sunnyvale, California 94085. In addition, copies of the proxy materials may be requested from PLX Technology’s proxy solicitor, MacKenzie Partners, Inc., 105 Madison Avenue, New York, NY 10016 or toll-free at (800) 322-2885.