Information Concerning Solicitation and Voting

General Information About The Meeting

Proposal One: Election of Directors

Nominees

Vote Required

Information About Nominees and Other Directors

Board of Directors Meetings and Committees

Director Independence

Director Qualifications

Corporate Governance Principles

Section 16(a) Beneficial Ownership Reporting Compliance

Executive Sessions of the Independent Directors

Committees of the Board of Directors

Audit Committee

Compensation Committee

Compensation Committee Interlocks and Insider Participation

Corporate Governance/Nominating Committee

Identifying and Evaluating Nominees For Directors

Consideration of Stockholder Nominees to the Board

Board Leadership Structure and Role in Risk Oversight

Transactions with Related Persons

Proposal Two: Advisory Vote on Executive Compensation

Proposal Three: 2006 Equity Incentive Plan Amendment for a Share Increase

Proposal Four: 2006 Employee Stock Purchase Plan Amendment for a Share Increase

Proposal Five: One-time Stock Option Exchange

Proposal Six: Ratification of Appointment of Independent Registered Public Accounting Firm

Our History with PricewaterhouseCoopers

Principal Accountant Fees and Services

Policy on Audit Committee Pre-Approval of Audit and the Permissible Non-Audit Services of Independent Registered Public Accounting Firm

Independence of PricewaterhouseCoopers LLP

Vote Required

Equity Compensation Plan Information

Security Ownership of Certain Beneficial Owners and Management

Executive Officers of the Company

Executive Compensation

Executive Compensation Tables

Summary Compensation Table

Grants of Plan Based Awards

Outstanding Equity Awards at Fiscal Year-End

Option Exercises and Stock Vested

Potential Payments Upon Termination or Change-in-Control

Compensation of Directors

Overview of Compensation and Procedures

Summary of Director Plan

Audit Committee Report

Report of the Audit Committee

Review with Management

Review and Discussions with the Independent Registered Public Accounting Firm

Conclusion

Performance Graph

Other Matters

Who May Attend

Stockholders of Record

If your shares are registered directly in your name, then you are considered to be the stockholder of record with respect to those shares, and we are sending these proxy materials directly to you. To attend the meeting as a stockholder of record, please bring proper identification.

Beneficial Owners

If your shares are held in a stock brokerage account or by a bank or other nominee, you are considered the beneficial owner of shares held in "street name," and your broker or nominee is forwarding these proxy materials to you. Your broker or nominee is considered to be the stockholder of record with respect to those shares. To attend the meeting as a beneficial owner, please bring proper identification and a statement from the broker, bank or other nominee holding your shares that confirms your beneficial ownership of the shares as of the Record Date.

Who May Vote

You may vote at the Annual Meeting if you owned your shares, either as a stockholder of record or as a beneficial owner, as of the close of business on the Record Date. As of that date, we had a total of 110,402,025 shares of common stock outstanding, which were held of record by approximately 689 stockholders. You are entitled to one vote for each share of our common stock that you own.

As of the Record Date, we had no shares of preferred stock outstanding.

Voting Your Proxy

Stockholders of Record

If you hold your shares in your own name as a holder of record, you may instruct the proxy holders how to vote your common stock by:

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voting via the internet at www.proxyvote.com;

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voting by telephone at 1-800-690-6903; or

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signing, dating and mailing the proxy card in the postage-paid envelope that we have provided.

Even if you vote your shares by proxy, you may also choose to attend the meeting and vote your shares in person. If you provide instructions in your completed proxy card, the proxy holders will vote your shares in accordance with those instructions. If you sign and return a proxy card without giving specific voting instructions, your shares will be voted "FOR" all of the proposals described herein.

Beneficial Owners

If you are the beneficial owner of shares held in street name, you have the right to direct your broker how to vote. Your broker or nominee has enclosed with these materials or provided voting instructions for you to use in directing the broker or nominee how to vote your shares.

You are invited to attend the meeting and vote your shares in person at the meeting. However, since you are not the stockholder of record, you must obtain and bring with you to the meeting a "legal proxy" from the broker, bank or other nominee holding your shares that confirms your beneficial ownership of the shares and gives you the right to vote your shares at the meeting.

Discretionary Voting Power; Matters to be Presented

We are not aware of any matters to be presented at the Annual Meeting other than those described in this Proxy Statement. If any matters not described in this Proxy Statement are properly presented at the meeting, the proxy holders will use their own judgment to determine how to vote your shares. If the meeting is adjourned or postponed, the proxy holders can vote your shares on the new meeting date as well, unless you have subsequently revoked your proxy.

Changing Your Vote

Stockholders of Record

If you would like to change your vote you can do so in the following ways:

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deliver written notice of your revocation to our corporate Secretary prior to the Annual Meeting;

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deliver a properly executed, later dated proxy prior to the Annual Meeting; or

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attend the Annual Meeting and vote in person.

Please note that your attendance at the meeting in and of itself is not enough to revoke your proxy.

Beneficial Owners

If you instructed a broker or nominee to vote your shares following the directions originally included with these materials or provided to you, you can change your vote only by following your broker or nominee's directions for doing so. You can only change your vote at the Annual Meeting if you have obtained a "legal proxy" from the broker, bank or other nominee holding your shares that confirms your beneficial ownership of the shares and gives you the right to vote your shares at the meeting.

Cost of this Proxy Solicitation

We will bear the cost of this proxy solicitation. In addition to soliciting proxies by mail, our directors, officers and employees may solicit proxies in person or by telephone. None of these individuals will receive any additional or special compensation for doing this, but they may be reimbursed for reasonable out-of-pocket expenses. We have also hired Morrow & Co., LLC to help us solicit proxies from brokers, bank nominees and other institutional owners. We expect to pay Morrow & Co., LLC a fee of up to approximately $28,500 for its services, and we will reimburse certain out-of-pocket expenses.

Meeting Quorum

The Annual Meeting will be held if a majority of our outstanding shares of common stock entitled to vote at the meeting are represented in person or by proxy.

Our Voting Recommendations

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"FOR" the election of J. Thomas Bentley, Sunlin Chou, Ph.D., Harold Hughes and Abraham D. Sofaer as Class I directors;

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"FOR" the approval of named executive officer compensation, as disclosed in this Proxy Statement;

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"FOR" the amendment to our 2006 Equity Incentive Plan to increase the number of shares of common stock reserved for issuance under such plan by 6,500,000 shares;

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"FOR" the amendment to our 2006 Employee Stock Purchase Plan to increase the number of shares of common stock reserved for issuance under such plan by 1,500,000 shares;

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"FOR" the approval of a one-time stock option exchange program; and

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"FOR" the ratification of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2012.

Abstentions, Withheld, and Broker Non-Votes

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present for purposes of determining whether or not a quorum is present at the Annual Meeting; and

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entitled to vote on a particular subject matter at the Annual Meeting.

In the election of directors, any vote you make that is a "WITHHELD" or "ABSTAIN" for any nominee will not impact the election of that nominee. In tabulating the voting results for the election of directors, only "FOR" and "AGAINST" votes are counted.

For the other proposals, a "WITHHELD" or "ABSTAIN" vote is the same as voting against the proposal.

If you hold your common stock through a broker, the broker may be prevented from voting shares held in your brokerage account on some proposals (a "broker non-vote") unless you have given the broker voting instructions. Thus, if you hold your common stock through a broker, it is critical that you cast your vote if you want it to count. If you hold your common stock through a broker and you do not instruct your broker how to vote on Proposals One, Two, Three, Four and Five, it will be considered a broker non-vote and no votes will be cast on your behalf with respect to such Proposal(s). Shares that are subject to a broker non-vote are counted for purposes of determining whether a quorum exists but do not count for or against any particular proposal.

Your broker will continue to have discretion to vote any uninstructed shares on Proposal Six, the Ratification of the Appointment of the Company's Independent Registered Public Accounting Firm.

Deadline for Receipt of Stockholder Proposals

Stockholders may present proposals for action at a future annual meeting only if they comply with the requirements of our bylaws and the proxy rules established by the Securities and Exchange Commission ("SEC").

Stockholder proposals, including nominations for the election of directors, which are intended to be presented by such stockholders at our 2013 Annual Meeting of Stockholders must be received by us no later than November 18, 2012 to be considered for inclusion in the proxy statement and proxy card relating to that meeting.

In addition to the SEC rules, our bylaws establish an advance notice procedure for proposals that a stockholder wants to have included in our proxy statement relating to a meeting or to have brought before the meeting. Generally for these proposals, including the nomination of a person for director, a stockholder must provide written notice to our corporate Secretary at least 90 days in advance of the meeting. However, in the event that less than 100 days notice or prior public disclosure of the date of the meeting is given or made to stockholders, notice by the stockholder to be timely must be received not later than the close of business on the tenth day following the day on which such notice of the date of the meeting was mailed or such public disclosure was made.

Moreover, your notice must contain specific information concerning the matters to be brought before the meeting. We urge you to read our bylaws in full in order to understand the requirements of bringing a proposal or nomination.

A copy of the full text of the bylaw provision relating to our advance notice procedure may be obtained by writing to our corporate Secretary or by accessing a copy of our bylaws, which are publicly available at http://www.sec.gov. All notices of proposals by stockholders, whether or not included in proxy materials, should be sent to Rambus Inc., 1050 Enterprise Way, Suite 700, Sunnyvale, California 94089, Attention: Secretary.

Communication With the Board of Directors

Our Board of Directors may be contacted by writing to them via regular mail at Board of Directors, Rambus Inc., 1050 Enterprise Way, Suite 700, Sunnyvale, California 94089. If you wish to contact our Board of Directors or any member of the Audit Committee to report questionable accounting or auditing matters you may do so anonymously by using this mailing address and designating the communication as "confidential."

Our process for handling communications to our Board of Directors is as follows:

Any stockholder communications that our Board of Directors receives will first go to our Secretary/General Counsel, who will log the date of receipt of the communication as well as (for non-confidential communications) the identity of the correspondent in our stockholder communications log.

Unless the communication is marked "confidential," our Secretary/General Counsel will review, summarize and, if appropriate, draft a response to the communication in a timely manner. The

summary and response will be in the form of a memo, which will become part of the stockholder communications log that our Secretary/General Counsel maintains with respect to all stockholder communications.

Our Secretary/General Counsel will then forward the original stockholder communication along with the memo to the member(s) of our Board of Directors (or committee chair if the communication is addressed to a committee) for review.

Any stockholder communication marked "confidential" will be logged by our Secretary/General Counsel as "received" but will not be reviewed, opened or otherwise held by our Secretary/General Counsel. Such confidential correspondence will be immediately forwarded to the addressee(s) without a memo or any other comment by our Secretary/General Counsel.

Annual Meeting Attendance

Members of our Board of Directors are invited but not required to attend the Annual Meeting of Stockholders. The 2011 Annual Meeting of Stockholders was attended by the following members of our Board of Directors: Ms. Herscher and Messrs. Chou, Dunlevie, Hughes, Shrigley, Sofaer and Stang.

"Householding" of Proxy Materials

The SEC has adopted rules that permit companies and intermediaries such as brokers to satisfy delivery requirements for proxy statements with respect to two or more stockholders sharing the same address by delivering a single proxy statement addressed to those stockholders. This process, which is commonly referred to as "householding," potentially provides extra convenience for stockholders and cost savings for companies. The Company and some brokers household proxy materials, delivering a single proxy. If your proxy statement is being householded and you would like to receive separate copies, or if you are receiving multiple copies and would like to receive a single copy, please contact Investor Relations at Rambus Inc., 1050 Enterprise Way, Suite 700, Sunnyvale, California 94089, Attention: Secretary, or ir@rambus.com, or place a collect call to the Company, at (408) 462-8000, and direct the call to the Investor Relations Department.

Delivery of Proxy Materials

To receive current and future proxy materials, such as annual reports, proxy statements and proxy cards, in either paper or electronic form, please contact Investor Relations at ir@rambus.com or http://investor.rambus.com, or place a collect call to the Company, at (408) 462-8000, and direct the call to the Investor Relations Department.

Nominees

If any of J. Thomas Bentley, Sunlin Chou, Ph.D., Harold Hughes or Abraham D. Sofaer is unable or declines to serve as a director at the time of the Annual Meeting, proxies will be voted for a substitute nominee or nominees designated by the Board of Directors.

Mr. Bentley was previously a Class II director. Due to the departure of two directors in 2011, Mr. Bentley and the Board of Directors have decided that effective the date of the filing of this proxy statement, Mr. Bentley will become a Class I director and will stand for reelection at the Annual Meeting.

Vote Required

The Company's bylaws require that each director be elected by the majority of votes cast with respect to such director in uncontested elections. The Board of Directors, after taking into consideration the recommendation of the Corporate Governance and Nominating Committee of the Board, will determine whether or not to accept the pre-tendered resignation of any nominee for director, in an uncontested election, who receives a greater number of votes "AGAINST" his or her election than votes "FOR" such election. There are no cumulative voting rights in the election of directors. Stockholders as of the Record Date may vote their shares for or against some, all or none of the Class I nominees.

Information About Nominees and Other Directors

The members of our Board of Directors have deep executive and board leadership experience derived from their respective tenures as executives and directors of technology companies of various sizes. The following table contains information regarding the Class I nominees and other directors as of March 1, 2012. This information includes the specific experience, qualifications, attributes and skills that led to the Board of Directors' conclusion that the person should serve as a director.

J. Thomas Bentley

Mr. Bentley's financial expertise and years of business and leadership experience, including fifteen years as a co-founder of a financial advisory firm, allow him to provide strategic guidance to us and led the Board of Directors to conclude that he should serve as a director. In addition, our Board of Directors' determination that Mr. Bentley is the Audit Committee "financial expert" lends further support to his financial acumen and qualifications for serving on our Board of Directors.

Sunlin Chou, Ph.D. 

Dr. Chou was appointed to the Board of Directors in March 2006. Dr. Chou served for 34 years at Intel Corporation, before retiring in 2005 as a senior vice president. He was co-general manager of the Technology and Manufacturing Group from 1998 to 2005. Dr. Chou holds a B.S., M.S. and E.E. in Electrical Engineering from Massachusetts Institute of Technology and received a Ph.D. in Electrical Engineering from Stanford University. Dr. Chou serves on the board of several non-profit institutions.

During his career, Dr. Chou organized and led research and development teams to innovate rapidly and continuously in order to maintain technological leadership. Dr. Chou's understanding of the technical, organizational and strategic business aspects of the semiconductor integrated circuit industry led the Board of Directors to conclude that he should serve as a director.

Harold Hughes

Mr. Hughes has served as our chief executive officer and president since January 2005 and as a director since June 2003. He served as a United States Army Officer from 1969 to 1972 before starting his private sector career at Intel Corporation. Mr. Hughes held a variety of positions within Intel Corporation from 1974 to 1997, including treasurer, vice president of Intel Capital, chief financial officer, and vice president of Planning and Logistics. Following his tenure at Intel, Mr. Hughes was the chairman and chief executive officer of Pandesic, LLC. He holds a B.A. from the University of Wisconsin and an M.B.A. from the University of Michigan. In the past five years, he has served as a director of Berkeley Technology, Ltd. and a private company.

Mr. Hughes' seven-year tenure as our Chief Executive Officer, his prior leadership experience at Intel Corporation and his ability to provide deep and valuable operational and strategic insight to the Board of Directors led the Board of Directors to conclude that he should serve as a director. The Company has begun a search for a successor to Mr. Hughes who is planning to retire from his current position; however, Mr. Hughes will continue in his position as chief executive officer until a successor is named.

Abraham D. Sofaer

Mr. Sofaer has served as a director since May 2005. He has been the George P. Shultz Distinguished Scholar and Senior Fellow at the Hoover Institution at Stanford University since 1994. Mr. Sofaer has a long and distinguished career in the legal profession. Prior to assuming his current roles, he served in private practice as a partner at Hughes, Hubbard & Reed in Washington, D.C. and as the chief legal adviser to the U.S. Department of State. From 1979 to 1985, Mr. Sofaer served as a U.S. District Judge for the Southern District of New York. He was a professor at the Columbia University School of Law from 1969 to 1979, and from 1967 to 1969 was an Assistant U.S. Attorney in the Southern District of New York. Mr. Sofaer graduated magna cum laude with a B.A. in History from Yeshiva College and received his law degree from the New York University School of Law where he was editor-in-chief of the NYU Law Review. He clerked for Hon. J. Skelly Wright on the U.S. Court of Appeals for the District of Columbia Circuit and for Justice William J. Brennan, Jr. on the U.S. Supreme Court. In the past five years, Mr. Sofaer has served as a director of Gen-Probe, Inc. and several private companies and non-profit institutions.

Mr. Sofaer's extensive and varied experience in legal affairs allows him to assist us with the complex legal challenges we face and led the Board of Directors to conclude that he should serve as a director. He has brought a unique legal and strategic perspective to us and rendered specific contributions by serving on the Special Litigation Committee that helped us deal with the options backdating matter, and by leading the settlement negotiation of the shareholder action stemming from the same affair. Until the appointment of our present General Counsel, he served as the Chair of the Committee on Legal Affairs, which helped formulate policy and strategy in defense of legal challenges. In addition, his experience in government and public policy has enabled him to serve as a valuable member of our Audit Committee and Corporate Governance/Nominating Committee.

P. Michael Farmwald, Ph.D. 

Dr. Farmwald's status as one of our founders and an inventor of the Farmwald/Horowitz patents, his twenty-year tenure on our Board of Directors and his deep technical expertise led the Board of Directors to conclude that he should serve as a director.

Penelope A. Herscher

Ms. Herscher has served as a director since July 2006. She currently holds the position of president and chief executive officer of FirstRain, Inc., a custom-configured, on-demand intelligence services firm, which she joined in 2005. Ms. Herscher previously held the position of executive vice president and chief marketing officer at Cadence Design Systems from 2002 to 2003, and executive vice president and general manager, Design and Verification Business during the second half of 2003. From 1996 to 2002, Ms. Herscher was president and chief executive officer of Simplex Solutions, which was acquired by Cadence in 2002. Before Simplex, she was an executive at Synopsys for eight years and started her career as an R&D engineer with Texas Instruments. She holds a M.A. with honors in Mathematics from Cambridge University in England. Ms. Herscher serves on the boards of FirstRain, JDS Uniphase, Inc. and several non-profit institutions.

Ms. Herscher's experience as chief executive officer of technology companies, the successful sale of a company under her leadership to a larger technology company and her years of business and leadership experience led the Board of Directors to conclude that she should serve as a director.

David Shrigley

Mr. Shrigley has served as a director since October 2006. He is currently the Executive Chairman of Soil and Topography Information, Inc. Mr. Shrigley was a member of the board of Wolfson Microelectronics plc, a supplier of mixed-signal chips for the digital market from November 2006 to December 2008, and was its chief executive officer from March 2007. He

served as a general partner at Sevin Rosen Funds, a venture capital firm, from 1999 to 2005. Prior to that, Mr. Shrigley held the position of executive vice president, Marketing, Sales and Service at Bay Networks. Mr. Shrigley served in various executive positions at Intel, including vice president and general manager of Asia Pacific sales and marketing operations based in Hong Kong, and vice president and general manager, corporate marketing. Mr. Shrigley holds a B.S. in Business Administration from Franklin University. In the past five years, Mr. Shrigley has served on the board of Wolfson Microelectronics plc, and currently serves on the board of a private company.

Mr. Shrigley's experience as a director and executive officer of high technology companies, his experience in the venture capital industry and his years of international business and leadership experience led the Board of Directors to conclude that he should serve as a director.

Eric Stang

Mr. Stang has served as a director since July 2008. Mr. Stang currently serves as a director, president and chief executive officer of Ooma, Inc., a provider of broadband telephony products, a position he has held since January 2009. Prior to joining Ooma, Mr. Stang served as a director, chief executive officer and president of Reliant Technologies,  Inc., a developer of medical technology solutions for aesthetic applications, from 2006 to 2008. Mr. Stang previously served as chief executive officer and president of Lexar Media, Inc., a provider of solid state memory products from 2001 to 2006 and Chairman from 2004 to 2006. Mr. Stang received his A.B. from Stanford University and M.B.A. from the Harvard Business School. Mr. Stang also serves on the boards of Solta Medical and several private companies.

Mr. Stang's experience as chief executive officer of high technology companies, his prior experience in the memory products market and his years of business and leadership experience led the Board of Directors to conclude that he should serve as a director.

Board of Directors Meetings and Committees

Director Independence

Our Board of Directors has determined that each of the following directors, constituting a majority of our Board of Directors, has no material relationship with us (either directly as a partner, stockholder or officer of an organization that has a relationship with us) and is "independent" as defined under Nasdaq Rule 5605 and the applicable rules promulgated by the SEC: J. Thomas Bentley, Sunlin Chou, P. Michael Farmwald, Penelope A. Herscher, David Shrigley, Abraham D. Sofaer and Eric Stang.

Audit Committee:

Eric Stang (Chair)

Compensation

Penelope A. Herscher (Chair)

Corporate Governance/

Sunlin Chou (Chair)

Director Qualifications

Corporate Governance Principles

Section 16(a) Beneficial Ownership Reporting Compliance

Section 16(a) of the Securities Exchange Act requires our executive officers, directors and ten percent stockholders to file reports of ownership and changes in ownership with the SEC. The same persons are required to furnish us with copies of all Section 16(a) forms they file. Based on our review of these forms, we believe that during fiscal 2011 all of our executive officers, directors and ten percent stockholders complied with the applicable filing requirements.

Executive Sessions of the Independent Directors

It is the policy of the Board of Directors to have executive sessions of the independent directors at which only independent directors are present, typically in conjunction with the regularly scheduled meetings of the Board of Directors.

Committees of the Board of Directors

During 2011, our Board of Directors had three standing committees:

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an Audit Committee,

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a Compensation Committee and

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a Corporate Governance/Nominating Committee.

The following describes each committee, its function, its membership, and the number of meetings held during 2011.

Each of the committees operates under a written charter adopted by our Board of Directors. All of the current committee charters are available on our website at http://investor.rambus.com/documents.cfm.

Audit Committee

Currently, the Audit Committee is composed of Eric Stang, J. Thomas Bentley and P. Michael Farmwald, with Mr. Stang serving as Chair. The Audit Committee oversees our corporate accounting and financial reporting processes and internal control over financial reporting, as well as our internal and

external audits. The Audit Committee held eight meetings during 2011. Its duties include:

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Reviewing our accounting and financial reporting processes and internal control over financial reporting;

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Providing oversight and review at least annually of our risk management policies, including our investment policy;

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Retaining the independent registered public accounting firm, approving their fees, and providing oversight of communication with them;

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Reviewing the plans, findings and performance of our internal auditors;

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Reviewing our annual and quarterly financial statements and related disclosure documents; and

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Overseeing special investigations into financial and other matters, as necessary.

Our Board of Directors has determined that Mr. Bentley is the Audit Committee "financial expert" and that Mr. Bentley, together with each of Mr. Stang and Dr. Farmwald, has no material relationship with us (either directly as a partner, stockholder or officer of an organization that has a relationship with us) and is an "independent director" as defined under Nasdaq Rule 5605 and the applicable rules promulgated by the SEC.

The Audit Committee's role is detailed in the Audit Committee Charter and is available on our website at
http://investor.rambus.com/documentdisplay.cfm?DocumentID=5108.

Compensation Committee

Currently, the Compensation Committee is composed of Penelope A. Herscher, David Shrigley and Abraham D. Sofaer, with Ms. Herscher serving as Chair. All members of the Compensation Committee are non-employee, outside directors. The Compensation Committee reviews and determines all forms of compensation to be provided to our executive officers, including the named executive officers and directors of Rambus, including base compensation, bonuses, and stock compensation. The Compensation Committee held nine meetings during 2011. Its duties include:

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Annually review and approve the Chief Executive Officer ("CEO") and other executive officers' compensation in the context of their performance, which includes reviewing and approving their annual base salary, annual incentive bonus, including the specific goals, targets, and amounts, equity compensation, and any employment agreements, and any other benefits, compensation or arrangements, as applicable;

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Administer our stock option and equity incentive plans pursuant to the terms of such plans and the authority delegated by our Board of Directors, including: granting stock options, stock appreciation rights, restricted stock, restricted stock units or other equity compensation to individuals eligible for such grants and amend such awards following their grant; amending the plans; and delegating to appropriate executive officers of the Company the ability to grant awards to non-executive officer employees of the Company pursuant to specific guidelines;

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Adopt, amend and oversee the administration of our significant employee benefits programs;

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Review external surveys to establish appropriate ranges of compensation;

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Retain and terminate any compensation consultant to assist in the evaluation of CEO or executive officer or director compensation, and approve the consultant's fees and other ter ms of service, as well as obtain advice and assistance from internal or external legal, accounting or other advisors; and

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Conduct an annual assessment of the Company's engagement with compensation consultants retained by the Board and/or management, as applicable, including the nature and extent of services provided, the amount of fees paid and who made or recommended the decision to retain the compensation consultants.

The Compensation Committee uses Semler Brossy Consulting Group, LLC (SBCG) to assist in evaluating executive and director compensation.

A detailed description of the processes and procedures of the Compensation Committee for considering and determining executive and director compensation, including the role of SBCG, is provided in the "Executive Compensation" section of this proxy statement.

The Compensation Committee's role is detailed in the Compensation Committee Charter, which is available on our website at
http://investor.rambus.com/documentdisplay.cfm?DocumentID=5109.

Compensation Committee Interlocks and Insider Participation

During 2011, there were no interlocking relationships. Please see the Compensation Discussion and Analysis section of this Proxy Statement for further discussion.

Corporate Governance/Nominating Committee

Currently, the Corporate Governance/Nominating Committee is composed of Sunlin Chou, David Shrigley and Abraham D. Sofaer, with Dr. Chou serving as Chair. The Corporate Governance/Nominating Committee held six meetings during 2011.

The Corporate Governance/Nominating Committee recommends and approves Rambus' Corporate Governance Guidelines. Its duties include:

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Evaluating and making recommendations to the Board of Directors concerning the appointment of directors to committees of the Board of Directors and the selection of committee chairs;

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Identifying best practices and recommending corporate governance principles;

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Overseeing the evaluation of the Board of Directors; and

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Proposing the slate of nominees for election to the Board of Directors.

The Corporate Governance/Nominating Committee's role is detailed in the Corporate Governance/Nominating Committee Charter which is available on our website at
http://investor.rambus.com/documentdisplay.cfm?DocumentID=5110.

Identifying and Evaluating Nominees For Directors

The Corporate Governance/Nominating Committee utilizes a variety of methods for identifying and evaluating nominees for director, including those discussed in the "Director Qualifications" section of this proxy statement. In the event that vacancies on the Board of Directors are anticipated, or otherwise arise, the committee will consider various potential candidates for director. Candidates may come to the attention of the committee through current members of the Board of Directors, professional search firms, stockholders or other persons. The Corporate Governance/Nominating Committee has from time to time retained third parties to whom a fee is paid to assist it in identifying or evaluating potential director nominees.

Consideration of Stockholder Nominees to the Board

It is the policy of the Corporate Governance/Nominating Committee to consider nominees recommended by stockholders for election to our Board of Directors. Stockholder recommendations for candidates to our Board of Directors must be directed in writing to Rambus Inc., 1050 Enterprise Way, Suite 700, Sunnyvale, CA 94089 Attention: Secretary, and must include: the candidate's name, age, business address and residence address; the candidate's principal occupation or employment; the number of shares of the Company which are beneficially owned by such candidate;

a description of all arrangements or understandings between the stockholder making such nomination and any other person or persons (naming such person or persons) pursuant to which the nominations are to be made by the stockholder; detailed biographical data and qualifications; information regarding any relationships between the candidate and the Company within the last three years; any other information relating to such nominee that is required to be disclosed in solicitations of proxies for elections of directors, or is otherwise required, in each case pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended. A stockholder's recommendation to the Secretary must also set forth: the name and address, as they appear on the Company's books, of the stockholder making such recommendation; the class and number of shares of the Company which are beneficially owned by the stockholder and the date such shares were acquired by the stockholder; any material interest of the stockholder in such nomination; any other information that is required to be provided by the stockholder pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended, in his capacity as a proponent to a stockholder proposal; and a statement from the recommending stockholder in support of the candidate, references for the candidate, and an indication of the candidate's willingness to serve, if elected.

Board Leadership Structure and Role in Risk Oversight

Our Corporate Governance Guidelines require that the Chairperson of the Board not be the CEO of the Company. In addition, while the Chairperson works closely with the CEO and other members of our management, the Chairperson is not part of management and does not have an operating or external role or responsibility. The Board of Directors considers it useful and appropriate to designate a Chairperson to act as the presiding director at Board of Directors meetings, to call and organize such meetings and manage the agenda thereof, and to manage the affairs of the Board of Directors, including ensuring that the Board of Directors is organized properly, functions effectively, and meets its obligations and responsibilities. The Chairperson also acts as the principal contact for the CEO and other members of the Board of Directors and management, as appropriate, for matters requiring the attention of the full Board of Directors. We believe that this leadership structure is appropriate given the attention, time, effort, and energy that the CEO is required to dedicate to his position in the current business environment, and the high level of commitment required to serve as our Chairperson.

The Board of Directors plays an integral role in our risk oversight processes. The Board of Directors meets regularly to receive reports from its committees, as well as from management with respect to areas of material risk to the

Company, including legal, operational, financial and strategic risks. In addition, the Audit Committee oversees and reviews at least annually our risk management policies, including our investment policies.

Transactions with Related Persons

None.

Review, Approval or Ratification of Transactions with Related Persons

Our directors and executive officers are subject to our Code of Business Conduct and Ethics, and our directors are guided in their duties by our Corporate Governance Guidelines. Our Code of Business Conduct and Ethics requires that our directors and executive officers avoid situations where a conflict of interest might occur or appear to occur. In general, our directors and executive officers should not have a pecuniary interest in transactions involving us or a customer, licensee, or supplier of us, unless such interest is solely a result of routine investments made by the individual in publicly traded companies.

In the event that a director or executive officer is going to enter into a related party transaction with a relative or significant other, or with a business in which a relative or significant other is associated in any significant role, the director or executive officer must fully disclose the nature of the related party transaction to our Chief Financial Officer. For directors and executive officers, such related party transaction then must be reviewed and approved in advance by the Audit Committee. For other conflicts of interest that may arise, the Code of Business Conduct and Ethics advises our directors and executive officers to consult with our General Counsel.

In addition, each director and officer is required to complete a Director and Officer Questionnaire on an annual basis and upon any new appointment, which requires disclosure of any related-party transactions pertaining to the director or executive officer. Our Board of Directors will consider such information in its determinations of independence with respect to our directors under Nasdaq Rule 5605 and the applicable rules promulgated by the SEC.

Vote Required; Recommendation of the Board of Directors

Our Board of Directors recommends that you vote "FOR" the Amendment to the 2006 Equity Incentive Plan and the increase to the number of shares reserved for issuance thereunder.

Summary of the 2006 Equity Incentive Plan

The following is a summary of the principal features of the Incentive Plan and its operation. The summary is qualified in its entirety by reference to the Incentive Plan, as amended giving effect to this Proposal Three, set forth in Appendix A.

The Incentive Plan provides for the grant of the following types of incentive awards:

•

stock options

•

stock appreciation rights

•

restricted stock

•

restricted stock units

•

performance shares and performance units

•

other stock or cash awards

Each of these is referred to individually as an "Award." Those who are eligible for Awards under the Incentive Plan include employees, directors and consultants who provide services to the Company and its affiliates. As of March 1, 2012, approximately 500 employees, directors and consultants would be eligible to participate in the Incentive Plan.

Number of Shares of Common Stock Available Under the Incentive Plan

If stockholders approve Proposal 3, an additional 6,500,000 shares of the Company's Common Stock will be reserved for issuance under the Incentive Plan. As of March 1, 2012, 10.9 million shares were subject to outstanding options granted under the Incentive Plan, with a weighted average exercise price of $16.38 per share and weighted average remaining term of 7.48 years, and 1.0 million shares were subject to outstanding RSUs granted and unvested under the Incentive Plan. 0.3 million shares remained available for any new Awards to be granted in the future. Shares subject to Awards (excluding stock options) granted with an exercise price less than the fair market value on the date of grant count against the share reserve as 1.5 shares for every one share subject to such an Award. To the extent that a share that was subject to an Award that counted as 1.5 shares against the Incentive Plan reserve pursuant to the preceding sentence is returned to the Incentive Plan, the Incentive Plan reserve will be credited with 1.5 shares that will thereafter be available for issuance under the Incentive Plan.

If an Award expires or becomes unexercisable without having been exercised in full, or, with respect to full value awards, is

forfeited to or repurchased by the Company, the unpurchased (or forfeited or repurchased, as applicable) shares that were subject to the Award will become available for future grant or sale under the Incentive Plan. Upon exercise of a stock appreciation right settled in shares, the gross number of shares covered by the portion of the Award that is exercised will cease to be available under the Incentive Plan. Shares that have been issued under the Incentive Plan under any Award will not be returned to or become available for future distribution under the Incentive Plan; provided, however, that if unvested shares of any full value awards are repurchased by the Company or are forfeited to the Company, those shares will become available for future grant under the Incentive Plan. Shares used to pay the exercise or purchase price of an Award and/or to satisfy the tax withholding obligations related to an Award will not become available for future grant or sale under the Incentive Plan. To the extent an Award is paid out in cash rather than Shares, such cash payments will not reduce the number of Shares available for issuance under the Incentive Plan.

If we declare a stock dividend or engage in a reorganization or other change in our capital structure, including a merger, our Board of Directors will have the discretion to adjust the number of shares:

•

available for issuance under the Incentive Plan

•

subject to outstanding Awards

•

specified as per-person limits on Awards, as appropriate to reflect the change

Administration of the Incentive Plan

A committee or committees of independent, non-employee directors satisfying applicable laws and appointed by our Board of Directors administers the Incentive Plan. To make grants to certain of our officers and key employees, the members of the committee(s) must qualify as "non-employee directors" under Rule 16b-3 of the Securities Exchange Act of 1934, and as "outside directors" under Section 162(m) of the Internal Revenue Code of 1986, as amended (the "Code") so that we can receive a federal tax deduction for certain compensation paid under the Incentive Plan. Subject to the terms of the Incentive Plan, the administrator has the sole discretion to select the employees, consultants, and directors who will receive Awards, determine the terms and conditions of Awards, and to interpret the provisions of the Incentive Plan and outstanding Awards. Notwithstanding the foregoing, without the consent of the Company's stockholders and the applicable Award holder, the administrator may not modify or amend an option or stock appreciation right to reduce the exercise price of that Award after it has been granted or to cancel any outstanding option or stock appreciation right and

replace it with a new option or stock appreciation right with a lower exercise price.

Options

The administrator is able to grant nonstatutory stock options and incentive stock options under the Incentive Plan. The administrator determines the number of shares subject to each option, although the Incentive Plan provides that a participant may not receive options for more than 1,000,000 shares in any fiscal year, except in connection with his or her initial service as an employee with us, in which case he or she may be granted an option to purchase up to an additional 1,000,000 shares.

The administrator determines the exercise price of options granted under the Incentive Plan, provided the exercise price must be at least equal to the fair market value of our Common Stock on the date of grant. In addition, the exercise price of an incentive stock option granted to any participant who owns more than 10% of the total voting power of all classes of our outstanding stock must be at least 110% of the fair market value of our Common Stock on the grant date.

The term of an option may not exceed ten years, except that, with respect to any participant who owns 10% of the voting power of all classes of our outstanding capital stock, the term of an incentive stock option may not exceed five years.

After termination of service with us, a participant will be able to exercise the vested portion of his or her option for the period of time stated in the Award agreement. If no such period of time is stated in the participant's Award agreement, the participant will generally be able to exercise his or her option for (i) three months following his or her termination for reasons other than death or disability, and (ii) twelve months following his or her termination due to death or disability. In no event may an option be exercised later than the expiration of its term.

Stock Appreciation Rights

The administrator is able to grant stock appreciation rights, which are the rights to receive the appreciation in fair market value of common stock between the exercise date and the date of grant. We can pay the appreciation in either cash or shares of common stock. Stock appreciation rights become exercisable at the times and on the terms established by the administrator, subject to the terms of the Incentive Plan. The administrator, subject to the terms of the Incentive Plan, has complete discretion to determine the terms and conditions of stock appreciation rights granted under the Incentive Plan, provided, however, that the exercise price may not be less than 100% of the fair market value of a share on the date of grant. The term of a stock appreciation right may not exceed ten years. No participant will be granted stock appreciation rights covering more than 1,000,000 shares during any fiscal

year, except that a participant may be granted stock appreciation rights covering up to an additional 1,000,000 shares in connection with his or her initial service as an employee with us. Shares retained by the Company to pay withholding taxes in connection with the grant of a stock appreciation right do not become available for issuance as future awards under the Incentive Plan.

After termination of service with us, a participant will be able to exercise the vested portion of his or her stock appreciation right for the period of time stated in the Award agreement. If no such period of time is stated in a participant's Award agreement, a participant will generally be able to exercise his or her stock appreciation right for (i) three months following his or her termination for reasons other than death or disability, and (ii) twelve months following his or her termination due to death or disability. In no event will a stock appreciation right be exercised later than the expiration of its term.

Restricted Stock

Awards of restricted stock are rights to acquire or purchase shares of our Common Stock, which vest in accordance with the terms and conditions established by the administrator in its sole discretion provided, however, that, an Award of restricted stock will not vest more rapidly than one-third (1/3rd) of the total number of shares of restricted stock each year from the date of grant, unless the administrator determines that the Award of restricted stock is to vest upon on the achievement of performance criteria and the period for measuring such performance will cover at least twelve (12) months; provided, further, that the administrator may grant Awards of restricted stock, restricted stock units, and performance units/shares covering up to 5% of the total number of shares reserved for issuance under the Plan that do not satisfy the forgoing vesting requirements.

The administrator, in its sole discretion, may provide at the time of or following the date of grant for accelerated vesting for an Award of restricted stock (except that the number of shares subject or issuable pursuant to Awards of restricted stock, restricted stock units, and performance units/shares eligible for such accelerated vesting shall not exceed 5% of the total number of shares reserved for issuance under the Plan) or for accelerated vesting upon or in connection with a change in control or upon or in connection with a participant's termination of service due to death, disability or retirement.

The Award agreement generally will grant us a right to repurchase or reacquire the shares upon the termination of the participant's service with us for any reason (including death or disability). The administrator will determine the number of shares granted pursuant to an Award of restricted stock, but no participant will be granted a right to purchase or

acquire more than 200,000 shares of restricted stock during any fiscal year, except that a participant may be granted up to an additional 300,000 shares of restricted stock in connection with his or her initial employment with us.

Restricted Stock Units

Awards of restricted stock units result in a payment to a participant only if the vesting criteria the administrator establishes is satisfied, provided, however, that, an Award of restricted stock units will not vest more rapidly than one-third (1/3rd) of the total number of restricted stock units each year from the date of grant, unless the administrator determines that the restricted stock units are to vest upon the achievement of performance criteria and the period for measuring such performance will cover at least twelve (12) months; provided, further, that the administrator may grant Awards of restricted stock, restricted stock units, and performance units/shares covering up to 5% of the total number of shares reserved for issuance under the Plan that do not satisfy the forgoing vesting requirements. Upon satisfying the applicable vesting criteria, the participant will be entitled to the payout specified in the Award agreement.

Notwithstanding the foregoing and subject to any restrictions otherwise provided herein, at any time after the grant of restricted stock units, the administrator may reduce or waive any vesting criteria that must be met to receive a payout.

Further, the administrator, in its sole discretion, may provide at the time of or following the date of grant for accelerated vesting for an Award of restricted stock (except that the number of shares subject or issuable pursuant to Awards of restricted stock, restricted stock units, and performance units/shares eligible for such accelerated vesting shall not exceed 5% of the total number of shares reserved for issuance under the Plan) or for accelerated vesting upon or in connection with a change in control or upon or in connection with a participant's termination of service due to death, disability or retirement.

The administrator, in its sole discretion, may pay earned restricted stock units in cash, shares, or a combination thereof. Restricted stock units that are fully paid in cash will not reduce the number of shares available for grant under the Incentive Plan. On the date set forth in the Award agreement, all unearned restricted stock units will be forfeited to us. The administrator determines the number of restricted stock units granted to any participant, but during any fiscal year, no participant may be granted more than 200,000 restricted stock units, except that the participant may be granted up to an additional 300,000 restricted stock units in connection with his or her initial employment with us.

Performance Units and Performance Shares

The administrator is able to grant performance units and performance shares, which are Awards that result in a payment to a participant only if the performance goals or other vesting criteria the administrator establishes are achieved or the Awards otherwise vest, provided, however, that, Awards of performance units and performance shares will not vest more rapidly than one-third (1/3rd) of the total number of performance units and performance shares each year from the date of grant, unless the administrator determines that the performance units and performance shares are to vest upon the achievement of performance criteria and the period for measuring such performance will cover at least twelve (12) months; provided, further, that the administrator may grant Awards of restricted stock, restricted stock units, and performance units/shares covering up to 5% of the total number of shares reserved for issuance under the Plan that do not satisfy the forgoing vesting requirements.

The administrator, in its sole discretion, may provide at the time of or following the date of grant for accelerated vesting for an Award of performance units and performance shares (except that the number of shares subject or issuable pursuant to awards of restricted stock, restricted stock units, and performance units/shares eligible for such accelerated vesting shall not exceed 5% of the total number of shares reserved for issuance under the Plan) or for accelerated vesting upon or in connection with a change in control or upon or in connection with a participant's termination of service due to death, disability or retirement.

The administrator establishes performance or other vesting criteria in its discretion, which, depending on the extent to which they are met, will determine the number and/or the value of performance units and performance shares to be paid out to participants. Notwithstanding the foregoing, after the grant of performance units or shares, the administrator, in its sole discretion, may reduce or waive any performance objectives or other vesting provisions for such performance units or shares. During any fiscal year, no participant will receive more than 200,000 performance shares and no participant will receive performance units having an initial value greater than $2,000,000, except that a participant may be granted performance shares covering up to an additional 300,000 shares in connection with his or her initial employment with us. Performance units will have an initial dollar value established by the administrator on or before the date of grant. Performance shares will have an initial value equal to the fair market value of a share of our Common Stock on the grant date.

Performance Goals

Awards of restricted stock, restricted stock units, performance shares, performance units and other incentives under the Incentive Plan may be made subject to the attainment of performance goals relating to one or more business criteria within the meaning of Section 162(m) of the Code and may provide for a targeted level or levels of achievement including: cash flow; cash position; earnings before interest and taxes; earnings before interest, taxes, depreciation and amortization; earnings per share; economic profit; economic value added; equity or stockholder's equity; market share; net income; net profit; net sales; operating earnings; operating income; profit before tax; ratio of debt to debt plus equity; ratio of operating earnings to capital spending; sales growth; return on net assets; or total return to stockholders. The performance goals may differ from participant to participant and from Award to Award and may be used to measure the performance of our business as a whole or one of our business units and may be measured relative to a peer group or index.

Grants to Non-Employee Directors

The Incentive Plan provides for automatic, nondiscretionary awards to non-employee directors. The automatic grants do not limit the ability of the administrator to grant other discretionary awards to non-employee directors under the Incentive Plan and the administrator has the discretion to change the terms of the automatic grants prospectively.

Initial Equity Grant

Each non-employee director will be automatically granted a nonstatutory stock option to purchase 40,000 shares when he or she first becomes a member of our Board of Directors. The term of such options shall not exceed ten years. The option grants vest over a four-year period, with one-eighth of shares subject to the option vesting six months after the date of grant and the remaining shares vesting ratably each month thereafter, subject to the non-employee director continuing to serve through each applicable vesting date.

Annual Equity Grant

Each non-employee director shall automatically receive an annual award of restricted stock units on October 1 of each year. The number of restricted stock units subject to the award will be determined in the sole discretion of our Board of Directors on or prior to the award becoming effective on the applicable October 1 grant date. For a description of the current non-employee director annual equity grants, see "Executive Compensation—Compensation of Directors." The restricted stock unit grants vest in full at the end of a one-year period, subject to the non-employee director continuing to serve through each applicable vesting date. If the non-employee discontinues service prior to the vesting of any restricted stock unit grant, the administrator may, in its discretion, permit such grant to vest pro rata for the portion of the year during which such director served.

Transferability of Awards

Awards granted under the Incentive Plan are generally not transferable, and all rights with respect to an Award granted to a participant generally will be available during a participant's lifetime only to the participant or such participant's estate.

Change of Control

The terms of the Incentive Plan provide that all outstanding equity awards may vest upon a "double-trigger" termination in the event of a change of control, as described under the "Executive Compensation—Outstanding Equity Awards at Fiscal 2011 Year-End" table.

Amendment and Termination of the Incentive Plan

The administrator will have the authority to amend, alter, suspend or terminate the Incentive Plan, except that stockholder approval will be required for any amendment to the Incentive Plan to the extent required by any applicable laws. No amendment, alteration, suspension or termination of the Incentive Plan will impair the rights of any participant, unless mutually agreed otherwise between the participant and the administrator and which agreement must be in writing and signed by the participant and us. The Incentive Plan will terminate in March 2016, unless our Board of Directors terminates it earlier.

Number of Awards Granted to Employees, Consultants, and Directors

The number of Awards that an employee, director or consultant may receive under the Incentive Plan is in the discretion of the administrator and therefore cannot be determined in advance.

The following table sets forth (i) the aggregate number of shares of common stock subject to options granted under the Incentive Plan during the last fiscal year, (ii) the average per share exercise price of such options, (iii) the aggregate number of shares issued pursuant to awards of restricted stock granted under the Incentive Plan during the last fiscal year, and (iv) the dollar value of such shares based on the closing price per share on the grant dates.

Named Executive Officers:

Harold Hughes

Satish Rishi

Thomas R. Lavelle

Sharon E. Holt

Martin Scott

All executive officers, as a group

All directors who are not executive officers, as a group

All employees who are not executive officers, as a group

Federal Tax Aspects

Nonstatutory Stock Options

No taxable income is reportable when a nonstatutory stock option with an exercise price equal to the fair market value of the underlying stock on the date of grant is granted to a participant. Upon exercise, the participant will recognize ordinary income in an amount equal to the excess of the fair market value (on the exercise date) of the shares purchased over the exercise price of the option. Any taxable income recognized in connection with an option exercise by an employee is subject to tax withholding by us. Any additional gain or loss recognized upon any later disposition of the shares would be capital gain or loss.

Incentive Stock Options

No taxable income is reportable when an incentive stock option is granted or exercised (except for purposes of the alternative minimum tax, in which case taxation is the same as for nonstatutory stock options). If the participant exercises the option and then later sells or otherwise disposes of the shares more than two years after the grant date and more than one year after the exercise date, the difference between the sale price and the exercise price will be taxed as capital gain or loss. If the participant exercises the option and then later sells or otherwise disposes of the shares before the end of the two- or one-year holding periods described above, he or she generally will have ordinary income at the time of the sale equal to the fair market value of the shares on the exercise date (or the sale price, if less) minus the exercise price of the option.

Stock Appreciation Rights

No taxable income is reportable when a stock appreciation right with an exercise price equal to the fair market value of the underlying stock on the date of grant is granted to a participant. Upon exercise, the participant will recognize ordinary income in an amount equal to the amount of cash received and the fair market value of any shares received. Any additional gain or loss recognized upon any later disposition of the shares would be capital gain or loss.

Restricted Stock, Restricted Stock Units, Performance Units and Performance Shares

A participant generally will not have taxable income at the time an Award of restricted stock, restricted stock units, performance shares or performance units are granted. Instead, he or she will recognize ordinary income in the first taxable year in which his or her interest in the shares underlying the Award becomes either (i) freely transferable or (ii) no longer subject to substantial risk of forfeiture. However, the recipient of a restricted stock Award may elect to recognize income at the time he or she receives the Award in an amount equal to the fair market value of the shares underlying the Award (less any cash paid for the shares) on the date the Award is granted.

Tax Effect for Rambus

We generally will be entitled to a tax deduction in connection with an Award under the Incentive Plan in an amount equal to the ordinary income realized by a participant and at the time the participant recognizes such income (for example, the exercise of a nonstatutory stock option). Special rules limit the deductibility of certain compensation paid to our Chief Executive Officer, Chief Financial Officer and to each of our three highest compensated officers. Under Section 162(m) of the Internal Revenue Code, no deduction is allowed for certain compensation with respect to any of these specified executives only to the extent that the amount for the taxable year for such executive exceeds $1,000,000. However, the deductibility of such compensation in excess of $1,000,000 may not be limited under Section 162(m) and the applicable treasury regulations if such compensation qualifies as performance based.

Section 409A

Section 409A of the Code provides certain new requirements on non-qualified deferred compensation arrangements. These include new requirements with respect to an individual's election to defer compensation and the individual's selection of the timing and form of distribution of the deferred compensation. Section 409A also generally provides that distributions must be made on or following the occurrence of certain events (e.g., the individual's separation from service, a predetermined date, or the individual's death). Section 409A imposes restrictions on an individual's ability to change his or her distribution timing or form after the compensation has

been deferred. For certain individuals who are officers, Section 409A requires that such individual's distribution commence no earlier than six months after such officer's separation from service.

Awards granted under the Incentive Plan with a deferral feature will be subject to the requirements of Section 409A. If an Award is subject to and fails to satisfy the requirements of Section 409A, the recipient of that award may recognize ordinary income on the amounts deferred under the Award, to the extent vested, which may be prior to when the compensation is actually or constructively received. Also, if an Award that is subject to Section 409A fails to comply with Section 409A's provisions, Section 409A imposes an additional 20% federal income tax on compensation recognized as ordinary income, as well as interest on such deferred compensation. In addition, certain states such as California have adopted similar provisions.

The foregoing is only a summary of the effect of federal income taxation upon participants and us with respect to the grant and exercise of awards under the Incentive Plan. It does not purport to be complete, and does not discuss the tax consequences of a participant's death or the provisions of the income tax laws of any municipality, state or foreign country in which the participant may reside.

Vote Required; Recommendation of the Board of Directors

Our Board of Directors recommends that you vote "FOR" the Amendment to the 2006 Employee Stock Purchase Plan and the increase to the number of shares reserved for issuance thereunder.

Summary of the 2006 Employee Stock Purchase Plan

The following is a summary of the principal features of the Purchase Plan and its operation. The summary is qualified in its entirety by reference to the Purchase Plan, as amended giving effect to this Proposal Four, set forth in Appendix B.

General

The Purchase Plan was adopted by the Board of Directors in March 2006, and approved by our stockholders at the 2006 Annual Meeting. The purpose of the Purchase Plan is to provide employees with an opportunity to purchase shares of our Common Stock through payroll deductions.

Administration

The Board of Directors or a committee appointed by the Board of the Directors administers the Purchase Plan. All questions of interpretation or application of the Purchase Plan are determined by the administrator and its decisions are final, conclusive and binding upon all participants.

Eligibility

Each of our employees or the employees of our designated subsidiaries who is a common law employee and whose customary employment with us or one of our designated subsidiaries is at least twenty hours per week and more than

five months in a calendar year is eligible to participate in the Purchase Plan subject to the laws in which our designated subsidiaries operate; except that no employee shall be granted an option under the Purchase Plan (i) to the extent that, immediately after the grant, such employee would own 5% or more of the total combined voting power of all classes of our capital stock or the capital stock of one of the designated subsidiaries, or (ii) to the extent that his or her rights to purchase stock under all of our employee stock purchase plans accrues at a rate which exceeds $25,000 worth of stock (determined at the fair market value of the shares at the time such option is granted) for each calendar year.

Offering Period

Each offering period under the Purchase Plan will expire on the earliest to occur of (i) the completion of the purchase of shares on the last exercise date occurring within twenty-four months of the offering date of such option, (ii) such shorter option period as may be determined by the administrator, or (iii) the date on which an eligible employee ceases to be a participant under the Purchase Plan. Each offering period will generally consist of a number of purchase periods after which shares will be purchased. Until the administrator determines otherwise, a purchase period will be approximately six months and run from May 1 to November 1 and November 1 to May 1. To participate in the Purchase Plan, an eligible employee must authorize payroll deductions pursuant to the Purchase Plan. Such payroll deductions may not be less than 1% and may not exceed 15% of a participant's compensation during the offering period. Once an employee becomes a participant in the Purchase Plan, the employee automatically will participate in each successive offering period until the employee withdraws from the Purchase Plan or the employee's employment with us or the designated subsidiaries terminates. At the beginning of each offering period, each participant automatically is granted an option to purchase shares of our Common Stock. The option expires at the end of the offering period or upon termination of employment, whichever is earlier, but is exercised at the end of each purchase period to the extent of the payroll deductions accumulated during such purchase period.

Purchase Price

Shares of our Common Stock may be purchased under the Purchase Plan at a purchase price not less than 85% of the lesser of the fair market value of the common stock on (i) the first day of the offering period, or (ii) the last day of the purchase period. The fair market value of our Common Stock on any relevant date will be the closing price per share as reported on the Nasdaq Stock Market, or the mean of the closing bid and asked prices, if no sales were reported, as quoted on such exchange or reported in The Wall Street Journal.

Payment of Purchase Price; Payroll Deductions

The purchase price of the shares is accumulated by payroll deductions throughout each purchase period. The number of shares of our Common Stock that a participant may purchase in each purchase period during an offering period will be determined by dividing the total amount of payroll deductions withheld from the participant's compensation during that purchase period by the purchase price; provided, however, that a participant may not purchase more than 5,000 shares each purchase period. During the offering period, a participant may discontinue his or her participation in the Purchase Plan, and may decrease or increase the rate of payroll deductions in an offering period within limits set by the administrator; provided, however, that unless the administrator determines otherwise, a participant may reduce, but not increase his or her contributions during a purchase period for that purchase period.

All payroll deductions made for a participant are credited to the participant's account under the Purchase Plan, are withheld in whole percentages only and are included with our general funds. Funds received by us pursuant to exercises under the Purchase Plan are also used for general corporate purposes. A participant may not make any additional payments into his or her account.

Withdrawal

Generally, a participant may withdraw from an offering period at any time by written or electronic notice without affecting his or her eligibility to participate in future offering periods. However, once a participant withdraws from a particular offering period, that participant may not participate again in the same offering period. To participate in a subsequent offering period, the participant must deliver to us a new subscription agreement.

Termination of Employment

Upon termination of a participant's employment for any reason, including disability or death, he or she will be deemed to have elected to withdraw from the plan and the payroll deductions credited to the participant's account (to the extent not used to make a purchase of our Common Stock) will be returned to him or her or, in the case of death, to the person or persons entitled thereto as provided in the Purchase Plan, and such participant's option will automatically be terminated.

Adjustments upon Changes in Capitalization, Dissolution, Liquidation,  or Change of Control

Changes in Capitalization

Subject to any required action by our stockholders, the number of shares reserved under the Purchase Plan, the maximum number of shares that may be purchased during any purchase period, as well as the price per share of common stock covered by each option under the Purchase Plan which

has not yet been exercised shall be proportionately adjusted for any increase or decrease in the number of issued shares of common stock resulting from any dividend or other distribution, recapitalization, stock split, reverse stock split, reorganization, merger, consolidation, split-up, spin-off, combination, repurchase or exchange.

Dissolution or Liquidation

In the event of our proposed dissolution or liquidation, the administrator shall shorten any purchase periods and offering periods then in progress by setting a new exercise date and any offering periods shall end on the new exercise date. The new exercise date shall be prior to the dissolution or liquidation. If the administrator shortens any purchase periods and offering periods then in progress, the administrator shall notify each participant in writing, at least ten business days prior to the new exercise date, that the exercise date has been changed to the new exercise date and that the option will be exercised automatically on the new exercise date, unless the participant has already withdrawn from the offering period.

Change of Control

In the event of any "change of control," as defined in the Purchase Plan, each option under the Purchase Plan shall be assumed or an equivalent option shall be substituted by such successor corporation or a parent or subsidiary of such successor corporation. In the event the successor corporation refuses to assume or substitute for the options, the administrator shall shorten any purchase periods and offering periods then in progress by setting a new exercise date and any offering periods shall end on the new exercise date. The new exercise date shall be prior to the merger or change of control. If the administrator shortens any purchase periods and offering periods then in progress, the administrator shall notify each participant in writing, at least ten business days prior to the new exercise date, that the exercise date has been changed to the new exercise date and that the option will be exercised automatically on the new exercise date, unless the participant has already withdrawn from the offering period.

Amendment or Termination

Our administrator may at any time terminate or amend the Purchase Plan including the term of any offering period then outstanding. Generally, no such termination can adversely affect options previously granted.

Number of Shares Purchased by Certain Individuals and Groups

Given that the number of shares that may be purchased under the Purchase Plan is determined, in part, based on the Common Stock's market value at the beginning and end of each Offering Period (or upon a purchase date within an Offering Period) and given that participation in the Purchase Plan is voluntary on the part of employees, the actual number of shares that may be purchased by any individual is not determinable.

For illustrative purposes, the following table sets forth (a) the number of shares of Common Stock that were purchased under the Purchase Plan during 2011 by our named executive officers, our executive officers as a group, and by all employees, and (b) the weighted average per share purchase price paid for such shares by each such group.

Named Executive Officers:

Harold Hughes

Satish Rishi

Thomas R. Lavelle

Sharon E. Holt

Martin Scott

All executive officers, as a group

All employees who are not executive officers, as a group

Federal Tax Aspects

The Purchase Plan, and the right of participants to make purchases thereunder, is intended to qualify under the provisions of Sections 421 and 423 of the Code. Under these provisions, no income will be taxable to a participant until the shares purchased under the Purchase Plan are sold or otherwise disposed of. Upon sale or other disposition of the shares, the participant will generally be subject to tax in an amount that depends upon the holding period. If the shares are sold or otherwise disposed of more than two years from the first day of the applicable offering period and one year from the applicable date of purchase, the participant will recognize ordinary income measured as the lesser of (i) the excess of the fair market value of the shares at the time of such sale or disposition over the purchase price, or (ii) an amount equal to 15% of the fair market value of the shares as of the first day of the applicable offering period. Any additional gain will be treated as long-term capital gain. If the shares are sold or otherwise disposed of before the expiration of these holding periods, the participant will recognize ordinary income generally measured as the excess of the fair market value of the shares on the date the shares are purchased over the purchase price. Any additional gain or loss on such sale or disposition will be long-term or short-term capital gain or loss, depending on how long the shares have been held from the date of purchase. We generally are not entitled to a deduction for amounts taxed as ordinary income

or capital gain to a participant except to the extent of ordinary income recognized by participants upon a sale or disposition of shares prior to the expiration of the holding periods described above.

The foregoing is only a summary of the effect of federal income taxation upon participants and us with respect to the grant and exercise of awards under the Purchase Plan. It does not purport to be complete, and does not discuss the tax consequences of a participant's death or the provisions of the income tax laws of any municipality, state or foreign country in which the participant may reside.

Voting Required; Recommendation of the Board of Directors

Our Board of Directors recommends that you vote "FOR" the approval of the Exchange Program for our employees.

Reasons for the Exchange Program

Our Board of Directors believes the Exchange Program is an important component in our strategy to align employee and stockholder interests through our equity compensation practices because it will permit us to:

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provide renewed incentives for the employees who participate in the Exchange Program by issuing them new stock options that will vest over a period of time following the exchange date if they remain employed with us. Providing renewed incentives to our employees is the primary purpose of the Exchange Program and we believe the Exchange Program will enable us to enhance long-term stockholder value by aligning the interests of our employees more fully with the interests of our stockholders;

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meaningfully reduce our total number of shares subject to outstanding equity awards, or "overhang," represented by outstanding stock options that have high exercise prices and may no longer incentivize their holders to remain as our employees. Keeping these stock options outstanding does not serve the interests of our stockholders and does not provide the benefits intended by our equity compensation program. By replacing the surrendered Eligible Options with a lesser number of new options, our overhang will be decreased. The overhang represented by the sstock options issued pursuant to the Exchange Program will reflect an appropriate balance between the goals for our equity compensation program and our interest in minimizing our overhang and the dilution of our stockholders' interests; and

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recapture value from compensation costs that we already are incurring with respect to outstanding stock options. These stock options were granted at the then fair market value of our common stock. Under applicable accounting rules, we will have to recognize approximately $189.0 million in stock-based compensation expense related to these stock options, of which $153.2 million has already been expensed as of December 31, 2011 and $35.8 million will continue to be obligated to expense, even if these stock options are never exercised because the majority remain underwater. As of March 1, 2012, the fair value associated with outstanding Eligible Options was approximately $100.0 million. We believe it is not an efficient use of our resources to recognize compensation expense on equity awards that do not provide value to our employees. By replacing stock options that have little or no retention or incentive value with equity awards that will provide both retention and incentive value, we will be making efficient use of our resources.

Eligibility of Stock Options for the Exchange Program

Generally, stock options will be eligible for exchange in the Exchange Program if:

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the stock option's exercise price exceeds $14.50 (measured as of the start date of the Exchange Program).

Our intent in using this eligibility threshold is to ensure that only outstanding stock options that are appropriately underwater are eligible for the Exchange Program.

As of March 1, 2012, stock options to purchase approximately 16.4 million shares of our common stock were outstanding under the Plan. For example, if we were to start the Exchange Program on March 1, 2012, our common stock closed at $7.06 on March 1, 2012 and all stock options with an exercise price of $14.50 or above would be eligible for the Exchange Program. On March 1, 2012, the number of shares underlying eligible options with an exercise price of $14.50 or higher was 7.4 million shares.

In considering how best to continue to motivate, retain and reward our employees who have stock options that are underwater, we evaluated several alternatives, including the following:

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Increase Cash Compensation.    To replace the intended benefits of equity incentives, we would need to substantially increase long term retention-based cash compensation. These increases would substantially increase our compensation expense and reduce our cash position and cash flow from operations. In addition, these increases would not reduce our overhang.

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Grant Additional Equity Awards.    We also considered granting employees additional equity awards at current market prices. However, these additional grants would substantially increase our equity award overhang and the potential dilution to our stockholders and would increase our compensation expense accordingly.

Eligible Option Holders

The Exchange Program will be open to any stock option holder who:

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holds Eligible Options;

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is not a named executive officer, senior vice president, or member of our Board of Directors at the start of the Exchange Program; and

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at the start of the Exchange Program:

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is an employee in our U.S. locations; or

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is employed by or provides services to us or our subsidiaries, but only to the extent such stock option holders' participation is permitted by local laws.

We may, however, exclude otherwise eligible stock option holders in certain non-U.S. jurisdictions if local tax or securities laws or other considerations would make their participation illegal, infeasible or impractical. Any eligible employee who elects to participate in the Exchange Program but whose employment terminates for any reason prior to the grant of the new options will retain his or her Eligible Options subject to their existing terms and will not receive a new stock option under the Exchange Program.

Exchange Ratios

The Exchange Program will not be a one-for-one exchange. We intend to set the exchange ratios for our eligible employees so that the exchange will approximate a value-for-value exchange and so that any additional stock-based compensation charge we will incur will be minimized.

Eligible employees who participate in the Exchange Program, will receive a receive a new stock option for a lesser number of shares equal to (a) the number of shares underlying the stock option exchanged multiplied by (b) an exchange ratio set at a ratio to approximate a value-for-value exchange. The exact exchange ratio will be set by our Board of Directors prior to the start date of the Exchange Program.

The exchange ratios of surrendered Eligible Options to newly issued stock options for eligible employees will be established by grouping together Eligible Options with similar grant dates and assigning an appropriate exchange ratio to each grouping. The exchange ratios will be determined so that the total fair value of all newly issued options within each group will be equal to or slightly less than the total fair value of current option holdings.

We will compute the exchange ratios on an accounting value-for-value basis pursuant to Financial Accounting Standards Board Accounting Standards Codification Topic 718, Stock Compensation ("ASC 718") using the Black-Scholes valuation model. The calculation of fair value using the Black-Scholes model takes into account several variables, such as the volatility of our stock and the expected term of an award. As a result, the exchange ratios do not necessarily increase as the exercise price of the stock option increases. Setting the exchange ratios in this manner is intended to result in the issuance of new stock options that have a fair value approximately equal to the fair value of the surrendered eligible stock options that they replace. This approach will minimize any additional compensation cost that we must recognize on the stock options, other than immaterial compensation expense that might result from fluctuations in our stock price after the exchange ratios have been set but before the exchange is made.

Although the exchange ratios cannot be determined now, we can provide an example if we make certain assumptions regarding the start date of the offer, the fair value of the eligible stock options, and the fair market value of our Common Stock. For example, if we began the Exchange Program March 1, 2012, which would allow us to include in the Exchange Program a substantial percentage of our outstanding underwater stock options with an exercise price above $14.50 per share.

If, at the time we set the exchange ratios, the fair market value of our Common Stock was $8.00 per share, then based on the above method of determining the exchange ratio, the following exchange ratios would apply:

April 1, 2003 to May 31, 2003

June 1, 2003 to October 31, 2003

November 1, 2003 to April 30, 2004

May 1, 2004 to January 31, 2005

February 1, 2005 to February 14, 2006

February 15, 2006 to May 31, 2006

June 1, 2006 to January 31, 2009

September 1, 2009 through now

For purposes of example only, if a participating employee exchanged an Eligible Option for 1,000 shares with an exercise price of $14.75 per share granted on June 7, 2005 and the exchange ratio was one new stock option for every 3.75 shares covered by the surrendered Eligible Option, he or she would receive 266 new stock options in exchange for the surrendered stock option (1,000 divided by 3.75). If the participating employee also exchanged another Eligible Option for 2,000 shares with an exercise price of $20.16 per share granted on December 1, 2010 and the exchange ratio was one new stock option for every 2 shares covered by the surrendered Eligible Option, he or she would receive 1,000 new stock options in exchange for the surrendered eligible award (2,000 divided by 2).

Continuing this example, if we assume that all currently eligible stock options remain outstanding and the stock option holders remain eligible to participate, the following table summarizes information regarding the eligible stock options that would be granted in the exchange:

Apr 1, 2003 to May 31, 2003

Jun 1, 2003 to Oct 31, 2003

Nov 1, 2003 to Apr 30, 2004

May 1, 2004 to Jan 31, 2005

Feb 1, 2005 to Feb 14, 2006

Feb 15, 2006 to May 31, 2006

Jun 1, 2006 to Jan 31, 2009

Sep 1, 2009 through now

Total

Participation in the Exchange Program

Eligible employees will have an election period of at least 20 business days from the start of the Exchange Program in which to determine whether they wish to participate.

Because the decision whether to participate in the Exchange Program is completely voluntary, we are not able to predict which or how many employees will elect to participate, how many Eligible Options will be surrendered for exchange, and therefore how many new stock options may be issued.

As indicated above, executive officers and members of our Board of Directors are not eligible to participate in the Exchange Program.

Election to Exchange Underwater Options

Eligible employees may decide to participate in the Exchange Program on a grant-by-grant basis. This means that eligible employees may elect to tender any or all of their Eligible Options. However, if an eligible employee elects to tender any shares subject to a particular Eligible Option in the Exchange Program, then the eligible employee must tender all shares subject to that particular Eligible Option.

Term and Vesting of New Options

None of the new stock options issued in the Exchange Program will be vested on the date of grant, but will become vested on the basis of the participating employee's continued services with us or any or our subsidiaries. All new stock options will be subject to a three year vesting schedule. The rate at which the new stock options will vest be as follows:

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1/3 of the new stock option will vest on the one year anniversary of the exchange date; and

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2/3 of the new stock option will vest over the next two years in equal monthly installments thereafter on the monthly anniversary of the exchange date.

Each new stock option will have a new term equal to the longer of five years or the original term of the Eligible Option it replaces, subject to earlier termination in the event of the employee's termination of employment with us or one of our subsidiaries.

Terms of New Options

Each new stock option issued in the Exchange Program will represent a right to purchase shares of our Common Stock on a specified future date at the fair market value of our Common Stock on the date of issuance. All new options granted pursuant to the Exchange Program will retain the status as the Eligible Option it replaces to the extent permissible under the law (e.g., if an Eligible Option was intended to be an incentive stock option within the meaning of Section 422 of the Internal Revenue Code of 1986, as amended, then the new option will be an incentive stock option to the extent permissible under the law). Except for the different exercise price, the vesting schedule described above, and the new term described above, all other terms and conditions of the new stock options issued in the Exchange Program will be substantially the same as those that apply to Eligible Options granted previously, except that prior grants made from equity plans other the Incentive Plan, if any, will now be governed by the terms and conditions of the Incentive Plan.

Terms of the Exchange Program

While the terms of the Exchange Program are expected to be materially similar to the terms described in this proposal, we may find it necessary or appropriate to change the terms of the exchange program to take into account our administrative needs, local law requirements, accounting rules, company

policy decisions that make it appropriate to change the exchange program and the like. For instance, although we will not allow stock options below an exercise price which is at least $14.50, we may decide to exclude stock options granted below a higher price-point. As another example, we may alter the method of determining exchange ratios if we decide that there is a more efficient and appropriate way to set the ratios while still continuing to limit incremental compensation expense.

It is also possible that certain terms of the Exchange Program may need to be modified in countries outside the United States in order to comply with local requirements, or for tax, accounting or administrative reasons and/or that the exchange program may not be implemented in certain jurisdictions outside the United States if local law, expense, complexity, administrative burden or similar considerations would make it illegal, infeasible or impractical to do so. Additionally, we may decide not to implement the Exchange Program even if stockholder approval of the exchange program is obtained or may amend or terminate the exchange program once it is in progress if our stock price increases significantly or other factors that may render the Exchange Program detrimental to the Company and the long term interests of the stockholders. The final terms of the Exchange Program will be described in an offer to exchange that will be filed with the SEC. Although we do not anticipate that the staff of the SEC will require us to materially modify the terms of the exchange program, it is possible that we may need to alter the terms of the Exchange Program to comply with comments from the staff.

U.S. Tax Consequences

The following is a summary of the anticipated material United States federal income tax consequences of participating in the Exchange Program. A more detailed summary of the applicable tax considerations to participants will be provided in the offer to exchange. The tax consequences of the program are not entirely certain, however, and the Internal Revenue Service is not precluded from adopting a contrary position, and the law and regulations themselves are subject to change. We believe the exchange of Eligible Options for new options pursuant to the program should be treated as a non-taxable exchange and neither we nor any of our eligible employees should recognize any income for U.S. federal income tax purposes upon the surrender of eligible options and the grant of new options. If the option Exchange Program is open for 30 days or more, Eligible Options that were intended to be incentive stock options will be considered "modified," which will result in a deemed re-grant of the Eligible Option, whether or not they were exchanged. This would mean that for purposes of the incentive stock option rules the holding period measured from the date of grant would restart and the

option holder would not receive any credit for the time from the original grant date of the eligible option.

Financial Accounting Consequences

We account for stock-based compensation in accordance with ASC 718. Under ASC 718, to the extent the fair value of each award of stock options granted pursuant to the option exchange program exceeds the fair value of the surrendered options at the modification date, such excess is considered incremental compensation. This excess, in addition to any remaining unrecognized expense for the Eligible Options surrendered in exchange for the new options, will be recognized by us as an expense for compensation. This expense will be recognized ratably over the vesting period of the new options in accordance with the requirements of ASC 718. In the event that any awards of new options are forfeited prior to their vesting due to termination of an employee's service, the compensation cost related to the forfeited stock options will not be recognized.

Impact of Exchange Program on our Stockholders

We are unable to predict the precise impact of the Exchange Program on our stockholders because we are unable to predict how many or which employees will exchange their Eligible Options. The Exchange Program is intended to restore competitive and appropriate equity incentives for our eligible employees, reduce our existing overhang and recapture value for compensation expense already being incurred.

Our History with PricewaterhouseCoopers

Principal Accountant Fees and Services

The aggregate fees billed for professional accounting services by PricewaterhouseCoopers LLP for the fiscal years ended December 31, 2011, and December 31, 2010 are as follows:

Audit Fees(1)

Audit-Related Fees(2)

Tax Fees(3)

All Other Fees(4)

Total Fees

Policy on Audit Committee Pre-Approval of Audit and the Permissible Non-Audit Services of Independent Registered Public Accounting Firm

Independence of PricewaterhouseCoopers LLP

The Audit Committee has determined that the accounting advice and tax services provided by PricewaterhouseCoopers LLP are compatible with maintaining PricewaterhouseCoopers LLP's independence.

Vote Required

The affirmative vote of a majority of the shares present and entitled to vote at the Annual Meeting will be required to ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm.

The Board unanimously recommends that you vote "FOR" the ratification of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2012.

Equity Compensation Plans Approved by Security Holders(1)

Equity Compensation Plans Not Approved by Security Holders(2)

Total

FMR LLC(2)

82 Devonshire Street

Boston, MA 02109

PRIMECAP Manangement Company(3)

225 South Lake Ave., #400

Pasadena, CA 91101

Harold Hughes

Satish Rishi(4)

Thomas Lavelle

Sharon E. Holt

Martin Scott

J. Thomas Bentley(5)

Sunlin Chou(6)

P. Michael Farmwald(7)

Penelope A. Herscher(8)

David Shrigley

Abraham Sofaer

Eric Stang(9)