Exhibit 10.1


 Exhibit 10.1 

Citibank, N.A. 
 388 Greenwich
Street 
 New York, NY 10013 

March 5, 2018 
  

	To:	Rambus, Inc. 

 1050 Enterprise Way, Suite 700 

Sunnyvale, California 94089 

Attention: Treasurer 
 Telephone
No.:    (408) 462-8000 
 Facsimile No.:     (408) 462-8001 
  

	Re:	Master Confirmation—Uncollared Accelerated Share Repurchase 

 This master confirmation
(this “Master Confirmation”), dated as of March 5, 2018, is intended to set forth certain terms and provisions of certain Transactions (each, a “Transaction”) entered into from time to time between Citibank,
N.A. (“Dealer”), and Rambus, Inc., a Delaware corporation (“Counterparty”). This Master Confirmation, taken alone, is neither a commitment by either party to enter into any Transaction nor evidence of a Transaction.
The additional terms of any particular Transaction shall be set forth in a Supplemental Confirmation in the form of Schedule A hereto (a “Supplemental Confirmation”), which shall reference this Master Confirmation and supplement,
form a part of, and be subject to this Master Confirmation. This Master Confirmation and each Supplemental Confirmation together shall constitute a “Confirmation” as referred to in the Agreement specified below. 

The definitions and provisions contained in the 2002 ISDA Equity Derivatives Definitions (the “Equity Definitions”), as
published by the International Swaps and Derivatives Association, Inc., are incorporated into this Master Confirmation. This Master Confirmation and each Supplemental Confirmation evidence a complete binding agreement between Counterparty and Dealer
as to the subject matter and terms of each Transaction to which this Master Confirmation and such Supplemental Confirmation relate and shall supersede all prior or contemporaneous written or oral communications with respect thereto. 

This Master Confirmation and each Supplemental Confirmation supplement, form a part of, and are subject to an agreement in the form of the
2002 ISDA Master Agreement (the “Agreement”) as if Dealer and Counterparty had executed the Agreement on the date of this Master Confirmation, without any Schedule, but with the elections set forth in this Master Confirmation,
including: 
 (i) The election of New York law as the governing law (without reference to its choice of law provisions). 

(ii) The election that subparagraph (ii) of Section 2(c) will not apply to the Transactions. 

(iii) [Reserved.] 

(iv) The election that the “Cross Default” provisions of Section 5(a)(vi) of the Agreement shall apply to
Dealer, with a “Threshold Amount” of 3% of shareholders’ equity for Dealer (provided that (a) the phrase “, or becoming capable at such time of being declared,” shall be deleted from clause (1) of such
Section 5(a)(vi) of the Agreement, (b) “Specified Indebtedness” shall have the meaning specified in Section 14 of the Agreement, except that such term shall not include obligations in respect of deposits received in the ordinary
course of Dealer’s banking business and (c) the following sentence shall be added to the end thereof: “Notwithstanding the foregoing, an Event of Default shall not occur under either (1) or (2) above if (a) the event or
condition referred to in (1) or the failure to pay referred to in (2) is caused by an error or omission of an administrative or operational nature, (b) funds were available to Dealer to enable it to make the relevant payment when due,
and (c) such payment is made within three Local Business Days after notice of such failure is given by Counterparty.”). 

(v) “Affiliate” will have the meaning specified in Section 14 of the Agreement, except that for purposes of
Section 3(c) of the Agreement as set forth in clause (iii) above, “Affiliate” means, with respect to any person, any entity controlled, directly or indirectly by such person. For this purpose, “control” means ownership
of a majority of the voting power of the entity or person. 






 (vi) For purposes of Section 3(f) of the Agreement, Dealer makes the
following representation: 
 It is a U.S. person, and it is a national banking association organized under the laws of the
United States. 
 (vii) For purposes of Section 3(f) of the Agreement, Counterparty makes the following representation:

 It is a U.S. person, and it is a corporation organized under the State of Delaware. 

(viii) Each party agrees to deliver a complete and accurate United States Internal Revenue Service Form W-9 to Dealer upon execution of this Agreement. 
 The Transactions shall be the sole Transactions under
the Agreement. If there exists any ISDA Master Agreement between Dealer and Counterparty or any confirmation or other agreement between Dealer and Counterparty pursuant to which an ISDA Master Agreement is deemed to exist between Dealer and
Counterparty, then notwithstanding anything to the contrary in such ISDA Master Agreement, such confirmation or agreement or any other agreement to which Dealer and Counterparty are parties, the Transactions shall not be considered Transactions
under, or otherwise governed by, such existing or deemed ISDA Master Agreement, and the occurrence of any Event of Default or Termination Event under the Agreement with respect to either party or any Transaction shall not, by itself, give rise to
any right or obligation under any such other agreement or deemed agreement. Notwithstanding anything to the contrary in any other agreement between the parties or their Affiliates, the Transactions shall not be “Specified Transactions” (or
similarly treated) under any other agreement between the parties or their Affiliates. 
 All provisions contained or incorporated by
reference in the Agreement shall govern this Master Confirmation and each Supplemental Confirmation except as expressly modified herein or in the related Supplemental Confirmation. 

If, in relation to any Transaction to which this Master Confirmation and a Supplemental Confirmation relate, there is any inconsistency
between the Agreement, this Master Confirmation, such Supplemental Confirmation and the Equity Definitions, the following will prevail for purposes of such Transaction in the order of precedence indicated: (i) such Supplemental Confirmation;
(ii) this Master Confirmation; (iii) the Equity Definitions; and (iv) the Agreement. 
 1. Each Transaction constitutes a Share
Forward Transaction for the purposes of the Equity Definitions. Set forth below are the terms and conditions that, together with the terms and conditions set forth in the Supplemental Confirmation relating to any Transaction, shall govern such
Transaction. 
 General Terms. 
  

					
		 	Trade Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	Buyer:	  	Counterparty
			
		 	Seller:	  	Dealer
			
		 	Shares:	  	The common stock of Counterparty, par value USD 0.001 per share (Exchange symbol “RMBS”) (“Common Stock”).
			
		 	Exchange:	  	The NASDAQ Global Select Market
			
		 	Related Exchange(s):	  	All Exchanges; provided that Section 1.26 of the Equity Definitions shall be amended to add the words “United States” before the word “exchange” in the tenth line of that
Section.


  
 2 








					
		 	Prepayment/Variable Obligation:	  	Applicable
			
		 	Prepayment Amount:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	Prepayment Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
		
	 Valuation.
	  	
			
		 	VWAP Price:	  	For any Exchange Business Day, the volume-weighted average price at which the Shares trade as reported in the composite transactions for United States exchanges and quotation systems, during the regular trading session for the
Exchange on such Exchange Business Day, excluding (i) trades that do not settle regular way, (ii) opening (regular way) reported trades in the consolidated system on such Exchange Business Day, (iii) trades that occur in the last ten
minutes before the scheduled close of trading on the Exchange on such Exchange Business Day and ten minutes before the scheduled close of the primary trading in the market where the trade is effected, and (iv) trades on such Exchange Business
Day that do not satisfy the requirements of Rule 10b-18(b)(3) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as published by Bloomberg at 4:15 p.m. New York time
(or 15 minutes following the end of any extension of the regular trading session) on such Exchange Business Day, on Bloomberg page “RMBS <Equity> AQR_SEC” (or any successor thereto), or if such price is not so reported on such
Exchange Business Day for any reason or is, in the Calculation Agent’s good faith and commercially reasonable determination, erroneous, such VWAP Price shall be as determined in good faith and in a commercially reasonable manner by the
Calculation Agent (all such trades other than any trades described in clauses (i) to (iv) above, “Rule 10b-18 Eligible Transactions”); provided that the first trade in the Shares
during the regular trading session on the Exchange (even if such trade is reported on such Bloomberg Page) shall be excluded from the VWAP Price for such Exchange Business Day.
			
		 	Forward Price:	  	For each Transaction, the arithmetic average of the VWAP Prices for all of the Exchange Business Days in the Calculation Period for such Transaction, subject to “Valuation Disruption” below.
			
		 	Forward Price Adjustment Amount:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	Calculation Period:	  	For each Transaction, the period from, and including, the Calculation Period Start Date for such Transaction to, and including, the Termination Date for such Transaction.
			
		 	Calculation Period Start Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation.


  
 3 








					
		 	Termination Date:	  	For each Transaction, the Scheduled Termination Date for such Transaction; provided that in no event shall the Scheduled Termination Date be postponed to a date later than the Final Termination Date; provided further
that Dealer shall have the right to designate any Exchange Business Day on or after the First Acceleration Date to be the Termination Date for the entire Transaction (the “Accelerated Termination Date”) by delivering notice to
Counterparty of any such designation prior to 6:00 p.m. (New York City time) on the third Exchange Business Day immediately following the designated Accelerated Termination Date; provided further that if Dealer expects that the Number of
Shares to be Delivered will be a negative number as a result of any Acceleration prior to the Scheduled Termination Date, then Dealer shall use its reasonable efforts to provide, to the extent feasible, the Counterparty notice of any such
Acceleration prior to any such proposed Acceleration.
			
		 	Scheduled Termination Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation, subject to postponement as provided in “Valuation Disruption” below; provided that in no event shall the Scheduled Termination Date be
postponed to a date later than the Final Termination Date.
			
		 	Final Termination Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	First Acceleration Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	Valuation Disruption:	  	The definition of “Market Disruption Event” in Section 6.3(a) of the Equity Definitions is hereby amended by deleting the words “at any time during the one-hour period that
ends at the relevant Valuation Time, Latest Exercise Time, Knock-in Valuation Time or Knock-out Valuation Time, as the case may be” and inserting the words “at
any time on any Scheduled Trading Day during the Calculation Period or Settlement Valuation Period” after the word “material,” in the third line thereof.
			
		 		  	Section 6.3(d) of the Equity Definitions is hereby amended by deleting the remainder of the provision following the term “Scheduled Closing Time” in the fourth line thereof.
			
		 		  	Notwithstanding anything to the contrary in the Equity Definitions, if a Disrupted Day occurs (i) in the Calculation Period, the Calculation Agent may, in its good faith and commercially reasonable judgment, postpone the
Scheduled Termination Date by one Scheduled Trading Day for each Disrupted Day (provided that in no event shall the Scheduled Termination Date be postponed to a date later than the Final Termination Date), or (ii) in the Settlement
Valuation Period, the Calculation Agent may extend the Settlement Valuation Period. The Calculation Agent may also determine that (i) such Disrupted Day is a Disrupted Day in full, in which
case


  
 4 








					
		 		  	the VWAP Price for such Disrupted Day shall not be included for purposes of determining the Forward Price or the Settlement Price, as the case may be, or (ii) such Disrupted Day is a Disrupted Day only in part, in which case
the VWAP Price for such Disrupted Day shall be determined by the Calculation Agent based on Rule 10b-18 Eligible Transactions in the Shares on such Disrupted Day taking into account the nature and duration of
the relevant Market Disruption Event, and the weighting of the VWAP Price for the relevant Exchange Business Days during the Calculation Period or the Settlement Valuation Period, as the case may be, shall be adjusted in a commercially reasonable
manner by the Calculation Agent for purposes of determining the Forward Price or the Settlement Price, as the case may be, with such adjustments based on, among other factors, the duration of any Market Disruption Event and the volume, historical
trading patterns and price of the Shares. Any Disrupted Day resulting from a Regulatory Disruption shall be deemed to be a Disrupted Day in full. Any Exchange Business Day on which, as of the date hereof, the Exchange is scheduled to close prior to
its normal close of trading shall be deemed not to be an Exchange Business Day; if a closure of the Exchange prior to its normal close of trading on any Exchange Business Day is scheduled following the date hereof, then such Exchange Business Day
shall be deemed to be a Disrupted Day in full.
			
		 		  	If a Disrupted Day occurs during the Calculation Period for any Transaction or the Settlement Valuation Period for any Transaction, as the case may be, and each of the nine immediately following Scheduled Trading Days is a Disrupted
Day (a “Disruption Event”), then the Calculation Agent, in its good faith and commercially reasonable discretion, may deem such Disruption Event (and each consecutive Disrupted Day thereafter) to be a Potential Adjustment Event in
respect of such Transaction.
		
	 Settlement Terms.
	  	
			
		 	Settlement Procedures:	  	For each Transaction:
			
		 		  	 (i) if the Number of Shares to be Delivered for such Transaction is positive, Physical
Settlement shall be applicable to such Transaction; provided that the “Representation and Agreement” contained in Section 9.11 of the Equity Definitions shall be modified by excluding any representations therein relating to
restrictions obligations, limitations or requirements under applicable securities laws arising as a result of the fact that Buyer is the Issuer of the Shares; or

			
		 		  	 (ii)  if the Number of Shares to be Delivered for such Transaction is negative, then
Counterparty Settlement Provisions in Annex A hereto shall apply to such Transaction.



  
 5 








					
		 	Number of Shares to be Delivered:	  	For each Transaction, a number of Shares (rounded down to the nearest whole number) equal to (a)(i) the Prepayment Amount for such Transaction, divided by (ii)(A) the Forward Price for such Transaction minus
(B) the Forward Price Adjustment Amount for such Transaction, minus (b) the number of Initial Shares for such Transaction; provided that if the result of the calculation in clause (a)(ii) is equal to or less than the Floor
Price for such Transaction, then the Number of Shares to be Delivered for such Transaction shall be determined as if clause (a)(ii) were replaced with “(ii) the Floor Price for such Transaction”. For the avoidance of doubt, if the Forward
Price Adjustment Amount for any Transaction is a negative number, clause (a)(ii) of the immediately preceding sentence shall be equal to (A) the Forward Price for such transaction, plus (B) the absolute value of the Forward Price
Adjustment Amount.
			
		 	Floor Price:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	Excess Dividend Amount:	  	For the avoidance of doubt, all references to the Excess Dividend Amount shall be deleted from Section 9.2(a)(iii) of the Equity Definitions.
			
		 	Settlement Date:	  	For each Transaction, if the Number of Shares to be Delivered for such Transaction is positive, the date that is one Settlement Cycle immediately following the Termination Date for such Transaction (which as of the date hereof shall
be no more than three Clearance System Business Days following the Termination Date for such Transaction).
			
		 	Settlement Currency:	  	USD
			
		 	Initial Share Delivery:	  	For each Transaction, Dealer shall deliver a number of Shares equal to the Initial Shares for such Transaction to Counterparty on the Initial Share Delivery Date for such Transaction in accordance with Section 9.4 of the Equity
Definitions, with such Initial Share Delivery Date deemed to be a “Settlement Date” for purposes of such Section 9.4.
			
		 	Initial Share Delivery Date:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	Initial Shares:	  	For each Transaction, as set forth in the related Supplemental Confirmation.
		
	 Share Adjustments.
	  	
			
		 	Potential Adjustment Event:	  	In addition to the events described in Section 11.2(e) of the Equity Definitions, it shall constitute an additional Potential Adjustment Event if (x) the Scheduled Termination Date for any Transaction is postponed pursuant
to “Valuation Disruption” above (including, for the avoidance of doubt, pursuant to Section 7 hereof) (a “Valuation Disruption Postponement”), (y) a Regulatory Disruption as described in Section 7 occurs
or


  
 6 








					
		 		  	(z) a Disruption Event occurs; provided that the parties agree that (1) open market Share repurchases by Counterparty, if any, in accordance with Rule 10b-18 pursuant to
documentation entered into between Dealer and Counterparty shall not be considered a Potential Adjustment Event and (2) any repurchase of Shares pursuant to this Transaction shall not be considered a Potential Adjustment Event. In the case of
any event described in clause (x), (y) or (z) above occurs, the Calculation Agent may, in its commercially reasonable judgment, adjust any relevant terms of such Transaction as necessary to preserve as nearly as practicable the fair value of
such Transaction prior to such Valuation Disruption Postponement, Regulatory Disruption or Disruption Event, as the case may be.
			
		 	Cash Dividends:	  	The Counterparty will not declare nor pay any cash dividend or distribution (including any Extraordinary Dividend) (as defined under the Equity Definitions) during the Relevant Dividend Period (a “Cash
Dividend”).
			
		 	Consequences of Cash Dividend:	  	The declaration by the Issuer of any Cash Dividend, the ex-dividend date for which occurs or is scheduled to occur during the Relevant Dividend Period for any Transaction, shall, at
Dealer’s election in its commercially reasonable judgment, either (x) constitute an Additional Termination Event in respect of such Transaction, with Counterparty as the sole Affected Party and such Transaction as the sole Affected
Transaction or (y) result in an adjustment, by the Calculation Agent, to the Floor Price as the Calculation Agent determines in a good faith and commercially reasonable manner appropriate to account for the economic effect on such Transaction
of such Cash Dividend; provided, that Dealer’s election to treat such Cash Dividend as either an Additional Termination Event or an adjustment to the Floor Price (but not both) must be made within 30 days after the first public announcement of
such Cash Dividend.
			
		 	Method of Adjustment:	  	Calculation Agent Adjustment
			
		 	Relevant Dividend Period:	  	For each Transaction, the period from, and including, the Trade Date for such Transaction to, and including, the Relevant Dividend Period End Date for such Transaction.
			
		 	Relevant Dividend Period End Date:	  	For each Transaction, if the Number of Shares to be Delivered for such Transaction is negative, the last day of the Settlement Valuation Period; otherwise, the Termination Date for such Transaction.
		
	 Extraordinary Events.
	  	
			
		 	Consequences of Merger Events:	  	
			
		 	 (a) Share-for-Share:
	  	Cancellation and Payment
			
		 	 (b) Share-for-Other:
	  	Cancellation and Payment


  
 7 








					
		 	 (c) Share-for-Combined:
	  	Cancellation and Payment
			
		 	Tender Offer:	  	Applicable; provided that (a) Section 12.1(d) of the Equity Definitions shall be amended by replacing “10%” in the third line thereof with “20%,” (b) Section 12.1(l) of the Equity
Definitions shall be amended (i) by deleting the parenthetical in the fifth line thereof, (ii) by replacing “that” in the fifth line thereof with “whether or not such announcement” and (iii) by adding immediately
after the words “Tender Offer” in the fifth line thereof “, and any publicly announced change or amendment to such an announcement (including, without limitation, the announcement of an abandonment of such intention)” and
(c) Section 12.3(d) of the Equity Definitions shall each be amended by replacing each occurrence of the words “Tender Offer Date” by “Announcement Date.” If the Calculation Agent makes any adjustment to the terms of
this Transaction upon any particular Announcement Event of a Tender Offer, then the Calculation Agent shall make a further adjustment to the terms of the same Transaction upon any announcement regarding the abandonment of any such event that gave
rise to the original Announcement Event.
			
		 	Consequences of Tender Offers:	  	
			
		 	 (a) Share-for-Share:
	  	Modified Calculation Agent Adjustment
			
		 	 (b) Share-for-Other:
	  	Modified Calculation Agent Adjustment
			
		 	 (c) Share-for-Combined:
	  	Modified Calculation Agent Adjustment
		
		 	Any adjustment to the terms of any Transaction hereunder and the determination of any amounts due upon termination of any Transaction hereunder as a result of a Merger Event or Tender Offer shall be made without
duplication in respect of any prior adjustment hereunder (including, without limitation, any prior adjustment pursuant to Sections 10 and 11 below).
			
		 	Nationalization, Insolvency or Delisting:	  	Cancellation and Payment; provided that in addition to the provisions of Section 12.6(a)(iii) of the Equity Definitions, it shall also constitute a Delisting if the Exchange is located in the United States and the Shares
are not immediately re-listed, re-traded or re-quoted on any of the New York Stock Exchange, The NASDAQ Global Select Market or
The NASDAQ Global Market (or their respective successors); if the Shares are immediately re-listed, re-traded or re-quoted on any
such exchange or quotation system, such exchange or quotation system shall be deemed to be the Exchange.
			
		 	Additional Disruption Events:	  	
			
		 	 (a) Change in Law:
	  	Applicable; provided that (a) Section 12.9(a)(ii) of the Equity Definitions is hereby amended by (i) replacing the phrase “the interpretation” in the third line thereof with the phrase “, or
public announcement of, the formal or informal interpretation”, (ii) by replacing the word “Shares” where it appears in clause (X) thereof with the words “Hedge Positions” and (iii) by
immediately


  
 8 








					
		 		  	following the word “Transaction” in clause (X) thereof, adding the phrase “in the manner contemplated by the Hedging Party on the Trade Date”; and (b) Section 12.9(a)(ii) of the Equity
Definitions is hereby amended by replacing the parenthetical beginning after the word “regulation” in the second line thereof the words “(including, for the avoidance of doubt and without limitation, (x) any tax law or
(y) adoption or promulgation of new regulations authorized or mandated by existing statute)”. Notwithstanding anything to the contrary in the Equity Definitions, a Change in Law described in clause (Y) of Section 12.9(a)(ii) of
the Equity Definitions shall not constitute a Change in Law and instead shall constitute an Increased Cost of Hedging as described in Section 12.9(a)(vi) of the Equity Definitions.
			
		 	(b) Failure to Deliver:	  	Applicable
			
		 	(c) Insolvency Filing:	  	Applicable
			
		 	(d) Loss of Stock Borrow:	  	Applicable
			
		 	 Maximum Stock Loan Rate:
	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	 Hedging Party:
	  	Dealer, or an affiliate of Dealer that is involved in the hedging of the relevant Transaction.
			
		 	 Determining Party:
	  	Dealer
			
		 	(e) Hedging Disruption:	  	Applicable
			
		 	 Hedging Party:
	  	Dealer, or an affiliate of Dealer that is involved in the hedging of the relevant Transaction.
			
		 	 Determining Party:
	  	Dealer
			
		 	(f) Increased Cost of Hedging:	  	Not Applicable
			
		 	 Hedging Party:
	  	Dealer, or an affiliate of Dealer that is involved in the hedging of the relevant Transaction.
			
		 	 Determining Party:
	  	Dealer
			
		 	(g) Increased Cost of Stock Borrow:	  	Applicable
			
		 	 Initial Stock Loan Rate:
	  	For each Transaction, as set forth in the related Supplemental Confirmation.
			
		 	 Hedging Party:
	  	Dealer, or an affiliate of Dealer that is involved in the hedging of the relevant Transaction.
			
		 	 Determining Party:
	  	Dealer; provided that following any determination hereunder and upon written request by Counterparty, the Determining Party shall provide Issuer with a reasonably detailed explanation in writing of its determination
calculation including, where applicable, a description of the methodology and the basis for such determination calculation; provided further that in no event will Dealer be obligated to share with Issuer any proprietary or confidential data
or information or any proprietary or confidential models used by it.


  
 9 








					
		 	Hedging Adjustments:	  	For the avoidance of doubt, whenever the Calculation Agent is called upon to make an adjustment pursuant to the terms of this Master Confirmation or the Equity Definitions to take into account the effect of an event, the Calculation
Agent shall make such adjustment by reference to the effect of such event on Dealer, assuming that Dealer maintains a commercially reasonable Hedge Position.
			
		 	Non-Reliance/Agreements and Acknowledgements Regarding Hedging Activities/Additional Acknowledgements:	  	Applicable

  

	2.	Calculation Agent. Dealer; provided that, following the occurrence of an Event of Default pursuant to Section 5(a)(vii) of the Agreement with respect to which Dealer is the sole
Defaulting Party, Counterparty shall have the right to designate a nationally recognized third-party dealer in over-the-counter corporate equity derivatives to act as
the Calculation Agent with respect to the Transactions under this Master Confirmation. Following any determination or calculation by the Calculation Agent hereunder, upon a written request by Counterparty, the Calculation Agent will promptly (but in
any event no later than five (5) Exchange Business Days following receipt of such written request by Dealer) provide to Counterparty by e-mail to the e-mail address
provided by Counterparty in such written request a report (in a commonly used file format for the storage and manipulation of financial data) displaying in reasonable detail the basis for such determination or calculation, as the case may be, it
being understood that the Calculation Agent shall not be obligated to disclose any proprietary or confidential models or any other confidential or proprietary information, in each case, used by it for such determination or calculation. Whenever the
Calculation Agent is required to act or to exercise judgment in any way with respect to any Transaction hereunder, it will do so in good faith and in a commercially reasonable manner. 


 

	3.	Account Details. 

  

	 	(a)	Account for payments to Counterparty: 

 Bank: 

Wells Fargo Bank 
 400 Hamilton
Avenue 
 Palo Alto, CA 94301 

ABA#: 121000248 
 Acct No.:
4945059590 
 SWIFT Code WFBIUS6S 

Beneficiary: Rambus, Inc. 

Account for delivery of Shares to Counterparty: 

Dealer shall deliver the Shares to the Depository Trust Company’s DWAC system for acceptance by Computershare, as transfer agent for
Counterparty, and such shares shall be credited to Company’s treasury share account. Contact information for Counterparty’s representative at Computershare is: 

  
 10 







 Mr. James Walsh 

Assistant Vice President, Relationship Management 

Computershare 
 250 Royall Street,
Canton, MA 02021 
 Telephone No.: (781) 575-3008 

 

	 	(b)	Account for payments to Dealer: 

 Bank:
            Citibank NA New York 
 ABA#:
          021000089 
 Acct No.:       00167679 

Beneficiary:   Citibank New York 

Ref:               NY Swap Operations 

Account for delivery of Shares to Dealer: 

Citigroup Inc. 
 DTC: 0418 

Account: 768-08121-2-5

  

	4.	Offices. 

  

	 	(a)	The Office of Counterparty for each Transaction is: Inapplicable, Counterparty is not a Multibranch Party. 

  

	 	(b)	The Office of Dealer for each Transaction is: New York. 

  

	5.	Notices. 

  

	 	(a)	Address for notices or communications to Counterparty: 

 Rambus, Inc. 

1050 Enterprise Way, Suite 700 

Sunnyvale, California 94089 

Attention:              Treasurer 

Telephone No.:     (408) 462-8000 

Facsimile No.:      (408) 462-8001 

Email Address:     gbarrett@rambus.com 
  

	 	(b)	Address for notices or communications to Dealer: 

 Citibank, N.A. 

388 Greenwich Street, 6th Floor 

New York, NY 10013 
 Attention:
Equity Derivatives 
 Telephone No: (212) 723-5757 

Facsimile No: (347) 853-7278 

Email Address: dustin.c.sheppard@citi.com; eq.us.corporates.middle.office@citi.com; 

peter.barna@citi.com; joseph.stooots@citi.com; Theodore.finkelstein@citi.com 

 

	6.	Representations, Warranties and Agreements. 

  

	 	(a)	Additional Representations, Warranties and Covenants of Each Party. In addition to the representations, warranties and covenants in the Agreement, each party represents, warrants and covenants to the other party
that: 


  
 11 








	 	(i)	It is an “eligible contract participant” (as such term is defined in the Commodity Exchange Act, as amended). 

  

	 	(ii)	Each party acknowledges that the offer and sale of each Transaction to it is intended to be exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), by virtue of
Section 4(a)(2) thereof. Accordingly, each party represents and warrants to the other that (A) it has the financial ability to bear the economic risk of its investment in each Transaction and is able to bear a total loss of its investment,
(B) it is a “qualified institutional buyer” as defined in Rule 144A under the Securities Act or an “accredited investor” as that term is defined under Regulation D under the Securities Act and (C) the disposition of
each Transaction is restricted under this Master Confirmation, the Securities Act and state securities laws. 

  

	 	(b)	Additional Representations, Warranties and Covenants of Counterparty. In addition to the representations, warranties and covenants in the Agreement, Counterparty represents, warrants and covenants to Dealer that:


  

	 	(i)	As of the Trade Date for each Transaction hereunder, (A) such Transaction is being entered into pursuant to a publicly disclosed Share buy-back program and its Board of
Directors has approved the use of agreements such as this Master Confirmation to effect the Share buy-back program, and (B) there is no internal policy of Counterparty, whether written or oral, that would
prohibit Counterparty from entering into any aspect of such Transaction, including, without limitation, the purchases of Shares to be made pursuant to such Transaction. 


 

	 	(ii)	As of the Trade Date for each Transaction hereunder, the purchase or writing of such Transaction and the transactions contemplated hereby will not violate Rule 13e-1 or Rule 13e-4 under the Exchange Act. 

  

	 	(iii)	As of the Trade Date for each Transaction hereunder, it is not entering into such Transaction, and as of the date of any election with respect to any Transaction hereunder, it is not making such election, in each case
(A) on the basis of, and is not aware of, any material non-public information regarding Counterparty or the Shares, (B) in anticipation of, in connection with, or to facilitate, a distribution of its
securities, a self tender offer or a third-party tender offer in violation of the Exchange Act or (C) to create actual or apparent trading activity in the Shares (or any security convertible into or exchangeable for the Shares) or to manipulate
the price of the Shares (or any security convertible into or exchangeable for the Shares). 

  

	 	(iv)	Counterparty (A) is capable of evaluating investment risks independently, both in general and with regard to all transactions and investment strategies involving a security or securities; (B) will exercise
independent judgment in evaluating the recommendations of any broker-dealer or its associated persons, unless it has otherwise notified the broker-dealer in writing; and (C) has total assets of at least USD 50,000,000 as of the date hereof.


  

	 	(v)	As of the Trade Date for each Transaction hereunder, and as of the date of any election with respect to any Transaction hereunder, Counterparty is in compliance in all material respects with its reporting obligations
under the Exchange Act. 

  

	 	(vi)	Counterparty has made, and will make, all filings required to be made by it with the Securities and Exchange Commission, any securities exchange or any other regulatory body with respect to each Transaction during the
term of the relevant Transaction. 

  

	 	(vii)	 The Shares are not, and Counterparty will not cause the Shares to be, subject to a “restricted period”
(as defined in Regulation M promulgated under the Exchange Act) (excluding for the purposes of this provision any issuances by the Counterparty of securities or undertaking of activities exempted from Regulation M by means of Rule




  
 12 








	 	
102(b), (c) or (d) of Regulation M (as defined below)) at any time during any Regulation M Period for any Transaction unless Counterparty has provided written notice to Dealer of such
restricted period not later than the Scheduled Trading Day immediately preceding the first day of such “restricted period”; Counterparty acknowledges that any such notice may be treated as a Regulatory Disruption pursuant to Section 7
below; accordingly, Counterparty acknowledges that its delivery of such notice must comply with the standards set forth in Section 8 below. Counterparty is not currently contemplating any “distribution” (as defined in Regulation M
promulgated under the Exchange Act) of Shares, or any security for which Shares are a “reference security” (as defined in Regulation M promulgated under the Exchange Act). “Regulation M Period” means, for any Transaction,
(A) the Relevant Period (as defined below) for such Transaction, (B) the Settlement Valuation Period, if any, for such Transaction and (C) the Seller Termination Purchase Period (as defined below), if any, for such Transaction.
“Relevant Period” means, for any Transaction, the period commencing on the Calculation Period Start Date for such Transaction and ending on the later of (1) the earlier of (x) the Scheduled Termination Date and
(y) the last Additional Relevant Day (as specified in the related Supplemental Confirmation) for such Transaction, or such earlier day as elected by Dealer and communicated to Counterparty on such day (or, if later, the First Acceleration Date
without regard to any acceleration thereof pursuant to “Special Provisions for Acquisition Transaction Announcements” below) and (2) if Section 15 is applicable to such Transaction, the date on which all deliveries owed pursuant
to Section 15 have been made. 

  

	 	(viii)	As of the Trade Date, the Prepayment Date, the Initial Share Delivery Date, the Settlement Date, any Cash Settlement Payment Date and any Settlement Method Election Date for each Transaction, Counterparty is not
“insolvent” (as such term is defined under Section 101(32) of the U.S. Bankruptcy Code (Title 11 of the United States Code) (the “Bankruptcy Code”)) and Counterparty would be able to purchase a number of Shares with a
value equal to the Prepayment Amount in compliance with the laws of the jurisdiction of Counterparty’s incorporation. 

  

	 	(ix)	Counterparty is not, and after giving effect to each Transaction will not be, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.


  

	 	(x)	Counterparty shall, at least one day prior to the first day of the Calculation Period, the Settlement Valuation Period, if any, or the Seller Termination Purchase Period, if any, for any Transaction, notify Dealer of
the total number of Shares purchased in Rule 10b-18 purchases of blocks pursuant to the once-a-week block exception set forth in
paragraph (b)(4) of Rule 10b-18 under the Exchange Act (“Rule 10b-18”) by or for Counterparty or any of its “affiliated purchasers” (as
defined in Rule 10b-18) during each of the four calendar weeks preceding such day and during the calendar week in which such day occurs (“Rule 10b-18 purchase”
and “blocks” each being used as defined in Rule 10b-18), which notice shall be substantially in the form set forth in Schedule B hereto. 


 

	 	(xi)	As of the Trade Date for each Transaction hereunder, and as of the date of any election with respect to any Transaction hereunder, there has not been any Merger Announcement (as defined below). 


 

	 	(c)	In addition to the representations, warranties and covenants in this Agreement, Dealer represents, warrants and covenants to Counterparty that: 


 

	 	(i)	 In addition to the covenants in the Agreement and herein, Dealer agrees to use commercially reasonable efforts,
during the Calculation Period and any Settlement Valuation Period (as defined in Annex A) for any Transaction, to make all purchases of Shares in connection with such Transaction in a manner that would comply with the limitations set forth in
clauses (b)(1), (b)(2), (b)(3) and (b)(4) and (c) of Rule 10b-18, as 



  
 13 








	 	
if such rule were applicable to such purchases and taking into account any applicable Securities and Exchange Commission no-action letters as appropriate,
and subject to any delays between the execution and reporting of a trade of the Shares on the Exchange and other circumstances beyond Dealer’s control; provided that, during the Calculation Period, the foregoing agreement shall not apply to
purchases made to dynamically hedge for Dealer’s own account or the account of its affiliate(s) the optionality arising under a Transaction (including, for the avoidance of doubt, timing optionality); provided further that, without limiting the
generality of the first sentence of this Section 6(c)(i), Dealer shall not be responsible for any failure to comply with Rule 10b-18(b)(3) to the extent any transaction that was executed (or deemed to be
executed) by or on behalf of Counterparty or an “affiliated purchaser” (as defined under Rule 10b-18) pursuant to a separate agreement is not deemed to be an “independent bid” or an
“independent transaction” for purposes of Rule 10b-18(b)(3). 

  

	 	(ii)	In connection with each Transaction, Dealer represents and warrants to Counterparty that it has not, at any time before the filing of a Form 8-K reporting the entry into such
Transaction on the Trade Date for such Transaction, discussed any offsetting transaction(s) in respect of such Transaction with any third party. 

  

	 	(iii)	Dealer hereby represents and covenants to Counterparty that it has implemented policies and procedures, taking into consideration the nature of its business, reasonably designed to ensure that individuals making
investment decisions related to any Transaction do not have access to material nonpublic information regarding Issuer or the Shares. 

  

	 	(iv)	Within one Exchange Business Day of purchasing any Shares on behalf of Counterparty pursuant to the once-a-week block exception set forth
in paragraph (b)(4) of Rule 10b-18, Dealer shall notify Counterparty of the total number of Shares so purchased. 

  

	 	(v)	On the first Exchange Business Day of each week, Dealer shall provide weekly reports (the “Weekly Reports”) in connection with such Transaction to the Counterparty and to such other persons or agents of
the Counterparty as the Counterparty shall reasonably designate in writing, by electronic mail to the Counterparty or its designee. Each weekly report shall include the ADTV in the Shares for each Scheduled Trading Day during the immediately
preceding week (as defined and determined in accordance with Rule 10b-18, as defined herein), the VWAP Price for each such Scheduled Trading Day and the high and low price on each such Scheduled Trading Day.
For the avoidance of doubt and notwithstanding anything to the contrary in the two immediately preceding sentences, the VWAP Price for purposes of this Master Confirmation shall be determined pursuant the language opposite the caption “VWAP
Price” in Section 1 of this Master Confirmation under the heading “Valuation” and not on the basis of, or by reference to, the VWAP Price set forth in any Weekly Report. 


 

	7.	Regulatory Disruption. In the event Dealer concludes, in its good faith, reasonable judgment, based on the advice of counsel, that it is appropriate with respect to any legal, regulatory or
self-regulatory requirements or related policies and procedures similarly applicable to accelerated share repurchase transactions and consistently applied (whether or not such requirements, policies or procedures are imposed by law or have been
voluntarily adopted by Dealer) (provided that such requirements, policies and procedures relate to regulatory issues and are generally applicable in similar situations and are applied in a consistent manner in similar transactions) for it to
refrain from or decrease any market activity on any Scheduled Trading Day or Days during the Calculation Period or, if applicable, the Settlement Valuation Period, Dealer may, in its commercially reasonable discretion, by written notice to
Counterparty elect to deem that a Market Disruption Event has occurred and will be continuing on such Scheduled Trading Day or Days. Dealer shall notify Counterparty as soon as practicable (but in no event later than one Trading Day) that a
Regulatory Disruption has occurred and the reasons for such Regulatory Disruption and the Scheduled Trading Days affected by it, provided that the Dealer shall not be obligated to disclose any proprietary or confidential models or any other
confidential or proprietary information, in each case, used by it for such determination. If a Regulatory Disruption is deemed to have occurred such Scheduled Trading Day or Scheduled Trading Days will each be a Disrupted Day in full.



  
 14 








	8.	10b5-1 Plan. Counterparty represents, warrants and covenants to Dealer that: 


 

	 	(a)	Counterparty is entering into this Master Confirmation and each Transaction hereunder in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b5-1
under the Exchange Act (“Rule 10b5-1”) or any other antifraud or anti-manipulation provisions of the federal or applicable state securities laws and that it has not entered into or altered and
will not enter into or alter any corresponding or hedging transaction or position with respect to the Shares. Counterparty acknowledges that it is the intent of the parties that each Transaction entered into under this Master Confirmation comply
with the requirements of paragraphs (c)(1)(i)(A) and (B) of Rule 10b5-1 and each Transaction entered into under this Master Confirmation shall be interpreted to comply with the requirements of Rule 10b5-1(c). 

  

	 	(b)	During the Calculation Period and the Settlement Valuation Period, if any, for any Transaction and in connection with the delivery of any Alternative Delivery Units for any Transaction, Dealer (or its agent or
Affiliate) may effect transactions in Shares in connection with such Transaction. The timing of such transactions by Dealer, the price paid or received per Share pursuant to such transactions and the manner in which such transactions are made,
including, without limitation, whether such transactions are made on any securities exchange or privately, shall be within the sole judgment of Dealer. Counterparty acknowledges and agrees that all such transactions shall be made in Dealer’s
sole judgment and for Dealer’s own account. 

  

	 	(c)	Counterparty does not have, and shall not attempt to exercise, any control or influence over how, when or whether Dealer (or its agent or Affiliate) makes any “purchases or sales” (within the meaning of Rule 10b5-1(c)(1)(i)(B)(3)) in connection with any Transaction, including, without limitation, over how, when or whether Dealer (or its agent or Affiliate) enters into any hedging transactions. Counterparty represents
and warrants that it has consulted with its own advisors as to the legal aspects of its adoption and implementation of this Master Confirmation and each Supplemental Confirmation under Rule 10b5-1.


  

	 	(d)	Counterparty acknowledges and agrees that any amendment, modification, waiver or termination of this Master Confirmation or any Supplemental Confirmation must be effected in accordance with the requirements for the
amendment or termination of a “plan” as defined in Rule 10b5-1(c). Without limiting the generality of the foregoing, any such amendment, modification, waiver or termination shall be made in good
faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b-5, and no such amendment, modification or waiver shall be made at any time at which Counterparty or any officer, director,
manager or similar person of Counterparty is aware of any material non-public information regarding Counterparty or the Shares. 


 

	 	(e)	Counterparty shall not, directly or indirectly, communicate any information relating to the Shares or any Transaction (including, without limitation, any notices required by Section 10(a)) to any employee of
Dealer, other than as set forth in the Communications Procedures attached as Annex B hereto. 

  

	9.	Counterparty Purchases. Counterparty (or any “affiliate” or “affiliated purchaser” as defined in Rule 10b-18) shall not, without
the prior written consent of Dealer, directly or indirectly (including, without limitation, by means of a derivative instrument) purchase, offer to purchase, place any bid or limit order that would effect a purchase of, or commence any tender offer
relating to, any Shares (or equivalent interest, including, without limitation, a unit of beneficial interest in a trust or limited partnership or a depository share), listed contracts on the Shares or securities that are convertible into, or
exchangeable or exercisable for Shares (including, without limitation, any Rule 10b-18 purchases of blocks (as defined in Rule 10b-18)) during any Relevant Period, any
Settlement Valuation Period (if applicable) or any Seller Termination Purchase Period (if applicable), under this Master Confirmation. 


  
 15 







 Notwithstanding the immediately preceding paragraph or anything herein to the contrary
(i) an agent independent of Counterparty may purchase Shares effected by or for an issuer plan Counterparty in accordance with the requirements of Section 10b-18(a)(13)(ii) under the Exchange Act
(with “issuer plan” and “agent independent of Counterparty” each being used herein as defined in Rule 10b-18), and (ii) Counterparty or any “affiliated purchaser” may
purchase Shares in (x) unsolicited transactions or (y) privately negotiated (off-market) transactions, in each case, that are not “Rule 10b-18
purchases” (as defined in Rule 10b-18), in each case, without Dealer’s consent. 
 Nothing
in this Section 9 will (i) limit the Counterparty’s ability, pursuant to its employee incentive plans or dividend reinvestment program, to reacquire Shares in connection with the related equity transactions, (ii) limit
Counterparty’s ability to withhold shares to cover tax liabilities associated with such equity transaction, or (iii) limit Counterparty’s ability to grant stock, restricted stock units and options to “affiliated partners”
(as defined in Rule 10b-18) or the ability of such affiliated purchasers to acquire such stock or options, in connection with the Counterparty’s compensation policies for directors, officers or employees
of any entities that are acquisition targets of Counterparty, and in connection with such purchase Counterparty will be deemed to represent to Dealer that such purchase does not constitute a “Rule 10b-18
Purchase” (as defined in Rule 10b-18) (any such incentive or compensatory plan, program or policy of Counterparty, a “Compensatory Plan”) (collectively, “Permitted
Purchases”). 
  

	10.	Special Provisions for Merger Transactions. Notwithstanding anything to the contrary herein or in the Equity Definitions: 


 

	 	(a)	Counterparty agrees that it: 

  

	 	(i)	will not during the period commencing on the Trade Date for any Transaction and ending on the last day of the Relevant Period or, if applicable, the later of the last day of the Settlement Valuation Period and the last
day of the Seller Termination Purchase Period, for such Transaction make, or to the extent within Counterparty’s reasonable control, permit to be made, any public announcement (as defined in Rule 165(f) under the Securities Act) of any Merger
Transaction or potential Merger Transaction (a “Merger Announcement”) unless such Merger Announcement is made prior to the opening or after the close of the regular trading session on the Exchange for the Shares; provided
that, upon any Merger Announcement during such period, as applicable, that is made at any time other than prior to the opening or after the close of the regular trading session on the Exchange for the Shares, the provisions of Section 6(c)(i)
hereof shall no longer apply to Dealer; 

  

	 	(ii)	shall promptly (but in any event prior to the next opening of the regular trading session on the Exchange) notify Dealer following any such Merger Announcement that such Merger Announcement has been made; and


  

	 	(iii)	shall promptly (but in any event prior to the next opening of the regular trading session on the Exchange) provide Dealer with written notice specifying (i) Counterparty’s average daily Rule 10b-18 Purchases (as defined in Rule 10b-18) during the three full calendar months immediately preceding the announcement date of any Merger Transaction or potential Merger
Transaction that were not effected through Dealer or its Affiliates and (ii) the number of Shares purchased pursuant to the proviso in Rule 10b-18(b)(4) under the Exchange Act for the three full calendar
months preceding the announcement date of any Merger Transaction or potential Merger Transaction. Such written notice shall be deemed to be a certification by Counterparty to Dealer that such information is true and correct. In addition,
Counterparty shall promptly notify Dealer of the earlier to occur of the completion of such transaction and the completion of the vote by target shareowners. 

  

	 	(b)	Counterparty acknowledges that any such Merger Announcement or delivery of a notice with respect thereto may cause the terms of any Transaction to be adjusted as a Regulatory Disruption or result in such Transaction
being terminated; accordingly, Counterparty acknowledges that its delivery of such notice must comply with the standards set forth in Section 8 above. 


  
 16 








	 	(c)	Any such Merger Announcement or the receipt of a notice with respect thereto by the Dealer may be treated by the Dealer as a Regulatory Disruption and result in the terms of any Transaction being adjusted by the Dealer
in a commercially reasonable manner (solely to account for the economic effect of such Public Announcement on the relevant Transaction as a result of such Regulatory Disruption) or result in such Transaction being treated as an Additional
Termination Event by Dealer. 

 “Merger Transaction” means any merger, acquisition or similar transaction
involving a recapitalization as contemplated by Rule 10b-18(a)(13)(iv) under the Exchange Act pursuant to which the Dealer determines, in its reasonable discretion, that Dealer would be limited in purchasing
Shares during the term of the relevant Transaction under Rule 10b-18 in the same manner that Rule 10b-18 would limit the Counterparty from purchasing Shares of its
Common Stock under Rule 10b-18, other than, solely for purposes of this Section 10, any such transaction in which the consideration consists solely of cash and there is no valuation period. 

Any adjustment to the terms of any Transaction hereunder and the determination of any amounts due upon termination of any Transaction hereunder
as a result of a Merger Transaction shall be made without duplication in respect of any prior adjustment hereunder (including, without limitation, any prior adjustment pursuant to Section 11 below). 

 

	11.	Special Provisions for Acquisition Transaction Announcements. Notwithstanding anything to the contrary herein or in the Equity Definitions: 


 

	 	(a)	If an Acquisition Transaction Announcement occurs on or prior to the Settlement Date for any Transaction, then the Calculation Agent shall make such adjustment, in a commercially reasonable manner, to the Forward Price
Adjustment Amount as the Calculation Agent determines appropriate, at such time as the Calculation Agent determines appropriate, to account for the economic effect on the Forward Price Adjustment Amount of such Acquisition Transaction Announcement
in accordance with “Method of Adjustment” as set forth in Section 1 above, as amended pursuant to Section 22(a)-(c) of this Master Confirmation. 


 

	 	(b)	“Acquisition Transaction Announcement” means (i) the announcement of an Acquisition Transaction or an event that, if consummated, would result in an Acquisition Transaction, (ii) an
announcement that Counterparty or any of its subsidiaries has entered into an agreement, a letter of intent or an understanding designed to result in an Acquisition Transaction, (iii) the announcement by the Counterparty or any of its
subsidiaries of the intention to solicit or enter into, or to explore strategic alternatives or other similar undertaking that may include, an Acquisition Transaction, (iv) the announcement by a bona fide person of such person’s intention
to pursue an Acquisition Transaction that in the good faith commercially reasonable judgment of the Calculation Agent is reasonably likely to result in an Acquisition Transaction; provided that the Calculation Agent shall in good faith
determine whether any such person is a bona fide person or (v) any announcement of any change or amendment to any previous Acquisition Transaction Announcement (including any announcement of the abandonment of any such previously announced
Acquisition Transaction, agreement, letter of intent, understanding or intention). 

  

	 	(c)	 “Acquisition Transaction” means (i) any Merger Event (for purposes of this definition the
definition of Merger Event shall be read with the references therein to “100%” being replaced by “30%” and references to “50%” being replaced by “75%” and without reference to the clause beginning immediately
following the definition of Reverse Merger therein to the end of such definition), Tender Offer or Merger Transaction or any other transaction involving the merger of Counterparty with or into any third party, (ii) the sale or transfer of all
or substantially all of the assets of Counterparty, (iii) a recapitalization, reclassification, binding share exchange or other similar transaction with respect to Counterparty, (iv) any lease, exchange, transfer, disposition (including,
without limitation, by way of spin-off or distribution) of assets (including, without 



  
 17 








	 	
limitation, any capital stock or other ownership interests in subsidiaries) or other similar event by Counterparty or any of its subsidiaries where the aggregate consideration transferable or
receivable by or to Counterparty or its subsidiaries exceeds 25% of the market capitalization of Counterparty (measured as of the relevant date of announcement) or (v) any transaction in which Counterparty or its board of directors has a legal
obligation to make a recommendation to its shareowners in respect of such transaction (whether pursuant to Rule 14e-2 under the Exchange Act or otherwise). 


Any adjustment to the terms of any Transaction hereunder as a result of an Acquisition Transaction Announcement shall be made without
duplication in respect of any prior adjustment hereunder (including, without limitation, any prior adjustment pursuant to Section 10 above). 
  

	12.	Acknowledgments. 

  

	 	(a)	The parties hereto intend for: 

  

	 	(i)	each Transaction to be a “securities contract” as defined in Section 741(7) of the Bankruptcy Code and a “forward contract” as defined in Section 101(25) of the Bankruptcy Code, and the
parties hereto to be entitled to the protections afforded by, among other Sections, Sections 362(b)(6), 362(b)(27), 362(o), 546(e), 546(j), 555, 556, 560 and 561 of the Bankruptcy Code; 


 

	 	(ii)	the Agreement to be a “master netting agreement” as defined in Section 101(38A) of the Bankruptcy Code; 

  

	 	(iii)	a party’s right to liquidate, terminate or accelerate any Transaction, net out or offset termination values or payment amounts, and to exercise any other remedies upon the occurrence of any Event of Default or
Termination Event under the Agreement with respect to the other party or any Extraordinary Event that results in the termination or cancellation of any Transaction to constitute a “contractual right” (as defined in the Bankruptcy Code);
and 

  

	 	(iv)	all payments for, under or in connection with each Transaction, all payments for the Shares (including, for the avoidance of doubt, payment of the Prepayment Amount) and the transfer of such Shares to constitute
“settlement payments” and “transfers” (as defined in the Bankruptcy Code). 

  

	 	(b)	Counterparty acknowledges that: 

  

	 	(i)	during the term of any Transaction, Dealer and its Affiliates may buy or sell Shares or other securities or buy or sell options or futures contracts or enter into swaps or other derivative securities in order to
establish, adjust or unwind its hedge position with respect to such Transaction; 

  

	 	(ii)	Dealer and its Affiliates may also be active in the market for the Shares and Share-linked transactions other than in connection with hedging activities in relation to any Transaction; 


 

	 	(iii)	Dealer shall make its own determination as to whether, when or in what manner any hedging or market activities in Counterparty’s securities shall be conducted and shall do so in a manner that it deems appropriate
to hedge its price and market risk with respect to the Forward Price and the VWAP Price; 

  

	 	(iv)	any market activities of Dealer and its Affiliates with respect to the Shares may affect the market price and volatility of the Shares, as well as the Forward Price and VWAP Price, each in a manner that may be adverse
to Counterparty; and 


  
 18 








	 	(v)	each Transaction is a derivatives transaction in which it has granted Dealer an option; Dealer may purchase shares for its own account at an average price that may be greater than, or less than, the price paid by
Counterparty under the terms of the related Transaction. 

  

	13.	No Collateral, Netting or Setoff. Notwithstanding any provision of the Agreement or any other agreement between the parties to the contrary, the obligations of Counterparty hereunder are not
secured by any collateral. Obligations under any Transaction shall not be netted, recouped or set off (including pursuant to Section 6 of the Agreement) against any other obligations of the parties, whether arising under the Agreement, this
Master Confirmation or any Supplemental Confirmation, or under any other agreement between the parties hereto, by operation of law or otherwise, and no other obligations of the parties shall be netted, recouped or set off (including pursuant to
Section 6 of the Agreement) against obligations under any Transaction, whether arising under the Agreement, this Master Confirmation or any Supplemental Confirmation, or under any other agreement between the parties hereto, by operation of law
or otherwise, and each party hereby waives any such right of setoff, netting or recoupment. 

  

	14.	Delivery of Shares. Notwithstanding anything to the contrary herein, Dealer may, by prior notice to Counterparty, satisfy its obligation to deliver any Shares or other securities on any date
due (an “Original Delivery Date”) by making separate deliveries of Shares or such securities, as the case may be, at more than one time on or prior to such Original Delivery Date, so long as the aggregate number of Shares and other
securities so delivered on or prior to such Original Delivery Date is equal to the number required to be delivered on such Original Delivery Date. 

  

	15.	 Alternative Termination Settlement. In the event that (a) an Early Termination
Date (whether as a result of an Event of Default or a Termination Event) occurs or is designated with respect to any Transaction or (b) any Transaction is cancelled or terminated upon the occurrence of an Extraordinary Event (except as a result
of (i) a Nationalization, Insolvency or Merger Event in which the consideration to be paid to holders of Shares consists solely of cash, (ii) a Merger Event or Tender Offer that is within Counterparty’s control, or (iii) an Event
of Default in which Counterparty is the Defaulting Party or a Termination Event in which Counterparty is the Affected Party other than an Event of Default arising solely from a failure to comply with Section 6(b)(vi) of this Master
Confirmation, an Event of Default of the type described in Section 5(a)(iii), (v), (vi), (vii) or (viii) of the Agreement or a Termination Event of the type described in Section 5(b) of the Agreement, in each case that resulted from
an event or events outside Counterparty’s control), if either party would owe any amount to the other party pursuant to Section 6(d)(ii) of the Agreement or any Cancellation Amount pursuant to Article 12 of the Equity Definitions (any such
amount, a “Payment Amount”), then, in lieu of any payment of such Payment Amount, unless Counterparty makes an election to the contrary no later than the Early Termination Date or the date on which such Transaction is terminated or
cancelled, Counterparty or Dealer, as the case may be, shall deliver to the other party a number of Shares (or, in the case of a Nationalization, Insolvency or Merger Event, a number of units, each comprising the number or amount of the securities
or property that a hypothetical holder of one Share would receive in such Nationalization, Insolvency or Merger Event, as the case may be (each such unit, an “Alternative Delivery Unit”) with a value equal to the Payment Amount, as
determined by the Calculation Agent in good faith and in a commercially reasonably manner over a commercially reasonable period of time (and the parties agree that, in making such determination of value, the Calculation Agent may take into account a
number of factors, including, without limitation, the market price of the Shares or Alternative Delivery Units on the Early Termination Date or the date of early cancellation or termination, as the case may be, and, if such delivery is made by
Dealer, the prices at which Dealer purchases Shares or Alternative Delivery Units on any Exchange Business Day to fulfill its delivery obligations under this Section 15); provided that in determining the composition of any Alternative
Delivery Unit, if the relevant Nationalization, Insolvency or Merger Event involves a choice of consideration to be received by holders, such holder shall be deemed to have elected to receive the maximum possible amount of cash; and provided
further that Counterparty may elect that the provisions of this Section 15 above providing for the delivery of Shares or Alternative Delivery Units, as the case may be, shall not apply only if Counterparty represents and warrants to Dealer,
in writing on the date it notifies Dealer of such election, that, as of such date, Counterparty is not aware of any material non-public information regarding Counterparty or the Shares and is making such
election in good faith and not as part of a plan or scheme to evade compliance with the federal securities laws. If delivery of Shares or Alternative Delivery Units, as the case may be, pursuant to




  
 19 








	 	
this Section 15 is to be made by Counterparty, paragraphs 2 through 7 of Annex A hereto shall apply as if (A) such delivery were a settlement of such Transaction to which Net Share
Settlement applied, (B) the Cash Settlement Payment Date were the Early Termination Date or the date of early cancellation or termination, as the case may be, and (C) the Forward Cash Settlement Amount were equal to (x) zero
minus (y) the Payment Amount owed by Counterparty. For the avoidance of doubt, if Counterparty validly elects for the provisions of this Section 15 relating to the delivery of Shares or Alternative Delivery Units, as the case may
be, not to apply to any Payment Amount, the provisions of Article 12 of the Equity Definitions, or the provisions of Section 6(d)(ii) of the Agreement, as the case may be, shall apply. If delivery of Shares or Alternative Delivery Units, as the
case may be, is to be made by Dealer pursuant to this Section 15, the period during which Dealer purchases Shares or Alternative Delivery Units to fulfill its delivery obligations under this Section 15 shall be referred to as the
“Seller Termination Purchase Period”. 

  

	16.	Calculations and Payment Date upon Early Termination. The parties acknowledge and agree that in calculating (a) the Close-Out Amount pursuant to
Section 6 of the Agreement and (b) the amount due upon cancellation or termination of any Transaction (whether in whole or in part) pursuant to Article 12 of the Equity Definitions as a result of an Extraordinary Event, Dealer may (but
need not) determine such amount based on (i) expected losses assuming a commercially reasonable (including, without limitation, with regard to reasonable legal and regulatory guidelines customary for transactions of this type) risk bid were
used to determine loss or (ii) the price at which one or more market participants would offer to sell to the Seller a block of shares of Common Stock equal in number to the Seller’s hedge position in relation to the relevant Transaction.
Notwithstanding anything to the contrary in Section 6(d)(ii) of the Agreement or Article 12 of the Equity Definitions, all amounts calculated as being due in respect of an Early Termination Date under Section 6(e) of the Agreement or upon
cancellation or termination of the relevant Transaction under Article 12 of the Equity Definitions will be payable on the day that notice of the amount payable is effective; provided that if Counterparty elects to receive or deliver Shares or
Alternative Delivery Units in accordance with Section 15, such Shares or Alternative Delivery Units shall be delivered on a date selected by Dealer as promptly as practicable. 


 

	17.	Limit on Beneficial Ownership. Notwithstanding anything to the contrary in this Master Confirmation, Counterparty acknowledges and agrees that, on any day, Dealer shall not be obligated to
receive from Counterparty any Shares, and Counterparty shall not be entitled to deliver to Dealer any Shares, to the extent (but only to the extent) that after such transactions Dealer’s ultimate parent entity would directly or indirectly
“beneficially own” (as such term is defined for purposes of Section 13(d) of the Exchange Act) at any time on such day in excess of 8% of the outstanding Shares. Any purported receipt of Shares shall be void and have no effect to the
extent (but only to the extent) that after such receipt, Dealer’s ultimate parent entity would directly or indirectly so beneficially own in excess of 8% of the outstanding Shares. If, on any day, any receipt of Shares by Dealer is not
effected, in whole or in part, as a result of this Section 17, Counterparty’s obligations to deliver such Shares shall not be extinguished and any such delivery shall be effected over time by Counterparty as promptly as Dealer determines,
such that after any such delivery, Dealer’s ultimate parent entity would not directly or indirectly beneficially own in excess of 8% of the outstanding Shares. 


 

	18.	Maximum Share Delivery. Notwithstanding anything to the contrary in this Master Confirmation, in no event shall Dealer be required to deliver any Shares, or any Shares or other securities
comprising Alternative Delivery Units, in respect of any Transaction in excess of the Maximum Number of Shares set forth in the Supplemental Confirmation for such Transaction. 


 

	19.	Additional Termination Events. 

  

	 	(a)	The occurrence of an event described in paragraph III of Annex B hereto will constitute an Additional Termination Event, with Counterparty as the sole Affected Party and the Transactions specified in such paragraph III
as the Affected Transactions. 

  

	 	(b)	Notwithstanding anything to the contrary in Section 6 of the Agreement, if a Termination Price is specified in the Supplemental Confirmation for any Transaction, then an Additional Termination Event (with respect
to which Counterparty shall be the sole Affected Party and such Transaction shall be the sole Affected Transaction) will occur without any notice or action by Dealer or Counterparty if, on two consecutive Exchange Business Days, the price of the
Shares on the Exchange at any time falls below such Termination Price. 


  
 20 








	20.	Non-confidentiality. Dealer and Counterparty hereby acknowledge and agree that, subject to Section 8(e), each is authorized to disclose the tax
structure and tax treatment of the transactions contemplated by this Master Confirmation and any Supplemental Confirmation hereunder to any and all persons, without limitation of any kind, and there are no express or implied agreements, arrangements
or understandings to the contrary. 

  

	21.	Assignment and Transfer. Notwithstanding anything to the contrary in the Agreement, without the consent of Counterparty, Dealer may assign any of its rights or duties hereunder to any one or
more of its Affiliates (1) that has a long-term issuer rating that is equal to or better than Dealer’s credit rating at the time of such assignment, or (2) whose obligations hereunder will be guaranteed, pursuant to the terms of a
customary guarantee in a form used generally for similar transactions, by Dealer or Dealer’s ultimate parent; provided that, at the time of such assignment (i) Counterparty will not be required to pay (including a payment in kind)
to the transferee any amount in respect of an Indemnifiable Tax under Section 2(d)(i)(4) of the Agreement (except in respect of interest under Section 2(e), 6(d)(ii) or 6(e) of the Agreement) greater than the amount in respect of which
Counterparty would have been required to pay to Dealer in the absence of such transfer; and (ii) Counterparty will not receive any payment (including a payment in kind) from which an amount had been withheld or deducted, on account of a Tax
under Section 2(d)(i) of the Agreement (except in respect of interest under Section 2(e), 6(d)(ii) or 6(e) of the Agreement), in excess of that which Dealer would have been required to so withhold or deduct in the absence of such transfer,
except to the extent that the transferee will be required to make additional payments pursuant to Section 2(d)(i)(4) of the Agreement in respect of such excess. Notwithstanding any other provision in this Master Confirmation to the contrary
requiring or allowing Dealer to purchase, sell, receive or deliver any Shares or other securities to or from Counterparty, Dealer may designate any of its Affiliates to purchase, sell, receive or deliver such Shares or other securities and otherwise
to perform Dealer’s obligations in respect of any Transaction and any such designee may assume such obligations. Dealer may assign the right to receive Settlement Shares to any third party who may legally receive Settlement Shares. Dealer shall
be discharged of its obligations to Counterparty only to the extent of any such performance. For the avoidance of doubt, Dealer hereby acknowledges that notwithstanding any such designation hereunder, to the extent any of Dealer’s obligations
in respect of any Transaction are not completed by its designee, Dealer shall be obligated to continue to perform or to cause any other of its designees to perform in respect of such obligations. 


 

	22.	Amendments to the Equity Definitions. 

  

	 	(a)	Section 11.2(a) of the Equity Definitions is hereby amended by deleting the words “a diluting or concentrative” and replacing them with the words “in the commercially reasonable judgment of the
Calculation Agent, a material economic”; and adding the phrase “or such Transaction” at the end of the sentence. 

  

	 	(b)	Section 11.2(c) of the Equity Definitions is hereby amended by (i) replacing the words “a diluting or concentrative” with “a material economic” in the fifth line thereof, (ii) adding
the phrase “or such Transaction” after the words “the relevant Shares” in the same sentence, (iii) replacing the words “dilutive or concentrative” in the sixth to last line thereof with “material
economic”, and (iv) with respect to any Potential Adjustment Event under Sections 11.2(e)(ii)(B), (C) and (D), 11.2(e)(v), 11.2(e)(vi), or 11.2(e)(vii) only, deleting the phrase “(provided that no adjustments will be made to account
solely for changes in volatility, expected dividends, stock loan rate or liquidity relative to the relevant Shares)” and replacing it with the phrase “(and, for the avoidance of doubt, adjustments may be made to account solely for changes
in volatility, expected dividends, stock loan rate or liquidity relative to the relevant Shares).” 

  

	 	(c)	Section 11.2(e) of the Equity Definitions is hereby amended by deleting clause (iii) thereof in its entirety. Section 11.2(e)(v) of the Equity Definitions is amended by adding the words “at a premium
to the current market price thereof (other than in connection with Permitted Purchases)” after the word “Shares” in such Section. Section 11.2(e)(vii) of the Equity Definitions is hereby amended by deleting the words “a
diluting or concentrative” and replacing them with the words “in the commercially reasonable judgement of the Calculation Agent, a material economic”; and adding the phrase “or the relevant Transaction” at the end of the
sentence. 


  
 21 








	 	(d)	Section 12.6(a)(ii) of the Equity Definitions is hereby amended by (i) deleting from the fourth line thereof the word “or” after the word “official” and inserting a comma therefor, and
(ii) deleting the semi-colon at the end of subsection (B) thereof and inserting the following words therefor “or (C) at Dealer’s option, the occurrence of any of the events specified in Section 5(a)(vii) (1)
through (9) of the ISDA Master Agreement with respect to that Issuer.” 

  

	 	(e)	Section 12.9(b)(iv) of the Equity Definitions is hereby amended by: 

  

	 	(i)	deleting (1) subsection (A) in its entirety, (2) the phrase “or (B)” following subsection (A) and (3) the phrase “in each case” in subsection (B); and 


 

	 	(ii)	replacing the phrase “neither the Non-Hedging Party nor the Lending Party lends Shares” with the phrase “such Lending Party does not lend Shares” in the
penultimate sentence. 

  

	 	(f)	Section 12.9(b)(v) of the Equity Definitions is hereby amended by adding the phrase “; provided that the Non-Hedging Party may so elect to terminate the relevant
Transaction only if the Non-Hedging Party represents and warrants to the Hedging Party in writing on the date it notifies the Hedging Party of such election that, as of such date, the Non-Hedging Party is not aware of any material non-public information regarding Counterparty or the Shares and is making such election in good faith and not as part of a plan
or scheme to evade compliance with the federal securities laws” immediately prior to the period at the end of subsection (C). 

  

	 	(g)	Section 12.9(b)(v) of the Equity Definitions is hereby amended by deleting clause (X) in the final sentence. 

  

	23.	Reserved. 

  

	24.	Status of Claims in Bankruptcy. Dealer acknowledges and agrees that neither this Master Confirmation nor any Supplemental Confirmation is intended to convey to Dealer rights against
Counterparty with respect to any Transaction that are senior to the claims of common stockholders of Counterparty in any United States bankruptcy proceedings of Counterparty; provided that nothing herein shall limit or shall be deemed to
limit Dealer’s right to pursue remedies in the event of a breach by Counterparty of its obligations and agreements with respect to any Transaction; provided further that nothing herein shall limit or shall be deemed to limit
Dealer’s rights in respect of any transactions other than any Transaction. 

  

	25.	Wall Street Transparency and Accountability Act. In connection with Section 739 of the Wall Street Transparency and Accountability Act of 2010 (“WSTAA”), the parties
hereby agree that neither the enactment of WSTAA or any regulation under the WSTAA, nor any requirement under WSTAA or an amendment made by WSTAA, nor any similar legal certainty provision in any legislation enacted, or rule or regulation
promulgated, on or after the date of this Master Confirmation, shall limit or otherwise impair either party’s otherwise applicable rights to terminate, renegotiate, modify, amend or supplement any Supplemental Confirmation, this Master
Confirmation or the Agreement, as applicable, arising from a termination event, force majeure, illegality, increased costs, regulatory change or similar event under any Supplemental Confirmation, this Master Confirmation, the Equity Definitions
incorporated herein, or the Agreement (including, without limitation, rights arising from Change in Law, Loss of Stock Borrow, Increased Cost of Stock Borrow, Hedging Disruption, Increased Cost of Hedging, or Illegality). 


 

	26.	Delivery of Cash. For the avoidance of doubt, other than (x) payment of the Prepayment Amount by Buyer and (y) any payment required pursuant Section 23 of this Master
Confirmation, nothing in this Master Confirmation shall be interpreted as requiring Buyer to cash settle any Transaction hereunder, except in circumstances where cash settlement is within Buyer’s control (including, without limitation, where
Buyer elects to deliver or receive cash, where Buyer fails timely to elect to deliver Settlement Shares pursuant Annex A hereof in settlement of any Transaction hereunder or to deliver or receive Alternative Termination Delivery Units, or where
Buyer has made settlement by delivery of Unregistered Settlement Shares in accordance with Annex A hereof unavailable due to the occurrence of events within its control) or in those circumstances in which holders of the Shares would also receive
cash. 


  
 22 








	27.	Counterparts. This Master Confirmation may be executed in any number of counterparts, all of which shall constitute one and the same instrument, and any party hereto may execute this Master
Confirmation by signing and delivering one or more counterparts. 

  

	28.	Waiver of Jury Trial. EACH PARTY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY SUIT, ACTION OR PROCEEDING RELATING TO THE
AGREEMENT, THIS MASTER CONFIRMATION, EACH SUPPLEMENTAL CONFIRMATION, THE TRANSACTIONS HEREUNDER AND ALL MATTERS ARISING IN CONNECTION WITH THE AGREEMENT, THIS MASTER CONFIRMATION AND ANY SUPPLEMENTAL CONFIRMATION AND THE TRANSACTIONS HEREUNDER. EACH
PARTY (I) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF SUCH A SUIT, ACTION OR PROCEEDING, SEEK TO ENFORCE THE FOREGOING WAIVER
AND (II) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HAVE BEEN INDUCED TO ENTER INTO THE TRANSACTIONS, AS APPLICABLE, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS PROVIDED HEREIN. 


  
 23 







 Please confirm that the foregoing correctly sets forth the terms of our agreement by executing
this Master Confirmation and returning it to us. 
  
  

			
	Very truly yours,
	
	    Citibank, N.A.
		
	    By:	 	 /s/ Peter Barna

		 	Authorized Signatory
		 	Name: Peter Barna


 Accepted and confirmed as 

of the date first set 
 forth above: 

 

			
	RAMBUS, INC.
		
	By:	 	 /s/ Rahul Mathur

		 	Authorized Signatory
		 	Name: Rahul Mathur







 SCHEDULE A 

SUPPLEMENTAL CONFIRMATION 
 Citibank, N.A.

 388 Greenwich Street 
 New York, NY 10013 

March 5, 2018 

	To:	Rambus, Inc. 

 1050 Enterprise Way, Suite 700 

Sunnyvale, California 94089 

Attention: Treasurer 
 Telephone
No.: (408) 462-8000 
 Facsimile No.: (408) 462-8001 

 

	Re:	Supplemental Confirmation—Uncollared Accelerated Share Repurchase 

 The purpose of this
Supplemental Confirmation is to confirm the terms and conditions of the Transaction entered into between Citibank, N.A. (“Dealer”), and Rambus, Inc., a Delaware corporation (“Counterparty”) on the Trade Date
specified below. This Supplemental Confirmation is a binding contract between Dealer and Counterparty as of the relevant Trade Date for the Transaction referenced below. 

1. This Supplemental Confirmation supplements, forms part of, and is subject to the Master Confirmation, dated as of March 5, 2018 (the “Master
Confirmation”), between Dealer and Counterparty, as amended and supplemented from time to time. All provisions contained in the Master Confirmation govern this Supplemental Confirmation except as expressly modified below. 

2. The terms of the Transaction to which this Supplemental Confirmation relates are as follows: 

 

			
	Trade Date:	  	March 5, 2018
		
	Forward Price Adjustment Amount:	  	USD 0.370787
		
	Calculation Period Start Date:	  	March 6, 2018
		
	Scheduled Termination Date:	  	September 4, 2018
		
	Final Termination Date:	  	December 4, 2018
		
	First Acceleration Date:	  	June 4, 2018
		
	Prepayment Amount:	  	USD 50,000,000.00
		
	Prepayment Date:	  	March 7, 2018
		
	Initial Shares:	  	3,117,693 Shares; provided that if, in connection with the Transaction, Dealer is unable, after using commercially reasonable efforts, to borrow or otherwise acquire a number of Shares equal to the Initial Shares for delivery
to Counterparty on the Initial Share Delivery Date, the Initial Shares delivered on the Initial Share Delivery Date shall be reduced to such number of Shares that Dealer is able to so borrow or otherwise acquire; provided further that if the
Initial Shares are reduced as provided in the preceding proviso, then Dealer shall use commercially reasonable efforts to borrow or


  
 Schedule A-1 








			
		  	otherwise acquire an additional number of Shares equal to the shortfall in the Initial Shares delivered on the Initial Share Delivery Date and shall deliver such additional Shares as promptly as practicable, and all Shares so
delivered shall be considered Initial Shares. All Shares delivered to Counterparty in respect of the Transaction pursuant to this paragraph shall be the “Initial Shares” for purposes of “Number of Shares to be Delivered” in the
Master Confirmation.
		
	Initial Share Delivery Date:	  	March 7, 2018
		
	Maximum Stock Loan Rate:	  	75 basis points per annum
		
	Initial Stock Loan Rate:	  	25 basis points per annum
		
	Maximum Number of Shares:	  	54,923,800 Shares
		
	Floor Price:	  	USD 1.00 per Share
		
	Termination Price:	  	USD 6.42 per Share
		
	Additional Relevant Days:	  	The five (5) Exchange Business Days immediately following the Calculation Period.
		
	Reserved Shares:	  	Notwithstanding anything to the contrary in the Master Confirmation, as of the date of this Supplemental Confirmation, the Reserved Shares shall be equal to 7,794,232 Shares.

 3. Counterparty represents and warrants to Dealer that neither it nor any “affiliated purchaser” (as defined in Rule 10b-18 under the Exchange Act) has made any purchases of blocks pursuant to the proviso in Rule 10b-18(b)(4) under the Exchange Act during either (i) the four full
calendar weeks immediately preceding the Trade Date or (ii) during the calendar week in which the Trade Date occurs, except as set forth in any notice delivered pursuant to Section 6(b)(xi) of the Master Confirmation. 

4. This Supplemental Confirmation may be executed in any number of counterparts, all of which shall constitute one and the same instrument, and any party
hereto may execute this Supplemental Confirmation by signing and delivering one or more counterparts. 

  
 Schedule A-2 







 Please confirm that the foregoing correctly sets forth the terms of our agreement by executing
this Supplemental Confirmation and returning it to us. 
  

			
	Very truly yours,
	
	    Citibank, N.A.
		
	    By:	 	 /s/ Peter Barna

		 	Authorized Signatory
		 	Name: Peter Barna


 Accepted and confirmed 
 as
of the Trade Date: 
  

			
	RAMBUS, INC.
		
	By:	 	 /s/ Rahul Mathur

		 	Authorized Signatory
		 	Name: Rahul Mathur


  
 Schedule A-3 







 SCHEDULE B 

FORM OF CERTIFICATE OF RULE 10B-18 PURCHASES 

[Letterhead of Counterparty] 

[                         
   ] 

[                          
  ] 

[                          
  ] 
 Facsimile:
[                            ] 

Telephone:
[                            ] 

 

	Re:	Uncollared Accelerated Share Repurchase 

 Ladies and Gentlemen: 

In connection with our entry into the Master Confirmation, dated as of March 5, 2018, between Citibank, N.A. (“Dealer”),
and Rambus, Inc., a Delaware corporation, as amended and supplemented from time to time (the “Master Confirmation”), we hereby represent that set forth below is the total number of shares of our common stock purchased by or for us
or any of our affiliated purchasers in Rule 10b-18 purchases of blocks (all as defined in Rule 10b-18 under the Securities Exchange Act of 1934) pursuant to the once-a-week block exception set forth in Rule 10b-18(b)(4) during the four full calendar weeks immediately preceding the first day of
the [Calculation Period][Settlement Valuation Period][Seller Termination Purchase Period] (as defined in the Master Confirmation) and the week during which the first day of such [Calculation Period][Settlement Valuation Period][Seller Termination
Purchase Period] occurs. 
 Number of Shares:
                         

We understand that you will use this information in calculating trading volume for purposes of Rule 10b-18. 

Very truly yours, 
 RAMBUS, INC. 

By: 
 Authorized Signatory 

Name: 

  
 Schedule B 







 ANNEX A 

COUNTERPARTY SETTLEMENT PROVISIONS 

1. The following Counterparty Settlement Provisions shall apply to any Transaction to the extent indicated under the Master Confirmation: 

 

			
	Settlement Currency:	  	USD
		
	Settlement Method Election:	  	Applicable; provided that (i) Section 7.1 of the Equity Definitions is hereby amended by deleting the word “Physical” in the sixth line thereof and replacing it with the words “Net Share” and
(ii) the Electing Party may make a settlement method election only if the Electing Party represents and warrants to Dealer in writing on the date it notifies Dealer of its election that, as of such date, the Electing Party is not aware of any
material non-public information regarding Counterparty or the Shares and is electing the settlement method in good faith and not as part of a plan or scheme to evade compliance with the federal securities
laws.
		
	Electing Party:	  	Counterparty
		
	Settlement Method Election Date:	  	The earlier of (x) the second Exchange Business Day immediately following the Accelerated Termination Date (in which case election under Section 7.1 of the Equity Definitions shall be made no later than 10 minutes prior to
the open of trading on the Exchange on such second Exchange Business Day) and (y) the Scheduled Termination Date (such earlier date, the “Scheduled Settlement Election Date”), unless, on the Scheduled Settlement Election Date,
Counterparty is aware of any material, non-public information regarding Counterparty or the Shares, in which case the Settlement Method Election Date shall be the earlier of (x) the 30th calendar day
immediately following the Scheduled Settlement Election Date and (y) the first date immediately following the Scheduled Settlement Election Date on which Counterparty is not aware of any material,
non-public information regarding Counterparty or the Shares.
		
	Default Settlement Method:	  	Cash Settlement
		
	Forward Cash Settlement Amount:	  	An amount equal to (a) the Number of Shares to be Delivered, multiplied by (b) the Settlement Price.
		
	Settlement Price:	  	An amount equal to the average of the VWAP Prices for the Exchange Business Days in the Settlement Valuation Period, subject to Valuation Disruption as specified in the Master Confirmation (in each case, plus interest on such
amount during the period of beginning on, and including, the first Exchange Business Day of the Settlement Valuation Period and ending on, but excluding, the Cash Settlement Payment Date at the rate of interest for Counterparty’s long term,
unsecured and unsubordinated indebtedness, as determined by the Calculation Agent).


  
 Annex A-1 








			
	Settlement Valuation Period:	  	A number of Scheduled Trading Days selected by Dealer in its commercially reasonable discretion, beginning on the Scheduled Trading Day immediately following the Termination Date. Dealer shall notify Counterparty of the last
Scheduled Trading Day of the Settlement Valuation Period on or prior to the Exchange Business Day immediately following such last Scheduled Trading Day.
		
	Cash Settlement:	  	If Cash Settlement is applicable, then Buyer shall pay to Seller the absolute value of the Forward Cash Settlement Amount on the Cash Settlement Payment Date.
		
	Cash Settlement Payment Date:	  	The later of (x) the Exchange Business Day immediately following the last day of the Settlement Valuation Period and (y) the earlier of the Exchange Business Day immediately following the date of Counterparty’s
Settlement Method Election and the Settlement Method Election Date.
		
	Net Share Settlement Procedures:	  	If Net Share Settlement is applicable, Net Share Settlement shall be made in accordance with paragraphs 2 through 7 below.

 2. Net Share Settlement shall be made by delivery on the Cash Settlement Payment Date of a number of Shares
satisfying the conditions set forth in paragraph 3 below (the “Registered Settlement Shares”), or a number of Shares not satisfying such conditions (the “Unregistered Settlement Shares”), in either case with a value
equal to 100.50% (in the case of Registered Settlement Shares) or 102.50% (in the case of Unregistered Settlement Shares) of the absolute value of the Forward Cash Settlement Amount, with such Shares’ value based on the value thereof to Dealer
(which value shall, in the case of Unregistered Settlement Shares, take into account a commercially reasonable illiquidity discount), in each case as determined by the Calculation Agent in good faith and a commercially reasonable manner. If all of
the conditions for delivery of either Registered Settlement Shares or Unregistered Settlement Shares have not been satisfied, Cash Settlement shall be applicable in accordance with paragraph 1 above notwithstanding Counterparty’s election of
Net Share Settlement. 
 3. Counterparty may only deliver Registered Settlement Shares pursuant to paragraph 2 above if: 

(a) a registration statement covering public resale of the Registered Settlement Shares by Dealer (the “Registration
Statement”) shall have been filed with the Securities and Exchange Commission under the Securities Act and been declared or otherwise become effective on or prior to the date of delivery, and no stop order shall be in effect with respect to
the Registration Statement; a printed prospectus relating to the Registered Settlement Shares (including, without limitation, any prospectus supplement thereto, the “Prospectus”) shall have been delivered to Dealer, in such
quantities as Dealer shall reasonably have requested, on or prior to the date of delivery; 
 (b) the form and content of the Registration
Statement and the Prospectus (including, without limitation, any sections describing the plan of distribution) shall be reasonably satisfactory to Dealer; 

(c) as of or prior to the date of delivery, Dealer and its agents shall have been afforded a reasonable opportunity to conduct a due diligence
investigation with respect to Counterparty customary in scope for underwritten offerings of equity securities for companies of a similar size in a similar industry (provided that prior to receiving or being granted access to any such
information, Dealer and any such agent may be required by Counterparty to enter into a customary nondisclosure agreement with Counterparty in respect of any such due diligence investigation) and the results of such investigation are satisfactory to
Dealer, in its judgment; and 
 (d) as of the date of delivery, an agreement (the “Underwriting Agreement”) shall have been
entered into with Dealer in connection with the public resale of the Registered Settlement Shares by Dealer substantially similar to underwriting agreements customary for underwritten offerings of equity securities for companies of a similar size in
a similar industry, in form and substance reasonably satisfactory to Dealer, which Underwriting Agreement shall include, without limitation, provisions substantially similar to those contained in such underwriting agreements relating, without
limitation, to the mutual indemnification of, and contribution in connection with the liability of, the parties and the provision of customary opinions, accountants’ comfort letters and lawyers’ negative assurance letters. 

  
 Annex A-2 







 4. If Counterparty delivers Unregistered Settlement Shares pursuant to paragraph 2 above: 

(a) all Unregistered Settlement Shares shall be delivered to Dealer (or any Affiliate of Dealer designated by Dealer) pursuant to the exemption
from the registration requirements of the Securities Act provided by Section 4(a)(2) thereof; 
 (b) as of or prior to the date of
delivery, Dealer and any potential purchaser of any such shares from Dealer (or any Affiliate of Dealer designated by Dealer) identified by Dealer shall be afforded a commercially reasonable opportunity to conduct a due diligence investigation with
respect to Counterparty customary in scope for private placements of equity securities of similar size by issuers similar to Counterparty (including, without limitation, the right to have made available to them for inspection all relevant financial
and other records, pertinent corporate documents and other information reasonably requested by them); provided that prior to receiving or being granted access to any such information, any such Dealer (or Affiliate) or potential purchaser may
be required by Counterparty to enter into a customary nondisclosure agreement with Counterparty in respect of any such due diligence investigation; 

(c) as of the date of delivery, Counterparty shall enter into an agreement (a “Private Placement Agreement”) with Dealer (or
any Affiliate of Dealer designated by Dealer) in connection with the private placement of such shares by Counterparty to Dealer (or any such Affiliate) and the private resale of such shares by Dealer (or any such Affiliate), substantially similar to
private placement purchase agreements customary for private placements of equity securities for companies of a similar size in a similar industry, in form and substance commercially reasonably satisfactory to Dealer, which Private Placement
Agreement shall include, without limitation, provisions substantially similar to those contained in such private placement purchase agreements relating, without limitation, to the mutual indemnification of, and contribution in connection with the
liability of, the parties and the provision of customary opinions, accountants’ comfort letters and lawyers’ negative assurance letters, and shall provide for the payment by Counterparty of all reasonable fees and actual, documented out-of-pocket expenses of Dealer (and any such Affiliate) in connection with such resale, including, without limitation, all reasonable fees and actual, documented out-of-pocket expenses of counsel for Dealer, and shall contain representations, warranties, covenants and agreements of the parties reasonably necessary or advisable to
establish and maintain the availability of an exemption from the registration requirements of the Securities Act for such resales; and 
 (d)
in connection with the private placement of such shares by Counterparty to Dealer (or any such Affiliate) and the private resale of such shares by Dealer (or any such Affiliate), Counterparty shall, if so requested by Dealer, prepare, in cooperation
with Dealer, a private placement memorandum in form and substance reasonably satisfactory to Dealer for companies of a similar size and in a similar industry. 

5. Dealer, itself or through an Affiliate (the “Selling Agent”) or any underwriter(s), will sell all, or such lesser portion
as may be required hereunder, of the Registered Settlement Shares or Unregistered Settlement Shares and any Makewhole Shares (as defined below) (together, the “Settlement Shares”) delivered by Counterparty to Dealer pursuant to
paragraph 6 below commencing on the Cash Settlement Payment Date and continuing until the date on which the aggregate Net Proceeds (as such term is defined below) of such sales, as determined by Dealer, is equal to the absolute value of the Forward
Cash Settlement Amount (such date, the “Final Resale Date”). If Counterparty is prohibited by law or by contract from disclosing all material non-public information known to Counterparty with
respect to Counterparty and the Shares to any potential purchasers of such Settlement Shares, then the sale of such Settlement Shares shall not be required to commence until the earlier of (x) the 30th calendar day immediately following the
Cash Settlement Payment Date and (y) the first date immediately following the Cash Settlement Payment Date on which Counterparty reasonably concludes that it is able to disclose such information. If the proceeds of any sale(s) made by Dealer,
the Selling Agent or any underwriter(s), net of any commercially reasonable fees and commissions (including, without limitation, underwriting or placement fees) customary for similar transactions under the circumstances at the time of the offering,
together with commercially reasonable carrying charges and expenses incurred in connection with the offer and sale of the Shares (including, without limitation, the covering of any over-allotment or short position (syndicate or otherwise)) (the
“Net Proceeds”) exceed the absolute value of the Forward Cash Settlement Amount, Dealer will refund, in USD, such excess to Counterparty on the date that is three (3) Currency Business Days following the Final Resale Date, and,
if any portion of the Settlement Shares remains unsold, Dealer shall return to Counterparty on that date such unsold Shares. 

  
 Annex A-3 







 6. If the Calculation Agent determines in its commercially reasonable discretion that the Net
Proceeds received from the sale of the Registered Settlement Shares or Unregistered Settlement Shares or any Makewhole Shares, if any, pursuant to this paragraph 6 are less than the absolute value of the Forward Cash Settlement Amount (the amount in
USD by which the Net Proceeds are less than the absolute value of the Forward Cash Settlement Amount being the “Shortfall” and the date on which such determination is made, the “Deficiency Determination Date”),
Counterparty shall on the Exchange Business Day next succeeding the Deficiency Determination Date (the “Makewhole Notice Date”) deliver to Dealer, through the Selling Agent, a notice of Counterparty’s election that Counterparty
shall either (i) pay an amount in cash equal to the Shortfall on the day that is one Currency Business Day after the Makewhole Notice Date, or (ii) deliver additional Shares. If Counterparty elects to deliver to Dealer additional Shares,
then Counterparty shall deliver additional Shares in compliance with the terms and conditions of paragraph 3 or paragraph 4 above, as the case may be (the “Makewhole Shares”), on the first Clearance System Business Day which is also
an Exchange Business Day following the Makewhole Notice Date in such number as the Calculation Agent reasonably believes would have a market value on that Exchange Business Day equal to the Shortfall. Such Makewhole Shares shall be sold by Dealer in
accordance with the provisions above; provided that if the sum of the Net Proceeds from the sale of the originally delivered Shares and the Net Proceeds from the sale of any Makewhole Shares is less than the absolute value of the Forward Cash
Settlement Amount then Counterparty shall, at its election, either make such cash payment or deliver to Dealer further Makewhole Shares until such Shortfall has been reduced to zero. 

7. Notwithstanding the foregoing, in no event shall the aggregate number of Settlement Shares for any Transaction be greater than the Reserved
Shares minus the amount of any Shares actually delivered by Counterparty under any other Transaction under this Master Confirmation (the result of such calculation, the “Capped Number”). Counterparty represents and warrants
(which shall be deemed to be repeated on each day that a Transaction is outstanding) that the Capped Number is equal to or less than the number of Shares determined according to the following formula: 

A – B 
  

							
		 	Where	  	A =	  	the number of authorized but unissued shares of Counterparty that are not reserved for future issuance on the date of the determination of the Capped Number; and
				
		 		  	B =	  	the maximum number of Shares required to be delivered to third parties if Counterparty elected Net Share Settlement of all transactions in the Shares (other than Transactions in the Shares under this Master Confirmation) with all
third parties that are then currently outstanding and unexercised.

 “Reserved Shares” means, for each Transaction, as set forth in the Supplemental Confirmation
for such Transaction. 
 If at any time, as a result of this paragraph 7, Counterparty fails to deliver to Dealer any Settlement Shares,
Counterparty shall, to the extent that Counterparty has at such time authorized but unissued Shares not reserved for other purposes, promptly notify Dealer thereof and deliver to Dealer a number of Shares not previously delivered as a result of this
paragraph 7. Counterparty agrees to use its best efforts to cause the number of authorized but unissued Shares to be increased, if necessary, to an amount sufficient to permit Counterparty to fulfill its obligation to deliver any Settlement Shares.


  
 Annex A-4 







 ANNEX B 

COMMUNICATIONS PROCEDURES 

March [•], 2018 
  

	 	I.	Introduction 

 Rambus, Inc. (“Counterparty”) and Citibank, N.A.
(“Dealer”) have adopted these communications procedures (the “Communications Procedures”) in connection with entering into the Master Confirmation (the “Master Confirmation”), dated as of
March 5, 2018, between Dealer and Counterparty relating to Uncollared Accelerated Share Repurchase transactions. These Communications Procedures supplement, form part of, and are subject to the Master Confirmation. 

 

	 	II.	Communications Rules 

 For each Transaction, from the Trade Date for such Transaction
until the date all payments or deliveries of Shares have been made with respect to such Transaction, Counterparty and its Employees and Designees shall not engage in any Program-Related Communication with, or disclose any Material Non-Public Information to, any Trading Personnel. Except as set forth in the preceding sentence, the Master Confirmation shall not limit Counterparty and its Employees and Designees in their communication with
Affiliates and Employees of Dealer, including, without limitation, Employees who are Permitted Contacts. 
  

	 	III.	Termination 

 If, in the reasonable judgment of any Trading Personnel or any Affiliate or
Employee of Dealer participating in any Communication with Counterparty or any Employee or Designee of Counterparty, such Communication would not be permitted by these Communications Procedures, such Trading Personnel or Affiliate or Employee of
Dealer shall immediately terminate such Communication. In such case, or if such Trading Personnel or Affiliate or Employee of Dealer determines following completion of any Communication with Counterparty or any Employee or Designee of Counterparty
that such Communication was not permitted by these Communications Procedures, such Trading Personnel or such Affiliate or Employee of Dealer shall promptly consult with his or her supervisors and with counsel for Dealer regarding such Communication.
If, in the reasonable judgment of Dealer’s counsel following such consultation, there is more than an insignificant risk that such Communication could materially jeopardize the availability of the affirmative defenses provided in Rule 10b5-1 under the Exchange Act with respect to any ongoing or contemplated activities of Dealer or its Affiliates in respect of any Transaction pursuant to the Master Confirmation, it shall be an Additional
Termination Event pursuant to Section 19(a) of the Master Confirmation, with Counterparty as the sole Affected Party and all Transactions under the Master Confirmation as Affected Transactions. 

 

	 	IV.	Definitions 

 Capitalized terms used and not otherwise defined herein shall have the
meanings ascribed to them in the Master Confirmation. As used herein, the following words and phrases shall have the following meanings: 

“Communication” means any contact or communication (whether written, electronic, oral or otherwise) between Counterparty or
any of its Employees or Designees, on the one hand, and Dealer or any of its Affiliates or Employees, on the other hand. 

“Designee” means a person designated, in writing or orally, by Counterparty to communicate with Dealer on behalf of
Counterparty. 
 “Permitted Contact” means any of Peter Barna, Joseph Stoots, Theodore Finkelstein and Dustin Sheppard
or any of their designees; provided that Dealer may amend the list of Permitted Contacts by delivering a revised list of Permitted Contacts to Counterparty (which amended list shall become effective on the third Exchange Business-Day immediately following delivery of such list by Dealer to Counterparty). 

  
 Annex B-1 







 “Trading Personnel” means Poom Kreepok and any other Employee of the public side
of the Strategic Equity Solutions group of Dealer; provided that Dealer may amend the list of Trading Personnel by delivering a revised list of Trading Personnel to Counterparty (which amended list shall become effective on the third Exchange
Business-Day immediately following delivery of such list by Dealer to Counterparty); and provided further that, for the avoidance of doubt, the persons listed as Permitted Contacts are not Trading
Personnel. 
 “Employee” means, with respect to any entity, any owner, principal, officer, director, employee or other
agent or representative of such entity, and any Affiliate of any of such owner, principal, officer, director, employee, agent or representative. 

“Material Non-Public Information” means information relating to Counterparty or the
Shares that (a) has not been widely disseminated by wire service, in one or more newspapers of general circulation, by communication from Counterparty to its shareowners or in a press release, or contained in a public filing made by
Counterparty with the Securities and Exchange Commission and (b) a reasonable investor might consider to be of importance in making an investment decision to buy, sell or hold Shares. For the avoidance of doubt and solely by way of
illustration, information should be presumed “material” if it relates to such matters as dividend increases or decreases, earnings estimates, changes in previously released earnings estimates, significant expansion or curtailment of
operations, a significant increase or decline of orders, significant merger or acquisition proposals or agreements, significant new products or discoveries, extraordinary borrowing, major litigation, liquidity problems, extraordinary management
developments, purchase or sale of substantial assets and similar matters. 
 “Program-Related Communication” means any
Communication the subject matter of which relates to the Master Confirmation or any Transaction under the Master Confirmation or any activities of Dealer (or any of its Affiliates) in respect of the Master Confirmation or any Transaction under the
Master Confirmation. 

  
 Annex B-2