FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Kim Jae 		2. Issuer Name and Ticker or Trading Symbol

RAMBUS INC [ RMBS ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
SVP & GC
(Last)          (First)          (Middle)

1050 ENTERPRISE WAY, SUITE 700 		3. Date of Earliest Transaction (MM/DD/YYYY)

5/15/2015
(Street)

SUNNYVALE, CA 94089
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   5/15/2015     M    3026   A $7.31   27797   D    
Common Stock   5/15/2015     M    3437   A $5.46   31234   D    
Common Stock   5/15/2015     M    2062   A $5.46   33296   D    
Common Stock   5/15/2015     M    5555   A $5.63   38851   D    
Common Stock   5/15/2015     M    2529   A $5.63   41380   D    
Common Stock   5/15/2015     M    3294   A $8.76   44674   D    
Common Stock   5/15/2015     S (1)    21880   D $14.1678   (2) 22794   D    
Common Stock   5/18/2015     S (1)    780   D $14.46   (3) 22014   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy)   $7.31   5/15/2015     M         3026      (4) 2/1/2022   Common Stock   3026   $0   9188   D    
Common Stock (right to buy)   $5.46   5/15/2015     M         3437      (5) 2/1/2023   Common Stock   3437   $0   18527   D    
Common Stock (right to buy)   $5.46   5/15/2015     M         2062      (5) 2/1/2023   Common Stock   2062   $0   11117   D    
Common Stock (right to buy)   $5.63   5/15/2015     M         5555      (6) 8/2/2020   Common Stock   5555   $0   12745   D    
Employee Stock Option (right to buy)   $5.63   5/15/2015     M         2529      (6) 2/1/2021   Common Stock   2529   $0   5804   D    
Common Stock (right to buy)   $8.76   5/15/2015     M         3294      (7) 2/3/2024   Common Stock   3294   $0   39135   D    

Explanation of Responses:
( 1)  The sales reported on this Form 4 are pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2015.
( 2)  The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $14.09 to $14.25. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
( 3)  The sale price reported in Column 4 of Table 1 represents the exact sale price of the shares sold.
( 4)  Ten percent of the shares subject to the option vested on August 1, 2012 and the remaining shares vested monthly thereafter until fully vested on February 1, 2016.
( 5)  Ten percent of the shares subject to the option vested on August 1, 2013 and the remaining shares vested monthly thereafter until fully vested on February 1, 2017.
( 6)  One-third of the shares subject to the option vested on June 22, 2013 and the remaining shares vested monthly thereafter until fully vested on June 22, 2015.
( 7)  Ten percent of the shares subject to the option vested on August 3, 2014 and the remaining shares vested monthly thereafter until fully vested on February 3, 2018.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Kim Jae
1050 ENTERPRISE WAY, SUITE 700
SUNNYVALE, CA 94089

SVP & GC

Signatures
/s/ William Krause, by power of attorney 5/18/2015
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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