RAMBUS INC — Director's Dealing 2010

Jan 4, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: RAMBUS INC (RMBS)
CIK: 0000917273
Period of Report: 2010-01-04

Reporting Person: HOROWITZ MARK (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-01-04	Common Stock	S	17333	$24.7345	Disposed	89906	Indirect
2010-01-04	Common Stock	S	1100	$23.3191	Disposed	88806	Indirect
2010-01-04	Common Stock	S	1567	$22.5113	Disposed	87239	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1002702	Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 5, 2009.

F2: The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $23.94 to $24.90 per share. 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.

F3: Shares held directly by the Mark Horowitz & Jody Buckley Living Trust dated June 21, 2003 for which the Reporting Person serves as a trustee.

F4: The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $22.92 to $23.89.

F5: The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $22.14 to $22.88.