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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
917273	Rambus Inc	RMBS	Semiconductors & Related Devices (3674)	943112828

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1232250	R Thomas Lavelle	4440 El Camino Real Los Altos CA 94022	Sr. Vp And General Counsel	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2010-05-04	9,206	$23.86	63,155	No	4	S	Direct
Common Stock	Disposition	2010-05-05	11,220	$23.71	51,935	No	4	S	Direct
Common Stock	Disposition	2010-05-05	3,212	$24.17	0	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct
No	4	S	Indirect	See Footnote

Footnotes

The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $23.86 to $23.87 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.
3213 shares of Rambus common stock were previously reported as an indirect holding of shares held by the Thomas & Gayle Lavelle Family Trust for which the Reporting Person served as a trustee. These shares were subsequently transferred to an individual account held directly by the Reporting Person.
The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $23.70 to $23.74.
The sale price reported in column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $24.1650 to $24.17.
3212 shares of Rambus common stock were previously reported as an indirect holding of shares held by the Thomas & Gayle Lavelle Family Trust for which the Reporting Person served as a trustee. These shares were subsequently transferred to an individual account held directly by the Reporting Person's spouse.