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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
890394	Mosys Inc.	MOSY	Semiconductors & Related Devices (3674)	770291941

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
901719	E Carl Berg	C/O Berg &Amp; Berg Developers 10050 Bandley Dr Cupertino CA 95014		Yes	No	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	Acquisiton	2010-12-10	230,000	$4.38	354,998	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	1,263,437	Direct
Common Stock	169,998	Direct

Footnotes

THESE SECURITIES ARE OWNED BY CARL E. BERG, THE DESIGNATED BENEFICIAL OWNER FOR THE REPORTING GROUP. THE DESIGNATED BENEFICIAL OWNER DISCLAIMS BENEFICIAL OWNERSHIP EXCEPT TO THE EXTENT OF HIS RESPECTIVE PECUNIARY INTERESTS THEREIN.
THESE SECURITIES ARE OWNED BY BERG & BERG ENTERPRISES, LLC ("BB"), A MEMBER OF THE REPORTING GROUP. THE DESIGNATED BENEFICIAL OWNER DISCLAIMS BENEFICIAL OWNERSHIP EXCEPT TO THE EXTENT OF THEIR RESPECTIVE PECUNIARY INTERESTS THEREIN.
THESE SECURITIES ARE OWNED BY MARY ANN BERG, THE WIFE OF THE DESIGNATED BENEFICIAL OWNER. CARL E. BERG DISCLAIMS BENEFICIAL OWNERSHIP OF THESE SHARES HELD BY HIS WIFE AS HE HAS NO ECONOMIC INTEREST IN ANY OF THESE SHARES.