Peraso Inc. — Director's Dealing 2007

May 12, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MoSys, Inc. (mosy)
CIK: 0000890394
Period of Report: 2007-05-09

Reporting Person: LEUNG WING YU (Director, Executive Vice President & CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-05-09	Common Stock	S	6230	$8.65	Disposed	189450	Direct
2007-05-10	Common Stock	S	6230	$8.34	Disposed	183220	Direct

Footnotes

F1: In addition, Wing-Yu Leung's wife owns 17,900 shares. He has no pecuniary interest in any of these shares and disclaims beneficial ownership of them.