MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2010

Aug 2, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2010-07-30

Reporting Person: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-07-30	Common Stock	S	372	$18.0187	Disposed	33933	Direct
2010-08-02	Common Stock	A	14000	—	Acquired	47933	Direct

Footnotes

F1: Shares sold to pay tax obligations resulting from the vesting of restricted stock.

F2: 1/16 of the Restricted Stock Units shall vest quarterly following the Vesting Commencement Date, provided that the Grantee continues to be a Service Provider from the Grant Date through each applicable vesting date.