MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2012

Aug 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2012-08-09

Reporting Person: Sciammas Maurice (Sr. V.P.of Sales and Marketing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-09	Common Stock	S	1181.0	$20.46	Disposed	121576.0	Direct
2012-08-10	Common Stock	S	702.0	$20.7343	Disposed	120874.0	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	74004.0	Indirect
Common Stock	16371.0	Indirect
Common Stock	16371.0	Indirect

Footnotes

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