MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2013

Feb 11, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2013-02-07

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-07	Common Stock	A	151.0	$0.0	Acquired	106001.0	Direct
2013-02-11	Common Stock	S	58.0	$24.6	Disposed	105943.0	Direct
2013-02-11	Common Stock	S	1207.0	$24.6	Disposed	104736.0	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	44004.0	Indirect
Common Stock	14371.0	Indirect
Common Stock	14371.0	Indirect

Footnotes

F1: Equitable stock dividend adjustment approved by the Board of Director as a result of dividend Payment to shareholders on December 28, 2012. Stock dividends will release according to the same vesting schedule as the original grants.

F2: Shares sold to pay tax obligations resulting from the release of restricted stock units.