MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2013

Mar 4, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2013-02-28

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

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-28	Non-Qualified Stock Option (right to buy)	$8.9	A	956.0	Acquired	2015-06-15	Common Stock (956)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$8.9	A	3043.0	Acquired	2015-06-15	Common Stock (3043)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$11.31	A	1882.0	Acquired	2016-10-26	Common Stock (1882)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$14.89	A	1103.0	Acquired	2015-02-08	Common Stock (1103)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$15.03	A	4235.0	Acquired	2015-10-28	Common Stock (4235)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$17.92	A	2682.0	Acquired	2014-08-03	Common Stock (2682)	Direct

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 will vest according to the same vesting schedule as the original grants.