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: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-28	Common Stock	S	36.0	$24.72	Disposed	119723	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-28	Non-Qualified Stock Option (right to buy)	$7.64	A	894.0	Acquired	2014-11-17	Common Stock (894)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$12.42	A	941.0	Acquired	2015-10-22	Common Stock (941)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$14.93	A	329.0	Acquired	2015-01-31	Common Stock (329)	Direct
2013-02-28	Non-Qualified Stock Option (right to buy)	$15.28	A	884.0	Acquired	2014-07-27	Common Stock (884)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3000	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 will vest according to the same vesting schedule as the original grants.