MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2013

Aug 6, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2013-08-02

Reporting Person: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-08-02	Common Stock	S	1347.0	$26.1555	Disposed	60765	Direct
2013-08-02	Common Stock	S	1205.0	$26.1555	Disposed	59560	Direct
2013-08-05	Common Stock	S	479.0	$26.1822	Disposed	59081	Direct
2013-08-05	Common Stock	S	437.0	$26.1822	Disposed	58644	Direct
2013-08-06	Common Stock	S	699.0	$26.2443	Disposed	57945	Direct
2013-08-06	Common Stock	S	632.0	$26.2443	Disposed	57313	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

Footnotes

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

F2: In accordance with the reporting person's 10b5-1 trading plan.