MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2013

Nov 7, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2013-11-05

Reporting Person: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-11-05	Common Stock	S	1816.0	$31.4422	Disposed	54894	Direct
2013-11-05	Common Stock	S	1653.0	$31.4422	Disposed	53241	Direct
2013-11-07	Common Stock	S	694.0	$31.9293	Disposed	52547	Direct
2013-11-07	Common Stock	S	636.0	$31.9293	Disposed	51911	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: The increase in the beneficially owned shares is due to the 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.

F3: In accordance with the reporting person's 10b5-1 trading plan.