MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2012

Dec 12, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2012-12-11

Reporting Person: Moyer James C (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-11	Common Stock	S	600.0	$21.32	Disposed	462483.0	Indirect
2012-12-12	Common Stock	S	1600.0	$22.1538	Disposed	460883.0	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1006873.0	Direct

Footnotes

F1: In accordance with the reporting person's 10b5-1 trading plan.

F2: The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $21.86 to $22.26. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.