MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2014

Feb 21, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2014-02-18

Reporting Person: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-02-18	Common Stock	J	750.0	$24.429	Acquired	63965	Direct
2014-02-20	Common Stock	S	3368.0	$34.85	Disposed	60597	Direct
2014-02-20	Common Stock	S	750.0	$34.8245	Disposed	59847	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

Footnotes

F1: Acquired through the Company's qualified ESPP program.

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 $34.8202 to $34.8256. 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.