MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2014

Aug 8, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2014-08-06

Reporting Person: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-08-06	Common Stock	S	646.0	$42.3624	Disposed	41518	Direct
2014-08-06	Common Stock	S	705.0	$41.8497	Disposed	40813	Direct
2014-08-08	Common Stock	S	1453.0	$42.04	Disposed	39360	Direct
2014-08-08	Common Stock	S	69.0	$42.04	Disposed	39291	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

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 $41.94 to $42.59. 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.

F3: Shares sold to pay tax obligations resulting from the vesting of restricted stock units.