MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2013

Aug 14, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2013-08-12

Reporting Person: CHANG KUO WEI HERBERT (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-08-12	Common Stock	M	94.0	$19.29	Acquired	63856	Direct
2013-08-12	Common Stock	M	298.0	$22.01	Acquired	64154	Direct
2013-08-12	Common Stock	S	392.0	$29.0	Disposed	63762	Direct
2013-08-13	Common Stock	M	7108.0	$22.01	Acquired	70870	Direct
2013-08-13	Common Stock	S	7108.0	$29.2803	Disposed	63762	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-08-12	Non-Qualified Stock Option (right to buy)	$19.29	M	94.0	Disposed	2017-02-09	Common Stock (94)	Direct
2013-08-12	Non-Qualified Stock Option (right to buy)	$22.01	M	298.0	Disposed	2015-05-22	Common Stock (298)	Direct
2013-08-13	Non-Qualified Stock Option (right to buy)	$22.01	M	7108.0	Disposed	2015-05-22	Common Stock (7108)	Direct

Footnotes

F1: On December 11, 2012, the Company's Board declared a special cash dividend of $1.00 per common share, which was paid on December 28, 2012 to all shareholders of record as of the close of business on December 21, 2012. The Board approved a modification whereby each outstanding option as of December 28, 2012 was increased by a ratio of 1.0471 with a corresponding reduction in the exercise price.

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 $29.25 to $29.35. 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.