MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2014

Jun 9, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2014-06-05

Reporting Person: Sciammas Maurice (Sr. V.P.of Sales and Marketing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-06-05	Common Stock	M	5013.0	$15.03	Acquired	91338	Direct
2014-06-05	Common Stock	S	5013.0	$40.0205	Disposed	86325	Direct
2014-06-06	Common Stock	M	9987.0	$15.03	Acquired	96312	Direct
2014-06-06	Common Stock	S	9987.0	$40.151	Disposed	86325	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-06-05	Non-Qualified Stock Option (right to buy)	$15.74	M	5013.0	Disposed	2015-10-28	Common Stock (5013)	Direct
2014-06-06	Non-Qualified Stock Option (right to buy)	$15.74	M	9987.0	Disposed	2015-10-28	Common Stock (9987)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

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

F3: 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 $40.00 to $40.04. 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.

F4: 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 $40.00 to $40.53. 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.