MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2016

Feb 4, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2016-02-02

Reporting Person: Hsing Michael (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-02-02	Common Stock	A	337002.0	$0.0	Acquired	1477032	Direct
2016-02-04	Common Stock	S	88849.0	$57.9337	Disposed	1388183	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	29000	Indirect
Common Stock	133040	Indirect

Footnotes

F1: On February 4, 2014, the reporting person was granted a target of 122,546 shares of restricted stock units subject to satisfaction of pre-determined, performance-based vesting criteria. On February 2, 2016, the Company's Board of Directors determined that those performance criteria for the restricted stock units had been satisfied, which resulted in 214,456 additional shares being achieved and granted to the reporting person. Of the restricted stock units that were awarded, 168,501 will vest immediately and 168,501 will vest quarterly in the next two years.

F2: The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plans.