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: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-02-02	Common Stock	A	90284	—	Acquired	348079	Direct
2016-02-04	Common Stock	S	22057	$57.9337	Disposed	326022	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

Footnotes

F1: On February 4, 2014, the reporting person was granted a target of 32,831 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 57,453 additional shares being achieved and granted to the reporting person. Of the restricted stock units that were awarded, 45,143 will vest immediately and 45,141 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.