MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2011

Dec 15, 2011

SEC Form 4/A — Form 4/A

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2011-02-08

Reporting Person: Hsing Michael (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-08	Common Stock	A	153000	—	Acquired	436975	Direct

Footnotes

F1: The purpose of this amendment to the Form 4 filed with the SEC on February 8, 2011, is to amend and restate the vesting schedule of the originally time-based Restricted Stock Units ("RSUs") granted to the Reporting Person on February 8, 2011 to a combination of time-based and performance-based vesting. Initially, 100% of the RSUs shall vest quarterly over a four year period following the Vesting Commencement Date, provided that the Grantee continues to be a Service Provider from the Grant Date through each applicable vesting date. Under the revised vesting schedule approved by the Compensation Committee of the Company on December 6, 2011, 50% of the RSUs, shall be subject to satisfaction of performance-based vesting criteria determined by the Compensation Committee of the Company, provided that the Grantee continues to be a Service Provider from the Grant Date through each applicable vesting date.