SEC Form 4 · accession 0001280452-15-000198

MONOLITHIC POWER SYSTEMS, INC. · MPWR

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — Sr. V.P.of Sales and Marketing

Period of report

Dec 17, 2015

Accepted (ET)

Dec 21, 2015 · 5:12 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001280452

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1	Dec 17, 2015	M	43,200	$0.00	A	338,312	D
Common Stock	holding	—	—		—	2,000	I	by Family Trust

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Performance Shares^F1,F2	—	Dec 17, 2015	M	43,200	D	—	—	Common Stock	43,200	0	D

F1Each performance share represents a contingent right to receive a restricted stock unit upon MPWR's common stock achieving a 20-day average closing price of $56.00 per share from January 1, 2014 through December 31, 2018 (the "Performance Period"). Credited performance units are still subject to an additional, quarterly, five-year time-based vesting schedule beginning January 1, 2019, subject to acceleration under certain circumstances.
F2Each performance unit will vest as follows: one share of MPWR common stock will be credited for each performance unit if the price of MPWR common stock achieves a 20-day average closing price of $40.00 per share from January 1, 2014 through December 31, 2018 (the "Performance Period"), and up to four additional shares will be credited for each performance unit if the 20-day average closing price reaches $43.00, $47.00, $52.00 and $56.00 (that is, one share per price level) during the Performance Period. Credited performance units are then subject to an additional, quarterly, five-year time-based vesting schedule beginning January 1, 2019, subject to acceleration under certain circumstances.