Michael Hsing - Feb 6, 2023 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role: CEO, Director
Signature: /s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing
Stock symbol: MPWR
Transactions as of: Feb 6, 2023
Transactions value $: -$1,649,434
Form type: 4
Date filed: 2/8/2023, 05:54 PM
Previous filing: Jan 5, 2023
Next filing: Feb 10, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MPWR	Common Stock	Sale	-$1.65M	-3.69K	-0.38%	$446.88	977K	Feb 6, 2023	Direct	F1
transaction	MPWR	Common Stock	Award	$0	+113K	+11.55%	$0.00	1.09M	Feb 7, 2023	Direct	F2
holding	MPWR	Common Stock						133K	Feb 6, 2023	by M Hsing 04 Trust
holding	MPWR	Common Stock						12.8K	Feb 6, 2023	ZH Family 2020 Trust

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.
F2	On February 2, 2021, the reporting person was granted a target of 37,613 shares of restricted stock units, with the right to earn up to 300% of the target shares, subject to satisfaction of pre-determined, performance-based vesting criteria. On February 7, 2023, the Company's Compensation Committee of the Board of Directors determined and approved the achievement of the performance criteria for the restricted stock units, which resulted in 75,226 additional shares being earned by the reporting person. Of the 112,839 restricted stock units that were awarded, 56,420 will vest immediately and 56,419 will vest quarterly in the next two years.

Content

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

On February 2, 2021, the reporting person was granted a target of 37,613 shares of restricted stock units, with the right to earn up to 300% of the target shares, subject to satisfaction of pre-determined, performance-based vesting criteria. On February 7, 2023, the Company's Compensation Committee of the Board of Directors determined and approved the achievement of the performance criteria for the restricted stock units, which resulted in 75,226 additional shares being earned by the reporting person. Of the 112,839 restricted stock units that were awarded, 56,420 will vest immediately and 56,419 will vest quarterly in the next two years.