Michael Hsing - Feb 3, 2022 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 3, 2022
Transactions value $: $0
Form type: 4
Date filed: 2/4/2022, 04:05 PM
Previous filing: Jan 5, 2022
Next filing: Feb 9, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MPWR	Common Stock	Award	$0	+153K	+16.13%	$0.00	1.1M	Feb 3, 2022	Direct	F1
holding	MPWR	Common Stock						133K	Feb 3, 2022	by M Hsing 04 Trust
holding	MPWR	Common Stock						12.8K	Feb 3, 2022	ZH Family 2020 Trust

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

Explanation of Responses:

Id	Content
F1	On February 4, 2020, the reporting person was granted a target of 51,108 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 3, 2022, 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 102,216 additional shares being earned by the reporting person. Of the restricted stock units that were awarded, 76,662 will vest immediately and 76,662 will vest quarterly in the next two years.

Content

On February 4, 2020, the reporting person was granted a target of 51,108 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 3, 2022, 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 102,216 additional shares being earned by the reporting person. Of the restricted stock units that were awarded, 76,662 will vest immediately and 76,662 will vest quarterly in the next two years.