Deming Xiao - Feb 3, 2022 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role: Pres. of MPS Asia Operations
Signature: /s/ Saria Tseng, attorney-in-fact for Mr. Deming Xiao
Stock symbol: MPWR
Transactions as of: Feb 3, 2022
Transactions value $: $0
Form type: 4
Date filed: 2/4/2022, 04:07 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	+39.7K	+14.67%	$0.00	310K	Feb 3, 2022	Direct	F1
holding	MPWR	Common Stock						455	Feb 3, 2022	by Spouse	F2

* 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 13,233 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 26,466 additional shares being earned by the reporting person. Of the restricted stock units that were awarded, 19,851 will vest immediately and 19,848 will vest quarterly in the next two years.
F2	Ending balance was reduced by 646 to reflect the cancelled unvested RSU awards.

Content

On February 4, 2020, the reporting person was granted a target of 13,233 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 26,466 additional shares being earned by the reporting person. Of the restricted stock units that were awarded, 19,851 will vest immediately and 19,848 will vest quarterly in the next two years.

Ending balance was reduced by 646 to reflect the cancelled unvested RSU awards.