Theodore Blegen - May 2, 2023 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role: CFO
Signature: /s/ Saria Tseng, attorney-in-fact for Mr. Bernie Blegen
Stock symbol: MPWR
Transactions as of: May 2, 2023
Transactions value $: -$1,330,389
Form type: 4
Date filed: 5/4/2023, 04:42 PM
Previous filing: Apr 6, 2023
Next filing: May 5, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MPWR	Common Stock	Award	$0	+5.71K	+4.36%	$0.00	137K	May 2, 2023	Direct	F1
transaction	MPWR	Common Stock	Sale	-$1.33M	-2.87K	-2.1%	$463.55	134K	May 3, 2023	Direct	F2
holding	MPWR	Common Stock						5.33K	May 2, 2023	Irrevocable Trust FBO Theodore F. Blegen
holding	MPWR	Common Stock						5.33K	May 2, 2023	Irrevocable Trust FBO Sarah N. Blegen

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

Explanation of Responses:

Id	Content
F1	On February 2, 2021, the reporting person was granted a target number of 5,714 performance units that can be earned subject to the achievement of two performance goals related to certain environmental objectives, with a performance period through December 31, 2023. The performance units vest upon achievement of the goals, but no earlier than December 31, 2022. Once vested, the performance units have a post-vesting sales restriction period of one year. On May 2, 2023, the Compensation Committee of the Board of Directors determined that the environmental goals had been satisfied, which resulted in 5,714 units being credited with the vesting terms described above.
F2	The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.

Content

On February 2, 2021, the reporting person was granted a target number of 5,714 performance units that can be earned subject to the achievement of two performance goals related to certain environmental objectives, with a performance period through December 31, 2023. The performance units vest upon achievement of the goals, but no earlier than December 31, 2022. Once vested, the performance units have a post-vesting sales restriction period of one year. On May 2, 2023, the Compensation Committee of the Board of Directors determined that the environmental goals had been satisfied, which resulted in 5,714 units being credited with the vesting terms described above.

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