Theodore Blegen - Apr 3, 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: Apr 3, 2023
Transactions value $: -$448,951
Form type: 4
Date filed: 4/6/2023, 04:48 PM
Previous filing: Feb 21, 2023
Next filing: May 4, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MPWR	Common Stock	Sale	-$449K	-920	-0.7%	$487.99	131K	Apr 3, 2023	Direct	F1, F2
holding	MPWR	Common Stock						5.33K	Apr 3, 2023	Irrevocable Trust FBO Theodore F. Blegen
holding	MPWR	Common Stock						5.33K	Apr 3, 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	The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.
F2	The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $487.99 to $488.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

Content

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

The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $487.99 to $488.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.