THEODORE BLEGEN - 01 Oct 2021 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role: CFO
Signature: /s/ Saria Tseng, attorney-in-fact for Mr. Bernie Blegen
Issuer symbol: MPWR
Transactions as of: 01 Oct 2021
Net transactions value: -$433,306
Form type: 4
Filing time: 05 Oct 2021, 17:01:48 UTC
Previous filing: 21 Sep 2021
Next filing: 20 Oct 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MPWR	Common Stock	Sale	$433,306	-910	-0.71%	$476.16	127,635	01 Oct 2021	Direct	F1, F2
holding	MPWR	Common Stock						5,331	01 Oct 2021	Irrevocable Trust FBO Theodore F. Blegen
holding	MPWR	Common Stock						5,331	01 Oct 2021	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 $476.15 to $476.16. 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 $476.15 to $476.16. 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.