Deming Xiao - Aug 16, 2021 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: Aug 16, 2021
Transactions value $: -$2,180,044
Form type: 4
Date filed: 8/23/2021, 05:54 PM
Previous filing: Aug 16, 2021
Next filing: Aug 26, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MPWR	Common Stock	Other	$9.37K	+29	+0.01%	$323.24	304K	Aug 16, 2021	Direct	F1
transaction	MPWR	Common Stock	Sale	-$2.19M	-4.74K	-1.56%	$462.00	299K	Aug 19, 2021	Direct	F2
holding	MPWR	Common Stock						1.1K	Aug 16, 2021	by Spouse

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

Explanation of Responses:

Id	Content
F1	Shares acquired through the Company's qualified ESPP program.
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 $462.00 to $462.04. 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

Shares acquired through the Company's qualified ESPP program.

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 $462.00 to $462.04. 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.