MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2019

Feb 28, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2019-02-25

Reporting Person: Hsing Michael (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-02-25	Common Stock	S	19000	$137.5535	Disposed	1202378	Direct
2019-02-26	Common Stock	S	20558	$137.1051	Disposed	1181820	Direct
2019-02-27	Common Stock	S	35683	$135.075	Disposed	1146137	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	133040	Indirect

Footnotes

F1: Transaction was executed during an authorized trading window in compliance with the Company's Insider Trading Compliance 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 $137.29 to $137.93. 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.

F3: 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 $136.41 to $137.72. 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.

F4: 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 $134.56 to $135.83. 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.