MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2019

Jul 2, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2019-06-27

Reporting Person: Sciammas Maurice (Sr. V.P.of Sales and Marketing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-06-27	Common Stock	S	4674	$130.1956	Disposed	393823	Direct
2019-06-27	Common Stock	S	3305	$132.36	Disposed	390518	Direct
2019-06-28	Common Stock	S	200	$137.435	Disposed	390318	Direct
2019-06-28	Common Stock	S	4036	$136.3473	Disposed	386282	Direct
2019-07-01	Common Stock	S	5425	$139.5561	Disposed	380857	Direct
2019-07-01	Common Stock	S	711	$138.5214	Disposed	380146	Direct
2019-07-01	Common Stock	S	1980	$140.1877	Disposed	378166	Direct
2019-07-01	Common Stock	S	278	$141.4829	Disposed	377888	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

Footnotes

F1: In accordance with the reporting person's 10b5-1 trading 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 $130.00 to $130.49. 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 $132.04 to $132.71. 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 $137.40 to $137.47. 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.

F5: 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 $136.00 to $137.33 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.

F6: The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plans.

F7: 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 $137.55 to $140.00 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.

F8: 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 $140.01 to $140.53. 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.

F9: 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 $140.73 to $143.54. 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.