MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2019

Oct 2, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2019-09-30

Reporting Person: Xiao Deming (Pres. of MPS Asia Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-09-30	Common Stock	S	252	$157.49	Disposed	332305	Direct
2019-09-30	Common Stock	S	22677	$156.162	Disposed	309628	Direct
2019-10-01	Common Stock	S	4305	$155.6089	Disposed	305323	Direct
2019-10-01	Common Stock	S	5318	$156.9189	Disposed	300005	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1101	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 $156.00 to $157.35. 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 reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plans.

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 $156.80 to $157.00. 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.