Michael Hsing - 18 Feb 2025 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing
Issuer symbol
MPWR
Transactions as of
18 Feb 2025
Net transactions value
-$3,640,000
Form type
4
Filing time
20 Feb 2025, 19:01:31 UTC
Previous filing
12 Feb 2025
Next filing
18 Aug 2025

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPWR Common Stock Sale $3,640,000 -5,200 -0.62% $700.00 834,898 18 Feb 2025 Direct F1
holding MPWR Common Stock 133,040 18 Feb 2025 by M Hsing 04 Trust
holding MPWR Common Stock 12,825 18 Feb 2025 ZH Family 2020 Trust
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Ending balance includes 27 shares acquired on February 17, 2025 through the Company's qualified ESPP program.