Maurice Sciammas - 12 May 2025 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Maurice Sciammas
Issuer symbol
MPWR
Transactions as of
12 May 2025
Transactions value $
-$8,412,000
Form type
4
Filing time
12 May 2025, 18:02:36 UTC
Previous filing
09 May 2025
Next filing
30 May 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sciammas Maurice EVP, WW Sales & Marketing 5808 LAKE WASHINGTON BLVD NE, KIRKLAND /s/ Saria Tseng, attorney-in-fact for Mr. Maurice Sciammas 12 May 2025 0001360833

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPWR Common Stock Sale -$8.41M -12K -74.93% $701.00 4.02K 12 May 2025 By Sciammas Trust 2020
holding MPWR Common Stock 10.9K 12 May 2025 Maurice Sciammas Trust FBO Oski Crew
holding MPWR Common Stock 1.7K 12 May 2025 The Chloe Liliane Sciammas 2020 Irrevocable Trust
holding MPWR Common Stock 2K 12 May 2025 Rosalind Sciammas Family 2021 Trust
holding MPWR Common Stock 5K 12 May 2025 Clement Sciammas Family 2021 Trust
holding MPWR Common Stock 40.1K 12 May 2025 Sciammas Family Trust
holding MPWR Common Stock 102K 12 May 2025 Direct
holding MPWR Common Stock 17.2K 12 May 2025 Various Sciammas GRATs
holding MPWR Common Stock 1.7K 12 May 2025 The Patrick Francis Sciammas 2020 Irrevocable Trust
holding MPWR Common Stock 2K 12 May 2025 Peter Rafferty and Eric Toothill 2021Trust
holding MPWR Common Stock 1.7K 12 May 2025 The Joseph Roger Sciammas 2020 Irrevocable Trust
holding MPWR Common Stock 10.9K 12 May 2025 Christina Sciammas Trust FBO Oski Crew
* 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).