Maurice Sciammas - 13 Nov 2025 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role
EVP, WW Sales & Marketing
Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Maurice Sciammas
Issuer symbol
MPWR
Transactions as of
13 Nov 2025
Net transactions value
$0
Form type
4
Filing time
14 Nov 2025, 18:31:09 UTC
Previous filing
06 Nov 2025
Next filing
20 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sciammas Maurice EVP, WW Sales & Marketing 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH /s/ Saria Tseng, attorney-in-fact for Mr. Maurice Sciammas 13 Nov 2025 0001360833

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPWR Common Stock Gift $0 -4,530 -15% $0.000000 26,660 13 Nov 2025 Various Sciammas GRATs F1
transaction MPWR Common Stock Gift $0 +4,530 +10% $0.000000 49,460 13 Nov 2025 Sciammas Family Trust F2
holding MPWR Common Stock 1,699 13 Nov 2025 The Joseph Roger Sciammas 2020 Irrevocable Trust
holding MPWR Common Stock 2,000 13 Nov 2025 Rosalind Sciammas Family 2021 Trust
holding MPWR Common Stock 1,499 13 Nov 2025 Clement Sciammas Brokerage Account
holding MPWR Common Stock 1,299 13 Nov 2025 Rosalind Sciammas Brokerage Account
holding MPWR Common Stock 183,306 13 Nov 2025 Direct
holding MPWR Common Stock 1,699 13 Nov 2025 The Patrick Francis Sciammas 2020 Irrevocable Trust
holding MPWR Common Stock 4,015 13 Nov 2025 By Sciammas Trust 2020
holding MPWR Common Stock 5,000 13 Nov 2025 Clement Sciammas Family 2021 Trust
holding MPWR Common Stock 1,000 13 Nov 2025 Peter Rafferty and Eric Toothill 2021Trust
holding MPWR Common Stock 1,699 13 Nov 2025 The Chloe Liliane Sciammas 2020 Irrevocable Trust
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 4,530 shares were transferred from two GRATs, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer.
F2 4,530 shares were received by the Sciammas Family Trust, on which the reporting person is a Trustee, and transferred from two GRATs, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer.