SEC Form 4 · accession 0001214659-26-007138
MONOLITHIC POWER SYSTEMS, INC. · MPWR
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Maurice Sciammas
Officer — EVP, WW Sales & Marketing
Period of report
Jun 1, 2026
Accepted (ET)
Jun 3, 2026 · 5:31 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001280452
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Jun 1, 2026 | S | 30 | $1,533.95 | D | 1,179 | I | Clement Sciammas Trust |
| Common Stock | holding | — | — | — | 166,644 | D | ||
| Common Stock | holding | — | — | — | 1,699 | I | The Joseph Roger Sciammas 2020 Irrevocable Trust | |
| Common Stock | holding | — | — | — | 2,000 | I | Rosalind Sciammas Family 2021 Trust | |
| Common Stock | holding | — | — | — | 919 | I | Rosalind Sciammas Brokerage Account | |
| Common Stock | holding | — | — | — | 51,023 | I | Sciammas Family Trust | |
| Common Stock | holding | — | — | — | 12,625 | I | Various Sciammas GRATs | |
| Common Stock | holding | — | — | — | 1,699 | I | The Patrick Francis Sciammas 2020 Irrevocable Trust | |
| Common Stock | holding | — | — | — | 4,015 | I | By Sciammas Trust 2020 | |
| Common Stock | holding | — | — | — | 1,000 | I | Peter Rafferty and Eric Toothill 2021Trust | |
| Common Stock | holding | — | — | — | 1,699 | I | The Chloe Liliane Sciammas 2020 Irrevocable Trust | |
| Common Stock | holding | — | — | — | 5,000 | I | Clement Sciammas Family 2021 Trust |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/19/2025.