Maurice Sciammas insider trades: Monolithic Power Systems (MPWR) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Maurice reports to the SEC
Open-market buys and sales
312 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 3, 2026 | MPWR | ↓ Sell10b5-1 | 30 | $1343.94 | $40K | Clement Sciammas Trust | Aug 5, 2026 (2d) |
| Jul 15, 2026 | MPWR | ↓ Sell10b5-1 | 15,000 | $1349.73 | $20.2M | Direct | Jul 17, 2026 (2d) |
| Jul 1, 2026 | MPWR | ↓ Sell10b5-1 | 30 | $1351.61 | $41K | Clement Sciammas Trust | Jul 6, 2026 (5d) |
| Jun 1, 2026 | MPWR | ↓ Sell10b5-1 | 30 | $1533.95 | $46K | Clement Sciammas Trust | Jun 3, 2026 (2d) |
| May 15, 2026 | MPWR | ↓ Sell10b5-1 | 12,000 | $1561.40 | $18.7M | Direct | May 19, 2026 (4d) |
| May 5, 2026 | MPWR | ↓ Sell | 380 | $1583.81 | $602K | Rosalind Sciammas Brokerage Account | May 6, 2026 (1d) |
| May 4, 2026 | MPWR | ↓ Sell10b5-1 | 30 | $1588.73 | $48K | Clement Sciammas Trust | May 6, 2026 (2d) |
| Apr 1, 2026 | MPWR | ↓ Sell10b5-1 | 30 | $1116.44 | $33K | Clement Sciammas Trust | Apr 3, 2026 (2d) |
| Mar 20, 2026 | MPWR | ↓ Sell10b5-1 | 30 | $1095.07 | $33K | Clement Sciammas Trust | Mar 24, 2026 (4d) |
| Feb 11, 2026 | MPWR | ↓ Sell | 200 | $1179.97 | $236K | Clement Sciammas Trust | Feb 12, 2026 (1d) |
| Feb 6, 2026 | MPWR | ↓ Sell | 22,875 | $1171.16 | $26.8M | Direct | Feb 10, 2026 (4d) |
| Nov 24, 2025 | MPWR | ↓ Sell | 3,976 | $895.23 | $3.6M | Direct | Nov 25, 2025 (1d) |
| Nov 19, 2025 | MPWR | ↓ Sell | 27,966 | $881.66 | $24.7M | Direct | Nov 20, 2025 (1d) |
| Nov 19, 2025 | MPWR | ↓ Sell | 7,034 | $870.21 | $6.1M | Direct | Nov 20, 2025 (1d) |
| Nov 5, 2025 | MPWR | ↓ Sell | 200 | $986.81 | $197K | Rosalind Sciammas Brokerage Account | Nov 6, 2025 (1d) |
| May 12, 2025 | MPWR | ↓ Sell | 12,000 | $701.00 | $8.4M | By Sciammas Trust 2020 | May 12, 2025 (0d) |
| Feb 10, 2025 | MPWR | ↓ Sell | 662 | $717.10 | $475K | Direct | Feb 12, 2025 (2d) |
| Feb 7, 2025 | MPWR | ↓ Sell | 7,000 | $701.98 | $4.9M | By Sciammas Trust 2020 | Feb 11, 2025 (4d) |
| Nov 8, 2024 | MPWR | ↓ Sell | 866 | $765.14 | $663K | Direct | Nov 13, 2024 (5d) |
| Oct 7, 2024 | MPWR | ↓ Sell | 11,000 | $929.59 | $10.2M | Direct | Oct 8, 2024 (1d) |
| Aug 8, 2024 | MPWR | ↓ Sell | 859 | $778.39 | $669K | Direct | Aug 12, 2024 (4d) |
| Jul 22, 2024 | MPWR | ↓ Sell | 3,205 | $831.58 | $2.7M | Direct | Jul 24, 2024 (2d) |
| Jul 8, 2024 | MPWR | ↓ Sell | 10,999 | $843.83 | $9.3M | Direct | Jul 10, 2024 (2d) |
| May 8, 2024 | MPWR | ↓ Sell | 869 | $690.00 | $600K | Direct | May 9, 2024 (1d) |
| Apr 8, 2024 | MPWR | ↓ Sell | 11,000 | $681.83 | $7.5M | Direct | Apr 9, 2024 (1d) |
| Feb 8, 2024 | MPWR | ↓ Sell | 859 | $680.00 | $584K | Direct | Feb 9, 2024 (1d) |
| Feb 5, 2024 | MPWR | ↓ Sell | 982 | $641.00 | $629K | Direct | Feb 7, 2024 (2d) |
| Jan 12, 2024 | MPWR | ↓ Sell | 11,000 | $582.11 | $6.4M | Direct | Jan 12, 2024 (0d) |
| Jan 4, 2024 | MPWR | ↓ Sell | 27,659 | $583.14 | $16.1M | Direct | Jan 8, 2024 (4d) |
| Nov 8, 2023 | MPWR | ↓ Sell | 859 | $490.39 | $421K | Direct | Nov 9, 2023 (1d) |
| Nov 6, 2023 | MPWR | ↓ Sell | 982 | $492.92 | $484K | Direct | Nov 7, 2023 (1d) |
| Oct 2, 2023 | MPWR | ↓ Sell | 4,305 | $458.30 | $2.0M | Direct | Oct 4, 2023 (2d) |
| Aug 8, 2023 | MPWR | ↓ Sell | 874 | $530.26 | $463K | Direct | Aug 10, 2023 (2d) |
| Aug 4, 2023 | MPWR | ↓ Sell | 988 | $526.52 | $520K | Direct | Aug 7, 2023 (3d) |
| Jul 21, 2023 | MPWR | ↓ Sell | 9,843 | $534.23 | $5.3M | Direct | Jul 25, 2023 (4d) |
| Jul 3, 2023 | MPWR | ↓ Sell | 4,305 | $537.79 | $2.3M | Direct | Jul 5, 2023 (2d) |
| May 9, 2023 | MPWR | ↓ Sell | 857 | $409.78 | $351K | Direct | May 10, 2023 (1d) |
| May 4, 2023 | MPWR | ↓ Sell | 991 | $459.60 | $455K | Direct | May 5, 2023 (1d) |
| May 3, 2023 | MPWR | ↓ Sell | 3,462 | $463.55 | $1.6M | Direct | May 4, 2023 (1d) |
| Apr 3, 2023 | MPWR | ↓ Sell | 4,360 | $487.99 | $2.1M | Direct | Apr 6, 2023 (3d) |
| Feb 15, 2023 | MPWR | ↓ Sell | 13,000 | $519.54 | $6.8M | Direct | Feb 17, 2023 (2d) |
| Feb 13, 2023 | MPWR | ↓ Sell | 1,639 | $492.31 | $807K | Direct | Feb 13, 2023 (0d) |
| Feb 8, 2023 | MPWR | ↓ Sell | 6,922 | $462.41 | $3.2M | Direct | Feb 10, 2023 (2d) |
| Feb 6, 2023 | MPWR | ↓ Sell | 723 | $446.87 | $323K | Direct | Feb 8, 2023 (2d) |
| Jan 3, 2023 | MPWR | ↓ Sell | 5,528 | $344.96 | $1.9M | Direct | Jan 5, 2023 (2d) |
| Nov 22, 2022 | MPWR | ↓ Sell | 5,200 | $369.27 | $1.9M | Direct | Nov 25, 2022 (3d) |
| Nov 15, 2022 | MPWR | ↓ Sell | 1,664 | $392.88 | $654K | Direct | Nov 16, 2022 (1d) |
| Nov 7, 2022 | MPWR | ↓ Sell | 4,000 | $355.74 | $1.4M | Direct | Nov 9, 2022 (2d) |
| Nov 4, 2022 | MPWR | ↓ Sell | 982 | $343.98 | $338K | Direct | Nov 7, 2022 (3d) |
| Oct 3, 2022 | MPWR | ↓ Sell | 4,305 | $372.60 | $1.6M | Direct | Oct 4, 2022 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MPWR insiders
Open-market trades in the last 12 months
About Maurice Sciammas's insider trades
Maurice Sciammas is EVP, WW Sales & Marketing at Monolithic Power Systems (MPWR). Since May 4, 2006, Maurice has reported no open-market purchases and 312 sales worth $364.5M on SEC Form 4. In the last 12 months: 14 sales ($101.2M).
9 sales (11% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include option exercises (37 filings), grants and awards (34 filings), gifts (21 filings), other transactions (7 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MPWR insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.