MPWRTechnologyLarge-Cap
MONOLITHIC POWER SYSTEMS, INC. Insider Trading Activity
Every SEC Form 4 insider transaction reported for MONOLITHIC POWER SYSTEMS, INC. (MPWR), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Are MPWR insiders buying or selling?
MONOLITHIC POWER SYSTEMS, INC. insiders reported 0 open-market buys ($0) and 642 sells ($2.1B) across 642 Form 4 filings — a net selling position of $2.1B.
Source: SEC EDGAR Form 4
Key Statistics (as of Jul 17, 2026)
Total Form 4 filings
642
SEC EDGAR
Insider filers
13
Insider buys (0)
$0
Insider sells (642)
$2.1B
Insider sentiment
Net sellingNet insider flow of $2.1B in net selling.
Recent MPWR insider transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 17, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 15.0K | $1349.73 | $20.2M |
| Jul 6, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 30 | $1351.61 | $40.5K |
| Jun 3, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 30 | $1533.95 | $46.0K |
| May 29, 2026 | Saria Tseng | EVP & General Counsel | Sale | 7.6K | $1700.00 | $12.9M |
| May 28, 2026 | Robert W Dean II | Interim CFO | Sale | 22 | $1649.56 | $36.3K |
| May 27, 2026 | Jeff Zhou | Director | Sale | 486 | $1680.00 | $816.5K |
| May 27, 2026 | Saria Tseng | EVP & General Counsel | Sale | 5.0K | $1586.43 | $7.9M |
| May 21, 2026 | Michael Hsing | CEO | Sale | 40.0K | $1482.75 | $59.3M |
| May 20, 2026 | Robert W Dean II | Interim CFO | Sale | 4 | $1563.28 | $6.3K |
| May 19, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 12.0K | $1561.40 | $18.7M |
| May 8, 2026 | Eugen J Elmiger | Director | Sale | 12.0K | $1584.96 | $19.0M |
| May 8, 2026 | Deming Xiao | EVP, Global Operations | Sale | 30.0K | $1654.55 | $49.6M |
| May 8, 2026 | Eileen Wynne | Director | Sale | 335 | $1582.68 | $530.2K |
| May 6, 2026 | Jeff Zhou | Director | Sale | 1.5K | $1607.85 | $2.4M |
| May 6, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 380 | $1583.81 | $601.8K |
| May 6, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 30 | $1588.73 | $47.7K |
| Apr 10, 2026 | Saria Tseng | EVP & General Counsel | Sale | 9.0K | $1305.22 | $11.7M |
| Apr 8, 2026 | Saria Tseng | EVP & General Counsel | Sale | 7.6K | $1167.95 | $8.9M |
| Apr 3, 2026 | Saria Tseng | EVP & General Counsel | Sale | 1.4K | $1133.52 | $1.6M |
| Apr 3, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 30 | $1116.44 | $33.5K |
| Apr 1, 2026 | Saria Tseng | EVP & General Counsel | Sale | 25.7K | $1010.50 | $25.9M |
| Mar 24, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 30 | $1095.07 | $32.9K |
| Feb 17, 2026 | Michael Hsing | CEO | Sale | 33.0K | $1171.83 | $38.7M |
| Feb 13, 2026 | Michael Hsing | CEO | Sale | 33.0K | $1188.92 | $39.2M |
| Feb 13, 2026 | Maurice Sciammas | EVP, WW Sales & Marketing | Sale | 200 | $1179.98 | $236.0K |
Showing the 25 most recent of 642 Form 4 filings for MONOLITHIC POWER SYSTEMS, INC..
Most active MPWR insiders
- Theodore Blegen124 filings
- Maurice Sciammas110 filings
- Saria Tseng104 filings
- Deming Xiao103 filings
- Michael Hsing103 filings
Ask anything about MPWR insider activity
Use Trabud's AI agent to query MONOLITHIC POWER SYSTEMS, INC.'s Form 4 history in plain English — "Show me MPWR CEO purchases this year" or compare it against any other ticker.
Open the AI agentMPWR insider trading FAQ
Are MONOLITHIC POWER SYSTEMS, INC. insiders buying or selling?
Across 642 SEC Form 4 filings, MONOLITHIC POWER SYSTEMS, INC. (MPWR) insiders reported 0 open-market purchases totaling $0 and 642 sales totaling $2.1B. That is a net selling position of $2.1B.
How many insiders trade MPWR stock?
13 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for MONOLITHIC POWER SYSTEMS, INC.. The most recent filing was accepted on Jul 17, 2026.
Where does Trabud get MPWR insider trading data?
All MPWR insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.
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