// company-profile
Monolithic Power Systems, Inc. Insider Trading
MPWREvery SEC Form 4 insider trading filing for Monolithic Power Systems, Inc. (MPWR) — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC.
curl "https://api.form4api.com/v1/transactions?ticker=MPWR" -H "X-Api-Key: YOUR_API_KEY"// activity-summary
Mixed insider activity over the last 30 days: 1 purchase and 1 sale (2 transactions total).
// 90-day insight
Over the last 90 days, Monolithic Power Systems, Inc. insiders bought $0 (1 transaction) and sold $81.1M (19 transactions).
- Most active insider: Sciammas Maurice with 29 transactions totaling $33.2M.
- Largest single sale: $12.9M by Tseng Saria on May 27, 2026.
- 58% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bearish — sales outpace buys.
Institutional Ownership
Top 13F-HR holders of Monolithic Power Systems, Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 5, 2026 | DEAN ROBERT W II | MPWR | Sale | 105 | $1344.27 | $141K |
| Aug 4, 2026 | Sciammas Maurice | MPWR | Gift | 25,000 | $0.00 | $0K |
| Aug 4, 2026 | Sciammas Maurice | MPWR | Gift | 25,000 | $0.00 | $0K |
| Aug 3, 2026 | Sciammas Maurice | MPWR | Sale10b5 | 30 | $1343.94 | $40K |
| Jul 25, 2026 | DEAN ROBERT W II | MPWR | Award | 1,359 | $0.00 | $0K |
45 more transactions hidden
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