Monolithic Power Systems ($MPWR) Insider Trading & Smart Money Activity
Monolithic Power Systems, Inc. ($MPWR) has 1 insider trade, 2 congress trades and 8 13F position changes on file. In the last 12 months on the open market, no insider bought and 1 insider sold ($40.35M), net -$40.35M.
- Insider buyers (12 mo)
- 0
- Insider sellers (12 mo)
- 1
- Net insider $ (12 mo)
- -$40.35M
- Congress trades (12 mo)
- 1
- 13F moves on file
- 8
- Analyst ratings on file
- 0
MPWR insider buying and selling by quarter
| Quarter | Insider buys | Insider sales | Congress buys / sales | 13F added / cut |
|---|---|---|---|---|
| Q1 2026 | 0 | 0 | 0 / 0 | 0 / 0 |
| Q2 2026 | 0 | 0 | 0 / 1 | 2 / 5 |
| Q3 2026 | 0 | 1 · $40.35M | 0 / 0 | 0 / 0 |
| Q4 2026 | 0 | 0 | 0 / 0 | 0 / 1 |
Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.
All MPWR insider, congress, 13F and analyst activity
| Date | Source | Who | Action | Shares | Value / amount | ΔOwn | 1W | 1M | 6M | Filing | Story |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 13F | Y-Intercept (Hong Kong) | Reduced | -12.92K sh | $6.94M | — | ||||||
| Insider | Hsing MichaelCEO | Sell (Open-market sale) 10b5-1 | 30K sh | $40.35M | +9.7% | — | |||||
| Congress | Byron Donalds | Sale | $1,001 - $15,000 | +6.5% | -9.0% | — | |||||
| 13F | Earnest Partners | Reduced | -4.87K sh | $218.29M | +2.6% | +6.6% | — | ||||
| 13F | Lord, Abbett | Added | +111.47K sh | $193.68M | -3.3% | +2.4% | — | ||||
| 13F | Lord, Abbett | Added | +111.47K sh | $168.44M | -3.3% | +2.4% | — | ||||
| 13F | Morgan Stanley | Reduced | -1.12K sh | $468.92K | -2.4% | -4.5% | — | ||||
| 13F | Morgan Stanley | Reduced | -1.12K sh | $387.27K | -2.4% | -4.5% | — | ||||
| 13F | Candriam S.C.A. | Reduced | -25.50K sh | $95.31M | -2.4% | -4.5% | — | ||||
| 13F | Vaughan Nelson Investment Management, L.P. | Reduced | -118.29K sh | $192.63M | +13.5% | +6.0% | -10.7% | Read | |||
| Congress | Tommy Tuberville | Sale | $1,001 - $15,000 | — |
1W / 1M / 6M = how MPWR moved from the trade or filing date.
Insider trading in MPWR: who is buying and selling
| Insider | Role | Trades | Open-market net | Shares held | Last trade |
|---|---|---|---|---|---|
| Hsing Michael | CEO | 1 | -$40.35M | Sep 28, 2026 |
Members of Congress trading MPWR
Institutions moving MPWR (13F)
Frequently asked questions
Are MPWR insiders buying or selling?
Over the last 12 months 0 insiders made 0 open-market purchases worth $0 and 1 insider made 1 open-market sale worth $40.35M, a net -$40.35M.
What is the latest insider trade in MPWR?
Hsing Michael, CEO filed a sell (open-market sale) of 30K sh worth $40.35M on Sep 28, 2026.
Which members of Congress traded MPWR?
2 disclosed trades by Byron Donalds and Tommy Tuberville. The latest was on Jun 5, 2026.
Which institutions changed their MPWR positions?
Recent 13F filers moving the stock include Lord, Abbett, Morgan Stanley, Y-Intercept (Hong Kong), Earnest Partners and Candriam S.C.A..
Other semiconductors stocks
Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.
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