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Michael Hsing Insider Trading Activity
Every SEC Form 4 transaction reported by Michael Hsing, sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Is Michael Hsing buying or selling?
Michael Hsing reported 0 open-market buys ($0) and 109 sells ($897.3M) across 109 Form 4 filings at 1 company — a net selling position of $897.3M.
Source: SEC EDGAR Form 4
What stands out
- All 109 of Michael Hsing's Form 4 filings are for one company, MONOLITHIC POWER SYSTEMS INC (MPWR).
- The most recent Form 4 was accepted on Sep 30, 2026 (18 days ago).
- In the last 12 months: no open-market purchases and 8 sales ($354.8M).
- The largest open-market sale in the last 12 months was $64.3M of MONOLITHIC POWER SYSTEMS INC (MPWR) on Feb 10, 2026. SEC ↗
Key Statistics (as of Sep 30, 2026)
Total Form 4 filings
109
SEC EDGAR
Companies
1
Buys (0)
$0
Sells (109)
$897.3M
Insider sentiment
Net sellingNet insider flow of $897.3M in net selling, filed between Feb 5, 2018 – Sep 30, 2026.
Companies Michael Hsing files for
| # | Company | Form 4 filings |
|---|---|---|
| 1 | MPWRMONOLITHIC POWER SYSTEMS INC | 109 |
Recent Michael Hsing transactions
| Date | Ticker | Role | Type | Shares | Value | Filing |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | MPWR | CEO | Sale | 30.0K | $40.3M | SEC ↗ |
| May 21, 2026 | MPWR | CEO | Sale | 40.0K | $59.3M | SEC ↗ |
| Feb 17, 2026 | MPWR | CEO | Sale | 33.0K | $38.7M | SEC ↗ |
| Feb 13, 2026 | MPWR | CEO | Sale | 33.0K | $39.2M | SEC ↗ |
| Feb 12, 2026 | MPWR | CEO | Sale | 34.0K | $38.8M | SEC ↗ |
| Feb 10, 2026 | MPWR | CEO | Sale | 54.9K | $64.3M | SEC ↗ |
| Nov 13, 2025 | MPWR | CEO | Sale | 37.0K | $35.7M | SEC ↗ |
| Nov 13, 2025 | MPWR | CEO | Sale | 40.0K | $38.3M | SEC ↗ |
| Aug 18, 2025 | MPWR | CEO | Sale | 20.2K | $16.8M | SEC ↗ |
| Feb 21, 2025 | MPWR | CEO | Sale | 5.2K | $3.6M | SEC ↗ |
| Feb 12, 2025 | MPWR | CEO | Sale | 2.6K | $1.9M | SEC ↗ |
| Feb 11, 2025 | MPWR | CEO | Sale | 12.0K | $8.4M | SEC ↗ |
| Jan 28, 2025 | MPWR | CEO | Sale | 3.6K | $2.5M | SEC ↗ |
| Nov 13, 2024 | MPWR | CEO | Sale | 2.8K | $2.2M | SEC ↗ |
| Aug 13, 2024 | MPWR | CEO | Sale | 4.3K | $3.5M | SEC ↗ |
| Aug 12, 2024 | MPWR | CEO | Sale | 2.8K | $2.2M | SEC ↗ |
| Jul 24, 2024 | MPWR | CEO | Sale | 9.6K | $8.0M | SEC ↗ |
| Jul 2, 2024 | MPWR | CEO | Sale | 2.7K | $2.1M | SEC ↗ |
| Jun 5, 2024 | MPWR | CEO | Sale | 8.0K | $5.8M | SEC ↗ |
| May 9, 2024 | MPWR | CEO | Sale | 2.8K | $1.9M | SEC ↗ |
| May 3, 2024 | MPWR | CEO | Sale | 8.0K | $5.3M | SEC ↗ |
| Apr 3, 2024 | MPWR | CEO | Sale | 8.0K | $5.4M | SEC ↗ |
| Mar 4, 2024 | MPWR | CEO | Sale | 8.0K | $5.8M | SEC ↗ |
| Feb 9, 2024 | MPWR | CEO | Sale | 2.8K | $1.9M | SEC ↗ |
| Feb 7, 2024 | MPWR | CEO | Sale | 3.8K | $2.4M | SEC ↗ |
Showing the 25 most recent filings of 109. Screen every filing.
Michael Hsing insider trading FAQ
Is Michael Hsing buying or selling?
Across 109 SEC Form 4 filings, Michael Hsing reported 0 open-market purchases totaling $0 and 109 sales totaling $897.3M — a net selling position of $897.3M.
Which companies does Michael Hsing file Form 4s for?
Michael Hsing has reported insider transactions at 1 company, most often MONOLITHIC POWER SYSTEMS INC (MPWR).
How far back does Michael Hsing's filing history go?
Trabud holds Michael Hsing's SEC Form 4 filings from Feb 5, 2018 – Sep 30, 2026, sourced directly from SEC EDGAR.
Where does Trabud get Michael Hsing's insider trading data?
Directly from SEC EDGAR Form 4 filings. Every transaction on this page is a real filing accepted by the SEC, updated as new filings arrive.
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