Haiping Dun insider trades: ACM Research (ACMR) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Haiping reports to the SEC
Open-market buys and sales
22 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 18, 2026 | ACMR | ↓ Sell | 5,000 | $81.13 | $406K | Direct | Aug 20, 2026 (2d) |
| May 19, 2026 | ACMR | ↓ Sell | 5,000 | $66.22 | $331K | Direct | May 21, 2026 (2d) |
| Mar 14, 2025 | ACMR | ↓ Sell | 9,518 | $29.00 | $276K | Direct | Mar 18, 2025 (4d) |
| Mar 10, 2025 | ACMR | ↓ Sell | 15,001 | $26.54 | $398K | Direct | Mar 12, 2025 (2d) |
| Nov 29, 2024 | ACMR | ↓ Sell | 19,058 | $17.43 | $332K | Direct | Dec 3, 2024 (4d) |
| Nov 22, 2024 | ACMR | ↓ Sell | 15,000 | $19.12 | $287K | Direct | Nov 26, 2024 (4d) |
| Aug 29, 2024 | ACMR | ↓ Sell | 19,097 | $18.08 | $345K | Direct | Sep 3, 2024 (5d) |
| Aug 22, 2024 | ACMR | ↓ Sell | 15,000 | $19.85 | $298K | Direct | Aug 26, 2024 (4d) |
| May 29, 2024 | ACMR | ↓ Sell | 19,239 | $22.63 | $435K | Direct | May 31, 2024 (2d) |
| May 22, 2024 | ACMR | ↓ Sell | 15,000 | $22.88 | $343K | Direct | May 24, 2024 (2d) |
| Mar 14, 2024 | ACMR | ↓ Sell | 19,434 | $27.70 | $538K | Direct | Mar 15, 2024 (1d) |
| Mar 8, 2024 | ACMR | ↓ Sell | 15,000 | $30.36 | $455K | Direct | Mar 12, 2024 (4d) |
| Nov 29, 2023 | ACMR | ↓ Sell | 18,984 | $17.25 | $327K | Direct | Dec 1, 2023 (2d) |
| Nov 22, 2023 | ACMR | ↓ Sell | 15,000 | $17.66 | $265K | Direct | Nov 27, 2023 (5d) |
| Aug 22, 2023 | ACMR | ↓ Sell | 32,098 | $13.85 | $445K | Direct | Aug 24, 2023 (2d) |
| Jun 1, 2023 | ACMR | ↓ Sell | 37,500 | $10.00 | $375K | Direct | Jun 5, 2023 (4d) |
| Mar 16, 2023 | ACMR | ↓ Sell | 37,500 | $12.06 | $452K | Direct | Mar 20, 2023 (4d) |
| Nov 30, 2022 | ACMR | ↓ Sell | 35,327 | $8.43 | $298K | Direct | Dec 2, 2022 (2d) |
| Aug 22, 2022 | ACMR | ↓ Sell | 36,537 | $16.10 | $588K | Direct | Aug 24, 2022 (2d) |
| Aug 15, 2022 | ACMR | ↓ Sell | 36,519 | $19.28 | $704K | Direct | Aug 17, 2022 (2d) |
| May 27, 2022 | ACMR | ↓ Sell | 36,150 | $15.00 | $542K | Direct | May 31, 2022 (4d) |
| Mar 9, 2022 | ACMR | ↓ Sell | 12,269 | $82.09 | $1.0M | Direct | Mar 11, 2022 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ACMR insiders
Open-market trades in the last 12 months
About Haiping Dun's insider trades
Haiping Dun is an insider at ACM Research (ACMR). Since Mar 9, 2022, Haiping has reported no open-market purchases and 22 sales worth $9.4M on SEC Form 4. In the last 12 months: 2 sales ($737K).
Their filings also include option exercises (17 filings), shares withheld for taxes (14 filings), grants and awards (8 filings), gifts (2 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 ACMR insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.