David H Wang 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 David reports to the SEC
Open-market buys and sales
17 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Dec 4, 2025 | ACMR | ↓ Sell | 130,000 | $33.55 | $4.4M | Direct | Dec 5, 2025 (1d) |
| Sep 4, 2025 | ACMR | ↓ Sell | 130,000 | $26.61 | $3.5M | Direct | Sep 5, 2025 (1d) |
| May 22, 2025 | ACMR | ↓ Sell | 130,000 | $23.15 | $3.0M | Direct | May 23, 2025 (1d) |
| Mar 13, 2025 | ACMR | ↓ Sell | 131,250 | $27.02 | $3.5M | Direct | Mar 13, 2025 (0d) |
| Nov 29, 2024 | ACMR | ↓ Sell | 56,250 | $17.44 | $981K | Direct | Dec 3, 2024 (4d) |
| Nov 26, 2024 | ACMR | ↓ Sell | 56,250 | $17.89 | $1.0M | Direct | Nov 29, 2024 (3d) |
| Nov 22, 2024 | ACMR | ↓ Sell | 56,250 | $19.08 | $1.1M | Direct | Nov 26, 2024 (4d) |
| May 29, 2024 | ACMR | ↓ Sell | 86,090 | $22.62 | $1.9M | Direct | May 31, 2024 (2d) |
| May 22, 2024 | ACMR | ↓ Sell | 90,000 | $22.81 | $2.1M | Direct | May 24, 2024 (2d) |
| Mar 14, 2024 | ACMR | ↓ Sell | 87,089 | $27.62 | $2.4M | Direct | Mar 15, 2024 (1d) |
| Mar 8, 2024 | ACMR | ↓ Sell | 90,000 | $30.36 | $2.7M | Direct | Mar 12, 2024 (4d) |
| Nov 29, 2023 | ACMR | ↓ Sell | 84,776 | $17.14 | $1.5M | Direct | Dec 1, 2023 (2d) |
| Nov 22, 2023 | ACMR | ↓ Sell | 90,000 | $17.68 | $1.6M | Direct | Nov 27, 2023 (5d) |
| Sep 13, 2023 | ACMR | ↓ Sell | 175,116 | $17.87 | $3.1M | Direct | Sep 14, 2023 (1d) |
| Mar 19, 2021 | ACMR | ↓ Sell | 99,228 | $91.24 | $9.1M | Direct | Mar 22, 2021 (3d) |
| Dec 4, 2020 | ACMR | ↓ Sell | 98,983 | $79.83 | $7.9M | Direct | Dec 7, 2020 (3d) |
| Sep 4, 2020 | ACMR | ↓ Sell | 69,453 | $81.36 | $5.7M | Direct | Sep 4, 2020 (0d) |
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 David H Wang's insider trades
David H Wang is See Remarks at ACM Research (ACMR). Since Sep 4, 2020, David has reported no open-market purchases and 17 sales worth $55.4M on SEC Form 4. In the last 12 months: 1 sale ($4.4M).
Their filings also include option exercises (15 filings), shares withheld for taxes (9 filings), grants and awards (6 filings), conversions (1 filing). 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.