Sotheara Cheav is See remarks at ACM Research, Inc. (ACMR). They have made 7 open-market trades across 1 company since 2020, most recently 2026-06-05.
CIK 0001721279
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ACMR | 100,002 | $4.4M |
Shares reported on the most recent Form 4, priced at the 2026-06-05 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ACMR | SELL · 10b5-1 | 2026-06-04 | 2026-06-05 | $84.58 | $1.6M | +16.9% | +19.6% | -15.7% |
| ACMR | SELL · 10b5-1 | 2025-09-18 | 2025-09-19 | $35.00 | $350K | +21.6% | +10.5% | +5.0% |
| ACMR | SELL · 10b5-1 | 2025-08-22 | 2025-08-26 | $30.00 | $335K | -7.6% | +30.0% | +9.7% |
| ACMR | SELL · 10b5-1 | 2025-02-06 | 2025-02-10 | $23.00 | $520K | +13.5% | +19.8% | +7.3% |
| ACMR | SELL · 10b5-1 | 2024-03-13 | 2024-03-15 | $28.29 | $424K | +4.2% | +2.4% | -7.6% |
| ACMR | SELL · 10b5-1 | 2023-11-13 | 2023-11-15 | $16.79 | $437K | -4.3% | -0.4% | +2.3% |
| ACMR | SELL | 2023-06-06 | 2023-06-08 | $10.00 | $390K | +9.7% | +22.6% | +79.7% |
| ACMR | SELL | 2022-08-18 | 2022-08-22 | $17.50 | $175K | -0.4% | -7.6% | -46.1% |
| ACMR | SELL | 2022-08-16 | 2022-08-18 | $18.42 | $568K | -2.8% | -12.7% | -49.7% |
| ACMR | SELL | 2021-04-08 | 2021-04-12 | $86.96 | $2.7M | +0.3% | -22.0% | +11.8% |
| ACMR | SELL | 2021-03-15 | 2021-03-16 | $92.68 | $1.9M | -8.6% | -10.6% | +5.7% |
| ACMR | SELL | 2020-11-12 | 2020-11-16 | $88.26 | $2.6M | +2.2% | -9.0% | +70.9% |
| ACMR | SELL | 2020-09-10 | 2020-09-14 | $64.70 | $963K | -4.2% | +2.9% | +2.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.