Tracy Liu is Director at ACM Research, Inc. (ACMR). They have made 4 open-market trades across 1 company since 2021, most recently 2026-03-11.
CIK 0001721299
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 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ACMR | 155,772 | $6.9M |
Shares reported on the most recent Form 4, priced at the 2026-03-12 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ACMR | SELL | 2026-03-10 | 2026-03-12 | $47.51 | $2.9M | +0.7% | +8.8% | +75.3% |
| ACMR | SELL · 10b5-1 | 2025-09-17 | 2025-09-19 | $33.00 | $495K | +21.6% | +10.5% | +5.0% |
| ACMR | SELL · 10b5-1 | 2025-07-15 | 2025-07-17 | $30.00 | $450K | +5.1% | -16.6% | +30.4% |
| ACMR | SELL · 10b5-1 | 2024-02-28 | 2024-03-01 | $25.20 | $315K | -14.3% | -9.7% | -33.4% |
| ACMR | SELL · 10b5-1 | 2023-12-26 | 2023-12-28 | $20.00 | $200K | +6.0% | -5.8% | +43.9% |
| ACMR | SELL · 10b5-1 | 2023-11-20 | 2023-11-22 | $17.91 | $269K | -8.5% | +5.8% | +4.7% |
| ACMR | SELL | 2021-02-12 | 2021-02-16 | $120.00 | $240K | -28.5% | -34.1% | -52.7% |
| ACMR | SELL | 2021-02-09 | 2021-02-11 | $110.00 | $220K | +7.5% | -21.0% | -46.1% |
| ACMR | SELL | 2021-01-06 | 2021-01-08 | $100.00 | $200K | -2.7% | +4.1% | -12.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.