Mark McKechnie files SEC Form 4 disclosures for ACM Research, Inc.. They have made 8 open-market trades across 1 company since 2020, most recently 2026-08-20.
CIK 0001775007
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 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ACMR | 900 | $48K |
Shares reported on the most recent Form 4, priced at the 2026-08-21 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 · 10b5-1 | 2026-08-20 | 2026-08-21 | $77.27 | $4.3M | -9.0% | -5.1% | — |
| ACMR | SELL | 2026-03-12 | 2026-03-13 | $45.58 | $4.5M | -5.6% | +2.6% | +89.9% |
| ACMR | SELL · 10b5-1 | 2025-12-04 | 2025-12-08 | $35.15 | $1.9M | +4.2% | +31.2% | +28.7% |
| ACMR | SELL · 10b5-1 | 2025-05-14 | 2025-05-16 | $25.22 | $378K | +0.6% | +11.2% | +11.5% |
| ACMR | SELL · 10b5-1 | 2025-03-12 | 2025-03-14 | $27.42 | $411K | -4.5% | -30.8% | -11.7% |
| ACMR | SELL · 10b5-1 | 2025-02-06 | 2025-02-10 | $22.00 | $330K | +13.5% | +19.8% | +7.3% |
| ACMR | SELL · 10b5-1 | 2024-10-04 | 2024-10-08 | $22.00 | $363K | -11.5% | -5.1% | -26.9% |
| ACMR | SELL · 10b5-1 | 2024-06-06 | 2024-06-07 | $22.92 | $917K | +4.6% | +7.0% | -24.9% |
| ACMR | SELL · 10b5-1 | 2024-01-12 | 2024-01-16 | $22.00 | $220K | -5.2% | -0.3% | +40.8% |
| ACMR | SELL · 10b5-1 | 2023-10-11 | 2023-10-13 | $20.00 | $225K | -4.0% | -9.1% | +8.1% |
| ACMR | SELL · 10b5-1 | 2023-09-01 | 2023-09-05 | $18.00 | $540K | -20.9% | -11.8% | -15.2% |
| ACMR | SELL | 2022-03-10 | 2022-03-11 | $64.23 | $388K | +23.1% | -2.8% | -15.9% |
| ACMR | SELL | 2021-11-18 | 2021-11-22 | $93.65 | $800K | -15.4% | -18.6% | -16.5% |
| ACMR | SELL | 2021-08-19 | 2021-08-20 | $82.00 | $760K | +6.0% | +17.0% | +14.0% |
| ACMR | SELL | 2021-03-12 | 2021-03-16 | $87.89 | $1.8M | -8.6% | -10.6% | +5.7% |
| ACMR | SELL | 2020-11-19 | 2020-11-20 | $74.45 | $558K | +7.3% | -0.8% | +57.5% |
| ACMR | SELL | 2020-08-27 | 2020-08-31 | $93.18 | $854K | -25.7% | -22.6% | -7.5% |
| ACMR | SELL | 2020-06-15 | 2020-06-17 | $54.34 | $589K | -5.2% | +29.1% | +16.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.