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ACM Research stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+44.3% to $44.61
ACM Research (ACMR) stock rose 44% over the last 252 sessions, to $44.61. On the way it reported 4 quarters, its insiders filed no open-market trades (10b5-1 plan sales aside) and 4 Form 144 notices of planned sales, and the company filed 2 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 5, 2026 | Earnings | Earnings: beat the EPS estimate by 6.3% | −12.2% (−7.7% vs SPY) | — | — |
| Nov 3, 2026 | 8-K | Directors and officers: departures, appointments, pay | −2.0% (−3.6% vs SPY) | — | — |
| Sep 9, 2026 | Form 144 | Form 144: Hui Wang plans to sell $5.2M | −4.1% (−3.6% vs SPY) | −18.5% (−17.4% vs SPY) | −5.5% (−7.2% vs SPY) |
| Sep 8, 2026 | Form 144 | Form 144: Hui Wang plans to sell $5.4M | +3.3% (+3.8% vs SPY) | −10.7% (−9.5% vs SPY) | +1.2% (−0.2% vs SPY) |
| Aug 20, 2026 | Form 144 | Form 144: Mark A McKechnie plans to sell $4.3M | +1.2% (+2.0% vs SPY) | +1.9% (+2.3% vs SPY) | −12.4% (−11.7% vs SPY) |
| Aug 18, 2026 | Form 144 | Form 144: Haiping Dun plans to sell $406K | −1.5% (−0.8% vs SPY) | −10.2% (−9.0% vs SPY) | −27.9% (−25.4% vs SPY) |
| Aug 7, 2026 | Earnings | Earnings: beat the EPS estimate by 81.2% | +5.9% (+5.3% vs SPY) | +2.8% (+1.5% vs SPY) | −5.9% (−6.1% vs SPY) |
| May 12, 2026 | 8-K | Material definitive agreement | −2.6% (−2.5% vs SPY) | −2.2% (−2.1% vs SPY) | +21.2% (+23.1% vs SPY) |
| May 7, 2026 | Earnings | Earnings: beat the EPS estimate by 72.9% | +6.7% (+7.0% vs SPY) | +15.6% (+14.5% vs SPY) | +32.0% (+31.5% vs SPY) |
| Feb 26, 2026 | Earnings | Earnings: missed the EPS estimate by -37.5% | −18.3% (−17.7% vs SPY) | −27.8% (−26.7% vs SPY) | −50.8% (−43.9% vs SPY) |
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → ACM Research: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.