$ACMR insider trading
Over the last 12 months, ACM Research insiders reported no purchases and 35 sales totaling $52.7M across SEC Form 4 filings. 100% of those filings were made under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $52.7M 35 events
- Events · 12m
- 35 Form 4 filings, grouped
- Insiders · 12m
- 9 distinct reporters
- 10b5-1 share
- 100% of events, not dollars
All insider trades
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 140,000 | $75.93 | $10.6M | -14.9% | plan · 9 tranches |
| Aug 20, 2026 | McKechnie MarkSee Remarks · O | ▼ Sale | 55,199 | $77.27 | $4.3M | -98.4% | plan · 3 tranches |
| Aug 18, 2026 | Dun HaipingD | ▼ Sale | 5,000 | $81.13 | $406K | -100% | plan · 3 tranches |
| Jun 5, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 1,647 | $85.41 | $141K | -1.6% | plan |
| Jun 5, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 400 | $84.01 | $34K | -0.4% | plan |
| Jun 5, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 968 | $82.61 | $80K | -0.9% | plan |
| Jun 5, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 2,384 | $81.73 | $195K | -2.3% | plan |
| Jun 4, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 2,839 | $85.77 | $244K | -2.8% | plan |
| Jun 4, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 9,212 | $85.11 | $784K | -8.2% | plan |
| Jun 4, 2026 | Cheav SothearaSee remarks · O | ▼ Sale | 1,300 | $84.08 | $109K | -1.1% | plan |
| Jun 4, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 826 | $87.91 | $73K | -0.1% | plan |
| Jun 4, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 8,581 | $87.13 | $748K | -1.1% | plan |
| Jun 4, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 10,992 | $86.07 | $946K | -1.3% | plan |
| Jun 4, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 17,543 | $85.11 | $1.5M | -2.1% | plan |
| Jun 4, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 2,060 | $83.86 | $173K | -0.2% | plan |
| Jun 3, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 1,187 | $93.04 | $110K | -0.1% | plan |
| Jun 3, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 5,843 | $92.38 | $540K | -0.7% | plan |
| Jun 3, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 9,925 | $90.78 | $901K | -1.2% | plan |
| Jun 3, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 32,450 | $89.84 | $2.9M | -3.8% | plan |
| Jun 3, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 6,295 | $88.98 | $560K | -0.7% | plan |
| Jun 3, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 4,300 | $87.57 | $377K | -0.5% | plan |
| Apr 17, 2026 | Pappis Charles CD | ▼ Sale | 5,000 | $52 | $260K | -100% | plan |
| Mar 12, 2026 | McKechnie MarkSee Remarks · O | ▼ Sale | 98,551 | $45.58 | $4.5M | -99.1% | plan · 6 tranches |
| Mar 12, 2026 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 110,000 | $46.86 | $5.2M | -12.1% | plan · 5 tranches |
| Mar 11, 2026 | Liu TracyD | ▼ Sale | 60,000 | $47.51 | $2.9M | -35.1% | plan · 4 tranches |
| Mar 9, 2026 | Dun HaipingD | ▼ Sale | 5,000 | $43.47 | $217K | -100% | plan · 2 tranches |
| Mar 6, 2026 | Feng LisaSee remarks · O | ▼ Sale | 30,000 | $48.04 | $1.4M | -37.5% | plan · 4 tranches |
| Mar 5, 2026 | Pappis Charles CD | ▼ Sale | 5,000 | $50.09 | $250K | -100% | plan |
| Dec 8, 2025 | McKechnie MarkSee Remarks · O | ▼ Sale | 31,250 | $34.93 | $1.1M | -97.2% | plan · 3 tranches |
| Dec 4, 2025 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 130,000 | $33.55 | $4.4M | -13.9% | plan · 4 tranches |
| Dec 3, 2025 | Chen FupingSee remarks · O | ▼ Sale | 120,000 | $33.18 | $4.0M | -100% | plan · 3 tranches |
| Nov 13, 2025 | Feng LisaSee remarks · O | ▼ Sale | 30,000 | $33.26 | $998K | -37.5% | plan · 2 tranches |
| Sep 18, 2025 | Cheav SothearaSee remarks · O | ▼ Sale | 10,000 | $35 | $350K | -9.1% | plan |
| Sep 18, 2025 | Wang JianSee remarks · O | ▼ Sale | 30,000 | $35 | $1.1M | -10.6% | plan |
| Sep 17, 2025 | Liu TracyD | ▼ Sale | 15,000 | $33 | $495K | -11.9% | plan |
| Sep 4, 2025 | Wang David HSee Remarks · O·D·10% | ▼ Sale | 130,000 | $26.61 | $3.5M | -16.2% | plan · 3 tranches |
| Aug 25, 2025 | Wang JianSee remarks · O | ▼ Sale | 60,000 | $31 | $1.9M | -19.2% | plan · 2 tranches |
| Aug 22, 2025 | Cheav SothearaSee remarks · O | ▼ Sale | 11,152 | $30 | $335K | -10% | plan |
Every $ACMR filing on this page is one API call away
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? ACM Research filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $ACMR feed.