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ACM Research, Inc.

ACMR
Exchange
Nasdaq
Industry
Special Industry Machinery, NEC
SEC CIK
0001680062

In the last 90 days, ACM Research, Inc. insiders filed 0 open-market purchases and 3 sales; 377 institutions reported holding it in 13F filings for Q2 2026, worth $6.11B in total; 3 superinvestors hold it, including Southeastern Asset Management (Longleaf) and Soros Fund Management.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by ACM Research, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
3 filings
3 insiders, $15.3M in total
Insiders trading
3
Net value
−$15.3M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for ACM Research, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for ACM Research, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Wang David HSee Remarks802,708Sep 10, 20268
Pappis Charles CDirector0Aug 26, 20263
Liu TracyDirector110,772Aug 26, 20262
Dun HaipingDirector0Aug 26, 20265
McKechnie MarkSee Remarks900Aug 21, 20263
Cheav SothearaSee remarks100,002Jun 5, 20261
Feng LisaSee remarks50,001Mar 9, 20262
Chen FupingSee remarks0Dec 4, 20251
Wang JianSee remarks253,158Sep 19, 20250
Hu ChenmingDirector100,002Mar 19, 20250
Shanghai Pudong Science & Technology Investment Group Co., Ltd.10% Owner, Other: Possible member of 10% group2,338,510Oct 8, 20240
Shanghai Science & Technology Venture Capital (Group) Co., Ltd.10% Owner, Other: Possible member of 10% group2,338,510Oct 8, 20240
Xing XiaoDirector2,338,510IndirectOct 8, 20240
Xiang YinanDirector1,146,170IndirectAug 24, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 13, 2021 (view filing)Aug 11-132 daysXiang YinanDirectorSSaleClass A Common Stock−53.6K$85.75−$4.60M−3.6%1.45M after6 lots
Aug 20, 2021 (view filing)Aug 191 dayMcKechnie MarkSee remarksSSaleClass A Common Stock−5.00K$82.08−$410.4K−100.0%0 after3 lots
Aug 20, 2021 (view filing)Aug 182 daysXiang YinanDirectorSSaleClass A Common Stock−26.6K$85.13−$2.27M−1.8%1.43M after2 lots
Aug 24, 2021 (view filing)Aug 23-241 dayXiang YinanDirectorSSaleClass A Common Stock−279.8K$87.52−$24.5M−19.6%1.15M after4 lots
Nov 22, 2021 (view filing)Nov 184 daysMcKechnie MarkSee RemarksSSaleClass A Common Stock−5.00K$94.05−$470.3K−100.0%0 after7 lots
Mar 11, 2022 (view filing)Mar 101 dayMcKechnie MarkSee RemarksSSaleClass A Common Stock−5.00K$64.20−$321.0K−94.3%300 after8 lots
Mar 11, 2022 (view filing)Mar 92 daysDun HaipingDirectorSSaleClass A Common Stock−12.3K$82.09−$1.01M−4.0%297.3K after3 lots
May 31, 2022 (view filing)May 274 daysDun HaipingDirectorSSaleClass A Common Stock−36.1K$15.00−$542.3K−4.1%855.1K after
Aug 17, 2022 (view filing)Aug 152 daysDun HaipingDirectorSSaleClass A Common Stock+36.5K$19.28+$704.1K+4.3%891.6K after
Aug 18, 2022 (view filing)Aug 16-172 daysCheav SothearaSee remarksSSaleClass A Common Stock−20.0K$18.21−$364.2K−14.3%120.0K after3 lots
Aug 22, 2022 (view filing)Aug 184 daysCheav SothearaSee remarksSSaleClass A Common Stock−10.0K$17.50−$175.0K−8.3%110.0K after
Aug 24, 2022 (view filing)Aug 222 daysDun HaipingDirectorSSaleClass A Common Stock−36.5K$16.10−$588.2K−4.1%855.1K after
Dec 2, 2022 (view filing)Nov 302 daysDun HaipingDirectorSSaleClass A Common Stock−35.3K$8.43−$297.8K−3.8%890.6K after
Mar 13, 2023 (view filing)Mar 94 daysFeng LisaSee remarksSSaleClass A Common Stock−22.5K$12.37−$278.4K−31.0%50.0K after4 lots
Mar 20, 2023 (view filing)Mar 164 daysDun HaipingDirectorSSaleClass A Common Stock−37.5K$12.06−$452.3K−4.0%889.1K after
Jun 5, 2023 (view filing)Jun 14 daysDun HaipingDirectorSSaleClass A Common Stock−37.5K$10.00−$375.0K−4.1%887.2K after
Jun 8, 2023 (view filing)Jun 62 daysCheav SothearaSee remarksSSaleClass A Common Stock−39.0K$10.00−$390.0K−26.2%110.0K after
Jul 5, 2023 (view filing)Jul 32 daysFeng LisaSee remarksSSaleClass A Common Stock−22.5K$15.00−$337.5K−31.0%50.0K after
Aug 24, 2023 (view filing)Aug 222 daysDun HaipingDirectorSSaleClass A Common Stock−32.1K$13.85−$444.6K−3.6%855.1K after
Aug 25, 2023 (view filing)Aug 232 daysChen FupingSee remarksSSaleClass A Common Stock−105.0K$15.00−$1.57M−100.0%0 after
Sep 5, 2023 (view filing)Sep 14 daysMcKechnie MarkSee RemarksSSaleClass A Common Stock−30.0K$18.00−$540.0K−97.1%900 after10b5-1
Sep 14, 2023 (view filing)Sep 12-132 daysWang David HSee RemarksSSaleClass A Common Stock−175.1K$17.87−$3.13M−25.8%504.0K after3 lots10b5-1
Oct 13, 2023 (view filing)Oct 112 daysMcKechnie MarkSee RemarksSSaleClass A Common Stock−11.3K$20.00−$225.0K−92.6%900 after10b5-1
Nov 15, 2023 (view filing)Nov 132 daysCheav SothearaSee remarksSSaleClass A Common Stock−26.0K$16.79−$436.5K−19.1%110.0K after10b5-1
Nov 22, 2023 (view filing)Nov 202 daysLiu TracyDirectorSSaleClass A Common Stock−15.0K$17.91−$268.6K−28.9%36.9K after10b5-1
Nov 27, 2023 (view filing)Nov 225 daysDun HaipingDirectorSSaleClass A Common Stock−15.0K$17.66−$264.9K−1.7%874.1K after10b5-1
Nov 27, 2023 (view filing)Nov 225 daysWang David HSee RemarksSSaleClass A Common Stock−90.0K$17.68−$1.59M−13.3%588.8K after2 lots10b5-1
Dec 1, 2023 (view filing)Nov 292 daysWang David HSee RemarksSSaleClass A Common Stock−84.8K$17.14−$1.45M−14.4%504.0K after2 lots10b5-1
Dec 1, 2023 (view filing)Nov 292 daysDun HaipingDirectorSSaleClass A Common Stock−19.0K$17.25−$327.5K−2.2%855.1K after10b5-1
Dec 28, 2023 (view filing)Dec 262 daysFeng LisaSee remarksSSaleClass A Common Stock−7.50K$20.00−$150.0K−13.0%50.0K after10b5-1
Dec 28, 2023 (view filing)Dec 262 daysLiu TracyDirectorSSaleClass A Common Stock−10.0K$20.00−$200.0K−8.3%110.8K after10b5-1
Jan 16, 2024 (view filing)Jan 124 daysMcKechnie MarkSee RemarksSSaleClass A Common Stock−10.0K$22.00−$220.0K−91.7%900 after10b5-1
Mar 1, 2024 (view filing)Feb 282 daysLiu TracyDirectorSSaleClass A Common Stock−12.5K$25.20−$315.0K−10.1%110.8K after10b5-1
Mar 1, 2024 (view filing)Feb 282 daysFeng LisaSee remarksSSaleClass A Common Stock−7.50K$25.20−$189.0K−13.0%50.0K after10b5-1
Mar 12, 2024 (view filing)Mar 84 daysWang David HSee RemarksSSaleClass A Common Stock−90.0K$30.36−$2.73M−13.2%591.1K after2 lots10b5-1
Mar 12, 2024 (view filing)Mar 84 daysDun HaipingDirectorSSaleClass A Common Stock−15.0K$30.36−$455.4K−1.7%874.5K after10b5-1
Mar 15, 2024 (view filing)Mar 13-142 daysCheav SothearaSee remarksSSaleClass A Common Stock−10.0K$28.49−$284.9K−9.1%100.0K after3 lots10b5-1
Mar 15, 2024 (view filing)Mar 141 dayDun HaipingDirectorSSaleClass A Common Stock−19.4K$27.70−$538.4K−2.2%855.1K after2 lots10b5-1
Mar 15, 2024 (view filing)Mar 141 dayWang David HSee RemarksSSaleClass A Common Stock−87.1K$27.62−$2.41M−14.7%504.0K after2 lots10b5-1
May 24, 2024 (view filing)May 222 daysWang David HSee RemarksSSaleClass A Common Stock−90.0K$22.81−$2.05M−13.2%590.1K after2 lots10b5-1
May 24, 2024 (view filing)May 222 daysDun HaipingDirectorSSaleClass A Common Stock−15.0K$22.88−$343.2K−1.7%874.3K after10b5-1
May 31, 2024 (view filing)May 292 daysWang David HSee RemarksSSaleClass A Common Stock−86.1K$22.62−$1.95M−14.6%504.0K after2 lots10b5-1
May 31, 2024 (view filing)May 292 daysDun HaipingDirectorSSaleClass A Common Stock−19.2K$22.63−$435.4K−2.2%855.1K after10b5-1
Jun 7, 2024 (view filing)Jun 61 dayMcKechnie MarkSee RemarksSSaleClass A Common Stock−20.0K$22.92−$458.4K−95.7%900 after2 lots10b5-1
Jun 7, 2024 (view filing)Jun 6-71 dayWang JianSee remarksSSaleClass A Common Stock−60.0K$22.50−$1.35M−19.2%253.2K after2 lots10b5-1
Jun 12, 2024 (view filing)Jun 10-112 daysWang JianSee remarksSSaleClass A Common Stock−60.0K$22.54−$1.35M−19.2%253.2K after3 lots10b5-1
Aug 26, 2024 (view filing)Aug 224 daysDun HaipingDirectorSSaleClass A Common Stock−15.0K$19.85−$297.8K−1.9%774.2K after10b5-1
Sep 3, 2024 (view filing)Aug 295 daysDun HaipingDirectorSSaleClass A Common Stock−19.1K$18.08−$345.3K−2.5%755.1K after10b5-1
Oct 3, 2024 (view filing)Oct 1-22 daysXing XiaoDirectorSSaleClass A Common Stock−34.6K$20.05−$693.9K−1.0%3.40M after2 lots10b5-1
Oct 3, 2024 (view filing)9:58 PM ETOct 1-22 daysShanghai Pudong Science & Technology Investment Group Co., Ltd. and 1 other10% Owner, Other: Possible member of 10% groupSSaleClass A Common Stock, $0.0001 par value−34.6K$20.05−$693.9K−1.0%3.40M after2 lots10b5-1Duplicate filing