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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.

Key figures

Insider buysOpen market, last 90 days
0
Insider sellsLast 90 days, $15.3M in total
3
13F holdersQ2 2026, +81 vs. previous quarter
377
13F valueReported value at the end of Q2 2026
$6.11B
Superinvestors holdingAt the end of Q2 2026
3

Price chart

Superinvestors holding ACMR, Q2 2026

3 superinvestors report holding ACM Research, Inc. on Form 13F. Percentages are the stock's share of each portfolio.

Go to the superinvestors tab

Southeastern Asset Management (Longleaf)

Mason Hawkins

0.9%

ACM Research, Inc.'s share of the portfolio

Shares
139,478
Value
$17.7M

Soros Fund Management

George Soros

0.1%

ACM Research, Inc.'s share of the portfolio

Shares
30,122
Value
$3.82M
Other superinvestors holding ACMR (part 1)
SuperinvestorWeightValue
Maverick Capital<0.1%$674.4K

Latest insider trades

Open-market purchases and sales by ACM Research, Inc. insiders from Form 4, newest first.

See all insider trades
Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 10, 2026 (view filing)4:30 PM ETSep 8-92 daysWang David HSee RemarksSSaleClass A Common Stock−140.0K$75.93−$10.6M−14.9%802.7K after9 lots10b5-1
Aug 21, 2026 (view filing)9:30 PM ETAug 201 dayMcKechnie MarkSee RemarksSSaleClass A Common Stock−55.2K$77.27−$4.26M−98.4%900 after3 lots10b5-1
Aug 20, 2026 (view filing)4:30 PM ETAug 182 daysDun HaipingDirectorSSaleClass A Common Stock−5.00K$81.13−$405.7K−100.0%0 after3 lots10b5-1
Jun 5, 2026 (view filing)Jun 4-51 dayCheav SothearaSee remarksSSaleClass A Common Stock−18.8K$84.58−$1.59M−15.8%100.0K after7 lots10b5-1
Jun 5, 2026 (view filing)Jun 3-42 daysWang David HSee RemarksSSaleClass A Common Stock−100.0K$88.35−$8.84M−11.1%802.7K after11 lots10b5-1
May 21, 2026 (view filing)May 192 daysDun HaipingDirectorSSaleClass A Common Stock−5.00K$66.22−$331.1K−100.0%0 after4 lots10b5-1
Apr 21, 2026 (view filing)Apr 174 daysPappis Charles CDirectorSSaleClass A Common Stock−5.00K$52.00−$260.0K−100.0%0 after10b5-1
Mar 13, 2026 (view filing)Mar 121 dayMcKechnie MarkSee RemarksSSaleClass A Common Stock−98.6K$45.58−$4.49M−99.1%900 after6 lots10b5-1
Mar 13, 2026 (view filing)Mar 11-122 daysWang David HSee RemarksSSaleClass A Common Stock−110.0K$46.86−$5.15M−12.1%802.7K after5 lots10b5-1
Mar 12, 2026 (view filing)Mar 10-112 daysLiu TracyDirectorSSaleClass A Common Stock−60.0K$47.51−$2.85M−35.1%110.8K after4 lots10b5-1

Top 10 13F holders, Q2 2026

The largest institutional positions in ACM Research, Inc. at the end of Q2 2026; share changes are against Q1 2026.

See all 377 holders
Institutions holding ACMR in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
BlackRock, Inc.8,660,842$1.10B0.02%+675,995+8.5%Added
Vanguard Portfolio Management LLC3,349,436$425.0M0.02%+1,145,605+52.0%Added
Vanguard Capital Management LLC2,462,745$312.5M0.01%+198,408+8.8%Added
Capital World Investors2,398,036$304.3M0.04%+2,398,036New
State Street Corp2,188,254$277.7M0.01%+182,138+9.1%Added
Geode Capital Management, LLC1,487,797$188.8M0.01%+116,570+8.5%Added
Invesco Ltd.1,170,080$148.5M0.01%+382,979+48.7%Added
Value Aligned Research Advisors, LLC1,053,949$133.7M0.80%+98,022+10.3%Added
Ward Ferry Management (BVI) Ltd969,200$123.0M18.56%+969,200New
Dimensional Fund Advisors LP954,474$121.1M0.02%+235,451+32.7%Added