Public ownership evidence

ACM Research, Inc. Class A Common Stock (ACMR) Ownership Disclosures

Read ACMR insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

ACM Research, Inc. Class A Common Stock: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-09-10
Trade date
2026-09-09
Reporting owners
Wang David H
Code
S
Shares
11,666
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001140361-26-036191
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read ACMR fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read ACMR fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-09-102026-09-09Wang David HS11,666Not reported
2026-09-102026-09-09Wang David HS18,934Not reported
2026-09-102026-09-09Wang David HS33,493Not reported
2026-09-102026-09-08Wang David HS1,500Not reported
2026-09-102026-09-08Wang David HS12,323Not reported
2026-09-102026-09-08Wang David HS51,374Not reported
2026-09-102026-09-08Wang David HS4,803Not reported
2026-09-102026-09-09Wang David HS1,100Not reported
2026-09-102026-09-09Wang David HS4,807Not reported
2026-08-272026-08-12Pappis Charles CA728Not reported
2026-08-272026-08-12Pappis Charles CA6,400Not reported
2026-08-272026-08-12Liu TracyA728Not reported
2026-08-272026-08-12Liu TracyA6,400Not reported
2026-08-272026-08-12Dun HaipingA728Not reported
2026-08-272026-08-12Dun HaipingA6,400Not reported
2026-08-222026-08-20McKechnie MarkS11,209Not reported
2026-08-222026-08-20McKechnie MarkS30,365Not reported
2026-08-222026-08-20McKechnie MarkS13,625Not reported
2026-08-212026-08-18Dun HaipingS400Not reported
2026-08-212026-08-18Dun HaipingS3,400Not reported
2026-08-212026-08-18Dun HaipingS1,200Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2969$8,755None
Cornerstone Financial Management LLC2026-03-312026-08-2969$2,715None
Cornerstone Financial Management LLC2025-12-312026-08-2969$2,722None
Advisors Asset Management, Inc.2025-03-312026-08-2796$2,241None
Advisors Asset Management, Inc.2025-09-302026-08-2780$3,130None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-264,900$621,761None
Advisors Asset Management, Inc.2025-06-302026-08-2593$2,409None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2559,702$7,575,587None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-257,575,587$59,702,000None
Advisors Asset Management, Inc.2024-09-302026-08-2254$1,096None
Advisors Asset Management, Inc.2024-12-312026-08-22102$1,540None
Advisors Asset Management, Inc.2025-12-312026-08-22548$21,619None
Bullock Wealth Management Group2026-06-302026-08-20279$32,688None
SPX Gestao de Recursos Ltda2026-06-302026-08-2013,815$1,752,985None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-205,349$678,735None
Ensign Peak Advisors, Inc2026-03-312026-08-194,564$179,593None
Ensign Peak Advisors, Inc2025-12-312026-08-194,564$180,050None
Ensign Peak Advisors, Inc2025-09-302026-08-1911,514$450,543None
Value Aligned Research Advisors, LLC2026-06-302026-08-18100$12,689Call
Value Aligned Research Advisors, LLC2026-06-302026-08-181,053,949$133,735,589None
Empowered Funds, LLC2026-06-302026-08-181,802$228,656None
Odyssean, LLC2026-06-302026-08-1519,180$2,433,750None
DARK FOREST CAPITAL MANAGEMENT LP2026-06-302026-08-153,657$464,037None
Kultura Capital Management LP2026-06-302026-08-1537,725$4,786,925None
Graham Capital Management, L.P.2026-06-302026-08-154,500$571,005None
SEI INVESTMENTS CO2026-06-302026-08-1521,485$2,726,232None
SEI INVESTMENTS CO2026-06-302026-08-1518,828$2,389,090None
Massar Capital Management, LP2026-06-302026-08-154,952$628,359None
Advisors Asset Management, Inc.2026-06-302026-08-152,628$333,467None
SHELTON CAPITAL MANAGEMENT2026-06-302026-08-151,651$209,495None
Marex Group Ltd2026-06-302026-08-156,294$798,646None
Marex Group Ltd2026-06-302026-08-154,930$625,568None
Nemes Rush Group LLC2026-06-302026-08-151,500$190,335None
Quarry LP2026-06-302026-08-1511$1,396None
MY.Alpha Management HK Advisors Ltd2026-06-302026-08-15249,500$31,659,055None
Cederberg Capital Ltd2026-06-302026-08-15254,669$32,315,000None
Militia Capital Partners, LP2025-03-312026-08-1521,689$506,221None
XTX Topco Ltd2026-06-302026-08-1512,528$1,589,678None
Aquatic Capital Management LLC2026-06-302026-08-1516,800$2,131,752None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15526,760$66,840,576None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15526,760$66,840,576None
Qube Research & Technologies Ltd2026-06-302026-08-15280,015$35,531,103None
Diametric Capital, LP2026-06-302026-08-1516,808$2,132,767None
OSAIC HOLDINGS, INC.2026-06-302026-08-1528$3,553None
OSAIC HOLDINGS, INC.2026-06-302026-08-153,308$419,752None
OSAIC HOLDINGS, INC.2026-06-302026-08-1525,907$3,287,132None
Squarepoint Ops LLC2026-06-302026-08-156,100$774,029Call
Squarepoint Ops LLC2026-06-302026-08-153,300$418,737Put
Steamboat Capital Partners, LLC2026-06-302026-08-15182,773$23,192,066None
MetLife Investment Management, LLC2026-06-302026-08-1531,382$3,982,062None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗Advisors Asset Management, Inc. ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Advisors Asset Management, Inc. ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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