Company · Ownership research

ACM Research, Inc. ACMR

CIK 0001680062

Form 4 transactions dated Nov 1, 2023 to Nov 8, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 36 rows; the complete set is available through the API.

Insider filings on file run through Sep 10, 2026.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $0.00
Sold: $146.61M

Nov 1, 2023 – Sep 10, 2026
Available records · partial months are marked ·

202410 of 30 preview events · 36 available in 2024

Date	Insider	Activity	Trade value (USD)	% of prior holding
Nov 29, 2024	Dun Haiping Director	Sale10b5-1 footnote	$332.18K 19,058 shares sold	2.46% sold Direct holding	▾
Nov 29, 2024	Wang David H See Remarks · Director · 10% owner	Sale10b5-1 footnote	$981.00K 56,250 shares sold	8.60% sold Direct holding	▾
Nov 26, 2024	Wang David H See Remarks · Director · 10% owner	Sale10b5-1 footnote	$1.01M 56,250 shares sold	7.92% sold Direct holding	▾
Nov 22, 2024	Dun Haiping Director	Sale10b5-1 footnote	$286.80K 15,000 shares sold	1.90% sold Direct holding	▾
Nov 22, 2024	Wang David H See Remarks · Director · 10% owner	Sale10b5-1 footnote	$1.07M 56,250 shares sold	7.34% sold Direct holding	▾
Oct 8, 2024	Shanghai Pudong Science & Technology Investment Group Co., Ltd. · Shanghai Science & Technology Venture Capital (Group) Co., Ltd. 10% owner · Possible member of 10% group	Sale	$1.91M 90,396 shares sold	Unavailable Direct holding	▾
Oct 8, 2024	Xing Xiao Director	Sale10b5-1 footnote	$1.91M 90,396 shares sold	3.72% sold Indirect holding	▾
Oct 7, 2024	Shanghai Pudong Science & Technology Investment Group Co., Ltd. · Shanghai Science & Technology Venture Capital (Group) Co., Ltd. 10% owner · Possible member of 10% group	Sale	$6.62M 275,000 shares sold	Unavailable Direct holding	▾
Oct 7, 2024	Xing Xiao Director	Sale10b5-1 footnote	$6.62M 275,000 shares sold	10.17% sold Indirect holding	▾
Oct 4, 2024	Shanghai Pudong Science & Technology Investment Group Co., Ltd. · Shanghai Science & Technology Venture Capital (Group) Co., Ltd. 10% owner · Possible member of 10% group	Sale	$14.99M 700,000 shares sold	Unavailable Direct holding	▾

Showing 30 / 36 record groups in 2024. The complete set is available through the API.

ACM Research, Inc. · ACMR

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 36 purchase / sale groups and 30 of 46 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"ACMR","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.