ACM Research, Inc. 13F holders
Of the 44 funds followed here, 11 reported a position in ACM Research, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 1.5 million shares worth $188.8 million, 0.0% of its reported book. New this quarter: Soros Fund Management.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 1,487,797 | $188.8 million | 0.0% | +116,570 | added | 30 June 2026 | 13F |
| Citadel Advisors | 1,074,736 | $136.4 million | 0.0% | +518,758 | added | 30 June 2026 | 13F |
| FMR LLC | 672,184 | $85.3 million | 0.0% | +42,940 | added | 30 June 2026 | 13F |
| Point72 Asset Management | 428,500 | $54.4 million | 0.1% | +123,500 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 229,800 | $29.2 million | 0.0% | +107,200 | added | 30 June 2026 | 13F |
| Two Sigma Investments | 226,444 | $28.7 million | 0.0% | +168,128 | added | 30 June 2026 | 13F |
| Millennium Management | 170,801 | $21.7 million | 0.0% | +105,241 | added | 30 June 2026 | 13F |
| Southeastern Asset Management | 139,478 | $17.7 million | 0.9% | -643,422 | trimmed | 30 June 2026 | 13F |
| Dodge & Cox | 116,392 | $14.8 million | 0.0% | -3,500 | trimmed | 30 June 2026 | 13F |
| Soros Fund Management | 30,122 | $3.8 million | 0.0% | +30,122 | new | 30 June 2026 | 13F |
| Norges Bank | 28,528 | $3.6 million | 0.0% | held | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 31 July 2026 | 13G | Vanguard Portfolio Management and 1 other | 3.4 million | 5.3% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 30 January 2026 | 13G/A | The Vanguard Group and 1 other | 5.0 million | 8.3% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.Fails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 9 September 2026 | 29,486 | $76.91 | SEC |
| 8 September 2026 | 4,696 | $74.44 | SEC |
| 4 September 2026 | 160 | $69.42 | SEC |
| 28 August 2026 | 58 | $80.49 | SEC |
| 25 August 2026 | 199 | $77.35 | SEC |
| 21 August 2026 | 10,702 | $78.52 | SEC |
| 10 August 2026 | 1,103 | $83.80 | SEC |
| 5 August 2026 | 15 | $82.51 | SEC |
| 3 August 2026 | 18,158 | $78.47 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
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Largest in the window: 29,486 on 9 September 2026. A fail is an operational fact about settlement, not a position.Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to ACMR by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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