Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ACMR held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 8.7M | $1.10B | +8.5% | 13.508% | 0.02% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.3M | $425.0M | +52.0% | 5.224% | 0.02% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 2.5M | $312.5M | +8.8% | 3.841% | 0.01% |
| 4 | Capital World Investors | 2.4M | $304.3M | — | 3.740% | 0.04% |
| 5 | STATE STREET CORP | 2.2M | $277.7M | +9.1% | 3.413% | 0.00% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 1.5M | $188.8M | +8.5% | 2.320% | 0.01% |
| 7 | JANE STREET GROUP, LLC | 1.4M | $183.8M | +249.3% | 2.259% | 0.02% |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.2M | $151.9M | +29.3% | 1.867% | 0.01% |
| 9 | Invesco Ltd. | 1.2M | $148.5M | +48.7% | 1.825% | 0.01% |
| 10 | CITADEL ADVISORS LLC | 1.1M | $136.4M | +93.3% | 1.676% | 0.01% |
| 11 | Value Aligned Research Advisors, LLC | 1.1M | $133.7M | +10.3% | 1.644% | 0.33% |
| 12 | DIMENSIONAL FUND ADVISORS LP | 954K | $121.1M | +32.8% | 1.489% | 0.02% |
| 13 | WCM INVESTMENT MANAGEMENT, LLC | 918K | $109.1M | -50.7% | 1.431% | 0.20% |
| 14 | Tekne Capital Management, LLC | 738K | $93.6M | +3.1% | 1.150% | 30.62% |
| 15 | MORGAN STANLEY | 700K | $88.8M | -41.3% | 1.092% | 0.00% |
| 16 | FMR LLC | 672K | $85.3M | +6.8% | 1.048% | 0.00% |
| 17 | FULLER & THALER ASSET MANAGEMENT, INC. | 639K | $81.1M | — | 0.997% | 0.22% |
| 18 | GILDER GAGNON HOWE & CO LLC | 637K | $80.8M | +794.2% | 0.994% | 0.83% |
| 19 | Capital International Investors | 623K | $79.1M | — | 0.972% | 0.02% |
| 20 | NORTHERN TRUST CORP | 569K | $72.2M | +1.2% | 0.888% | 0.01% |
| 21 | Jupiter Topco LLC | 554K | $70.2M | — | 0.864% | 0.03% |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 527K | $66.8M | +9.5% | 0.822% | 0.01% |
| 23 | BANK OF AMERICA CORP /DE/ | 480K | $60.9M | +19.2% | 0.748% | 0.00% |
| 24 | UBS Group AG | 451K | $57.2M | +11.7% | 0.704% | 0.01% |
| 25 | Point72 Asset Management, L.P. | 429K | $54.4M | +40.5% | 0.668% | 0.06% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ACMR — a direct measure of their conviction.
Filings activity in ACMR during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 385 | +24% | 80.55% | +6.72 pp | $6.15B | +251% |
| Q1 2026 | 310 | +10% | 73.83% | 2.73 pp | $1.75B | 2.0% |
| Q4 2025 | 281 | +8.9% | 76.56% | +3.52 pp | $1.79B | +5.3% |
| Q3 2025 | 258 | +8.4% | 73.04% | +10.38 pp | $1.70B | +69% |
| Q2 2025 | 238 | +2.1% | 62.66% | +6.38 pp | $1.00B | +16% |
| Q1 2025 | 233 | +32% | 56.28% | 0.64 pp | $862M | +63% |
| Q4 2024 | 177 | +0.6% | 56.92% | +6.34 pp | $529M | 18% |
| Q3 2024 | 176 | — | 50.58% | — | $644M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ACMR stock.
Based on Q2 2026 13F filings, institutional ownership of ACM Research, Inc. stands at 80.5%, held across 385 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ACMR, with approximately 8,660,842 shares worth $1.10B as of Q2 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of ACMR, including JANE STREET GROUP, LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC, Point72 Asset Management, L.P..
Our composite Smart Money Score for ACMR is 82 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
115 institutions opened new positions in ACMR during Q2 2026, while 39 fully exited. 247 added to existing positions and 15 trimmed.
ACMR institutional ownership rose by 6.72 percentage points quarter-over-quarter, with a net change of +75 holders.
The top 10 institutions account for 52.5% of all reported 13F value in ACMR, and the top 25 account for 72.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
ACM Research, Inc. (ACMR) Institutional Ownership