ACMR Institutional Ownership & Shareholders
ACM RESEARCH INC-CLASS A (ACMR) is currently held by 371 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $5.83B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ACMR tracked by InsiderSet, reporting ownership valued at approximately $1.10B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $393.81M, representing an estimated loss of -64.17% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 54% of the total disclosed ACMR value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ACM RESEARCH INC-CLASS A (ACMR).
This page ranks the largest institutional ACMR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
371
Total Reported Value
$5.83B
Largest Holder
Blackrock, Inc.
Largest Position
$1.10B
Insider Transactions (90d)
20
Latest Filing Quarter
Q2 2026
New Institutional Positions
102
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 8,660,842 | $1,098,974,240 | $393,808,486 | -$705,165,754 | -64.17% | |
| Vanguard Portfolio Management Llc | 0.02% | 3,349,436 | $425,009,934 | $152,298,855 | -$272,711,079 | -64.17% | |
| Vanguard Capital Management Llc | 0.01% | 2,462,745 | $312,497,713 | $111,981,015 | -$200,516,698 | -64.17% | |
| Capital World Investors | 0.04% | 2,398,036 | $304,286,788 | $109,038,697 | -$195,248,091 | -64.17% | |
| State Street Corp | 0.01% | 2,188,254 | $277,667,550 | $99,499,909 | -$178,167,641 | -64.17% | |
| Geode Capital Management, Llc | 0.01% | 1,487,797 | $188,823,702 | $67,650,130 | -$121,173,572 | -64.17% | |
| Invesco Ltd. | 0.01% | 1,170,080 | $148,471,451 | $53,203,538 | -$95,267,913 | -64.17% | |
| Value Aligned Research Advisors, Llc | 0.80% | 1,053,949 | $133,735,589 | $47,923,061 | -$85,812,528 | -64.17% | |
| Wfm Asia (Bvi) Ltd | 18.56% | 969,200 | $122,982,000 | $44,069,524 | -$78,912,476 | -64.17% | |
| Dimensional Fund Advisors Lp | 0.02% | 954,474 | $121,073,364 | $43,399,933 | -$77,673,431 | -64.15% | |
| Wcm Investment Management, Llc | 0.20% | 917,651 | $109,090,351 | $41,725,591 | -$67,364,760 | -61.75% | |
| Tekne Capital Management, Llc | 30.62% | 737,500 | $93,580,000 | $33,534,125 | -$60,045,875 | -64.17% | |
| Morgan Stanley | 0.00% | 700,185 | $88,846,553 | $31,837,412 | -$57,009,141 | -64.17% | |
| Fmr Llc | 0.00% | 672,184 | $85,293,428 | $30,564,206 | -$54,729,222 | -64.17% | |
| Fuller & Thaler Asset Management, Inc. | 0.22% | 639,448 | $81,139,542 | $29,075,701 | -$52,063,841 | -64.17% | |
| Gilder Gagnon Howe & Co Llc | 0.83% | 637,058 | $80,836,290 | $28,967,027 | -$51,869,263 | -64.17% | |
| Citadel Advisors Llc | 0.05% | 636,836 | $80,808,120 | $28,956,933 | -$51,851,187 | -64.17% | |
| Capital International Investors | 0.02% | 623,429 | $79,106,906 | $28,347,317 | -$50,759,589 | -64.17% | |
| Price T Rowe Associates Inc | 0.01% | 591,573 | $75,066,000 | $26,898,824 | -$48,167,176 | -64.17% | |
| Northern Trust Corp | 0.01% | 569,126 | $72,216,397 | $25,878,159 | -$46,338,238 | -64.17% | |
| Charles Schwab Investment Management Inc | 0.01% | 526,760 | $66,840,576 | $23,951,777 | -$42,888,799 | -64.17% | |
| Bank Of America Corp | 0.00% | 479,706 | $60,869,894 | $21,812,232 | -$39,057,662 | -64.17% | |
| Tidal Investments Llc | 0.14% | 470,937 | $59,757,196 | $21,413,505 | -$38,343,691 | -64.17% | |
| Goldman Sachs Group Inc | 0.01% | 426,243 | $54,085,973 | $19,381,269 | -$34,704,704 | -64.17% | |
| Vanguard Fiduciary Trust Co | 0.01% | 404,100 | $51,276,249 | $18,374,427 | -$32,901,822 | -64.17% | |
| Ubs Group Ag | 0.01% | 402,473 | $51,069,799 | $18,300,447 | -$32,769,352 | -64.17% | |
| Wexford Capital Lp | 6.19% | 355,400 | $45,096,706 | $16,160,038 | -$28,936,668 | -64.17% | |
| Janus Henderson Group Plc | 0.02% | 1,085,634 | $42,697,985 | $49,363,778 | +$6,665,793 | +15.61% | |
| Bank Of New York Mellon Corp | 0.01% | 326,284 | $41,402,116 | $14,836,133 | -$26,565,983 | -64.17% | |
| Aqr Capital Management Llc | 0.01% | 314,172 | $39,865,285 | $14,285,401 | -$25,579,884 | -64.17% | |
| First Trust Advisors Lp | 0.02% | 306,034 | $38,832,654 | $13,915,366 | -$24,917,288 | -64.17% | |
| Penn Capital Management Company, Llc | 2.30% | 285,790 | $36,331,890 | $12,994,871 | -$23,337,019 | -64.23% | |
| Qube Research & Technologies Ltd | 0.04% | 280,015 | $35,531,103 | $12,732,282 | -$22,798,821 | -64.17% | |
| Oasis Management Co Ltd. | 3.76% | 274,525 | $34,834,477 | $12,482,652 | -$22,351,825 | -64.17% | |
| Cederberg Capital Ltd | 32.20% | 254,669 | $32,315,000 | $11,579,799 | -$20,735,201 | -64.17% | |
| Susquehanna International Group, Llp | 0.03% | 253,671 | $32,188,313 | $11,534,420 | -$20,653,893 | -64.17% | |
| My.Alpha Management Hk Advisors Ltd | 12.19% | 249,500 | $31,659,055 | $11,344,765 | -$20,314,290 | -64.17% | |
| Principal Financial Group Inc | 0.02% | 380,310 | $30,774,684 | $17,292,696 | -$13,481,988 | -43.81% | |
| Renaissance Technologies LLC | Jim Simons | 0.04% | 229,800 | $29,159,322 | $10,449,006 | -$18,710,316 | -64.17% |
| 12 West Capital Management Lp | 5.34% | 225,000 | $28,550,250 | $10,230,750 | -$18,319,500 | -64.17% | |
| Russell Investments Group, Ltd. | 0.02% | 221,775 | $28,141,120 | $10,084,109 | -$18,057,011 | -64.17% | |
| Two Sigma Investments, Lp | 0.02% | 212,544 | $26,969,708 | $9,664,376 | -$17,305,332 | -64.17% | |
| Citigroup Inc | 0.01% | 209,845 | $26,627,232 | $9,541,652 | -$17,085,580 | -64.17% | |
| Jpmorgan Chase & Co | 0.00% | 214,853 | $25,828,700 | $9,769,366 | -$16,059,334 | -62.18% | |
| Public Sector Pension Investment Board | 0.07% | 196,012 | $24,871,963 | $8,912,666 | -$15,959,297 | -64.17% | |
| Jacobs Levy Equity Management, Inc | 0.09% | 191,966 | $24,358,566 | $8,728,694 | -$15,629,872 | -64.17% | |
| New York State Common Retirement Fund | 0.03% | 191,535 | $24,303,876 | $8,709,096 | -$15,594,780 | -64.17% | |
| Steamboat Capital Partners, Llc | 4.96% | 182,773 | $23,192,066 | $8,310,688 | -$14,881,378 | -64.17% | |
| Portolan Capital Management, Llc | 0.84% | 177,432 | $22,514,346 | $8,067,833 | -$14,446,513 | -64.17% | |
| Congress Asset Management Co | 0.15% | 277,150 | $22,426,978 | $12,602,011 | -$9,824,968 | -43.81% |
Frequently asked questions about ACMR
Who are the largest institutional holders of ACMR?
The largest institutional holders of ACMR reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, Capital World Investors, and State Street Corp. InsiderSet ranks institutional holders by their latest reported ACMR position.
What is ACMR institutional ownership?
This page tracks ACMR positions reported by institutional investment managers through SEC Form 13F. ACM RESEARCH INC-CLASS A (ACMR) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ACMR?
InsiderSet currently tracks 371 institutional managers reporting ACMR holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ACMR shareholders.
How much ACMR stock do institutions own?
Institutional investment managers disclosed approximately $5.83B in ACMR holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ACMR institutional ownership last updated?
The latest ACMR institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ACMR holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ACMR position after the reporting date.
Are institutions buying or selling ACMR?
Institutional buying and selling can be analyzed by comparing ACMR positions across consecutive 13F reporting periods. InsiderSet's ACMR Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ACMR ownership changes.
How has ACMR institutional ownership changed over time?
InsiderSet tracks ACMR institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.