ACM RESEARCH INC-CLASS A (ACMR) Institutional Shareholders
ACM RESEARCH INC-CLASS A (ACMR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $5.60B in ACMR holdings during the latest filing period.
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 $696.50M, representing an estimated loss of -36.62% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 55% 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
373
Total Reported Value
$5.60B
Largest Holder
Blackrock, Inc.
Largest Position
$1.10B
Insider Transactions (90d)
27
Latest Filing Quarter
Q2 2026
New Institutional Positions
96
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 | $696,504,914 | -$402,469,326 | -36.62% | |
| Vanguard Portfolio Management Llc | 0.02% | 3,349,436 | $425,009,934 | $269,361,643 | -$155,648,291 | -36.62% | |
| Vanguard Capital Management Llc | 0.01% | 2,462,745 | $312,497,713 | $198,053,953 | -$114,443,760 | -36.62% | |
| Capital World Investors | 0.04% | 2,398,036 | $304,286,788 | $192,850,055 | -$111,436,733 | -36.62% | |
| State Street Corp | 0.01% | 2,188,254 | $277,667,550 | $175,979,387 | -$101,688,163 | -36.62% | |
| Geode Capital Management, Llc | 0.01% | 1,487,797 | $188,823,702 | $119,648,635 | -$69,175,067 | -36.63% | |
| Invesco Ltd. | 0.01% | 1,170,080 | $148,471,451 | $94,097,834 | -$54,373,617 | -36.62% | |
| Dimensional Fund Advisors Lp | 0.02% | 954,474 | $121,073,364 | $76,758,799 | -$44,314,565 | -36.60% | |
| Wcm Investment Management, Llc | 0.20% | 917,651 | $109,090,351 | $73,797,493 | -$35,292,858 | -32.35% | |
| Tekne Capital Management, Llc | 30.62% | 737,500 | $93,580,000 | $59,309,750 | -$34,270,250 | -36.62% | |
| Morgan Stanley | 0.00% | 700,185 | $88,846,553 | $56,308,878 | -$32,537,675 | -36.62% | |
| Fmr Llc | 0.00% | 672,184 | $85,293,428 | $54,057,037 | -$31,236,391 | -36.62% | |
| Fuller & Thaler Asset Management, Inc. | 0.22% | 639,448 | $81,139,542 | $51,424,408 | -$29,715,134 | -36.62% | |
| Gilder Gagnon Howe & Co Llc | 0.83% | 637,058 | $80,836,290 | $51,232,204 | -$29,604,086 | -36.62% | |
| Citadel Advisors Llc | 0.05% | 636,836 | $80,808,120 | $51,214,351 | -$29,593,769 | -36.62% | |
| Capital International Investors | 0.02% | 623,429 | $79,106,906 | $50,136,160 | -$28,970,746 | -36.62% | |
| Northern Trust Corp | 0.01% | 569,126 | $72,216,397 | $45,769,113 | -$26,447,284 | -36.62% | |
| Charles Schwab Investment Management Inc | 0.01% | 526,760 | $66,840,576 | $42,362,039 | -$24,478,537 | -36.62% | |
| Sixth Street Partners Management Company, L.P. | 0.01% | 526,760 | $66,840,576 | $42,362,039 | -$24,478,537 | -36.62% | |
| Bank Of America Corp | 0.00% | 479,706 | $60,869,894 | $38,577,957 | -$22,291,937 | -36.62% | |
| Tidal Investments Llc | 0.14% | 470,937 | $59,757,196 | $37,872,754 | -$21,884,442 | -36.62% | |
| Goldman Sachs Group Inc | 0.01% | 426,243 | $54,085,973 | $34,278,462 | -$19,807,511 | -36.62% | |
| Vanguard Fiduciary Trust Co | 0.01% | 404,100 | $51,276,249 | $32,497,722 | -$18,778,527 | -36.62% | |
| Ubs Group Ag | 0.01% | 402,473 | $51,069,799 | $32,366,879 | -$18,702,920 | -36.62% | |
| Principal Financial Group Inc | 0.02% | 370,913 | $47,065,150 | $29,828,823 | -$17,236,327 | -36.62% | |
| Wexford Capital Lp | 6.19% | 355,400 | $45,096,706 | $28,581,268 | -$16,515,438 | -36.62% | |
| Raiffeisen Bank International Ag | 0.50% | 360,000 | $42,796,800 | $28,951,200 | -$13,845,600 | -32.35% | |
| Janus Henderson Group Plc | 0.02% | 1,085,634 | $42,697,985 | $87,306,686 | +$44,608,701 | +104.47% | |
| Bank Of New York Mellon Corp | 0.01% | 326,284 | $41,402,116 | $26,239,759 | -$15,162,357 | -36.62% | |
| Aqr Capital Management Llc | 0.01% | 314,172 | $39,865,285 | $25,265,712 | -$14,599,573 | -36.62% | |
| First Trust Advisors Lp | 0.02% | 306,034 | $38,832,654 | $24,611,254 | -$14,221,400 | -36.62% | |
| Value Aligned Research Advisors, Llc | 0.45% | 955,927 | $37,615,727 | $76,875,649 | +$39,259,922 | +104.37% | |
| Penn Capital Management Company, Llc | 2.30% | 285,790 | $36,331,890 | $22,983,232 | -$13,348,658 | -36.74% | |
| Qube Research & Technologies Ltd | 0.04% | 280,015 | $35,531,103 | $22,518,806 | -$13,012,297 | -36.62% | |
| Oasis Management Co Ltd. | 3.76% | 274,525 | $34,834,477 | $22,077,301 | -$12,757,177 | -36.62% | |
| Mackenzie Financial Corp | 0.03% | 268,004 | $34,007,028 | $21,552,882 | -$12,454,146 | -36.62% | |
| Susquehanna International Group, Llp | 0.03% | 253,671 | $32,188,313 | $20,400,222 | -$11,788,091 | -36.62% | |
| My.Alpha Management Hk Advisors Ltd | 12.19% | 249,500 | $31,659,055 | $20,064,790 | -$11,594,265 | -36.62% | |
| Renaissance Technologies LLC | Jim Simons | 0.04% | 229,800 | $29,159,322 | $18,480,516 | -$10,678,806 | -36.62% |
| 12 West Capital Management Lp | 5.34% | 225,000 | $28,550,250 | $18,094,500 | -$10,455,750 | -36.62% | |
| Congress Asset Management Co | 0.17% | 223,855 | $28,404,961 | $18,002,419 | -$10,402,542 | -36.62% | |
| Russell Investments Group, Ltd. | 0.02% | 221,775 | $28,141,120 | $17,835,146 | -$10,305,975 | -36.62% | |
| Two Sigma Investments, Lp | 0.02% | 212,544 | $26,969,708 | $17,092,788 | -$9,876,920 | -36.62% | |
| Citigroup Inc | 0.01% | 209,845 | $26,627,232 | $16,875,735 | -$9,751,497 | -36.62% | |
| Jpmorgan Chase & Co | 0.00% | 214,853 | $25,828,700 | $17,278,478 | -$8,550,222 | -33.10% | |
| Public Sector Pension Investment Board | 0.07% | 196,012 | $24,871,963 | $15,763,285 | -$9,108,678 | -36.62% | |
| Jacobs Levy Equity Management, Inc | 0.09% | 191,966 | $24,358,566 | $15,437,906 | -$8,920,660 | -36.62% | |
| New York State Common Retirement Fund | 0.03% | 191,535 | $24,303,876 | $15,403,245 | -$8,900,631 | -36.62% | |
| Steamboat Capital Partners, Llc | 4.96% | 182,773 | $23,192,066 | $14,698,605 | -$8,493,461 | -36.62% | |
| Portolan Capital Management, Llc | 0.84% | 177,432 | $22,514,346 | $14,269,081 | -$8,245,265 | -36.62% |
Frequently asked questions about ACMR
Who owns the most ACMR stock?
The largest holders of ACMR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ACM RESEARCH INC-CLASS A (ACMR).
Is ACMR widely held by superinvestors?
Many widely followed stocks like ACMR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ACMR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.