ACM Research, Inc.
US ˙ NasdaqGM ˙ US00108J1097

SecurityACMR / ACM Research, Inc.
InstitutionQube Research & Technologies Ltd
Latest Disclosed Ownership724,405 shares
Latest Disclosed Value $ 28,505,337
Qube Research & Technologies Ltd reports 395.97% increase in ownership of ACMR / ACM Research, Inc.

On May 15, 2026 - Qube Research & Technologies Ltd filed a 13F-HR form disclosing ownership of 724,405 shares of ACM Research, Inc. (US:ACMR) valued at $28,505,337 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 146,059 shares of ACM Research, Inc.. This represents a change in shares of 395.97% during the quarter. The current value of the position is $65,344,953 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ACM RESH COM CL A 00108J109 724,405 578,346 395.97 28,505 394.71 0.0317
2026-02-17 2025-12-31 13F ACM RESH COM CL A 00108J109 146,059 146,059 5,762 0.0059
2025-11-14 2025-09-30 13F ACM RESH COM CL A 00108J109 0 -365,291 -100.00 0 -100.00
2025-08-14 2025-06-30 13F ACM RESH COM CL A 00108J109 365,291 248,093 211.69 9,461 245.92 0.0096
2025-05-15 2025-03-31 13F ACM RESH COM CL A 00108J109 117,198 -125,063 -51.62 2,735 -25.23 0.0032
2025-02-14 2024-12-31 13F ACM RESH COM CL A 00108J109 242,261 26,105 12.08 3,658 -16.62 0.0048
2024-11-14 2024-09-30 13F ACM RESH COM CL A 00108J109 216,156 -140,458 -39.39 4,388 -46.65 0.0065
2024-08-14 2024-06-30 13F ACM RESH COM CL A 00108J109 356,614 249,275 232.23 8,224 162.97 0.0130
2024-05-14 2024-03-31 13F ACM RESH COM CL A 00108J109 107,339 107,339 3,128 0.0050
2020-11-12 2020-09-30 13F ACM RESEARCH COM CL A 00108J109 0 -9,182 -100.00 0 -100.00
2020-08-14 2020-06-30 13F ACM RESEARCH COM CL A 00108J109 9,182 9,182 573 0.0084
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.