ACM 研究公司
US ˙ NasdaqGM ˙ US00108J1097

SecurityACMR / ACM Research, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership390,606 shares
Ownership 0.70%
Morgan Stanley ownership in ACMR / ACM Research, Inc.

2023-02-09 - Morgan Stanley has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 390,606 shares of ACM Research, Inc. (US:ACMR). This represents 0.7 percent ownership of the company. In their previous filing dated 2023-02-08 , Morgan Stanley had reported owning 2,773,504 shares, indicating a decrease of -85.92 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2023-02-09 2023-02-09 13G/A 2,773,504 390,606 -85.92 0.70 -86.27
2023-02-08 2023-02-08 13G/A 1,297,916 2,773,504 113.69 5.10 -30.14
2022-02-09 2022-02-09 13G/A 1,020,758 1,297,916 27.15 7.30 25.86
2021-08-19 2021-08-19 13G 1,020,758 5.80

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 1,192,705 -199,601 -14.34 46,933 -14.55 0.0028
2026-05-27 2025-12-31 13F/A-1 ACM RESH COM CL A 00108J109 1,392,306 515,340 58.76 54,926 60.06 0.0033
2026-02-13 2025-12-31 13F ACM RESH COM CL A 00108J109 1,392,306 515,340 54,926 0.0033
2026-05-27 2025-09-30 13F/A-1 ACM RESH COM CL A 00108J109 876,966 325,186 58.93 34,316 140.12 0.0021
2025-11-14 2025-09-30 13F ACM RESH COM CL A 00108J109 876,966 325,186 34,316 0.0021
2025-08-15 2025-06-30 13F ACM RESH COM CL A 00108J109 551,780 77,044 16.23 14,291 28.98 0.0009
2025-05-15 2025-03-31 13F ACM RESH COM CL A 00108J109 474,736 62,283 15.10 11,080 77.91 0.0008
2025-05-15 2024-12-31 13F/A-1 ACM RESH COM CL A 00108J109 412,453 -1,378,994 -76.98 6,228 -82.87 0.0004
2025-02-14 2024-12-31 13F ACM RESH COM CL A 00108J109 412,453 -1,378,994 6,228 0.0004
2025-05-14 2024-09-30 13F/A-2 ACM RESH COM CL A 00108J109 1,791,447 651,740 57.18 36,366 38.37 0.0026
2025-02-14 2024-09-30 13F/A-1 ACM RESH COM CL A 00108J109 1,791,447 651,740 36,366 0.0026
2024-11-14 2024-09-30 13F ACM RESH COM CL A 00108J109 1,791,447 651,740 36,366 0.0026
2025-05-14 2024-06-30 13F/A-2 ACM RESH COM CL A 00108J109 1,139,707 178,060 18.52 26,282 -6.21 0.0020
2024-10-17 2024-06-30 13F/A-1 ACM RESH COM CL A 00108J109 1,139,707 178,060 26,282 0.0020
2024-08-14 2024-06-30 13F ACM RESH COM CL A 00108J109 1,139,707 178,060 26,282 0.0020
2024-10-17 2024-03-31 13F/A-2 ACM RESH COM CL A 00108J109 961,647 373,307 63.45 28,022 143.75 0.0022
2024-08-16 2024-03-31 13F/A-1 ACM RESH COM CL A 00108J109 961,647 373,307 28,022 0.0022
2024-05-15 2024-03-31 13F ACM RESH COM CL A 00108J109 961,647 373,307 28,022 0.0022
2024-08-16 2023-12-31 13F/A-1 ACM RESH COM CL A 00108J109 588,340 -2,746 -0.46 11,496 7.43 0.0010
2024-02-13 2023-12-31 13F ACM RESH COM CL A 00108J109 588,340 -2,746 11,496 0.0010
2023-11-15 2023-09-30 13F ACM RESH COM CL A 00108J109 591,086 364,428 160.78 10,702 261.03 0.0011
2023-08-14 2023-06-30 13F ACM RESH COM CL A 00108J109 226,658 -164,282 -42.02 2,965 -35.20 0.0003
2023-05-15 2023-03-31 13F ACM RESH COM CL A 00108J109 390,940 -2,406,549 -86.03 4,574 -78.79 0.0005
2023-02-14 2022-12-31 13F ACM RESH COM CL A 00108J109 2,797,489 -2,090,824 -42.77 21,569 -64.59 0.0024
2022-11-14 2022-09-30 13F ACM RESH COM CL A 00108J109 4,888,313 -305,655 -5.88 60,908 -30.32 0.0083
2022-10-27 2022-06-30 13F/A-1 ACM RESH COM CL A 00108J109 5,193,968 1,410,886 37.29 87,414 11.68 0.0113
2022-08-15 2022-06-30 13F ACM RESH COM CL A 00108J109 5,193,968 1,410,886 87,414 0.0113
2022-10-27 2022-03-31 13F/A-1 ACM RESH COM CL A 00108J109 3,783,082 2,484,917 191.42 78,272 -29.29 0.0106
2022-05-13 2022-03-31 13F ACM RESH COM CL A 00108J109 3,783,082 2,484,917 78,272 0.0106
2022-02-14 2021-12-31 13F ACM RESH COM CL A 00108J109 1,298,165 -129,386 -9.06 110,694 -29.51 0.0137
2021-11-15 2021-09-30 13F ACM RESH COM CL A 00108J109 1,427,551 1,346,885 1,669.71 157,030 1,804.32 0.0211
2021-08-23 2021-06-30 13F/A-1 ACM RESH COM CL A 00108J109 80,666 30,609 61.15 8,246 103.91 0.0011
2021-08-16 2021-06-30 13F ACM RESH COM CL A 00108J109 80,666 30,609 8,246 0.0002
2021-05-17 2021-03-31 13F ACM RESEARCH COM CL A 00108J109 50,057 2,223 4.65 4,044 4.04 0.0006
2021-02-16 2020-12-31 13F ACM RESEARCH COM CL A 00108J109 47,834 36,221 311.90 3,887 384.66 0.0006
2020-11-13 2020-09-30 13F ACM RESEARCH COM CL A 00108J109 11,613 -2,796 -19.40 802 -10.79 0.0002
2020-08-14 2020-06-30 13F ACM RESEARCH COM CL A 00108J109 14,409 6,598 84.47 899 289.18 0.0002
2020-05-26 2020-03-31 13F/A-1 ACM RESEARCH COM CL A 00108J109 7,811 -32,824 -80.78 231 -69.16 0.0001
2020-05-15 2020-03-31 13F ACM RESEARCH COM CL A 00108J109 7,811 -32,824 231 17.7456
2020-02-14 2019-12-31 13F ACM RESEARCH COM CL A 00108J109 40,635 38,461 1,769.14 749 2,396.67 0.0002
2019-11-14 2019-09-30 13F ACM RESEARCH COM CL A 00108J109 2,174 -9,212 -80.91 30 -83.05 0.0000
2019-08-14 2019-06-30 13F ACM RESEARCH COM CL A 00108J109 11,386 7,850 222.00 177 227.78 0.0000
2019-05-15 2019-03-31 13F ACM RESEARCH COM CL A 00108J109 3,536 -9,878 -73.64 54 -63.01 0.0000
2019-02-14 2018-12-31 13F ACM RESEARCH COM CL A 00108J109 13,414 -4,347 -24.47 146 -25.89 0.0000
2019-04-23 2018-09-30 13F/A-2 ACM RESEARCH COM CL A 00108J109 17,761 133 0.75 197 3.68 0.0000
2018-11-20 2018-09-30 13F/A-1 ACM RESEARCH COM CL A 00108J109 17,761 0 197 0.0000
2018-11-14 2018-09-30 13F ACM RESEARCH COM CL A 00108J109 17,761 133 197
2019-04-23 2018-06-30 13F/A-1 ACM RESEARCH COM CL A 00108J109 17,628 17,158 3,650.64 190 3,066.67 0.0001
2018-08-14 2018-06-30 13F ACM RESEARCH COM CL A 00108J109 17,628 17,158 190
2019-04-23 2018-03-31 13F/A-1 ACM RESEARCH COM CL A 00108J109 470 470 6 0.0000
2018-05-14 2018-03-31 13F ACM RESEARCH COM CL A 00108J109 470 6 0.0000
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.