Activist 13D/13G Filings - ACM Research Inc. (ACMR)

Real time Form 13D and 13G transaction reports:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
  • Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
  • Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Time period
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Reported
DateTime
TypeCompany
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev ReportFiling
2024-11-08
5:31 pm
Unchanged
13GACM Research Inc.
ACMR
BlackRock Inc.
BLK
4,442,337
7.700%
0
(Unchanged)
View
2024-10-29
9:30 pm
Unchanged
13DACM Research Inc.
ACMR
Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,358,728
5.800%
0
(Unchanged)
View
2024-10-22
3:24 pm
Purchase
13GACM Research Inc.
ACMR
BlackRock Inc.
BLK
4,442,337
7.700%
4,442,337increase
(New Position)
View
2024-10-08
9:38 pm
Sale
13DACM Research Inc.
ACMR
Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,358,728
5.800%
-79,782decrease
(-2.32%)
View
2024-02-14
4:06 pm
Purchase
13GACM Research Inc.
ACMR
Yiheng Capital Management L.P.5,363,129
9.650%
96,329increase
(+1.83%)
View
2024-02-13
4:55 pm
Purchase
13GACM Research Inc.
ACMR
VANGUARD GROUP INC4,057,397
7.300%
1,157,977increase
(+39.94%)
View
2024-01-26
5:25 pm
Purchase
13GACM Research Inc.
ACMR
BlackRock Inc.
BLK
3,725,525
6.700%
504,095increase
(+15.65%)
View
2023-07-18
08:50 am
Unchanged
13DACM Research Inc.
ACMR
Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.300%
0
(Unchanged)
View
2023-07-18
08:49 am
Unchanged
13GACM Research Inc.
ACMR
Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.300%
0
(Unchanged)
View
2023-06-13
5:02 pm
Unchanged
13DACM Research Inc.
ACMR
Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.300%
0
(Unchanged)
View
2023-06-13
5:00 pm
Purchase
13GACM Research Inc.
ACMR
Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.300%
3,438,510increase
(New Position)
View
2023-02-14
4:05 pm
Purchase
13GACM Research Inc.
ACMR
Yiheng Capital Management L.P.5,266,800
9.690%
3,851,700increase
(+272.19%)
View
2023-02-13
2:57 pm
Purchase
13GACM Research Inc.
ACMR
BlackRock Inc.
BLK
3,221,430
5.900%
3,221,430increase
(New Position)
View
2023-02-09
4:42 pm
Sale
13GACM Research Inc.
ACMR
MORGAN STANLEY
MS
390,606
0.700%
-2,382,898decrease
(-85.92%)
View
2023-02-09
10:54 am
Purchase
13GACM Research Inc.
ACMR
VANGUARD GROUP INC2,899,420
5.330%
2,899,420increase
(New Position)
View
2023-02-08
12:59 pm
Purchase
13GACM Research Inc.
ACMR
MORGAN STANLEY
MS
2,773,504
5.100%
1,475,588increase
(+113.69%)
View
2022-02-14
4:26 pm
Purchase
13GACM Research Inc.
ACMR
Yiheng Capital Management L.P.1,415,100
8.200%
1,415,100increase
(New Position)
View
2022-02-09
4:07 pm
Purchase
13GACM Research Inc.
ACMR
MORGAN STANLEY
MS
1,297,916
7.300%
277,158increase
(+27.15%)
View
2021-08-19
4:11 pm
Purchase
13GACM Research Inc.
ACMR
MORGAN STANLEY
MS
1,020,758
5.800%
1,020,758increase
(New Position)
View
2021-02-12
4:14 pm
Sale
13GACM Research Inc.
ACMR
GIC Private Ltd653,020
3.920%
-187,795decrease
(-22.33%)
View
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