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
What is insider trading>>
Time period
Reported
DateTime		TypeCompany
Symbol		Filed By
Symbol		Shares Owned
% Owned		Shares Vs. Prev ReportFiling
2024-02-14
4:06 pm
Purchase		13GACM RESH INC
ACMR		Yiheng Capital Management L.P.5,363,129
9.65%		96,329increase
(+1.83%)		View
2024-02-13
4:55 pm
Purchase		13GACM RESH INC
ACMR		VANGUARD GROUP INC4,057,397
7.3%		1,157,977increase
(+39.94%)		View
2024-01-26
5:25 pm
Purchase		13GACM RESH INC
ACMR		BlackRock Inc.
BLK		3,725,525
6.7%		504,095increase
(+15.65%)		View
2023-07-18
08:50 am
Unchanged		13DACM RESH INC
ACMR		Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.3%		0
(Unchanged)		View
2023-07-18
08:49 am
Unchanged		13GACM RESH INC
ACMR		Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.3%		0
(Unchanged)		View
2023-06-13
5:02 pm
Unchanged		13DACM RESH INC
ACMR		Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.3%		0
(Unchanged)		View
2023-06-13
5:00 pm
Purchase		13GACM RESH INC
ACMR		Shanghai Science & Technology Venture Capital (Group) Co. Ltd.3,438,510
6.3%		3,438,510increase
(New Position)		View
2023-02-14
4:05 pm
Purchase		13GACM RESH INC
ACMR		Yiheng Capital Management L.P.5,266,800
9.69%		3,851,700increase
(+272.19%)		View
2023-02-13
2:57 pm
Purchase		13GACM RESH INC
ACMR		BlackRock Inc.
BLK		3,221,430
5.9%		3,221,430increase
(New Position)		View
2023-02-09
4:42 pm
Sale		13GACM RESH INC
ACMR		MORGAN STANLEY
MS		390,606
0.7%		-2,382,898decrease
(-85.92%)		View
2023-02-09
10:54 am
Purchase		13GACM RESH INC
ACMR		VANGUARD GROUP INC2,899,420
5.33%		2,899,420increase
(New Position)		View
2023-02-08
12:59 pm
Purchase		13GACM RESH INC
ACMR		MORGAN STANLEY
MS		2,773,504
5.1%		1,475,588increase
(+113.69%)		View
2022-02-14
4:26 pm
Purchase		13GACM RESH INC
ACMR		Yiheng Capital Management L.P.1,415,100
8.2%		1,415,100increase
(New Position)		View
2022-02-09
4:07 pm
Purchase		13GACM RESH INC
ACMR		MORGAN STANLEY
MS		1,297,916
7.3%		277,158increase
(+27.15%)		View
2021-08-19
4:11 pm
Purchase		13GACM RESH INC
ACMR		MORGAN STANLEY
MS		1,020,758
5.8%		1,020,758increase
(New Position)		View
2021-02-12
4:14 pm
Sale		13GACM RESH INC
ACMR		GIC Private Ltd653,020
3.92%		-187,795decrease
(-22.33%)		View
2020-05-22
4:10 pm
Purchase		13GACM RESH INC
ACMR		GIC Private Ltd840,815
5.15%		840,815increase
(New Position)		View