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>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | Filing |
| 2024-11-08 5:31 pm Unchanged | 13G | ACM Research Inc. ACMR | BlackRock Inc. | 4,442,337 7.700% | 0 (Unchanged) | View |
| 2024-10-29 9:30 pm Unchanged | 13D | ACM 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 | 13G | ACM Research Inc. ACMR | BlackRock Inc. | 4,442,337 7.700% | 4,442,337 (New Position) | View |
| 2024-10-08 9:38 pm Sale | 13D | ACM Research Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,358,728 5.800% | -79,782 (-2.32%) | View |
| 2024-02-14 4:06 pm Purchase | 13G | ACM Research Inc. ACMR | Yiheng Capital Management L.P. | 5,363,129 9.650% | 96,329 (+1.83%) | View |
| 2024-02-13 4:55 pm Purchase | 13G | ACM Research Inc. ACMR | VANGUARD GROUP INC | 4,057,397 7.300% | 1,157,977 (+39.94%) | View |
| 2024-01-26 5:25 pm Purchase | 13G | ACM Research Inc. ACMR | BlackRock Inc. BLK | 3,725,525 6.700% | 504,095 (+15.65%) | View |
| 2023-07-18 08:50 am Unchanged | 13D | ACM 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 | 13G | ACM 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 | 13D | ACM 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 | 13G | ACM Research Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,438,510 6.300% | 3,438,510 (New Position) | View |
| 2023-02-14 4:05 pm Purchase | 13G | ACM Research Inc. ACMR | Yiheng Capital Management L.P. | 5,266,800 9.690% | 3,851,700 (+272.19%) | View |
| 2023-02-13 2:57 pm Purchase | 13G | ACM Research Inc. ACMR | BlackRock Inc. BLK | 3,221,430 5.900% | 3,221,430 (New Position) | View |
| 2023-02-09 4:42 pm Sale | 13G | ACM Research Inc. ACMR | MORGAN STANLEY MS | 390,606 0.700% | -2,382,898 (-85.92%) | View |
| 2023-02-09 10:54 am Purchase | 13G | ACM Research Inc. ACMR | VANGUARD GROUP INC | 2,899,420 5.330% | 2,899,420 (New Position) | View |
| 2023-02-08 12:59 pm Purchase | 13G | ACM Research Inc. ACMR | MORGAN STANLEY MS | 2,773,504 5.100% | 1,475,588 (+113.69%) | View |
| 2022-02-14 4:26 pm Purchase | 13G | ACM Research Inc. ACMR | Yiheng Capital Management L.P. | 1,415,100 8.200% | 1,415,100 (New Position) | View |
| 2022-02-09 4:07 pm Purchase | 13G | ACM Research Inc. ACMR | MORGAN STANLEY MS | 1,297,916 7.300% | 277,158 (+27.15%) | View |
| 2021-08-19 4:11 pm Purchase | 13G | ACM Research Inc. ACMR | MORGAN STANLEY MS | 1,020,758 5.800% | 1,020,758 (New Position) | View |
| 2021-02-12 4:14 pm Sale | 13G | ACM Research Inc. ACMR | GIC Private Ltd | 653,020 3.920% | -187,795 (-22.33%) | View |