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 have beem 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 | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-04-17 09:35 am Sale | 2025-03-31 | 13G | ACM Research, Inc. ACMR | BlackRock Inc. BLK | 3,828,440 6.600% | -613,897 (-13.82%) | Filing History |
| 2024-11-13 12:15 pm Sale | 2024-09-30 | 13G | ACM Research, Inc. ACMR | Yiheng Capital Management L.P. | 666,304 1.200% | -4,696,825 (-87.58%) | Filing History |
| 2024-11-08 5:31 pm Unchanged | 2024-09-30 | 13G | ACM Research, Inc. ACMR | BlackRock Inc. BLK | 4,442,337 7.700% | 0 (Unchanged) | Filing History |
| 2024-10-29 9:30 pm Unchanged | 2024-10-25 | 13D | ACM Research, Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,358,728 5.800% | 0 (Unchanged) | Filing History |
| 2024-10-22 3:24 pm Purchase | 2024-09-30 | 13G | ACM Research, Inc. ACMR | BlackRock Inc. BLK | 4,442,337 7.700% | 716,812 (+19.24%) | Filing History |
| 2024-10-08 9:38 pm Sale | 2024-10-04 | 13D | ACM Research, Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,358,728 5.800% | -79,782 (-2.32%) | Filing History |
| 2024-02-14 4:06 pm Purchase | 2023-12-31 | 13G | ACM Research, Inc. ACMR | Yiheng Capital Management L.P. | 5,363,129 9.650% | 96,329 (+1.83%) | Filing History |
| 2024-02-13 4:55 pm Purchase | 2023-12-29 | 13G | ACM Research, Inc. ACMR | The Vanguard Group | 4,057,397 7.300% | 1,157,977 (+39.94%) | Filing History |
| 2024-01-26 5:25 pm Purchase | 2023-12-31 | 13G | ACM Research, Inc. ACMR | BlackRock Inc. BLK | 3,725,525 6.700% | 504,095 (+15.65%) | Filing History |
| 2023-07-18 08:50 am Unchanged | 2023-07-18 | 13D | ACM Research, Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,438,510 6.300% | 0 (Unchanged) | Filing History |
| 2023-07-18 08:49 am Unchanged | 2023-07-18 | 13G | ACM Research, Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,438,510 6.300% | 0 (Unchanged) | Filing History |
| 2023-06-13 5:02 pm Unchanged | 2023-05-29 | 13D | ACM Research, Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,438,510 6.300% | 0 (Unchanged) | Filing History |
| 2023-06-13 5:00 pm Purchase | 2022-12-31 | 13G | ACM Research, Inc. ACMR | Shanghai Science & Technology Venture Capital (Group) Co. Ltd. | 3,438,510 6.300% | 3,438,510 (New Position) | Filing History |
| 2023-02-14 4:05 pm Purchase | 2022-12-31 | 13G | ACM Research, Inc. ACMR | Yiheng Capital Management L.P. | 5,266,800 9.690% | 1,021,500 (+24.06%) | Filing History |
| 2023-02-13 2:57 pm Purchase | 2022-12-31 | 13G | ACM Research, Inc. ACMR | BlackRock Inc. BLK | 3,221,430 5.900% | 3,221,430 (New Position) | Filing History |
| 2023-02-09 4:42 pm Sale | 2023-01-31 | 13G | ACM Research, Inc. ACMR | MORGAN STANLEY MS | 390,606 0.700% | -2,382,898 (-85.92%) | Filing History |
| 2023-02-09 10:54 am Purchase | 2022-12-30 | 13G | ACM Research, Inc. ACMR | The Vanguard Group | 2,899,420 5.330% | 2,899,420 (New Position) | Filing History |
| 2023-02-08 12:59 pm Sale | 2022-12-30 | 13G | ACM Research, Inc. ACMR | MORGAN STANLEY MS | 2,773,504 5.100% | -1,120,244 (-28.77%) | Filing History |
| 2022-02-14 4:26 pm Purchase | 2021-12-31 | 13G | ACM Research, Inc. ACMR | Yiheng Capital Management L.P. | 4,245,300 8.200% | 4,245,300 (New Position) | Filing History |
| 2022-02-09 4:07 pm Purchase | 2021-12-31 | 13G | ACM Research, Inc. ACMR | MORGAN STANLEY MS | 3,893,748 7.300% | 831,474 (+27.15%) | Filing History |