Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- 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>>
Common stock purchase or sale:
| Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
| 2025-09-17 Sale | 2025-09-19 4:30 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $33 | $495,000 | 170,772 (Direct) | View |
| 2025-07-15 Sale | 2025-07-17 4:30 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $30 | $450,000 | 185,772 (Direct) | View |
| 2024-02-28 Sale | 2024-03-01 9:30 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 12,500 | $25.2 | $315,000 | 130,272 (Direct) | View |
| 2023-12-26 Sale | 2023-12-28 9:02 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 10,000 | $20 | $200,000 | 142,772 (Direct) | View |
| 2023-11-20 Sale | 2023-11-22 4:15 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $17.91 | $268,650 | 36,924 (Direct) | View |
| 2021-02-12 Sale | 2021-02-16 6:05 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 2,000 | $120 | $240,000 | 36,924 (Direct) | View |
| 2021-02-09 Sale | 2021-02-11 5:30 pm | ACM Research Inc. | ACMR | Liu Tracy Director | 2,000 | $110 | $220,000 | 38,924 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
| Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
| 2025-09-17 Exercise | 2025-09-19 4:30 pm | N/A 2026-12-27 | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $0 | 170,772 (Direct) | View |
| 2025-09-17 Exercise | 2025-09-19 4:30 pm | N/A N/A | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $1 | 170,772 (Direct) | View |
| 2025-08-12 Option Award | 2025-08-14 4:30 pm | N/A 2035-08-11 | ACM Research Inc. | ACMR | Liu Tracy Director | 20,000 | $0 | 20,000 (Direct) | View |
| 2025-07-15 Exercise | 2025-07-17 4:30 pm | N/A 2026-12-27 | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $0 | 185,772 (Direct) | View |
| 2025-07-15 Exercise | 2025-07-17 4:30 pm | N/A N/A | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $1 | 185,772 (Direct) | View |
| 2024-08-12 Option Award | 2024-08-20 9:00 pm | N/A 2034-08-11 | ACM Research Inc. | ACMR | Liu Tracy Director | 20,000 | $0 | 20,000 (Direct) | View |
| 2024-02-28 Exercise | 2024-03-01 9:30 pm | N/A N/A | ACM Research Inc. | ACMR | Liu Tracy Director | 12,500 | $5.6 | 130,272 (Direct) | View |
| 2024-02-28 Exercise | 2024-03-01 9:30 pm | N/A 2029-04-22 | ACM Research Inc. | ACMR | Liu Tracy Director | 12,500 | $0 | 130,272 (Direct) | View |
| 2023-12-26 Exercise | 2023-12-28 9:02 pm | N/A N/A | ACM Research Inc. | ACMR | Liu Tracy Director | 10,000 | $5.6 | 142,772 (Direct) | View |
| 2023-12-26 Exercise | 2023-12-28 9:02 pm | N/A 2029-04-22 | ACM Research Inc. | ACMR | Liu Tracy Director | 10,000 | $0 | 142,772 (Direct) | View |
| 2023-11-20 Exercise | 2023-11-22 4:15 pm | N/A 2030-03-19 | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $0 | 36,924 (Direct) | View |
| 2023-11-20 Exercise | 2023-11-22 4:15 pm | N/A N/A | ACM Research Inc. | ACMR | Liu Tracy Director | 15,000 | $7.36 | 36,924 (Direct) | View |
| 2023-08-10 Option Award(A) | 2023-08-21 9:19 pm | N/A 2033-08-09 | ACM Research Inc. | ACMR | Liu Tracy Director | 54,000 | $0 | 54,000 (Direct) | View |
| 2023-08-10 Option Award | 2023-08-14 5:30 pm | N/A 2033-08-09 | ACM Research Inc. | ACMR | Liu Tracy Director | 54,000 | $0 | 54,000 (Direct) | View |
| 2022-06-30 Option Award | 2022-07-05 5:31 pm | N/A 2032-06-29 | ACM Research Inc. | ACMR | Liu Tracy Director | 24,000 | $0 | 24,000 (Direct) | View |
| 2021-02-22 Option Award(A) | 2021-03-05 9:46 pm | N/A 2031-02-21 | ACM Research Inc. | ACMR | Liu Tracy Director | 5,000 | $0 | 5,000 (Direct) | View |
| 2021-02-22 Option Award | 2021-03-03 5:31 pm | N/A 2031-02-21 | ACM Research Inc. | ACMR | Liu Tracy Director | 5,000 | $0 | 5,000 (Direct) | View |