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 |
2020-05-18 Sale |
2020-05-20 6:34 pm |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
1,522 | $14.77 | $22,479 | 91,379 (Direct) |
View |
2020-05-01 Sale |
2020-05-05 4:35 pm |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
5,826 | $12.07 | $70,301 | 214,680 (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 |
2025-02-20 Option Award |
2025-02-21 8:16 pm |
N/A 2035-02-19 |
Caribou Biosciences Inc. | CRBU | Sacks Natalie Director |
40,500 | $0 | 40,500 (Direct) |
View |
2024-02-20 Option Award |
2024-02-22 5:08 pm |
N/A 2034-02-19 |
Caribou Biosciences Inc. | CRBU | Sacks Natalie Director |
39,500 | $0 | 39,500 (Direct) |
View |
2023-02-21 Option Award |
2023-02-23 5:12 pm |
N/A 2033-02-20 |
Caribou Biosciences Inc. | CRBU | Sacks Natalie Director |
21,500 | $0 | 21,500 (Direct) |
View |
2022-12-21 Option Award |
2022-12-23 7:00 pm |
N/A 2032-12-20 |
Zymeworks Inc. | ZYME | Sacks Natalie Director |
25,000 | $0 | 25,000 (Direct) |
View |
2022-01-28 Option Award |
2022-02-01 4:07 pm |
N/A 2032-01-27 |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
155,000 | $0 | 155,000 (Direct) |
View |
2021-12-20 Option Award |
2021-12-21 5:38 pm |
N/A 2031-12-19 |
Caribou Biosciences Inc. | CRBU | Sacks Natalie Director |
27,500 | $0 | 27,500 (Direct) |
View |
2021-11-11 Option Award |
2021-11-15 4:03 pm |
N/A 2031-11-11 |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
155,000 | $0 | 155,000 (Direct) |
View |
Ownership |
2021-07-22 8:57 pm |
N/A 2028-06-11 |
Caribou Biosciences Inc. | CRBU | Sacks Natalie Director |
0 | $0 | 90,900 (Direct) |
View |
2021-05-06 Option Award |
2021-05-07 8:45 pm |
N/A 2031-05-05 |
Zymeworks Inc. | ZYME | Sacks Natalie Director |
9,000 | $0 | 9,000 (Direct) |
View |
2021-01-28 Option Award |
2021-01-29 8:00 pm |
N/A 2031-01-27 |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
80,000 | $0 | 80,000 (Direct) |
View |
2020-05-18 Exercise |
2020-05-20 6:34 pm |
N/A N/A |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
1,522 | $2.12 | 91,379 (Direct) |
View |
2020-05-18 Exercise |
2020-05-20 6:34 pm |
N/A 2028-11-16 |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
1,522 | $0 | 91,379 (Direct) |
View |
2020-05-08 Option Award |
2020-05-12 06:32 am |
N/A 2030-05-07 |
Zymeworks Inc. | ZYME | Sacks Natalie Director |
9,000 | $0 | 9,000 (Direct) |
View |
2020-05-01 Exercise |
2020-05-05 4:35 pm |
N/A N/A |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
5,826 | $2.12 | 214,680 (Direct) |
View |
2020-05-01 Exercise |
2020-05-05 4:35 pm |
N/A 2028-10-17 |
Harpoon Therapeutics Inc. | HARP | Sacks Natalie Chief Medical Officer |
5,826 | $0 | 214,680 (Direct) |
View |