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 |
2023-09-15 Purchase |
2023-09-19 4:49 pm |
Ambrx Biopharma Inc. | AMAM | Cormorant Asset Management LP Chen Bihua Cormorant Global Healthcare Master Fund LP Cormorant Private Healthcare Fund III LP 10% Owner |
2,152,738 | $9.1166 | $19,625,601 | 69,465,823 (Indirect) |
View |
2023-04-18 Purchase |
2023-04-20 6:04 pm |
Ambrx Biopharma Inc. | AMAM | Cormorant Asset Management LP Chen Bihua Cormorant Global Healthcare Master Fund LP Cormorant Private Healthcare Fund III LP 10% Owner |
5,215,189 | $11.3 | $58,950,690 | 67,313,085 (Indirect) |
View |
2023-04-13 Purchase |
2023-04-17 5:46 pm |
Ambrx Biopharma Inc. | AMAM | Cormorant Asset Management LP Chen Bihua Cormorant Global Healthcare Master Fund LP Cormorant Private Healthcare Fund III LP 10% Owner |
2,597,896 | $9.7461 | $25,319,289 | 62,097,896 (Indirect) |
View |
2023-03-14 Purchase |
2023-03-16 6:04 pm |
Ambrx Biopharma Inc. | AMAM | Cormorant Asset Management LP Chen Bihua Cormorant Global Healthcare Master Fund LP Cormorant Private Healthcare Fund III LP 10% Owner |
1,000,000 | $10.21 | $10,211,400 | 53,500,000 (Indirect) |
View |
Stock options: Exercise, Award, Grant, Conversion
Transaction Date |
Reported DateTime |
Exercisable Expiration |
Company | Symnbol | Insider Relationship |
Shares Traded |
Conversion Price |
Shares Owned |
Filing |
2023-09-01 Option Award |
2023-09-06 5:52 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | DALESANDRO MARGARET Director |
195,833 | $0 | 70,833 (Direct) |
View |
2023-07-05 Option Award |
2023-07-07 4:06 pm |
N/A 2033-07-05 |
Ambrx Biopharma Inc. | AMAM | O'Connor Daniel J. President and CEO |
1,216,500 | $0 | 1,216,500 (Direct) |
View |
2023-07-05 Option Award |
2023-07-07 4:05 pm |
N/A 2033-07-05 |
Ambrx Biopharma Inc. | AMAM | Nelson Sonja Chief Financial Officer |
389,000 | $0 | 389,000 (Direct) |
View |
2023-07-05 Option Award |
2023-07-07 4:05 pm |
N/A 2033-07-05 |
Ambrx Biopharma Inc. | AMAM | Aromando Andrew Chief Operating Officer |
389,000 | $0 | 389,000 (Direct) |
View |
2023-06-07 Option Award |
2023-06-09 4:17 pm |
N/A 2033-06-07 |
Ambrx Biopharma Inc. | AMAM | Glover Stephen C. Director |
142,500 | $0 | 142,500 (Direct) |
View |
2023-06-07 Option Award |
2023-06-09 4:11 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Chang Xiaowei Director |
210,000 | $0 | 210,000 (Direct) |
View |
2023-06-07 Option Award |
2023-06-09 4:05 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Loesberg Janet Director |
85,000 | $0 | 85,000 (Direct) |
View |
2023-06-07 Option Award |
2023-06-09 4:05 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | MAIER PAUL V Director |
85,000 | $0 | 85,000 (Direct) |
View |
2023-06-07 Option Award |
2023-06-09 4:05 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Hermans Kate Director |
85,000 | $0 | 85,000 (Direct) |
View |
2023-05-18 Option Award |
2023-05-26 8:20 pm |
N/A 2033-05-18 |
Ambrx Biopharma Inc. | AMAM | Glover Stephen C. Director |
210,000 | $0 | 210,000 (Direct) |
View |
2023-04-28 Option Award |
2023-05-05 4:10 pm |
N/A 2033-04-28 |
Ambrx Biopharma Inc. | AMAM | Aromando Andrew Chief Operating Officer |
2,600,000 | $0 | 2,600,000 (Direct) |
View |
2023-04-26 Option Award |
2023-04-28 6:00 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Nelson Sonja Chief Fin. & Operating Officer |
1,000,000 | $0 | 1,000,000 (Direct) |
View |
2023-04-26 Option Award |
2023-04-28 5:59 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | O'Connor Daniel J. President and CEO |
2,750,000 | $0 | 2,750,000 (Direct) |
View |
Ownership |
2023-03-13 4:01 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Cormorant Asset Management LP Cormorant Global Healthcare Master Fund LP Cormorant Private Healthcare Fund III LP Chen Bihua 10% Owner |
0 | $0 | 52,500,000 (Indirect) |
View |
Ownership |
2023-03-08 10:50 am |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Darwin Global Management Ltd. 10% Owner |
0 | $0 | 53,091,423 (Indirect) |
View |
Ownership |
2023-03-03 4:05 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | COMMODORE CAPITAL LP 10% Owner |
0 | $0 | 35,700,000 (Indirect) |
View |
2023-01-27 Option Award |
2023-01-31 6:18 pm |
N/A 2031-04-29 |
Ambrx Biopharma Inc. | AMAM | Rupalla Katrin Director |
305,000 | $0 | 305,000 (Direct) |
View |
2023-01-27 Option Award |
2023-01-31 6:16 pm |
N/A 2031-09-01 |
Ambrx Biopharma Inc. | AMAM | Nelson Sonja Chief Fin. & Operating Officer |
3,849,596 | $0 | 3,849,596 (Direct) |
View |
2023-01-27 Option Award |
2023-01-31 6:14 pm |
N/A 2032-02-01 |
Ambrx Biopharma Inc. | AMAM | MAIER PAUL V Director |
315,000 | $0 | 315,000 (Direct) |
View |
2023-01-27 Option Award |
2023-01-31 6:09 pm |
N/A 2032-05-31 |
Ambrx Biopharma Inc. | AMAM | Loesberg Janet Director |
315,000 | $0 | 315,000 (Direct) |
View |
2023-01-27 Option Award |
2023-01-31 6:07 pm |
N/A 2032-06-29 |
Ambrx Biopharma Inc. | AMAM | Hermans Kate Director |
525,000 | $0 | 525,000 (Direct) |
View |
Ownership |
2023-01-09 6:34 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | WuXi AppTec Co. Ltd. WuXi PharmaTech Healthcare Fund I L.P. WuXi AppTec (Hong Kong) Holding Ltd 10% Owner |
0 | $0 | 29,267,687 (Indirect) |
View |
Ownership |
2023-01-03 6:43 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | HOPU Reunion Co Ltd 10% Owner |
0 | $0 | 38,952,409 (Direct) |
View |
Ownership |
2023-01-03 6:40 pm |
N/A 2031-04-29 |
Ambrx Biopharma Inc. | AMAM | Rupalla Katrin Director |
0 | $0 | 305,000 (Direct) |
View |
Ownership |
2023-01-03 6:35 pm |
N/A 2032-10-31 |
Ambrx Biopharma Inc. | AMAM | O'Connor Daniel J. President and CEO |
0 | $0 | 5,410,000 (Direct) |
View |
Ownership |
2023-01-03 6:32 pm |
N/A 2031-09-01 |
Ambrx Biopharma Inc. | AMAM | Nelson Sonja Chief Fin. & Operating Officer |
0 | $0 | 3,849,596 (Direct) |
View |
Ownership |
2023-01-03 6:30 pm |
N/A 2032-02-01 |
Ambrx Biopharma Inc. | AMAM | MAIER PAUL V Director |
0 | $0 | 315,000 (Direct) |
View |
Ownership |
2023-01-03 6:28 pm |
N/A 2032-05-31 |
Ambrx Biopharma Inc. | AMAM | Loesberg Janet Director |
0 | $0 | 315,000 (Direct) |
View |
Ownership |
2023-01-03 6:24 pm |
N/A N/A |
Ambrx Biopharma Inc. | AMAM | Hu Edward Director |
0 | $0 | 1,215,472 (Indirect) |
View |
Ownership |
2023-01-03 6:06 pm |
N/A 2032-06-29 |
Ambrx Biopharma Inc. | AMAM | Hermans Kate Director |
0 | $0 | 525,000 (Direct) |
View |