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 |
| 2023-01-19 4:06 pm Sale | 2022-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | Millennium Management LLC | 146,541 3.700% | -2,687 (-1.80%) | Filing History |
| 2022-05-11 5:26 pm Unchanged | 2022-05-09 | 13D | Mersana Therapeutics, Inc. MRSN | Bain Capital Life Sciences Fund II, L.P. | 161,669 4.200% | 0 (Unchanged) | Filing History |
| 2022-04-14 4:56 pm Purchase | 2022-04-13 | 13D | Mersana Therapeutics, Inc. MRSN | Bain Capital Life Sciences Fund II, L.P. | 161,669 4.800% | 29,892 (+22.68%) | Filing History |
| 2022-02-17 4:12 pm Purchase | 2022-02-15 | 13G | Mersana Therapeutics, Inc. MRSN | Millennium Management LLC | 149,228 5.200% | 149,228 (New Position) | Filing History |
| 2022-02-11 2:34 pm Purchase | 2021-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | STATE STREET CORP STT | 168,822 5.870% | 168,822 (New Position) | Filing History |
| 2022-02-10 08:27 am Purchase | 2021-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | The Vanguard Group | 144,297 5.020% | 144,297 (New Position) | Filing History |
| 2022-02-08 5:02 pm Unchanged | 2022-02-07 | 13D | Mersana Therapeutics, Inc. MRSN | Bain Capital Life Sciences Fund II, L.P. | 131,777 4.400% | 0 (Unchanged) | Filing History |
| 2022-02-04 09:21 am Purchase | 2021-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | Wellington Management Group LLP | 200,683 6.980% | 14,560 (+7.82%) | Filing History |
| 2022-01-27 5:13 pm Unchanged | 2021-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | BlackRock Inc. BLK | 299,169 10.400% | 0 (Unchanged) | Filing History |
| 2022-01-26 09:17 am Sale | 2021-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | BlackRock Inc. BLK | 299,169 10.400% | -20,343 (-6.37%) | Filing History |
| 2022-01-03 5:10 pm Unchanged | 2021-12-29 | 13D | Mersana Therapeutics, Inc. MRSN | Bain Capital Life Sciences Fund II, L.P. | 131,777 4.500% | 0 (Unchanged) | Filing History |
| 2021-09-15 6:23 pm Purchase | 2021-09-10 | 13G | Mersana Therapeutics, Inc. MRSN | BB BIOTECH AG | 165,400 5.800% | 165,400 (New Position) | Filing History |
| 2021-02-12 4:17 pm Sale | 2020-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | PFIZER INC PFE | 0 0.000% | -88,385 (Position Closed) | Filing History |
| 2021-02-12 08:04 am Purchase | 2020-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | Avoro Capital Advisors LLC | 272,000 9.900% | 272,000 (New Position) | Filing History |
| 2021-02-11 5:08 pm Sale | 2020-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | BIOTECHNOLOGY VALUE FUND L P | 0 0.000% | -150,222 (Position Closed) | Filing History |
| 2021-02-04 09:51 am Purchase | 2020-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | Wellington Management Group LLP | 186,123 6.790% | 147,447 (+381.23%) | Filing History |