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
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- Peter Lynch
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| 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 | Mersana Therapeutics, Inc. MRSN |
BLACKROCK INC BLK |
8,323,869 6.700% |
-881,313 (-9.57%) |
Filing History |
| 2025-02-14 6:15 pm Sale |
2024-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
Venrock Healthcare Capital Partners III L.P. | 10,257,790 8.300% |
-1,070,210 (-9.45%) |
Filing History |
| 2025-02-05 1:23 pm Purchase |
2024-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
BLACKROCK INC BLK |
9,205,182 8.000% |
1,360,900 (+17.35%) |
Filing History |
| 2024-12-26 4:29 pm Unchanged |
2024-12-20 | 13G | Mersana Therapeutics, Inc. MRSN |
Nextech Crossover I GP S.a r.l. | 12,067,246 10.400% |
0 (Unchanged) |
Filing History |
| 2024-12-23 7:50 pm Sale |
2024-12-19 | 13G | Mersana Therapeutics, Inc. MRSN |
EcoR1 Capital LLC | 11,578,447 9.990% |
-7,786,241 (-40.21%) |
Filing History |
| 2024-11-15 4:45 pm Purchase |
2024-11-13 | 13D | Mersana Therapeutics, Inc. MRSN |
Bain Capital Life Sciences Fund II, L.P. | 4,968,006 4.000% |
926,273 (+22.92%) |
Filing History |
| 2024-11-14 5:45 pm Purchase |
2024-09-30 | 13G | Mersana Therapeutics, Inc. MRSN |
Nextech Crossover I GP S.a r.l. | 12,067,246 9.800% |
5,818,403 (+93.11%) |
Filing History |
| 2024-11-14 06:01 am Sale |
2024-09-30 | 13G | Mersana Therapeutics, Inc. MRSN |
BALYASNY ASSET MANAGEMENT LLC | 535,819 0.440% |
-9,162,328 (-94.48%) |
Filing History |
| 2024-10-15 06:55 am Sale |
2024-10-11 | 13G | Mersana Therapeutics, Inc. MRSN |
SILVERARC CAPITAL MANAGEMENT LLC | 1,754,086 1.430% |
-4,666,050 (-72.68%) |
Filing History |
| 2024-05-17 08:26 am Purchase |
2024-05-14 | 13G | Mersana Therapeutics, Inc. MRSN |
Nextech Crossover I GP S.a r.l. | 6,248,843 5.100% |
6,248,843 (New Position) |
Filing History |
| 2024-02-14 8:56 pm Purchase |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
Venrock Healthcare Capital Partners III L.P. | 11,328,000 9.400% |
1,650,000 (+17.05%) |
Filing History |
| 2024-02-14 8:43 pm Purchase |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
SILVERARC CAPITAL MANAGEMENT LLC | 6,420,136 5.300% |
6,420,136 (New Position) |
Filing History |
| 2024-02-14 6:55 pm Sale |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
ORBIMED ADVISORS LLC | 0 0.000% |
-7,082,837 (Position Closed) |
Filing History |
| 2024-02-14 09:20 am Sale |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
AVORO CAPITAL ADVISORS LLC | 0 0.000% |
-7,550,000 (Position Closed) |
Filing History |
| 2024-02-14 07:22 am Purchase |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
BALYASNY ASSET MANAGEMENT LLC | 9,698,147 8.040% |
9,698,147 (New Position) |
Filing History |
| 2024-02-13 5:09 pm Purchase |
2023-12-29 | 13G | Mersana Therapeutics, Inc. MRSN |
The Vanguard Group | 6,237,588 5.170% |
1,788,548 (+40.20%) |
Filing History |
| 2024-01-29 3:26 pm Purchase |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
BLACKROCK INC BLK |
7,844,282 6.500% |
352,353 (+4.70%) |
Filing History |
| 2024-01-22 1:36 pm Sale |
2023-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
STATE STREET CORP STT |
2,329,434 1.930% |
-3,526,627 (-60.22%) |
Filing History |
| 2023-08-07 4:15 pm Purchase |
2023-07-28 | 13G | Mersana Therapeutics, Inc. MRSN |
Venrock Healthcare Capital Partners III L.P. | 9,678,000 8.500% |
9,678,000 (New Position) |
Filing History |
| 2023-07-27 5:11 pm Purchase |
2023-07-27 | 13G | Mersana Therapeutics, Inc. MRSN |
EcoR1 Capital LLC | 19,364,688 16.900% |
19,364,688 (New Position) |
Filing History |