13D/13G Filings - Mersana Therapeutics Inc. (MRSN)

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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Reported
DateTime
Transaction
Date
Type Company
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev Report View
2023-02-14
4:43 pm
Purchase
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
ORBIMED ADVISORS LLC 7,082,837
7.100%
7,082,837increase
(New Position)
Filing
History
2023-02-14
4:18 pm
Sale
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
BB Biotech AG 4,066,200
4.100%
-68,800decrease
(-1.66%)
Filing
History
2023-02-14
09:38 am
Purchase
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
AVORO CAPITAL ADVISORS LLC 7,550,000
7.600%
750,000increase
(+11.03%)
Filing
History
2023-02-13
6:04 pm
Sale
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
Rho Ventures V L.P. 604,213
0.600%
-726,974decrease
(-54.61%)
Filing
History
2023-02-09
11:27 am
Purchase
2022-12-30 13G Mersana Therapeutics, Inc.
MRSN
The Vanguard Group 4,449,040
4.460%
841,609increase
(+23.33%)
Filing
History
2023-02-06
2:53 pm
Sale
2022-12-30 13G Mersana Therapeutics, Inc.
MRSN
Wellington Management Group LLP 0
0.000%
-5,017,078decrease
(Position Closed)
Filing
History
2023-02-03
12:27 pm
Purchase
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
STATE STREET CORP
STT
5,856,061
5.870%
1,635,504increase
(+38.75%)
Filing
History
2023-01-31
1:58 pm
Purchase
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
BlackRock Inc.
BLK
7,491,929
7.500%
12,700increase
(+0.17%)
Filing
History
2023-01-19
4:06 pm
Sale
2022-12-31 13G Mersana Therapeutics, Inc.
MRSN
Integrated Core Strategies (US) LLC 3,663,527
3.700%
-67,184decrease
(-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. 4,041,733
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. 4,041,733
4.800%
747,310increase
(+22.68%)
Filing
History
2022-02-17
4:12 pm
Purchase
2022-02-15 13G Mersana Therapeutics, Inc.
MRSN
Integrated Core Strategies (US) LLC 3,730,711
5.200%
3,730,711increase
(New Position)
Filing
History
2022-02-11
2:34 pm
Purchase
2021-12-31 13G Mersana Therapeutics, Inc.
MRSN
STATE STREET CORP
STT
4,220,557
5.870%
4,220,557increase
(New Position)
Filing
History
2022-02-10
08:27 am
Purchase
2021-12-31 13G Mersana Therapeutics, Inc.
MRSN
The Vanguard Group 3,607,431
5.020%
3,607,431increase
(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. 3,294,423
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 5,017,078
6.980%
364,012increase
(+7.82%)
Filing
History
2022-01-27
5:13 pm
Unchanged
2021-12-31 13G Mersana Therapeutics, Inc.
MRSN
BlackRock Inc.
BLK
7,479,229
10.400%
0
(Unchanged)
Filing
History
2022-01-26
09:17 am
Sale
2021-12-31 13G Mersana Therapeutics, Inc.
MRSN
BlackRock Inc.
BLK
7,479,229
10.400%
-508,583decrease
(-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. 3,294,423
4.500%
0
(Unchanged)
Filing
History
2021-09-15
6:23 pm
Purchase
2021-09-10 13G Mersana Therapeutics, Inc.
MRSN
BB Biotech AG 4,135,000
5.800%
4,135,000increase
(New Position)
Filing
History
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