Activist 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 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
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Time period
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Reported
DateTime
TypeCompany
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev ReportFiling
2024-05-17
08:26 am
Purchase
13GMersana Therapeutics Inc.
MRSN
Nextech Crossover I GP S.a r.l.6,248,843
5.1%
6,248,843increase
(New Position)
View
2024-02-14
8:56 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
Venrock Healthcare Capital Partners III L.P.11,328,000
9.4%
1,650,000increase
(+17.05%)
View
2024-02-14
8:43 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
SILVERARC CAPITAL MANAGEMENT LLC6,420,136
5.3%
6,420,136increase
(New Position)
View
2024-02-14
6:55 pm
Sale
13GMersana Therapeutics Inc.
MRSN
ORBIMED ADVISORS LLC0
0%
-7,082,837decrease
(Position Closed)
View
2024-02-14
09:20 am
Sale
13GMersana Therapeutics Inc.
MRSN
Avoro Capital Advisors LLC0
0%
-7,550,000decrease
(Position Closed)
View
2024-02-14
07:22 am
Purchase
13GMersana Therapeutics Inc.
MRSN
Balyasny Asset Management L.P.9,698,147
8.04%
9,698,147increase
(New Position)
View
2024-02-13
5:09 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
VANGUARD GROUP INC6,237,588
5.17%
1,788,548increase
(+40.20%)
View
2024-01-29
3:26 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
BlackRock Inc.
BLK
7,844,282
6.5%
352,353increase
(+4.70%)
View
2024-01-22
1:36 pm
Sale
13GMersana Therapeutics Inc.
MRSN
STATE STREET CORP
STT
2,329,434
1.93%
-3,526,627decrease
(-60.22%)
View
2023-08-07
4:15 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
Venrock Healthcare Capital Partners III L.P.9,678,000
8.5%
9,678,000increase
(New Position)
View
2023-07-27
5:11 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
EcoR1 Capital LLC19,364,688
16.9%
19,364,688increase
(New Position)
View
2023-02-14
4:43 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
ORBIMED ADVISORS LLC7,082,837
7.1%
7,082,837increase
(New Position)
View
2023-02-14
4:18 pm
Sale
13GMersana Therapeutics Inc.
MRSN
BB BIOTECH AG4,066,200
4.1%
-68,800decrease
(-1.66%)
View
2023-02-14
09:38 am
Purchase
13GMersana Therapeutics Inc.
MRSN
Avoro Capital Advisors LLC7,550,000
7.6%
750,000increase
(+11.03%)
View
2023-02-13
6:04 pm
Sale
13GMersana Therapeutics Inc.
MRSN
Rho Ventures V L.P.604,213
0.6%
-726,974decrease
(-54.61%)
View
2023-02-09
11:27 am
Purchase
13GMersana Therapeutics Inc.
MRSN
VANGUARD GROUP INC4,449,040
4.46%
841,609increase
(+23.33%)
View
2023-02-06
2:53 pm
Sale
13GMersana Therapeutics Inc.
MRSN
WELLINGTON MANAGEMENT GROUP LLP0
0%
-5,017,078decrease
(Position Closed)
View
2023-02-03
12:27 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
STATE STREET CORP
STT
5,856,061
5.87%
1,635,504increase
(+38.75%)
View
2023-01-31
1:58 pm
Purchase
13GMersana Therapeutics Inc.
MRSN
BlackRock Inc.
BLK
7,491,929
7.5%
12,700increase
(+0.17%)
View
2023-01-19
4:06 pm
Sale
13GMersana Therapeutics Inc.
MRSN
MILLENNIUM MANAGEMENT LLC3,663,527
3.7%
-67,184decrease
(-1.80%)
View
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