Activist 13D/13G Filings - MERRIMACK PHARMACEUTICALS INC (MACK)

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
2024-03-07
12:29 pm
Sale
13GMERRIMACK PHARMACEUTICALS INC
MACK
BlackRock Inc.
BLK
715,279
4.990%
-28,344decrease
(-3.81%)
View
2024-02-14
4:20 pm
Sale
13GMERRIMACK PHARMACEUTICALS INC
MACK
22NW Fund LP0
0.000%
-1,015,048decrease
(Position Closed)
View
2024-01-31
2:08 pm
Purchase
13GMERRIMACK PHARMACEUTICALS INC
MACK
BlackRock Inc.
BLK
743,623
5.200%
491,029increase
(+194.39%)
View
2024-01-25
4:05 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Newtyn Management LLC1,873,694
13.100%
354,587increase
(+23.34%)
View
2023-12-13
4:05 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Western Standard LLC2,220,058
15.500%
228,950increase
(+11.50%)
View
2023-08-14
4:05 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Western Standard LLC1,991,108
13.900%
802,263increase
(+67.48%)
View
2023-02-14
4:04 pm
Sale
13GMERRIMACK PHARMACEUTICALS INC
MACK
Point72 Asset Management L.P.0
0.000%
-900,981decrease
(Position Closed)
View
2023-02-13
4:20 pm
Purchase
13GMERRIMACK PHARMACEUTICALS INC
MACK
22NW Fund LP1,015,048
7.600%
1,015,048increase
(New Position)
View
2022-08-04
4:28 pm
Purchase
13GMERRIMACK PHARMACEUTICALS INC
MACK
Point72 Asset Management L.P.900,981
6.700%
900,981increase
(New Position)
View
2022-02-14
12:50 pm
Unchanged
13GMERRIMACK PHARMACEUTICALS INC
MACK
22NW LP1,241,896
9.300%
0
(Unchanged)
View
2022-02-14
08:19 am
Sale
13GMERRIMACK PHARMACEUTICALS INC
MACK
Nantahala Capital Management LLC569,971
4.300%
-181,872decrease
(-24.19%)
View
2021-02-12
5:13 pm
Sale
13GMERRIMACK PHARMACEUTICALS INC
MACK
DIMENSIONAL FUND ADVISORS LP550,539
4.100%
-122,591decrease
(-18.21%)
View
2021-02-12
4:01 pm
Purchase
13GMERRIMACK PHARMACEUTICALS INC
MACK
22NW LP1,241,896
9.280%
492,594increase
(+65.74%)
View
2021-02-12
06:46 am
Purchase
13GMERRIMACK PHARMACEUTICALS INC
MACK
Nantahala Capital Management LLC751,843
5.600%
4,208increase
(+0.56%)
View
2020-12-02
7:21 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Western Standard LLC1,188,845
8.900%
142,217increase
(+13.59%)
View
2020-12-02
2:18 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Newtyn Management LLC1,519,107
11.400%
142,227increase
(+10.33%)
View
2020-07-24
5:42 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Newtyn Management LLC1,376,880
10.300%
203,714increase
(+17.36%)
View
2020-07-23
8:44 pm
Purchase
13DMERRIMACK PHARMACEUTICALS INC
MACK
Western Standard LLC1,046,628
7.800%
203,715increase
(+24.17%)
View
2020-02-14
3:17 pm
Sale
13GMERRIMACK PHARMACEUTICALS INC
MACK
BIOTECHNOLOGY VALUE FUND L P0
0.000%
-721,935decrease
(Position Closed)
View
2020-02-14
12:23 pm
Purchase
13GMERRIMACK PHARMACEUTICALS INC
MACK
Nantahala Capital Management LLC747,635
5.600%
747,635increase
(New Position)
View
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