Merrimack Pharmaceuticals, Inc.
Hedge Funds Holdings

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Merrimack Pharmaceuticals, Inc.‘s stocks are currently a part of 29 hedge funds’ portfolios, which represents 16.56% of the total amount of its stocks outstanding. This makes up a total of 2.24M shares of Merrimack Pharmaceuticals, Inc.. Compared to the previous quarter, the number fell by -70.35% or -5.31M shares fewer. As for the holding position changes, 20.69% (6) of current hedge fund investors increased the number of shares held, 13.79% (4) of current holders sold a part of the shares held, and 6.9% (2) closed the holdings completely. 5 hedge funds are new holders of Merrimack Pharmaceuticals, Inc. stock in Q1 2023, it is 17.24% of total holders.

Hedge funds holding Merrimack Pharmaceuticals (Q2 2018 – Q1 2023)

Number of hedge funds
Q2 2018 67
Q3 2018 59
Q4 2018 51
Q1 2019 49
Q2 2019 45
Q3 2019 41
Q4 2019 41
Q1 2020 32
Q2 2020 32
Q3 2020 32
Q4 2020 36
Q1 2021 44
Q2 2021 42
Q3 2021 36
Q4 2021 36
Q1 2022 39
Q2 2022 39
Q3 2022 38
Q4 2022 46
Q1 2023 29

Hedge funds changes in Merrimack Pharmaceuticals positions (Q2 2018 – Q1 2023)

Changes in positions
Q2 2018 14211921-8
Q3 2018 51720125
Q4 2018 8122116-6
Q1 2019 6111787
Q2 2019 4111479
Q3 2019 46318-8
Q4 2019 5613512
Q1 2020 1213106
Q2 2020 438413
Q3 2020 386312
Q4 2020 759312
Q1 2021 9156113
Q2 2021 571776
Q3 2021 1412712
Q4 2021 4311414
Q1 2022 4810116
Q2 2022 21010215
Q3 2022 3514412
Q4 2022 1315954
Q1 2023 564212

Hedge funds changes in Merrimack Pharmaceuticals stock options (Q2 2018 – Q1 2023)

Changes in stock options
Q2 2018 1,631,000 352,000
Q3 2018 195,000 233,000
Q4 2018 0 23,000
Q1 2019 110,000 49,000
Q2 2019 232,000 0
Q3 2019 214,000 114,000
Q4 2019 160,000 214,000
Q1 2020 58,000 55,000
Q2 2020 367,000 0
Q3 2020 801,000 281,000
Q4 2020 3,311,000 474,000
Q1 2021 669,000 991,000
Q2 2021 38,000 317,000
Q3 2021 215,000 839,000
Q4 2021 180,000 990,000
Q1 2022 276,000 1,103,000
Q2 2022 117,000 283,000
Q3 2022 203,000 135,000
Q4 2022 6,491,574 3,634,628
Q1 2023 1,315,834,000 33,013,000

Top 50 hedge fund holders of Merrimack Pharmaceuticals, Inc. (NASDAQ:MACK)

Hedge fund Value Shares owned Portfolio share
NEWTYN MANAGEMENT, LLC 6.62M 1.76M 1.455%
22NW, LP 4.61M 1.23M 2.611%
WESTERN STANDARD LLC 4.39M 1.17M 5.029%
POINT72 ASSET MANAGEMENT, L.P. Steven Cohen 4.12M 1.10M 0.017%
VANGUARD GROUP INC 2.28M 607.80K 0.000%
DIMENSIONAL FUND ADVISORS LP 1.77M 472.30K 0.001%
NANTAHALA CAPITAL MANAGEMENT, LLC 1.61M 429.59K 0.104%
SEPIO CAPITAL, LP 1.10M 294.54K 0.110%
BLACKROCK INC. Larry Fink 775K 206.78K 0.000%
WITTENBERG INVESTMENT MANAGEMENT, INC. 708K 188.69K 0.301%
YAKIRA CAPITAL MANAGEMENT, INC. 434K 115.82K 0.063%
GEODE CAPITAL MANAGEMENT, LLC 378K 100.80K 0.000%
STATE STREET CORP 175K 46.55K 0.000%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 156K 41.61K 0.000%
BANK OF NEW YORK MELLON CORP 153K 40.95K 0.000%
BRIDGEWAY CAPITAL MANAGEMENT, LLC 128K 34.2K 0.003%
NORTHERN TRUST CORP 90K 23.98K 0.000%
TWO SIGMA INVESTMENTS, LP John Overdeck 81K 21.51K 0.000%
CITADEL ADVISORS LLC Ken Griffin 77K 20.4K 0.000%
BELVEDERE TRADING LLC 77K 20.05K 0.003%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 77K 20.4K 0.000%
BELVEDERE TRADING LLC 71K 18.6K 0.002%
TWO SIGMA ADVISERS, LP 70K 18.68K 0.000%
BROWN ADVISORY INC 56K 15.02K 0.000%
CITADEL ADVISORS LLC Ken Griffin 51K 13.71K 0.000%
SIMPLEX TRADING, LLC 48K 12.9K 0.000%
GROUP ONE TRADING, L.P. 45K 11.93K 0.000%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 42K 11.2K 0.000%
SIMPLEX TRADING, LLC 32K 8.69K 0.000%
MORGAN STANLEY 25K 6.51K 0.000%
SIMPLEX TRADING, LLC 22K 5.9K 0.000%
MASCOMA WEALTH MANAGEMENT LLC 19K 5K 0.007%
UBS GROUP AG 19K 5.09K 0.000%
ROYAL BANK OF CANADA 13K 3.5K 0.000%
WEBSTER BANK, N. A. 11K 3.05K 0.002%
BANK OF AMERICA CORP /DE/ 6K 1.53K 0.000%
BALDWIN BROTHERS LLC/MA 2K 500 0.000%
FEDERATED HERMES, INC. 1K 91 0.000%
SANDY SPRING BANK 1K 300 0.000%
TOWER RESEARCH CAPITAL LLC (TRC) 1K 185 0.000%
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 1K 300 0.000%
TSFG, LLC 1K 160 0.001%
GROUP ONE TRADING, L.P. 1K 200 0.000%
WELLS FARGO & COMPANY/MN 1K 150 0.000%
RISE ADVISORS, LLC 1K 272 0.001%
BRONTE CAPITAL MANAGEMENT PTY LTD. 0 0 0.000%
GROUP ONE TRADING, L.P. 0 0 0.000%
CUBIST SYSTEMATIC STRATEGIES, LLC 0 0 0.000%
LEJEUNE PUETZ INVESTMENT COUNSEL LLC 0 0 0.000%
GOLDMAN SACHS GROUP INC 0 0 0.000%