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Merrimack Pharmaceuticals, Inc. (MACK)

NasdaqGM - NasdaqGM Real-time price. Currency in USD
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15.130.00 (0.00%)
At close: 04:00PM EDT
Insider roster
Insider transactions

Major holders

Currency in USD
Breakdown
1.19%% of shares held by all insiders
62.98%% of shares held by institutions
63.74%% of float held by institutions
101Number of institutions holding shares

Top institutional holders

HolderSharesDate reported% outValue
Western Standard, LLC2,172,51330 Mar 202414.69%32,870,121
Newtyn Management, Llc1,873,69430 Mar 202412.67%28,348,990
Adar1 Capital Management, LLC 902,35030 Mar 20246.10%13,652,555
Blackrock Inc.723,29430 Mar 20244.89%10,943,438
Vanguard Group Inc620,84730 Mar 20244.20%9,393,415
Dimensional Fund Advisors LP398,00130 Mar 20242.69%6,021,755
Madison Avenue Partners, LP387,22130 Mar 20242.62%5,858,653
Sepio Capital, LP298,54530 Mar 20242.02%4,516,985
Invesco Ltd.277,12430 Mar 20241.87%4,192,886
Geode Capital Management, LLC272,01530 Mar 20241.84%4,115,586

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund318,12830 Dec 20232.15%4,813,276
Invesco ETF Tr II-Invesco DWA Small Cap Momentum ETF263,09830 Mar 20241.78%3,980,672
iShares Russell 2000 ETF253,91430 Mar 20241.72%3,841,718
Vanguard Extended Market Index Fund203,39830 Dec 20231.38%3,077,411
DFA U.S. Micro Cap Series145,15830 Jan 20240.98%2,196,240
DFA U.S. Small Cap Series108,25930 Jan 20240.73%1,637,958
Fidelity Small Cap Index Fund105,37428 Feb 20240.71%1,594,308
iShares Russell 2000 Growth ETF89,22630 Mar 20240.60%1,349,989
Fidelity Extended Market Index Fund83,81530 Mar 20240.57%1,268,120
Dimensional ETF Tr-Dimensional U.S. Targeted Value ETF58,60630 Jan 20240.40%886,708