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Merrimack Pharmaceuticals, Inc. (MACK)

NasdaqGM - NasdaqGM Real-time price. Currency in USD
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14.75+0.03 (+0.20%)
At close: 04:00PM EDT
14.84 +0.09 (+0.61%)
After hours: 06:02PM EDT

Major holders

Currency in USD
Breakdown
1.21%% of shares held by all insiders
66.68%% of shares held by institutions
67.50%% of float held by institutions
96Number of institutions holding shares

Top institutional holders

HolderSharesDate reported% outValue
Western Standard, LLC2,172,51330 Dec 202314.95%32,044,566
Newtyn Management, Llc1,873,69430 Dec 202312.89%27,636,986
Blackrock Inc.743,62330 Dec 20235.12%10,968,439
Vanguard Group Inc608,95430 Dec 20234.19%8,982,071
Madison Avenue Partners, LP553,08530 Dec 20233.81%8,158,003
Adar1 Capital Management, LLC 549,41830 Dec 20233.78%8,103,915
Dimensional Fund Advisors LP435,64530 Dec 20233.00%6,425,763
Sepio Capital, LP306,68030 Dec 20232.11%4,523,530
Sio Capital Management, LLC288,46630 Dec 20231.99%4,254,873
Geode Capital Management, LLC259,94630 Dec 20231.79%3,834,203

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund318,12830 Dec 20232.19%4,692,388
iShares Russell 2000 ETF255,18530 Jan 20241.76%3,763,978
Vanguard Extended Market Index Fund203,39830 Dec 20231.40%3,000,120
DFA U.S. Micro Cap Series148,84930 Oct 20231.02%2,195,522
DFA U.S. Small Cap Series110,93230 Oct 20230.76%1,636,247
Fidelity Small Cap Index Fund101,39330 Dec 20230.70%1,495,546
iShares Russell 2000 Growth ETF88,60230 Jan 20240.61%1,306,879
Fidelity Extended Market Index Fund79,55130 Jan 20240.55%1,173,377
Dimensional ETF Tr-Dimensional U.S. Targeted Value ETF68,11830 Oct 20230.47%1,004,740
DFA U.S. Core Equity 2 Portfolio34,77430 Oct 20230.24%512,916