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Merrimack Pharmaceuticals, Inc. (MACK)

NasdaqGM - NasdaqGM Real-time price. Currency in USD
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15.00-0.03 (-0.20%)
At close: 04:00PM EDT
15.00 0.00 (0.00%)
After hours: 06:09PM EDT
Insider roster
Insider transactions

Major holders

Currency in USD
Breakdown
1.21%% of shares held by all insiders
66.14%% of shares held by institutions
66.96%% of float held by institutions
96Number of institutions holding shares

Top institutional holders

HolderSharesDate reported% outValue
Western Standard, LLC2,172,51330 Dec 202314.95%32,587,695
Newtyn Management, Llc1,873,69430 Dec 202312.89%28,105,410
Blackrock Inc.743,62330 Dec 20235.12%11,154,345
Vanguard Group Inc608,95430 Dec 20234.19%9,134,310
Madison Avenue Partners, LP553,08530 Dec 20233.81%8,296,275
Adar1 Capital Management, LLC 549,41830 Dec 20233.78%8,241,270
Dimensional Fund Advisors LP435,64530 Dec 20233.00%6,534,675
Sepio Capital, LP306,68030 Dec 20232.11%4,600,200
Sio Capital Management, LLC288,46630 Dec 20231.99%4,326,990
Geode Capital Management, LLC259,94630 Dec 20231.79%3,899,190

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund318,12830 Dec 20232.19%4,771,920
Invesco ETF Tr II-Invesco DWA Small Cap Momentum ETF263,09830 Mar 20241.81%3,946,470
iShares Russell 2000 ETF253,91430 Mar 20241.75%3,808,710
Vanguard Extended Market Index Fund203,39830 Dec 20231.40%3,050,970
DFA U.S. Micro Cap Series145,15830 Jan 20241.00%2,177,370
DFA U.S. Small Cap Series108,25930 Jan 20240.74%1,623,885
Fidelity Small Cap Index Fund105,37428 Feb 20240.73%1,580,610
iShares Russell 2000 Growth ETF89,22630 Mar 20240.61%1,338,390
Fidelity Extended Market Index Fund79,16728 Feb 20240.54%1,187,505
Dimensional ETF Tr-Dimensional U.S. Targeted Value ETF58,60630 Jan 20240.40%879,090