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Merrimack Pharmaceuticals, Inc. (MACK)

NasdaqGM - NasdaqGM Real-time price. Currency in USD
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14.71-0.02 (-0.14%)
At close: 04:00PM EDT
14.71 0.00 (0.00%)
After hours: 04:01PM EDT
Insider roster
Insider transactions

Major holders

Currency in USD
Breakdown
1.21%% of shares held by all insiders
66.58%% of shares held by institutions
67.40%% of float held by institutions
96Number of institutions holding shares

Top institutional holders

HolderSharesDate reported% outValue
Western Standard, LLC2,172,51330 Dec 202314.95%31,957,666
Newtyn Management, Llc1,873,69430 Dec 202312.89%27,562,038
Blackrock Inc.743,62330 Dec 20235.12%10,938,694
Vanguard Group Inc608,95430 Dec 20234.19%8,957,713
Madison Avenue Partners, LP553,08530 Dec 20233.81%8,135,880
Adar1 Capital Management, LLC 549,41830 Dec 20233.78%8,081,938
Dimensional Fund Advisors LP435,64530 Dec 20233.00%6,408,337
Sepio Capital, LP306,68030 Dec 20232.11%4,511,262
Sio Capital Management, LLC288,46630 Dec 20231.99%4,243,334
Geode Capital Management, LLC259,94630 Dec 20231.79%3,823,805

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund318,12830 Dec 20232.19%4,679,662
iShares Russell 2000 ETF249,73228 Feb 20241.72%3,673,557
Vanguard Extended Market Index Fund203,39830 Dec 20231.40%2,991,984
DFA U.S. Micro Cap Series145,15830 Jan 20241.00%2,135,274
DFA U.S. Small Cap Series108,25930 Jan 20240.74%1,592,489
Fidelity Small Cap Index Fund103,17030 Jan 20240.71%1,517,630
iShares Russell 2000 Growth ETF89,22628 Feb 20240.61%1,312,514
Fidelity Extended Market Index Fund79,16728 Feb 20240.54%1,164,546
Dimensional ETF Tr-Dimensional U.S. Targeted Value ETF58,60630 Jan 20240.40%862,094
DFA U.S. Core Equity 2 Portfolio34,77430 Jan 20240.24%511,525