Merrimack Pharmaceuticals Inc (MACK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Western Standard, Llc	2,172,513	$29,133,399	19.39%
2.	Blackrock Inc.	743,623	$9,971,985	0%
3.	Vanguard Group Inc	608,954	$8,166,073	0%
4.	Dimensional Fund Advisors Lp	435,645	$5,842,000	0%
5.	Sepio Capital, Llc	306,680	$4,112,579	0.34%