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Actionable news in MACK: Merrimack Pharmaceuticals, Inc.,

Merrimack Pharmaceuticals, Inc. Institutional Ownership

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(SEC Form 4)

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Ownership Summary

Click on the column header links to resort ascending (▲) or descending (▼).

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Owner Name Date Shared Held Change (Shares) Change (%) Value (in 1,000s)
FMR LLC 06/30/2015 16,503,650 364,198 2.26 143,747
VANGUARD GROUP INC 06/30/2015 9,379,287 672,233 7.72 81,694
BLACKROCK FUND ADVISORS 06/30/2015 5,235,904 254,831 5.12 45,605
WESTFIELD CAPITAL MANAGEMENT CO LP 06/30/2015 4,881,667 1,978,108 68.13 42,519
STATE STREET CORP 06/30/2015 3,985,109 519,679 15.00 34,710
TIAA CREF INVESTMENT MANAGEMENT LLC 06/30/2015 3,103,320 525,906 20.40 27,030
BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A. 06/30/2015 2,322,152 (97,807) (4.04) 20,226
LAGODA INVESTMENT MANAGEMENT, L.P. 06/30/2015 2,100,140 168,268

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