MACK

Merrimack Pharmaceuticals, Inc. Institutional Ownership

$6.92
*  
0.25
3.75%
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*Delayed - data as of May 24, 2016  -  Find a broker to begin trading MACK now
Exchange: NASDAQ
Industry: Health Care
Community Rating:
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Ownership Summary Institutional Holdings Insiders
(SEC Form 4)
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Ownership Summary as reported in the most recent 13F filings


Institutional Ownership 66.94%
Total Shares Outstanding (millions) 128
Total Value of Holdings (millions) $570

Active Positions

Holders Shares
Increased Positions 73 10,812,937
Decreased Positions 53 6,278,691
Held Positions 32 68,410,582
Total Institutional Shares 158 85,502,210

New and Sold Out Positions


Holders Shares
New Positions 21 7,947,830
Sold Out Positions 18 2,207,341

21 New Institutional Holders
7,947,830 New Total Shares Held


Click on the column header links to resort ascending (▲) or descending (▼).
Owner Name Date Shared Held Change (Shares) Change (%) Value (in 1,000s)
CONSONANCE CAPITAL MANAGEMENT LP 03/31/2016 5,875,171 5,875,171 New 39,187
NORGES BANK 12/31/2015 643,876 643,876 New 4,295
RENAISSANCE TECHNOLOGIES LLC 03/31/2016 636,613 636,613 New 4,246
POINTSTATE CAPITAL LP 03/31/2016 350,000 350,000 New 2,335
PORTOLAN CAPITAL MANAGEMENT, LLC 03/31/2016 227,051 227,051 New 1,514
CITADEL ADVISORS LLC 03/31/2016 114,748 114,748 New 765
KCG HOLDINGS, INC. 03/31/2016 29,296 29,296 New 195
TUDOR INVESTMENT CORP ET AL 03/31/2016 17,800 17,800 New 119
GSA CAPITAL PARTNERS LLP 03/31/2016 13,554 13,554 New 90
RAYMOND JAMES FINANCIAL SERVICES ADVISORS, INC. 03/31/2016 12,100 12,100 New 81
AMERIPRISE FINANCIAL INC 03/31/2016 10,833 10,833 New 72
TWO SIGMA ADVISERS, LP 03/31/2016 10,100 10,100 New 67
IPSWICH INVESTMENT MANAGEMENT CO., INC. 03/31/2016 2,000 2,000 New 13
NISA INVESTMENT ADVISORS L.L.C. 03/31/2016 1,700 1,700 New 11
QUADRANT CAPITAL GROUP LLC 03/31/2016 841 841 New 6

Institutional Holdings information for this company is filed by major institutions on form 13-F with the Securities and Exchange Commission.
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