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IMMUNOGEN INC
IMMUNOGEN INC. Institutional holdings reported to the SEC.

Institutional Holders (2014Q4)
Portfolio Summary: 144 Institutional holders with a total value of $428,135,268.
#
Manager Name
Shares
Value ($)
%
Options
Notes
51 CITIGROUP INC 99,634 608,000 0.14%
52 SMITH ASSET MANAGEMENT GROUP LP 97,860 597,000 0.14%
53 Swiss National Bank 96,200 587,000 0.14%
54 NATIXIS ADVISORS, LLC 92,187 562,000 0.13%
55 PLATINUM INVESTMENT MANAGEMENT LTD 90,600 552,000 0.13%
56 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 89,515 546,000 0.13%
57 RHUMBLINE ADVISERS 79,897 487,000 0.11%
58 SUSQUEHANNA INTERNATIONAL GROUP, LLP 78,500 479,000 0.11% Call
59 UBS Group AG 77,500 473,000 0.11% Call
60 ProShare Advisors LLC 75,337 460,000 0.11%
61 D.A. DAVIDSON & CO. 74,970 456,000 0.11%
62 Jefferies Group LLC 74,500 454,000 0.11% Call
63 PARAMETRIC PORTFOLIO ASSOCIATES LLC 72,847 444,000 0.10%
64 BlackRock Group LTD 71,669 437,000 0.10%
65 METROPOLITAN LIFE INSURANCE CO/NY 69,402 423,000 0.10%
66 GOLDMAN SACHS GROUP INC 65,800 401,000 0.09% Put
67 Nationwide Fund Advisors 65,685 401,000 0.09%
68 AMERICAN INTERNATIONAL GROUP, INC. 61,633 375,961 0.09%
69 UBS Group AG 55,884 341,000 0.08%
70 TFS CAPITAL LLC 55,089 336,000 0.08%
71 MANUFACTURERS LIFE INSURANCE COMPANY, THE 54,990 335,000 0.08%
72 PRUDENTIAL FINANCIAL INC 54,132 330,000 0.08%
73 VOYA INVESTMENT MANAGEMENT LLC 47,705 291,000 0.07%
74 BLACKROCK ADVISORS LLC 47,312 289,000 0.07%
75 DekaBank Deutsche Girozentrale 46,200 278,000 0.06%
76 Nine Chapters Capital Management LLC 42,300 258,000 0.06%
77 LANDSCAPE CAPITAL MANAGEMENT, L.L.C. 38,500 235,000 0.05%
78 Placemark Investments, Inc. 36,883 225,000 0.05%
79 NOMURA HOLDINGS INC 33,301 221,000 0.05%
80 MILLENNIUM MANAGEMENT LLC 35,800 218,000 0.05% Call
81 BLUE ARROW CAPITAL MANAGEMENT LLC 34,095 208,000 0.05%
82 PRICE T ROWE ASSOCIATES INC /MD/ 33,413 204,000 0.05%
83 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 31,097 190,000 0.04%
84 GROUP ONE TRADING LLC 30,796 188,000 0.04%
85 ROYAL BANK OF CANADA 28,470 174,000 0.04%
86 BANK OF AMERICA CORP /DE/ 27,923 171,000 0.04%
87 COMERICA BANK 27,242 166,000 0.04%
88 Neuberger Berman Group LLC 24,938 152,000 0.04%
89 AQR CAPITAL MANAGEMENT LLC 23,000 140,000 0.03%
90 Virtu KCG Holdings LLC 21,007 128,000 0.03%
91 SG Americas Securities, LLC 20,199 123,000 0.03%
92 Tower Research Capital LLC (TRC) 18,669 114,000 0.03%
93 FRONT BARNETT ASSOCIATES LLC 18,190 111,000 0.03%
94 BLAIR WILLIAM & CO/IL 17,571 106,000 0.02%
95 RELIANCE TRUST CO OF DELAWARE 16,900 103,000 0.02%
96 PRINCIPAL FINANCIAL GROUP INC 15,975 97,000 0.02%
97 PRELUDE CAPITAL MANAGEMENT, LLC 14,500 88,000 0.02%
98 CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC. 14,500 88,000 0.02%
99 M&T BANK CORP 14,006 86,000 0.02%
100 Creative Planning 14,155 86,000 0.02%
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From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.