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IMMUNOGEN INCORPORATED
IMMUNOGEN INCORPORATED. 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
1 PRIMECAP MANAGEMENT CO/CA/ 12,127,073 73,975,000 17.28%
2 Clearbridge Investments, LLC 11,436,364 69,762,000 16.29%
3 FMR LLC 9,416,641 57,442,000 13.42%
4 VANGUARD GROUP INC 5,310,180 32,392,000 7.57%
5 BB BIOTECH AG 3,240,816 19,769,000 4.62%
6 BlackRock Fund Advisors 3,180,214 19,399,000 4.53%
7 STATE STREET CORP 3,141,312 19,162,000 4.48%
8 BlackRock Institutional Trust Company, N.A. 2,424,673 14,791,000 3.45%
9 MILLENNIUM MANAGEMENT LLC 1,489,435 9,086,000 2.12%
10 NORGES BANK 1,481,153 9,035,000 2.11%
11 Artal Group S.A. 1,000,000 6,100,000 1.42% Call
12 MORGAN STANLEY 998,544 6,091,000 1.42%
13 WELLS FARGO & COMPANY/MN 971,606 5,927,000 1.38%
14 NORTHERN TRUST CORP 968,261 5,906,000 1.38%
15 BOGLE INVESTMENT MANAGEMENT L P /DE/ 771,842 4,708,000 1.10%
16 D. E. Shaw & Co., Inc. 625,169 3,814,000 0.89%
17 DEUTSCHE BANK AG\ 540,521 3,296,000 0.77%
18 MANAGED ACCOUNT ADVISORS LLC 535,536 3,266,000 0.76%
19 GEODE CAPITAL MANAGEMENT, LLC 533,652 3,254,000 0.76%
20 Candriam S.C.A. 485,000 2,959,000 0.69%
21 Bank of New York Mellon Corp 473,890 2,891,000 0.68%
22 SUSQUEHANNA INTERNATIONAL GROUP, LLP 458,276 2,795,000 0.65%
23 RAYMOND JAMES & ASSOCIATES 413,978 2,525,000 0.59%
24 Granahan Investment Management, LLC 413,800 2,524,000 0.59%
25 Numeric Investors LLC 306,189 1,868,000 0.44%
26 TIAA CREF INVESTMENT MANAGEMENT LLC 305,215 1,862,000 0.43%
27 GUGGENHEIM CAPITAL LLC 301,045 1,836,000 0.43%
28 MILLENNIUM MANAGEMENT LLC 300,000 1,830,000 0.43% Put
29 MACQUARIE GROUP LTD 290,000 1,769,000 0.41%
30 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 261,655 1,597,000 0.37%
31 MARINER INVESTMENT GROUP LLC 258,000 1,574,000 0.37%
32 A.R.T. Advisors, LLC 242,432 1,478,000 0.35%
33 BlackRock Investment Management, LLC 234,286 1,429,000 0.33%
34 GOLDMAN SACHS GROUP INC 226,271 1,380,000 0.32%
35 GOLDMAN SACHS GROUP INC 202,500 1,235,000 0.29% Call
36 CITADEL ADVISORS LLC 187,152 1,142,000 0.27%
37 CREDIT SUISSE AG/ 186,169 1,136,000 0.27%
38 Jefferies Group LLC 173,341 1,057,000 0.25%
39 ALLIANCEBERNSTEIN L.P. 164,734 1,005,000 0.23%
40 BARCLAYS PLC 166,216 997,000 0.23%
41 RENAISSANCE TECHNOLOGIES LLC 162,840 993,000 0.23%
42 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 159,112 971,000 0.23%
43 BB&T SECURITIES, LLC 15,684 956,000 0.22%
44 SUSQUEHANNA INTERNATIONAL GROUP, LLP 150,300 917,000 0.21% Put
45 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 136,000 874,000 0.20%
46 TWIN FOCUS CAPITAL PARTNERS, LLC 140,102 855,000 0.20%
47 TEACHERS ADVISORS, LLC 121,995 744,000 0.17%
48 Spark Investment Management LLC 116,500 710,000 0.17%
49 UNITED SERVICES AUTOMOBILE ASSOCIATION 114,050 696,000 0.16%
50 Lumbard & Kellner, LLC 109,635 669,000 0.16%
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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.