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

Institutional Holders (2014Q3)
Portfolio Summary: 146 Institutional holders with a total value of $791,011,916.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 PRIMECAP MANAGEMENT CO/CA/ 11,918,396 126,216,000 15.96%
2 Clearbridge Investments, LLC 10,967,847 116,149,000 14.68%
3 FMR LLC 10,260,241 108,656,000 13.74%
4 FIRST TRUST ADVISORS LP 5,811,998 61,549,000 7.78%
5 VANGUARD GROUP INC 5,175,126 54,805,000 6.93%
6 BB BIOTECH AG 3,165,816 33,526,000 4.24%
7 BlackRock Fund Advisors 2,921,181 30,935,000 3.91%
8 STATE STREET CORP 2,815,046 29,809,000 3.77%
9 BlackRock Institutional Trust Company, N.A. 2,403,589 25,454,000 3.22%
10 SECTORAL ASSET MANAGEMENT INC 2,269,597 24,035,000 3.04%
11 Artal Group S.A. 1,500,000 15,885,000 2.01%
12 NORTHERN TRUST CORP 1,000,721 10,598,000 1.34%
13 MORGAN STANLEY 995,994 10,547,000 1.33%
14 Invesco Ltd. 930,633 9,855,000 1.25%
15 WELLS FARGO & COMPANY/MN 876,418 9,281,000 1.17%
16 NORGES BANK 839,562 8,891,000 1.12%
17 WELLINGTON MANAGEMENT GROUP LLP 633,248 6,706,000 0.85%
18 Granahan Investment Management, LLC 520,332 5,510,000 0.70%
19 MANAGED ACCOUNT ADVISORS LLC 485,595 5,142,000 0.65%
20 GEODE CAPITAL MANAGEMENT, LLC 479,387 5,076,000 0.64%
21 Bank of New York Mellon Corp 451,497 4,781,000 0.60%
22 DEUTSCHE BANK AG\ 402,073 4,256,000 0.54%
23 Artal Group S.A. 400,000 4,236,000 0.54% Call
24 RENAISSANCE TECHNOLOGIES LLC 370,446 3,923,000 0.50%
25 TIAA CREF INVESTMENT MANAGEMENT LLC 334,835 3,546,000 0.45%
26 MACQUARIE GROUP LTD 290,000 3,071,000 0.39%
27 RAYMOND JAMES & ASSOCIATES 289,233 3,063,000 0.39%
28 GUGGENHEIM CAPITAL LLC 245,170 2,596,000 0.33%
29 BlackRock Investment Management, LLC 236,217 2,502,000 0.32%
30 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 228,465 2,420,000 0.31%
31 GOLDMAN SACHS GROUP INC 218,778 2,317,000 0.29%
32 Rhenman & Partners Asset Management AB 180,000 1,906,000 0.24%
33 BANK OF AMERICA CORP /DE/ 176,019 1,864,000 0.24%
34 ALLIANCEBERNSTEIN L.P. 167,440 1,773,000 0.22%
35 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 158,435 1,678,000 0.21%
36 PICTET ASSET MANAGEMENT LTD 157,150 1,664,000 0.21%
37 MARINER INVESTMENT GROUP LLC 155,500 1,647,000 0.21%
38 MASON STREET ADVISORS, LLC 154,800 1,639,000 0.21%
39 MILLENNIUM MANAGEMENT LLC 146,500 1,551,000 0.20%
40 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 145,500 1,541,000 0.19%
41 TWIN FOCUS CAPITAL PARTNERS, LLC 140,480 1,488,000 0.19%
42 BARCLAYS PLC 145,149 1,451,000 0.18%
43 CITADEL ADVISORS LLC 129,004 1,366,000 0.17%
44 TEACHERS ADVISORS, LLC 121,995 1,292,000 0.16%
45 GOLDMAN SACHS GROUP INC 119,000 1,260,000 0.16% Call
46 UNITED SERVICES AUTOMOBILE ASSOCIATION 114,050 1,208,000 0.15%
47 BB&T SECURITIES, LLC 10,757 1,139,000 0.14%
48 SMITH ASSET MANAGEMENT GROUP LP 107,270 1,136,000 0.14%
49 SUSQUEHANNA INTERNATIONAL GROUP, LLP 101,800 1,078,000 0.14% Put
50 Nationwide Fund Advisors 101,037 1,070,000 0.14%
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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.