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

Institutional Holders (2015Q2)
Portfolio Summary: 147 Institutional holders with a total value of $1,123,586,269.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Clearbridge Investments, LLC 14,655,889 210,752,000 18.76%
2 PRIMECAP MANAGEMENT CO/CA/ 12,867,483 185,034,000 16.47%
3 FMR LLC 8,959,497 128,838,000 11.47%
4 VANGUARD GROUP INC 5,724,157 82,314,000 7.33%
5 MILLENNIUM MANAGEMENT LLC 3,968,772 57,071,000 5.08%
6 STATE STREET CORP 3,269,703 47,020,000 4.18%
7 BlackRock Fund Advisors 3,176,229 45,674,000 4.07%
8 BAKER BROS. ADVISORS LP 2,320,424 33,368,000 2.97%
9 BlackRock Institutional Trust Company, N.A. 2,291,549 32,952,000 2.93%
10 Invesco Ltd. 1,650,728 23,737,000 2.11%
11 NORGES BANK 1,640,389 23,589,000 2.10%
12 WELLS FARGO & COMPANY/MN 1,495,133 21,500,000 1.91%
13 MORGAN STANLEY 1,096,827 15,773,000 1.40%
14 ORBIMED ADVISORS LLC 1,030,000 14,811,000 1.32%
15 NORTHERN TRUST CORP 994,244 14,297,000 1.27%
16 MANAGED ACCOUNT ADVISORS LLC 881,007 12,669,000 1.13%
17 FRANKLIN RESOURCES INC 874,050 12,569,000 1.12%
18 BOGLE INVESTMENT MANAGEMENT L P /DE/ 851,538 12,245,000 1.09%
19 GEODE CAPITAL MANAGEMENT, LLC 571,468 8,217,000 0.73%
20 RAYMOND JAMES & ASSOCIATES 563,515 8,103,000 0.72%
21 Bank of New York Mellon Corp 540,850 7,777,000 0.69%
22 DEUTSCHE BANK AG\ 472,939 6,799,000 0.61%
23 MACQUARIE GROUP LTD 430,000 6,183,000 0.55%
24 Granahan Investment Management, LLC 419,000 6,025,000 0.54%
25 PRUDENTIAL FINANCIAL INC 387,932 5,578,000 0.50%
26 TIAA CREF INVESTMENT MANAGEMENT LLC 331,740 4,770,000 0.42%
27 Candriam S.C.A. 300,000 4,314,000 0.38%
28 BlackRock Investment Management, LLC 292,035 4,199,000 0.37%
29 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 283,281 4,074,000 0.36%
30 SUSQUEHANNA INTERNATIONAL GROUP, LLP 251,000 3,609,000 0.32% Call
31 ALLIANCEBERNSTEIN L.P. 175,734 2,527,000 0.22%
32 CREDIT SUISSE AG/ 175,126 2,518,000 0.22%
33 DRIEHAUS CAPITAL MANAGEMENT LLC 173,720 2,498,000 0.22%
34 Lumbard & Kellner, LLC 165,925 2,386,000 0.21%
35 GOLDMAN SACHS GROUP INC 160,826 2,313,000 0.21%
36 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 157,335 2,262,000 0.20%
37 MARINER INVESTMENT GROUP LLC 153,900 2,213,000 0.20%
38 NATIXIS ADVISORS, LLC 153,521 2,208,000 0.20%
39 JACOBS LEVY EQUITY MANAGEMENT, INC 148,228 2,132,000 0.19%
40 CITIGROUP INC 139,564 2,007,000 0.18%
41 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 136,000 1,956,000 0.17%
42 CITADEL ADVISORS LLC 132,435 1,904,000 0.17%
43 Trexquant Investment LP 132,100 1,899,000 0.17%
44 TEACHERS ADVISORS, LLC 129,142 1,857,000 0.17%
45 HIGHBRIDGE CAPITAL MANAGEMENT LLC 128,255 1,845,000 0.16%
46 SUSQUEHANNA INTERNATIONAL GROUP, LLP 127,000 1,826,000 0.16% Put
47 TWIN FOCUS CAPITAL PARTNERS, LLC 120,541 1,733,000 0.15%
48 UNITED SERVICES AUTOMOBILE ASSOCIATION 119,250 1,715,000 0.15%
49 Steinberg Global Asset Management 117,578 1,691,000 0.15%
50 Swiss National Bank 115,200 1,657,000 0.15%
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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.