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

Institutional Holders (2015Q1)
Portfolio Summary: 150 Institutional holders with a total value of $663,197,809.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Clearbridge Investments, LLC 14,451,730 129,343,000 19.50%
2 PRIMECAP MANAGEMENT CO/CA/ 12,609,150 112,852,000 17.02%
3 FMR LLC 9,089,083 81,347,000 12.27%
4 VANGUARD GROUP INC 5,578,691 49,929,000 7.53%
5 STATE STREET CORP 4,230,582 37,863,000 5.71%
6 BlackRock Fund Advisors 3,275,470 29,315,000 4.42%
7 BB BIOTECH AG 2,840,816 25,425,000 3.83%
8 BlackRock Institutional Trust Company, N.A. 2,432,888 21,774,000 3.28%
9 NORGES BANK 1,640,389 14,681,000 2.21%
10 WELLS FARGO & COMPANY/MN 1,398,253 12,514,000 1.89%
11 BAKER BROS. ADVISORS LP 999,496 8,945,000 1.35%
12 NORTHERN TRUST CORP 972,515 8,704,000 1.31%
13 MILLENNIUM MANAGEMENT LLC 939,664 8,410,000 1.27%
14 MORGAN STANLEY 939,263 8,406,000 1.27%
15 MANAGED ACCOUNT ADVISORS LLC 839,882 7,517,000 1.13%
16 Artal Group S.A. 600,000 5,370,000 0.81% Call
17 GEODE CAPITAL MANAGEMENT, LLC 549,687 4,919,000 0.74%
18 Bank of New York Mellon Corp 530,662 4,749,000 0.72%
19 DEUTSCHE BANK AG\ 514,466 4,601,000 0.69%
20 RAYMOND JAMES & ASSOCIATES 513,071 4,592,000 0.69%
21 MACQUARIE GROUP LTD 430,000 3,849,000 0.58%
22 Granahan Investment Management, LLC 419,000 3,750,000 0.57%
23 Penn Capital Management Company, LLC 372,401 3,333,000 0.50%
24 Candriam S.C.A. 360,000 3,223,000 0.49%
25 A.R.T. Advisors, LLC 352,751 3,157,000 0.48%
26 TIAA CREF INVESTMENT MANAGEMENT LLC 326,204 2,920,000 0.44%
27 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 274,861 2,461,000 0.37%
28 BB&T SECURITIES, LLC 27,394 2,451,000 0.37%
29 BARCLAYS PLC 294,510 2,355,000 0.36%
30 D. E. Shaw & Co., Inc. 237,175 2,122,000 0.32%
31 BlackRock Investment Management, LLC 236,137 2,113,000 0.32%
32 MARINER INVESTMENT GROUP LLC 234,400 2,098,000 0.32%
33 GOLDMAN SACHS GROUP INC 216,170 1,935,000 0.29%
34 JACOBS LEVY EQUITY MANAGEMENT, INC 196,428 1,758,000 0.27%
35 RUSSELL FRANK CO/ 194,955 1,745,000 0.26%
36 Lumbard & Kellner, LLC 167,665 1,501,000 0.23%
37 ALLIANCEBERNSTEIN L.P. 164,734 1,474,000 0.22%
38 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 156,612 1,402,000 0.21%
39 CITIGROUP INC 151,538 1,357,000 0.20%
40 PRUDENTIAL FINANCIAL INC 147,932 1,324,000 0.20%
41 NATIXIS ADVISORS, LLC 144,081 1,290,000 0.19%
42 TWIN FOCUS CAPITAL PARTNERS, LLC 140,541 1,258,000 0.19%
43 TEACHERS ADVISORS, LLC 137,867 1,234,000 0.19%
44 SUSQUEHANNA INTERNATIONAL GROUP, LLP 134,396 1,202,000 0.18%
45 CREDIT SUISSE AG/ 128,221 1,148,000 0.17%
46 Swiss National Bank 122,200 1,094,000 0.16%
47 SUSQUEHANNA INTERNATIONAL GROUP, LLP 120,300 1,077,000 0.16% Put
48 UNITED SERVICES AUTOMOBILE ASSOCIATION 119,250 1,067,000 0.16%
49 TFS CAPITAL LLC 104,266 933,000 0.14%
50 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 136,000 874,000 0.13%
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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.