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

Institutional Holders (2014Q2)
Portfolio Summary: 144 Institutional holders with a total value of $875,702,384.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 PRIMECAP MANAGEMENT CO/CA/ 11,922,396 141,280,000 16.13%
2 FMR LLC 11,640,950 137,945,000 15.75%
3 Clearbridge Investments, LLC 9,980,315 118,267,000 13.51%
4 VANGUARD GROUP INC 5,201,812 61,641,000 7.04%
5 FIRST TRUST ADVISORS LP 4,121,730 48,843,000 5.58%
6 SECTORAL ASSET MANAGEMENT INC 3,218,276 38,137,000 4.36%
7 BB BIOTECH AG 3,165,816 37,515,000 4.28%
8 BlackRock Fund Advisors 2,933,416 34,761,000 3.97%
9 STATE STREET CORP 2,535,747 30,049,000 3.43%
10 BlackRock Institutional Trust Company, N.A. 2,444,049 28,962,000 3.31%
11 Artal Group S.A. 1,500,000 17,775,000 2.03%
12 WELLINGTON MANAGEMENT GROUP LLP 1,307,500 15,495,000 1.77%
13 NORGES BANK 1,089,562 12,911,000 1.47%
14 NORTHERN TRUST CORP 997,714 11,822,000 1.35%
15 MORGAN STANLEY 826,965 9,800,000 1.12%
16 WELLS FARGO & COMPANY/MN 770,123 9,126,000 1.04%
17 DEUTSCHE BANK AG\ 593,127 7,027,000 0.80%
18 Artal Group S.A. 550,000 6,518,000 0.74% Call
19 Granahan Investment Management, LLC 521,052 6,174,000 0.71%
20 GEODE CAPITAL MANAGEMENT, LLC 482,071 5,712,000 0.65%
21 Bank of New York Mellon Corp 423,744 5,021,000 0.57%
22 RENAISSANCE TECHNOLOGIES LLC 415,440 4,923,000 0.56%
23 MANAGED ACCOUNT ADVISORS LLC 375,989 4,456,000 0.51%
24 TIAA CREF INVESTMENT MANAGEMENT LLC 360,490 4,272,000 0.49%
25 MACQUARIE GROUP LTD 265,000 3,140,000 0.36%
26 RAYMOND JAMES & ASSOCIATES 261,155 3,095,000 0.35%
27 BlackRock Investment Management, LLC 234,797 2,782,000 0.32%
28 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 232,205 2,752,000 0.31%
29 CREDIT SUISSE AG/ 228,725 2,709,000 0.31%
30 GUGGENHEIM CAPITAL LLC 219,218 2,598,000 0.30%
31 PICTET ASSET MANAGEMENT LTD 204,150 2,419,000 0.28%
32 PRUDENTIAL FINANCIAL INC 173,688 2,058,000 0.24%
33 ALLIANCEBERNSTEIN L.P. 167,440 1,984,000 0.23%
34 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 156,636 1,856,000 0.21%
35 MASON STREET ADVISORS, LLC 154,800 1,834,000 0.21%
36 CITADEL ADVISORS LLC 152,048 1,802,000 0.21%
37 MILLENNIUM MANAGEMENT LLC 147,994 1,754,000 0.20%
38 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 142,700 1,691,000 0.19%
39 TWIN FOCUS CAPITAL PARTNERS, LLC 140,000 1,659,000 0.19%
40 SUSQUEHANNA INTERNATIONAL GROUP, LLP 134,300 1,591,000 0.18% Put
41 MARINER INVESTMENT GROUP LLC 130,800 1,550,000 0.18%
42 SUSQUEHANNA INTERNATIONAL GROUP, LLP 130,012 1,540,000 0.18%
43 TEACHERS ADVISORS, LLC 121,995 1,446,000 0.17%
44 SUSQUEHANNA INTERNATIONAL GROUP, LLP 120,300 1,426,000 0.16% Call
45 UNITED SERVICES AUTOMOBILE ASSOCIATION 114,050 1,351,000 0.15%
46 Nationwide Fund Advisors 100,710 1,193,000 0.14%
47 Perigon Wealth Management, LLC 100,000 1,185,000 0.14%
48 Rhenman & Partners Asset Management AB 98,702 1,170,000 0.13%
49 Swiss National Bank 95,800 1,135,000 0.13%
50 ProShare Advisors LLC 93,917 1,113,000 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.