Dark
Light
System
Security
IMMUNOGEN INCORPORATED
IMMUNOGEN INCORPORATED. Institutional holdings reported to the SEC.

Institutional Holders (2015Q3)
Portfolio Summary: 156 Institutional holders with a total value of $752,879,091.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Clearbridge Investments, LLC 14,487,613 139,081,000 18.47%
2 PRIMECAP MANAGEMENT CO/CA/ 12,867,483 123,528,000 16.41%
3 FMR LLC 7,257,201 69,669,000 9.25%
4 VANGUARD GROUP INC 5,925,425 56,884,000 7.56%
5 ORBIMED ADVISORS LLC 3,594,000 34,502,000 4.58%
6 BAKER BROS. ADVISORS LP 3,548,040 34,061,000 4.52%
7 BlackRock Fund Advisors 3,281,417 31,502,000 4.18%
8 STATE STREET CORP 3,225,865 30,971,000 4.11%
9 BlackRock Institutional Trust Company, N.A. 2,052,374 19,703,000 2.62%
10 MILLENNIUM MANAGEMENT LLC 1,555,230 14,930,000 1.98%
11 NORGES BANK 1,530,772 14,696,000 1.95%
12 WELLS FARGO & COMPANY/MN 1,452,665 13,946,000 1.85%
13 ALPS ADVISORS INC 134,900 12,950,000 1.72%
14 NORTHERN TRUST CORP 990,205 9,506,000 1.26%
15 BANK OF AMERICA CORP /DE/ 965,094 9,265,000 1.23%
16 Invesco Ltd. 965,048 9,264,000 1.23%
17 FRANKLIN RESOURCES INC 946,301 9,084,000 1.21%
18 MORGAN STANLEY 932,683 8,954,000 1.19%
19 RAYMOND JAMES & ASSOCIATES 593,371 5,696,000 0.76%
20 GEODE CAPITAL MANAGEMENT, LLC 592,500 5,687,000 0.76%
21 DEUTSCHE BANK AG\ 551,721 5,294,000 0.70%
22 D. E. Shaw & Co., Inc. 503,405 4,833,000 0.64%
23 BOGLE INVESTMENT MANAGEMENT L P /DE/ 488,819 4,692,000 0.62%
24 Bank of New York Mellon Corp 468,290 4,496,000 0.60%
25 MACQUARIE GROUP LTD 430,000 4,128,000 0.55%
26 PRUDENTIAL FINANCIAL INC 425,632 4,086,000 0.54%
27 Granahan Investment Management, LLC 401,000 3,850,000 0.51%
28 RENAISSANCE TECHNOLOGIES LLC 393,440 3,777,000 0.50%
29 TIAA CREF INVESTMENT MANAGEMENT LLC 312,272 2,998,000 0.40%
30 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 301,062 2,891,000 0.38%
31 BlackRock Investment Management, LLC 285,854 2,744,000 0.36%
32 Candriam S.C.A. 238,100 2,286,000 0.30%
33 SUSQUEHANNA INTERNATIONAL GROUP, LLP 178,300 1,712,000 0.23% Put
34 Numeric Investors LLC 174,300 1,673,000 0.22%
35 Lumbard & Kellner, LLC 167,025 1,603,000 0.21%
36 PEAK6 Group LLC 161,100 1,547,000 0.21% Call
37 CITIGROUP INC 160,717 1,543,000 0.20%
38 ALLIANCEBERNSTEIN L.P. 158,548 1,522,000 0.20%
39 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 157,135 1,508,000 0.20%
40 NATIXIS ADVISORS, LLC 148,718 1,428,000 0.19%
41 CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM 136,000 1,306,000 0.17%
42 Swiss National Bank 129,700 1,245,000 0.17%
43 TEACHERS ADVISORS, LLC 129,509 1,243,000 0.17%
44 PDT Partners, LLC 127,584 1,225,000 0.16%
45 MARINER INVESTMENT GROUP LLC 122,900 1,180,000 0.16%
46 TWIN FOCUS CAPITAL PARTNERS, LLC 120,541 1,157,000 0.15%
47 CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC. 119,000 1,143,000 0.15%
48 GUGGENHEIM CAPITAL LLC 117,783 1,131,000 0.15%
49 AQR CAPITAL MANAGEMENT LLC 117,183 1,125,000 0.15%
50 SUSQUEHANNA INTERNATIONAL GROUP, LLP 117,000 1,123,000 0.15% Call
Page 1 of 4

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.