Shareholder Holders Values ($) % O/S Shares
Institution 201 273 79.19 70,758,300
Mutual Fund 145 82 22.86 20,429,291
Shareholder Holders Values Change ($) % O/S Shares Change
Buyers 76 31.82 8.61 7,693,441
Sellers 114 -30.15 9.82 -8,776,367
Net -- 1.67 1.21 -1,082,926
Shareholder Values ($) % O/S Shares
Top 10 Inst. 172 50.60 45,211,100
Top 20 Inst. 218.34 63.96 57,143,617
Top 50 Inst. 258.65 74.97 66,983,864
Total Inst. 258.65 74.97 66,983,864
Shareholder Holders Values ($) % O/S Shares
Index 24 53 15.36 13,721,006
CoreGrowth 32 22 5.74 5,124,969
Growth 12 1 0.43 386,238
IncomeValue 2 1 0.33 299,203
Yield 3 0 0.00 3,977
BrokerDealer 18 14 4.18 3,732,125
GARP 22 85 24.70 22,072,566
HedgeFund 10 28 8.10 7,241,210
SectorSpecific 2 39 11.28 10,080,381
Specialty 3 5 1.43 1,275,371
CoreValue 15 9 3.51 3,133,800
DeepValue 8 2 0.55 495,074
Momentum 1 0 0.00 4,218
Holder Shares Held % O/S Shares Change Filing Date
ClearBridge Investments, LLC 14,428,856 16.15 884,524 03/31/2017
OrbiMed Advisors, LLC 6,095,647 6.82 0 03/31/2017
BlackRock Institutional Trust Company, N.A. 4,890,641 5.47 198,696 03/31/2017
The Vanguard Group, Inc. 4,110,431 4.60 27,141 03/31/2017
Redmile Group, LLC 3,984,734 4.46 3,984,734 03/31/2017
PRIMECAP Management Company 3,966,000 4.44 -1,086,943 03/31/2017
Baker Bros. Advisors LP 3,015,353 3.37 0 03/31/2017
State Street Global Advisors (US) 1,598,707 1.79 72,309 03/31/2017
Pinnacle Associates Ltd. 1,589,959 1.78 -33,165 03/31/2017
Norges Bank Investment Management (NBIM) 1,530,772 1.71 0 12/31/2016
Wells Fargo Advisors 1,523,724 1.71 126,075 03/31/2017
Renaissance Technologies LLC 1,477,946 1.65 -1,003,794 03/31/2017
PanAgora Asset Management Inc. 1,471,763 1.65 112,900 03/31/2017
Deutsche Asset Management Americas 1,349,993 1.51 -143,947 03/31/2017
Managed Account Advisors LLC 1,273,871 1.43 118,614 03/31/2017
Millennium Management LLC 1,106,695 1.24 -1,111,655 03/31/2017
Schonfeld Strategic Advisors LLC 1,025,176 1.15 250,176 03/31/2017
Northern Trust Investments, Inc. 996,821 1.12 41,174 03/31/2017
Morgan Stanley Wealth Management 904,499 1.01 45,373 03/31/2017
Fidelity Management & Research Company 802,029 0.90 0 03/31/2017
Delaware Investments 700,000 0.78 0 03/31/2017
Geode Capital Management, L.L.C. 678,343 0.76 22,991 03/31/2017
Raymond James & Associates, Inc. 628,236 0.70 -13,924 03/31/2017
Enyedy (Mark J) 600,100 0.67 0 04/17/2017
Goldman Sachs & Company, Inc. 576,588 0.65 -50,675 03/31/2017
D. E. Shaw & Co., L.P. 484,908 0.54 35,652 03/31/2017
Medical Strategy GmbH 459,962 0.51 0 02/28/2017
TIAA Global Asset Management 434,145 0.49 -38,682 03/31/2017
Columbia Threadneedle Investments (US) 394,770 0.44 394,770 03/31/2017
Oppenheim Asset Management Services S.à r.l. 373,862 0.42 0 03/31/2017
Charles Schwab Investment Management, Inc. 329,979 0.37 -68,789 03/31/2017
BlackRock Investment Management, LLC 313,918 0.35 -6,891 03/31/2017
KBC Group NV 299,613 0.34 17,893 03/31/2017
Morgan Stanley & Co. LLC 291,605 0.33 -113,336 03/31/2017
Gregory (Richard J) 276,481 0.31 0 04/17/2017
Moloney Securities Asset Management, LLC 274,450 0.31 72,900 03/31/2017
BNY Mellon Asset Management 272,217 0.30 55,195 03/31/2017
Fisher Investments 253,676 0.28 5,100 03/31/2017
Granahan Investment Management, Inc. 246,960 0.28 246,960 09/30/2016
APG Asset Management 240,300 0.27 240,300 12/31/2015
Johnston David Brannon 201,750 0.23 0 04/17/2017
Junius (Daniel M) 196,700 0.22 0 04/17/2017
J.P. Morgan Securities LLC 186,649 0.21 186,649 03/31/2017
Columbia Wanger Asset Management, LLC 177,900 0.20 0 04/30/2017
Barrows (Craig) 171,500 0.19 140,400 02/21/2017
California State Teachers Retirement System 165,950 0.19 -7,500 03/31/2017
Berkenblit (Anna M.D.) 163,300 0.18 0 04/17/2017
Schweizerische Nationalbank 159,400 0.18 0 03/31/2017
Mellon Capital Management Corporation 153,464 0.17 -1,807 03/31/2017
Lambert (John M) 133,521 0.15 13,664 11/02/2016

Ownership data is current as of filing date shown and is provided by Thompson Reuters, a third party service, and ImmunoGen, Inc. does not maintain or provide information directly to this service.


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