IMGN

ImmunoGen, Inc. IMGN

Trading inactive

Individual Beneficiary

Name of reporting person Citizenship or organization Sole voting power Shared voting power Sole dispositive power Shared dispositive power Amount beneficially owned Percent of class Accepted date
Rajeev Shah United States of America 0 26916027 0 26916027 26916027 9.99 % 14/02/2024
Peter Kolchinsky United States of America 0 26916027 0 26916027 26916027 9.99 % 14/02/2024
RA Capital Management, L.P. Delaware 0 26916027 0 26916027 26916027 9.99 % 14/02/2024
RA Capital Healthcare Fund, L.P. Delaware 0 26916027 0 26916027 26916027 9.99 % 14/02/2024
Jeremy C. Green United Kingdom 0 16423922 0 16423922 16423922 5.9 % 14/02/2024
Redmile Group, LLC Delaware 0 16423922 0 16423922 16423922 5.9 % 14/02/2024
The Vanguard Group Pennsylvania 0 321537 24891055 575895 25466950 9.13 % 13/02/2024
Adage Capital Partners GP, L.L.C. Delaware 0 971928 0 971928 971928 0.35 % 07/02/2024
Adage Capital Advisors, L.L.C. Delaware 0 971928 0 971928 971928 0.35 % 07/02/2024
Robert Atchinson United States 0 971928 0 971928 971928 0.35 % 07/02/2024
Adage Capital Partners, L.P. Delaware 0 971928 0 971928 971928 0.35 % 07/02/2024
Phillip Gross United States 0 971928 0 971928 971928 0.35 % 07/02/2024
STATE STREET CORPORATION BOSTON, MASSACHUSETTS 0 7395091 0 8075671 8075671 3.02 % 22/01/2024
The Vanguard Group Pennsylvania For 0 243305 13970770 407665 14378435 6.51 % 09/02/2023
BlackRock, Inc. Delaware 17607073 0 18016002 0 18016002 8.2 % 03/02/2023
Robert Atchinson United States 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Phillip Gross United States 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Adage Capital Partners, L.P. Delaware 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Phillip Gross United States 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Robert Atchinson United States 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Adage Capital Advisors, L.L.C. Delaware 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Adage Capital Partners GP, L.L.C. Delaware 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Adage Capital Partners, L.P. Delaware 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Adage Capital Partners GP, L.L.C. Delaware 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Adage Capital Advisors, L.L.C. Delaware 0 11119000 0 11119000 11119000 5.04 % 27/12/2022
Deerfield Partners, L.P. Delaware 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
James E. Flynn United States 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
Deerfield Management Company, L.P. Delaware 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
Deerfield Management Company, L.P. Delaware 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
Deerfield Partners, L.P. Delaware 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
Deerfield Mgmt, L.P. Delaware 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
James E. Flynn United States 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
Deerfield Mgmt, L.P. Delaware 0 14779590 0 14779590 14779590 6.7 % 19/05/2022
Phillip Gross United States 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Adage Capital Advisors, L.L.C. Delaware 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Adage Capital Partners, L.P. Delaware 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Adage Capital Partners GP, L.L.C. Delaware 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Robert Atchinson United States 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Adage Capital Partners, L.P. Delaware 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Adage Capital Partners GP, L.L.C. Delaware 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Adage Capital Advisors, L.L.C. Delaware 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Robert Atchinson United States 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Phillip Gross United States 0 11586193 0 11586193 11586193 5.25 % 04/04/2022
Peter Kolchinsky United States America 0 22162958 0 22162958 22162958 9.99 % 14/02/2022
Rajeev Shah United States America 0 22162958 0 22162958 22162958 9.99 % 14/02/2022
RA Capital Management, L.P. Delaware 0 22162958 0 22162958 22162958 9.99 % 14/02/2022
RA Capital Healthcare Fund, L.P. Delaware 0 22162958 0 22162958 22162958 9.99 % 14/02/2022
The Vanguard Group Pennsylvania For 0 273106 14704953 426799 15131752 6.87 % 10/02/2022
BlackRock, Inc. Delaware 0 0 0 0 14863304 6.9 % 08/02/2022
Wellington Management Company LLP Delaware 0 12512500 0 13280064 13280064 6.03 % 10/01/2022
Wellington Group Holdings LLP Delaware 0 12713021 0 13902498 13902498 6.32 % 10/01/2022
Wellington Management Group LLP Massachusetts 0 12713021 0 13902498 13902498 6.32 % 10/01/2022
Wellington Management Company LLP Delaware 0 12512500 0 13280064 13280064 6.03 % 10/01/2022
Wellington Investment Advisors Holdings LLP Delaware 0 12713021 0 13902498 13902498 6.32 % 10/01/2022
Wellington Management Group LLP Massachusetts 0 12713021 0 13902498 13902498 6.32 % 10/01/2022
Wellington Group Holdings LLP Delaware 0 12713021 0 13902498 13902498 6.32 % 10/01/2022
Wellington Investment Advisors Holdings LLP Delaware 0 12713021 0 13902498 13902498 6.32 % 10/01/2022
RA Capital Healthcare Fund, L.P. Delaware 0 16760925 0 16760925 0 8.9 % 16/02/2021
RA Capital Management, L.P. Delaware 0 18417458 0 18417458 18417458 9.8 % 16/02/2021
Peter Kolchinsky United States of America 0 18417458 0 18417458 18417458 9.8 % 16/02/2021
Rajeev Shah United States of America 0 18417458 0 18417458 18417458 9.8 % 16/02/2021
Jeremy C. Green United Kingdom 0 10528179 0 10528179 10528179 5.6 % 16/02/2021
Redmile Group, LLC Delaware 0 10528179 0 10528179 10528179 5.6 % 16/02/2021
Renaissance Technologies LLC Delaware 4235966 0 4235966 0 4235966 2.18 % 10/02/2021
RENAISSANCE TECHNOLOGIES HOLDINGS CORPORATION Delaware 4235966 0 4235966 0 4235966 2.18 % 10/02/2021
RENAISSANCE TECHNOLOGIES HOLDINGS CORPORATION Delaware 4235966 0 4235966 0 4235966 2.18 % 10/02/2021
Renaissance Technologies LLC Delaware 4235966 0 4235966 0 4235966 2.18 % 10/02/2021
The Vanguard Group Pennsylvania 0 281838 13738606 418394 14157000 7.27 % 10/02/2021
The Vanguard Group Pennsylvania 0 281838 13738606 418394 14157000 7.27 % 10/02/2021
ClearBridge Investments, LLC Delaware 4 4 4 4 6892928 3.5 % 09/02/2021
ClearBridge Investments, LLC Delaware 4 4 4 4 6892928 3.5 % 09/02/2021
FMR LLC Delaware 5119097 0 12542613 0 12542613 6.441 % 08/02/2021
Abigail P. Johnson United States of America 0 0 12542613 0 12542613 6.441 % 08/02/2021
FMR LLC Delaware 5119097 0 12542613 0 12542613 6.441 % 08/02/2021
Abigail P. Johnson United States of America 0 0 12542613 0 12542613 6.441 % 08/02/2021
Wellington Management Company LLP Delaware 0 20771745 0 21356379 21356379 10.97 % 04/02/2021
Wellington Investment Advisors Holdings LLP Delaware 0 20975941 0 22084103 22084103 11.34 % 04/02/2021
Wellington Group Holdings LLP Delaware 0 20975941 0 22084103 22084103 11.34 % 04/02/2021
Wellington Management Group LLP Massachusetts 0 20975941 0 22084103 22084103 11.34 % 04/02/2021
Wellington Management Group LLP Massachusetts 0 20975941 0 22084103 22084103 11.34 % 04/02/2021
Wellington Group Holdings LLP Delaware 0 20975941 0 22084103 22084103 11.34 % 04/02/2021
Wellington Investment Advisors Holdings LLP Delaware 0 20975941 0 22084103 22084103 11.34 % 04/02/2021
Wellington Management Company LLP Delaware 0 20771745 0 21356379 21356379 10.97 % 04/02/2021
BlackRock, Inc. Delaware 14912770 0 15156582 0 15156582 7.8 % 29/01/2021
Jeremy C. Green United Kingdom 0 14639960 0 14639960 14639960 9.8 % 14/02/2020
Redmile Group, LLC Delaware 0 14639960 0 14639960 14639960 9.8 % 14/02/2020
Clearbridge Investments, LLC010846058 Delaware 8696861 0 9050869 0 9050869 6.05 % 14/02/2020
RENAISSANCE TECHNOLOGIES HOLDINGS CORPORATION Delaware 10559739 0 10634387 72752 10707139 7.15 % 12/02/2020
Renaissance Technologies LLC Delaware 10559739 0 10634387 72752 10707139 7.15 % 12/02/2020
Renaissance Technologies LLC Delaware 10559739 0 10634387 72752 10707139 7.15 % 12/02/2020
RENAISSANCE TECHNOLOGIES HOLDINGS CORPORATION Delaware 10559739 0 10634387 72752 10707139 7.15 % 12/02/2020
The Vanguard Group Pennsylvania 232452 11212 14000749 224921 14225670 9.5 % 12/02/2020
Wellington Management Group LLP Massachusetts 0 17465624 0 18102224 18102224 10.39 % 10/02/2020
Wellington Management Company LLP Delaware 0 17262324 0 17539024 17539024 10.07 % 10/02/2020
Wellington Investment Advisors Holdings LLP Delaware 0 17465624 0 18102224 18102224 10.39 % 10/02/2020
Wellington Group Holdings LLP Delaware 0 17465624 0 18102224 18102224 10.39 % 10/02/2020
BlackRock, Inc. Delaware 11908678 0 12181989 0 12181989 8.1 % 05/02/2020
Morgan Stanley Delaware. 1890053 0 2760341 2760341 1.8 % 09/05/2019
Clearbridge Investments, LLC010846058 Delaware 8058747 0 8406481 0 8406481 5.64 % 14/02/2019
STATE STREET CORPORATION BOSTON, MASSACHUSETTS 0 7601943 0 8100371 8100371 5.4 % 14/02/2019
The Vanguard Group Pennsylvania 301687 8200 10201079 291144 10492223 7.03 % 12/02/2019
BlackRock, Inc. Delaware 12056991 0 12378204 0 12378204 8.3 % 04/02/2019
Morgan Stanley Delaware. 7252967 0 8026699 8026699 5.3 % 11/01/2019
JEREMY C. GREEN UNITED KINGDOM 0 10906962 0 10906962 10906962 8.25 % 14/02/2018
Redmile Group, LLC DELAWARE 0 10906962 0 10906962 10906962 8.25 % 14/02/2018
Clearbridge Investments, LLC010846058 Delaware 10586790 0 11071365 0 11071365 8.37 % 14/02/2018
Highbridge Capital Management, LLC State of Delaware 0 130363 0 130363 130363 0.1 % 14/02/2018
Highbridge Capital Management, LLC State of Delaware 0 130363 0 130363 130363 0.1 % 14/02/2018
OrbiMed Capital LLC Delaware 0 1515572 0 1515572 1.15 % 13/02/2018
OrbiMed Capital LLC Delaware 0 1515572 0 1515572 1.15 % 13/02/2018
OrbiMed Advisors LLC Delaware 0 1318554 0 1318554 1318554 1 % 13/02/2018
OrbiMed Advisors LLC Delaware 0 1318554 0 1318554 1318554 1 % 13/02/2018
The Vanguard Group Pennsylvania 191574 5200 9463628 191899 9655527 7.3 % 08/02/2018
BlackRock, Inc. Delaware 8295010 0 8470097 23878 8493975 6.4 % 01/02/2018
BlackRock, Inc. Delaware 5327839 23878 5476981 23878 5500859 4.9 % 10/10/2017
Clearbridge Investments, LLC010846058 Delaware 10951016 0 11444138 0 11445611 10.2 % 10/10/2017
Clearbridge Investments, LLC010846058 Delaware 10951016 0 11444138 0 11445611 10.2 % 10/10/2017
Polygon Management Ltd. Cayman Islands 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Global Partners LLP United Kingdom 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
TFG Asset Management L.P. Cayman Islands 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Patrick G. G. Dear United Kingdom 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Reade E. Griffith United Kingdom 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Convertible Opportunity Master Fund Cayman Islands 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Global Partners LP Delaware 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Convertible Opportunity Master Fund Cayman Islands 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Management Ltd. Cayman Islands 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Global Partners LP Delaware 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Polygon Global Partners LLP United Kingdom 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
TFG Asset Management L.P. Cayman Islands 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Patrick G. G. Dear United Kingdom 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Reade E. Griffith United Kingdom 0 4894938 0 4894938 4894938 5.2 % 07/08/2017
Highbridge Capital Management, LLC State of Delaware 0 5036294 0 5036294 5036294 5.34 % 24/04/2017
Highbridge Capital Management, LLC State of Delaware 0 5036294 0 5036294 5036294 5.34 % 24/04/2017
PRIMECAP Management Company 3966000 4.54 % 06/03/2017
Felix J. Baker 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Baker Bros. Advisors LP 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Baker Bros. Advisors LP 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Baker Bros. Advisors (GP) LLC 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Baker Bros. Advisors (GP) LLC 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Julian C. Baker 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Felix J. Baker 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Julian C. Baker 3015353 0 3015353 0 3015353 3.5 % 14/02/2017
Clearbridge Investments, LLC010846058 Delaware 12954885 0 13544332 0 13544332 15.51 % 14/02/2017
OrbiMed Advisors LLC Delaware 0 3510945 0 3510945 3510945 3.96 % 13/02/2017
OrbiMed Capital LLC Delaware 0 5323202 0 0 5323202 6.03 % 13/02/2017
Samuel D. Isaly United States 0 8834147 0 8834147 8834147 9.85 % 13/02/2017
The Vanguard Group Pennsylvania 163503 5200 3914587 168703 4083290 4.67 % 10/02/2017
PRIMECAP Management Company 5052943 5.79 % 09/02/2017
BlackRock, Inc. Delaware 5048174 23878 5235986 23878 5259864 6 % 25/01/2017
PRIMECAP Management Company 6606643 7.57 % 06/12/2016
FMR LLC Delaware 0 0 802029 0 802029 0.918 % 10/11/2016
Abigail P. Johnson United States of America 0 0 802029 0 802029 0.918 % 10/11/2016
FMR LLC Delaware 0 0 802029 0 802029 0.918 % 10/11/2016
Abigail P. Johnson United States of America 0 0 802029 0 802029 0.918 % 10/11/2016
PRIMECAP Management Company 10138629 11.64 % 10/06/2016
Baker Bros. Advisors (GP) LLC 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Baker Bros. Advisors (GP) LLC 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Felix J. Baker 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Baker Bros. Advisors LP 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Felix J. Baker 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Julian C. Baker 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Julian C. Baker 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Baker Bros. Advisors LP 4452445 0 4452445 0 4452445 5.1 % 16/02/2016
Clearbridge Investments, LLC010846058 Delaware 13952176 0 14319106 0 14319106 16.46 % 16/02/2016
OrbiMed Advisors LLC Delaware 0 1919480 0 1919480 1919480 2.21 % 12/02/2016
Samuel D. Isaly United States 0 6095647 0 6095647 6095647 7.01 % 12/02/2016
OrbiMed Capital LLC Delaware 0 4176167 0 0 4176167 4.8 % 12/02/2016
PRIMECAP Management Company 12867483 14.79 % 12/02/2016
PRIMECAP Management Company 12867483 14.79 % 12/02/2016
The Vanguard Group Pennsylvania For 190488 0 6200194 185188 6385382 7.34 % 11/02/2016
The Vanguard Group Pennsylvania 190488 6200194 185188 6385382 7.34 % 11/02/2016
The Vanguard Group Pennsylvania 190488 6200194 185188 6385382 7.34 % 11/02/2016
BlackRock, Inc. Delaware 5540958 0 5737145 0 5737145 6.6 % 26/01/2016
PRIMECAP Management Company 12127073 14.11 % 13/02/2015
Clearbridge Investments, LLC010846058 Delaware 13150605 0 13500010 0 13500010 15.71 % 10/02/2015
The Vanguard Group Pennsylvania 118193 5199687 110493 5310180 6.17 % 10/02/2015
BlackRock, Inc. Delaware 5760050 0 5960625 0 5960625 6.9 % 29/01/2015
PRIMECAP Management Company 12675427 14.84 % 14/02/2014
Wellington Management Company, LLP Massachusetts 0 2430627 0 3180697 3180697 3.72 % 14/02/2014
The Vanguard Group Pennsylvania 122138 4923900 117838 5041738 5.9 % 11/02/2014
BlackRock, Inc. Delaware 5542725 0 5817054 0 5817054 6.8 % 29/01/2014
ClearBridge Investments, DE 8488493 0 8759715 0 8759715 10.26 % 09/12/2013
N/A Curacao 0 3551432 0 3551432 3551432 4.2 % 13/02/2013
BB Biotech AG Switzerland 0 3551432 0 3551432 3551432 4.2 % 13/02/2013
The Vanguard Group Pennsylvania 119436 4427737 116236 4543973 5.4 % 13/02/2013
BlackRock, Inc. Delaware 4975782 0 4975782 0 4975782 5.92 % 08/02/2013
BlackRock, Inc. Delaware 4230956 0 4230956 0 4230956 5.54 % 13/02/2012
PRIMECAP Management Company 10187169 14.99 % 14/02/2011
BlackRock, Inc. Delaware 3905184 0 3905184 0 3905184 5.75 % 04/02/2011
BB Biotech AG Switzerland 0 3439378 0 3439378 3439378 5.1 % 14/05/2010
Biotech Target N.V. Netherlands Antilles 0 3439378 0 3439378 3439378 5.1 % 14/05/2010
Biotech Target N.V. Netherlands Antilles 0 3439378 0 3439378 3439378 5.1 % 14/05/2010
BB Biotech AG Switzerland 0 3439378 0 3439378 3439378 5.1 % 14/05/2010
PRIMECAP Odyssey Aggressive Growth Fund 225 South Lake Ave., #400, Pasadena, CA 91101 2944512 0 2944512 0 2944512 5.14 % 09/04/2010
PRIMECAP Odyssey Aggressive Growth Fund 225 South Lake Ave., #400, Pasadena, CA 91101 2944512 0 2944512 0 2944512 5.14 % 09/04/2010
PRIMECAP Odyssey Growth Fund 225 South Lake Ave., #400, Pasadena, CA 91101 4700000 0 4700000 0 4700000 8.19 % 09/04/2010
PRIMECAP Odyssey Growth Fund 225 South Lake Ave., #400, Pasadena, CA 91101 4700000 0 4700000 0 4700000 8.19 % 09/04/2010
PRIMECAP Management Company 225 South Lake Ave., #400, Pasadena, CA 91101 5848250 0 6793125 0 6793125 0 % 08/03/2010
PRIMECAP Management Company 225 South Lake Ave., #400, Pasadena, CA 91101 5848250 0 6793125 0 6793125 0 % 08/03/2010
BVF Partners L.P. Delaware 0 381972 0 381972 381972 0 % 10/02/2010
BVF Investments, L.L.C. Delaware 0 381972 0 381972 381972 0 % 10/02/2010
Biotechnology Value Fund, L.P. Delaware 0 0 0 0 0 0 % 10/02/2010
Investment 10, L.L.C. Illinois 0 0 0 0 0 0 % 10/02/2010
Biotechnology Value Fund II, L.P. Delaware 0 0 0 0 0 0 % 10/02/2010
BVF Inc. Delaware 0 381972 0 381972 381972 0 % 10/02/2010
Mark N. Lampert United States 0 381972 0 381972 381972 0 % 10/02/2010
PRIMECAP Management Company 225 South Lake Ave., #400, Pasadena, CA 91101 3745800 0 4253300 0 4253300 7.45 % 07/01/2010
PRIMECAP Management Company 225 South Lake Ave., #400, Pasadena, CA 91101 3745800 0 4253300 0 4253300 7.45 % 07/01/2010
Heights Capital Management, Inc. 2048854 4.8 % 04/02/2008
Capital Ventures International 2048854 4.8 % 04/02/2008
Heights Capital Management, Inc. 3953023 9.6 % 01/02/2005
Capital Ventures International 3953023 9.6 % 01/02/2005

Senat trading

Bureau Date de la transaction Date de réception Type Amount Commentaire

Senat Divulgation

Représentant Date de la transaction Date de divulgation Type Amount District