MRSN

Mersana Therapeutics, Inc. MRSN

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
Nextech Crossover I SCSp Luxembourg 12067246 0 12067246 0 12067246 9.8 % 14/11/2024
Rocco Sgobbo Switzerland 0 12067246 0 12067246 12067246 9.8 % 14/11/2024
Costas Constantinides Cyprus 0 12067246 0 12067246 12067246 9.8 % 14/11/2024
Ian Charoub Sweden 0 12067246 0 12067246 12067246 9.8 % 14/11/2024
Nextech Crossover I GP S.à r.l. Luxembourg 12067246 0 12067246 0 12067246 9.8 % 14/11/2024
Balyasny Asset Management Holdings LP Delaware 535819 0 535819 0 535819 0.44 % 14/11/2024
BAM GP LLC Delaware 535819 0 535819 0 535819 0.44 % 14/11/2024
Balyasny Asset Management L.P. Delaware 535819 0 535819 0 535819 0.44 % 14/11/2024
Dames GP LLC Delaware 535819 0 535819 0 535819 0.44 % 14/11/2024
Dmitry Balyasny United States 535819 0 535819 0 535819 0.44 % 14/11/2024
Devesh Gandhi Massachusetts 0 1754086 0 1754086 1754086 1.43 % 15/10/2024
SilverArc Capital Management, LLC Delaware 0 1754086 0 1754086 1754086 1.43 % 15/10/2024
Nextech Crossover I GP S.à r.l. Luxembourg 6248843 0 6248843 0 6248843 5.1 % 17/05/2024
Nextech Crossover I SCSp Luxembourg 6248843 0 6248843 0 6248843 5.1 % 17/05/2024
Costas Constantinides Cyprus 0 6248843 0 6248843 6248843 5.1 % 17/05/2024
Ian Charoub Sweden 0 6248843 0 6248843 6248843 5.1 % 17/05/2024
Rocco Sgobbo Switzerland 0 6248843 0 6248843 6248843 5.1 % 17/05/2024
Venrock Healthcare Capital Partners III, L.P. Delaware 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
Shah, Nimish United States 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
VHCP Management EG, LLC Delaware 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
VHCP Management III, LLC Delaware 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
Venrock Healthcare Capital Partners EG, L.P. Delaware 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
VHCP Holdings III, LLC Delaware 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
Koh, Bong United States 0 11328000 0 11328000 11328000 9.4 % 14/02/2024
SilverArc Capital Management, LLC Delaware 0 6420136 0 6420136 6420136 5.3 % 14/02/2024
Devesh Gandhi Massachusetts 0 6420136 0 6420136 6420136 5.3 % 14/02/2024
OrbiMed Advisors LLC Delaware 0 0 0 0 0 0 % 14/02/2024
OrbiMed Capital LLC Delaware 0 0 0 0 0 0 % 14/02/2024
Behzad Aghazadeh United States 0 0 0 0 0 0 % 14/02/2024
Avoro Capital Advisors LLC Delaware 0 0 0 0 0 0 % 14/02/2024
BAM GP LLC Delaware 9698147 0 9698147 0 9698147 8.04 % 14/02/2024
Balyasny Asset Management L.P. Delaware 9698147 0 9698147 0 9698147 8.04 % 14/02/2024
Balyasny Asset Management Holdings LP Delaware 9698147 0 9698147 0 9698147 8.04 % 14/02/2024
Dames GP LLC Delaware 9698147 0 9698147 0 9698147 8.04 % 14/02/2024
Dmitry Balyasny United States 9698147 0 9698147 0 9698147 8.04 % 14/02/2024
BlackRock, Inc. Delaware 7745336 0 7844282 0 7844282 6.5 % 29/01/2024
STATE STREET CORPORATION BOSTON, MASSACHUSETTS 0 2207672 0 2329434 2329434 1.93 % 22/01/2024
EcoR1 Capital, LLC Delaware 0 0 0 0 9 16.9 % 27/07/2023
EcoR1 Capital Fund Qualified, L.P. Delaware 0 0 0 0 9 16 % 27/07/2023
Oleg Nodelman United States 0 0 0 0 9 16.9 % 27/07/2023
EcoR1 Capital, LLC Delaware 0 0 0 0 9 16.9 % 27/07/2023
Oleg Nodelman United States 0 0 0 0 9 16.9 % 27/07/2023
EcoR1 Capital Fund Qualified, L.P. Delaware 0 0 0 0 9 16 % 27/07/2023
OrbiMed Capital LLC Delaware 7082837 0 7082837 0 7082837 7.1 % 14/02/2023
OrbiMed Advisors LLC Delaware 0 1928600 0 1928600 1928600 1.9 % 14/02/2023
OrbiMed Advisors LLC Delaware 0 1928600 0 1928600 1928600 1.9 % 14/02/2023
OrbiMed Capital LLC Delaware 7082837 0 7082837 0 7082837 7.1 % 14/02/2023
BB Biotech AG Switzerland 0 4066200 0 4066200 4066200 4.1 % 14/02/2023
Biotech Target N.V. Curaçao 0 4066200 0 4066200 4066200 4.1 % 14/02/2023
BB Biotech AG Switzerland 0 4066200 0 4066200 4066200 4.1 % 14/02/2023
Biotech Target N.V. Curaçao 0 4066200 0 4066200 4066200 4.1 % 14/02/2023
The Vanguard Group Pennsylvania For 0 69574 4306404 142636 4449040 4.46 % 09/02/2023
BlackRock, Inc. Delaware 7296856 0 7491929 0 7491929 7.5 % 31/01/2023
Israel A. Englander 3663527 3.7 % 19/01/2023
Israel A. Englander 3663527 3.7 % 19/01/2023
Millennium Group Management LLC 3663527 3.7 % 19/01/2023
Millennium Management LLC 3663527 3.7 % 19/01/2023
Millennium Management LLC 3663527 3.7 % 19/01/2023
Millennium Group Management LLC 3663527 3.7 % 19/01/2023
Millennium Management LLC 3730711 5.2 % 17/02/2022
Millennium Group Management LLC 3730711 5.2 % 17/02/2022
Israel A. Englander 3730711 5.2 % 17/02/2022
Israel A. Englander 3730711 5.2 % 17/02/2022
Millennium Group Management LLC 3730711 5.2 % 17/02/2022
Millennium Management LLC 3730711 5.2 % 17/02/2022
The Vanguard Group Pennsylvania For 0 110230 3446785 160646 3607431 5.02 % 10/02/2022
Wellington Management Group LLP Massachusetts 0 4505340 0 5017078 5017078 6.98 % 04/02/2022
Wellington Management Company LLP Delaware 0 4505340 0 4827584 4827584 6.71 % 04/02/2022
Wellington Investment Advisors Holdings LLP Delaware 0 4505340 0 5017078 5017078 6.98 % 04/02/2022
Wellington Group Holdings LLP Delaware 0 4505340 0 5017078 5017078 6.98 % 04/02/2022
BlackRock, Inc. Delaware 7401432 0 7479229 0 7479229 10.4 % 27/01/2022
BlackRock, Inc. Delaware 7421149 0 7479229 0 7479229 10.4 % 26/01/2022
N/A Curacao 0 4135000 0 4135000 4135000 5.8 % 15/09/2021
N/A Curacao 0 4135000 0 4135000 4135000 5.8 % 15/09/2021
BB Biotech AG Switzerland 0 4135000 0 4135000 4135000 5.8 % 15/09/2021
BB Biotech AG Switzerland 0 4135000 0 4135000 4135000 5.8 % 15/09/2021
BVF Inc. Delaware 0 0 0 0 0 0 % 11/02/2021
Mark N. Lampert United States 0 0 0 0 0 0 % 11/02/2021
Biotechnology Value Fund II, L.P. Delaware 0 0 0 0 0 0 % 11/02/2021
BVF II GP LLC Delaware 0 0 0 0 0 0 % 11/02/2021
Biotechnology Value Trading Fund OS LP Cayman Islands 0 0 0 0 0 0 % 11/02/2021
BVF Partners OS Ltd. Cayman Islands 0 0 0 0 0 0 % 11/02/2021
BVF GP HOLDINGS LLC Delaware 0 0 0 0 0 0 % 11/02/2021
Biotechnology Value Fund, L.P. Delaware 0 0 0 0 0 0 % 11/02/2021
Mark N. Lampert United States 0 0 0 0 0 0 % 11/02/2021
BVF I GP LLC Delaware 0 0 0 0 0 0 % 11/02/2021
Biotechnology Value Fund, L.P. Delaware 0 0 0 0 0 0 % 11/02/2021
BVF I GP LLC Delaware 0 0 0 0 0 0 % 11/02/2021
Biotechnology Value Fund II, L.P. Delaware 0 0 0 0 0 0 % 11/02/2021
BVF II GP LLC Delaware 0 0 0 0 0 0 % 11/02/2021
Biotechnology Value Trading Fund OS LP Cayman Islands 0 0 0 0 0 0 % 11/02/2021
BVF Partners OS Ltd. Cayman Islands 0 0 0 0 0 0 % 11/02/2021
BVF GP HOLDINGS LLC Delaware 0 0 0 0 0 0 % 11/02/2021
BVF Partners L.P. Delaware 0 0 0 0 0 0 % 11/02/2021
BVF Partners L.P. Delaware 0 0 0 0 0 0 % 11/02/2021
BVF Inc. Delaware 0 0 0 0 0 0 % 11/02/2021
Wellington Investment Advisors Holdings LLP Delaware 0 4271860 0 4653066 4653066 6.79 % 04/02/2021
Wellington Management Company LLP Delaware 0 4204974 0 4390962 4390962 6.41 % 04/02/2021
Wellington Management Group LLP Massachusetts 0 4271860 0 4653066 4653066 6.79 % 04/02/2021
Wellington Group Holdings LLP Delaware 0 4271860 0 4653066 4653066 6.79 % 04/02/2021
BlackRock, Inc. Delaware 7939271 0 7987812 0 7987812 11.7 % 26/01/2021
Sarissa Capital Management LP Delaware 3770000 0 3770000 0 3770000 5.5 % 25/01/2021
Sarissa Capital Management LP Delaware 3770000 0 3770000 0 3770000 5.5 % 25/01/2021
Alexander J. Denner, Ph.D. United States 0 3770000 0 3770000 3770000 5.5 % 25/01/2021
Alexander J. Denner, Ph.D. United States 0 3770000 0 3770000 3770000 5.5 % 25/01/2021
BlackRock, Inc. Delaware 7080126 0 7137740 0 7137740 10.7 % 10/07/2020
ArrowMark Colorado Holdings, LLC Delaware, United States 0 0 0 0 0 0 % 14/02/2020
BVF II GP LLC Delaware 0 1479018 0 1479018 1479018 3 % 14/02/2020
Biotechnology Value Fund, L.P. Delaware 0 1899294 0 1899294 1899294 3.9 % 14/02/2020
BVF I GP LLC Delaware 0 1899294 0 1899294 1899294 3.9 % 14/02/2020
Biotechnology Value Fund II, L.P. Delaware 0 1479018 0 1479018 1479018 3 % 14/02/2020
Biotechnology Value Trading Fund OS LP Cayman Islands 0 259720 0 259720 259720 0 % 14/02/2020
BVF Partners OS Ltd. Cayman Islands 0 259720 0 259720 259720 0 % 14/02/2020
BVF GP HOLDINGS LLC Delaware 0 3378312 0 3378312 3378312 6.7 % 14/02/2020
BVF Partners L.P. Delaware 0 3755553 0 3755553 3755553 7.4 % 14/02/2020
BVF Inc. Delaware 0 3755553 0 3755553 3755553 7.4 % 14/02/2020
Mark N. Lampert United States 0 3755553 0 3755553 3755553 7.4 % 14/02/2020
BlackRock, Inc. Delaware 2414044 0 2465319 0 2465319 5.1 % 07/02/2020
VHCP Management III, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Holdings III, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Venrock Healthcare Capital Partners III, L.P. Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Holdings II, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Venrock Healthcare Capital Partners II, L.P. Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Shah, Nimish United States 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Koh, Bong United States 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Koh, Bong United States 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Shah, Nimish United States 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Management III, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Management II, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Venrock Healthcare Capital Partners II, L.P. Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Holdings II, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Venrock Healthcare Capital Partners III, L.P. Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Management II, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
VHCP Holdings III, LLC Delaware 0 2483903 0 2483903 2483903 5.2 % 20/12/2019
Biotechnology Value Fund, L.P. Delaware 0 2431186 0 2431186 2431186 5.1 % 09/10/2019
Biotechnology Value Fund II, L.P. Delaware 0 1978536 0 1978536 1978536 4.1 % 09/10/2019
Biotechnology Value Trading Fund OS LP Cayman Islands 0 354219 0 354219 354219 0 % 09/10/2019
BVF Partners OS Ltd. Cayman Islands 0 354219 0 354219 354219 0 % 09/10/2019
BVF Partners L.P. Delaware 0 4926419 0 4926419 4926419 10.3 % 09/10/2019
BVF Inc. Delaware 0 4926419 0 4926419 4926419 10.3 % 09/10/2019
Mark N. Lampert United States 0 4926419 0 4926419 4926419 10.3 % 09/10/2019
Mark N. Lampert United States 0 4926419 0 4926419 4926419 10.3 % 09/10/2019
BVF Inc. Delaware 0 4926419 0 4926419 4926419 10.3 % 09/10/2019
BVF Partners L.P. Delaware 0 4926419 0 4926419 4926419 10.3 % 09/10/2019
BVF Partners OS Ltd. Cayman Islands 0 354219 0 354219 354219 0 % 09/10/2019
Biotechnology Value Trading Fund OS LP Cayman Islands 0 354219 0 354219 354219 0 % 09/10/2019
Biotechnology Value Fund II, L.P. Delaware 0 1978536 0 1978536 1978536 4.1 % 09/10/2019
Biotechnology Value Fund, L.P. Delaware 0 2431186 0 2431186 2431186 5.1 % 09/10/2019
Biotechnology Value Fund, L.P. Delaware 0 1199689 0 1199689 1199689 2.5 % 11/03/2019
Mark N. Lampert United States 0 2500000 0 2500000 2500000 5.2 % 11/03/2019
BVF Inc. Delaware 0 2500000 0 2500000 2500000 5.2 % 11/03/2019
BVF Partners L.P. Delaware 0 2500000 0 2500000 2500000 5.2 % 11/03/2019
BVF Partners OS Ltd. Cayman Islands 0 173529 0 173529 173529 0 % 11/03/2019
Biotechnology Value Trading Fund OS LP Cayman Islands 0 173529 0 173529 173529 0 % 11/03/2019
Mark N. Lampert United States 0 2500000 0 2500000 2500000 5.2 % 11/03/2019
BVF Inc. Delaware 0 2500000 0 2500000 2500000 5.2 % 11/03/2019
BVF Partners L.P. Delaware 0 2500000 0 2500000 2500000 5.2 % 11/03/2019
BVF Partners OS Ltd. Cayman Islands 0 173529 0 173529 173529 0 % 11/03/2019
Biotechnology Value Trading Fund OS LP Cayman Islands 0 173529 0 173529 173529 0 % 11/03/2019
Biotechnology Value Fund II, L.P. Delaware 0 991416 0 991416 991416 2.1 % 11/03/2019
Biotechnology Value Fund, L.P. Delaware 0 1199689 0 1199689 1199689 2.5 % 11/03/2019
Biotechnology Value Fund II, L.P. Delaware 0 991416 0 991416 991416 2.1 % 11/03/2019
Sarissa Capital Management LP Delaware 0 3750000 0 3750000 3750000 7.9 % 11/03/2019
Alexander J. Denner, Ph.D. United States 0 3750000 0 3750000 3750000 7.9 % 11/03/2019
Sarissa Capital Management LP Delaware 0 3750000 0 3750000 3750000 7.9 % 11/03/2019
Sarissa Capital Catapult Fund LLC Delaware 761000 0 761000 0 761000 1.6 % 11/03/2019
Alexander J. Denner, Ph.D. United States 0 3750000 0 3750000 3750000 7.9 % 11/03/2019
Sarissa Capital Offshore Master Fund LP Cayman Islands 2531000 0 2531000 0 2531000 5.3 % 11/03/2019
Sarissa Capital Catapult Fund LLC Delaware 761000 0 761000 0 761000 1.6 % 11/03/2019
Sarissa Capital Hawkeye Fund LP Delaware 458000 0 458000 0 458000 1 % 11/03/2019
Sarissa Capital Hawkeye Fund LP Delaware 458000 0 458000 0 458000 1 % 11/03/2019
Sarissa Capital Offshore Master Fund LP Cayman Islands 2531000 0 2531000 0 2531000 5.3 % 11/03/2019
Wellington Management Group LLP Massachusetts 0 857916 0 966902 966902 4.17 % 10/01/2019
Wellington Group Holdings LLP Delaware 0 857916 0 966902 966902 4.17 % 10/01/2019
Wellington Investment Advisors Holdings LLP Delaware 0 857916 0 966902 966902 4.17 % 10/01/2019
Wellington Management Group LLP Massachusetts 0 857916 0 966902 966902 4.17 % 10/01/2019
Wellington Group Holdings LLP Delaware 0 857916 0 966902 966902 4.17 % 10/01/2019
Wellington Investment Advisors Holdings LLP Delaware 0 857916 0 966902 966902 4.17 % 10/01/2019
Rho Ventures V Affiliates, L.L.C. Delaware 0 818033 0 818033 818033 3.6 % 09/02/2018
Rho Capital Partners LLC Delaware 0 818033 0 818033 818033 3.6 % 09/02/2018
RMV V, L.L.C. Delaware 0 818033 0 818033 818033 3.6 % 09/02/2018
Pinnacle Investment Partners “Q6”, L.P. Delaware 0 422871 0 422871 422871 1.9 % 09/02/2018
Pinnacle Management Partners LLC Delaware 0 422871 0 422871 422871 1.9 % 09/02/2018
RUGU Partners LLC Delaware 0 422871 0 422871 422871 1.9 % 09/02/2018
Kariba LLC United States America 90283 0 90283 0 90283 0 % 09/02/2018
Joshua Ruch United States America 90283 1240904 90283 1240904 1331187 5.9 % 09/02/2018
Mark Leschly Kingdom Denmark 0 818033 0 818033 818033 3.6 % 09/02/2018
Habib Kairouz United States America 0 818033 0 818033 818033 3.6 % 09/02/2018
Rho Ventures V, L.P. Delaware 0 818033 0 818033 818033 3.6 % 09/02/2018
Wellington Management Group LLP Massachusetts 0 2243473 0 2418324 2418324 10.63 % 08/02/2018
Wellington Management Group LLP Massachusetts 0 2243473 0 2418324 2418324 10.63 % 08/02/2018
Wellington Management Company LLP Delaware 0 2243473 0 2343973 2343973 10.3 % 08/02/2018
Wellington Investment Advisors Holdings LLP Delaware 0 2243473 0 2418324 2418324 10.63 % 08/02/2018
Wellington Management Company LLP Delaware 0 2243473 0 2343973 2343973 10.3 % 08/02/2018
Wellington Investment Advisors Holdings LLP Delaware 0 2243473 0 2418324 2418324 10.63 % 08/02/2018
Wellington Group Holdings LLP Delaware 0 2243473 0 2418324 2418324 10.63 % 08/02/2018
Wellington Group Holdings LLP Delaware 0 2243473 0 2418324 2418324 10.63 % 08/02/2018
Wellington Group Holdings LLP Delaware 0 2194434 0 2369285 2369285 10.46 % 10/08/2017
Wellington Management Company LLP Delaware 0 2194434 0 2294934 2294934 10.13 % 10/08/2017
Wellington Investment Advisors Holdings LLP Delaware 0 2194434 0 2369285 2369285 10.46 % 10/08/2017
Wellington Group Holdings LLP Delaware 0 2194434 0 2369285 2369285 10.46 % 10/08/2017
Wellington Management Group LLP Massachusetts 0 2194434 0 2369285 2369285 10.46 % 10/08/2017
Wellington Management Group LLP Massachusetts 0 2194434 0 2369285 2369285 10.46 % 10/08/2017
Wellington Management Company LLP Delaware 0 2194434 0 2294934 2294934 10.13 % 10/08/2017
Wellington Investment Advisors Holdings LLP Delaware 0 2194434 0 2369285 2369285 10.46 % 10/08/2017
PFIZER INC. Delaware 2232221 0 2232221 0 2232221 9.8 % 13/07/2017
Rock Springs Capital Master Fund LP Cayman Islands 0 1527893 0 1527893 0 6.8 % 07/07/2017
Rock Springs Capital Master Fund LP Cayman Islands 0 1527893 0 1527893 0 6.8 % 07/07/2017
Rock Springs Capital Management LP Delaware 0 1527893 0 1527893 0 6.8 % 07/07/2017
Rock Springs Capital Management LP Delaware 0 1527893 0 1527893 0 6.8 % 07/07/2017
FMR LLC Delaware 1130016 0 1735061 0 1735061 7.661 % 06/07/2017
Abigail P. Johnson United States of America 0 0 1735061 0 1735061 7.661 % 06/07/2017
FMR LLC Delaware 1130016 0 1735061 0 1735061 7.661 % 06/07/2017
Abigail P. Johnson United States of America 0 0 1735061 0 1735061 7.661 % 06/07/2017

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