Upstream Bio Inc

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Upstream Bio Inc
TickerUPB
CIK #0002022626
CUSIP91678A107
SectorLife Sciences - Pharmaceutical Preparations
Address890 Winter Street, Suite 200, Waltham, MA 02451
Source [EDGAR]
CIK Filing 2011 - 2025
[0002022626] 10-K
[0002022626] 10-Q
[0002022626] 3
[0002022626] 4
[0002022626] 8-K
[0002022626] SC 13D
[0002022626] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Decheng Capital Global Life Sciences Fund IV LP Upstream Bio Inc [2025-02-14] 0.0
TCG Crossover GP I LLC Upstream Bio Inc [2025-02-14] 0.0
HBM Healthcare Investments Cayman Ltd Upstream Bio Inc [2025-02-13] 0.0
FMR LLC Upstream Bio Inc [2024-11-07] 0.0
AI Upstream LLC Upstream Bio Inc [2024-10-22] 819410.7
BCLS Fund III Investments LP Upstream Bio Inc [2024-10-18] 81944.3
OrbiMed Advisors LLC Upstream Bio Inc [2024-10-17] 8.9
Form 3/4/5 Filer 2011 - 2025
Chimovits Erez
Upstream Bio, Inc.
Ratcliffe Liam
Ruddy Marcella K.
Beckman Daniella
Renaud Ronald C JR
Fleming Harold Edward
Ambrose Allison
Houghton Adam
Deykin Aaron
Sutherland Everett Rand
Gray Michael
OrbiMed Advisors Israel II Ltd
OrbiMed Advisors LLC
OrbiMed Israel GP II, L.P.
OrbiMed Capital GP VIII LLC
Access Industries Management LLC
AI Upstream LLC
Blavatnik Len
Access Industries Holdings LLC
AI Biotechnology LLC
Wellington Biomedical Innovation Master Investors (Cayman) I
Form 13F Holdings
Firm Period DFND Voting Shares
FMR LLC [2025-06-30] DFND 7,935,525 7,936,880
OrbiMed Advisors LLC [2025-06-30] SOLE 5,693,589 5,693,589
Altshuler Shaham Ltd [2025-06-30] DFND 3,394,441 3,394,441
Decheng Capital LLC [2025-06-30] SOLE 3,285,293 3,285,293
TCG Crossover Management LLC [2025-06-30] SOLE 2,801,763 2,801,763
Enavate Sciences GP, LLC [2025-06-30] SOLE 2,459,703 2,459,703
Bain Capital Life Sciences Investors, LLC [2025-06-30] SOLE 2,439,538 2,439,538
VR Adviser LLC [2025-06-30] SOLE 2,295,319 2,295,319
Vanguard Group Inc [2025-06-30] SOLE 0 2,149,375
BlackRock, Inc. [2025-06-30] SOLE 2,025,369 2,096,506
Omega Fund Management LLC [2025-06-30] SOLE 2,036,293 2,036,293
Samsara Biocapital LLC [2025-06-30] SOLE 1,443,231 1,443,231
Deep Track Capital LP [2025-06-30] SOLE 1,442,767 1,442,767
Wellington Management Group LLP [2025-06-30] DFND 0 1,225,295
Norges Bank [2025-06-30] SOLE 969,916 969,916
Siren, L.L.C. [2025-06-30] DFND 788,450 788,450
Parkman Healthcare Partners LLC [2025-06-30] SOLE 715,504 715,504
Geode Capital Management LLC [2025-06-30] DFND 646,635 646,635
Nantahala Capital Management LLC [2025-06-30] SOLE 594,971 594,971
Woodline Partners LP [2025-06-30] SOLE 558,252 558,252
State Street Corp [2025-06-30] DFND 432,275 481,375
Schonfeld Strategic Advisors LLC [2025-06-30] SOLE 365,790 365,790
Great Point Partners LLC [2025-06-30] SOLE 0 300,000
Marshall Wace LLP [2025-06-30] OTR 0 290,526
UBS Group AG [2025-06-30] DFND 232,887 232,887
Northern Trust Corp [2025-06-30] DFND 223,977 223,977
Lynx1 Capital Management LP [2025-06-30] OTR 0 219,247
Charles Schwab Investment Management Inc [2025-06-30] SOLE 178,253 178,253
Velan Capital Investment Management LP [2025-06-30] SOLE 107,000 107,000
Morgan Stanley [2025-06-30] DFND 99,167 99,308
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