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  1. Companies/
  2. Upstream Bio, Inc.

Filings through Oct 24, 2026.

Sponsor portfolio

Upstream Bio, Inc.

EIN 38-4187694-biotechnology-Latest filing 2025
Plans
1
Retirement
1
$4.8M assets
Welfare
0
Participants
74
890 WINTER STREET, SUITE 200 - WALTHAM, MA 02154978-835-8608upstreambio.comLinkedIn11-50 employeesbiotechnology
Plans on this EIN
1 filing
#001401(k)-$4.8M - 74 part

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Retirement#001

UPSTREAM BIO, INC.

401(k)

Assets$4.8M
Participants74
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Fees vs peersAudit gradeAsset trajectoryContributionsSch C providers
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Retirement plans1

Plan #NameTypeAssetsParticipantsLatest year
001UPSTREAM BIO, INC.401(k)$4.8M742025
Retirement plans
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