Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000950170-25-037621
Filing Date
2025-03-12
Accepted
2025-03-12 07:10:34
Documents
119
Period of Report
2024-12-31

Document Format Files

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  Complete submission text file 0000950170-25-037621.txt   54327768

Data Files

Seq Description Document Type Size
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Mailing Address 890 WINTER STREET, SUITE 200 WALTHAM MA 02451
Business Address 890 WINTER STREET, SUITE 200 WALTHAM MA 02451 781-208-2466
Upstream Bio, Inc. (Filer) CIK: 0002022626 (see all company filings)

EIN.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-42366 | Film No.: 25729978
SIC: 2834 Pharmaceutical Preparations
(CF Office: 03 Life Sciences)