Form 8-K - Current report:
SEC Accession No. 0000950170-25-085374
Filing Date
2025-06-12
Accepted
2025-06-12 16:18:05
Documents
10
Period of Report
2025-06-10
Items
Item 5.07: Submission of Matters to a Vote of Security Holders

Document Format Files

Seq Description Document Type Size
1 8-K upb-20250610.htm   iXBRL 8-K 64364
  Complete submission text file 0000950170-25-085374.txt   177706

Data Files

Seq Description Document Type Size
2 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT upb-20250610.xsd EX-101.SCH 26961
12 EXTRACTED XBRL INSTANCE DOCUMENT upb-20250610_htm.xml XML 5106
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: 8-K | Act: 34 | File No.: 001-42366 | Film No.: 251042743
SIC: 2834 Pharmaceutical Preparations
(CF Office: 03 Life Sciences)