Form S-8 - Securities to be offered to employees in employee benefit plans:
SEC Accession No. 0000950170-25-037623
Filing Date
2025-03-12
Accepted
2025-03-12 07:15:34
Documents
4
Effectiveness Date
2025-03-12

Document Format Files

Seq Description Document Type Size
1 S-8 upb_s-8_2025_evergreen.htm S-8 67743
2 EX-5.1 upb-ex5_1.htm EX-5.1 10032
3 EX-23.1 upb-ex23_1.htm EX-23.1 2632
4 EX-FILING FEES upb-exfiling_fees.htm EX-FILING FEES 22549
  Complete submission text file 0000950170-25-037623.txt   103980
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: S-8 | Act: 33 | File No.: 333-285729 | Film No.: 25729981
SIC: 2834 Pharmaceutical Preparations
(CF Office: 03 Life Sciences)