Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0000950170-25-085372
Filing Date
2025-06-12
Accepted
2025-06-12 16:17:21
Documents
2
Period of Report
2025-06-10

Document Format Files

Seq Description Document Type Size
1 4 ownership.html 4  
1 4 ownership.xml 4 4301
2 EX-24.2 upb-ex24_2.htm EX-24.2 8103
  Complete submission text file 0000950170-25-085372.txt   13823
Mailing Address C/O CRISPR THERAPEUTICS AG 610 MAIN STREET CAMBRIDGE MA 02139
Business Address
Fleming Harold Edward (Reporting) CIK: 0001857250 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-42366 | Film No.: 251042668

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. (Issuer) CIK: 0002022626 (see all company filings)

EIN.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
SIC: 2834 Pharmaceutical Preparations
(CF Office: 03 Life Sciences)