Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0001104659-26-051889
Filing Date
2026-04-29
Accepted
2026-04-29 19:21:02
Documents
1
Period of Report
2026-04-28

Document Format Files

Seq Description Document Type Size
1 OWNERSHIP DOCUMENT tm2613154-1_4seq1.html 4  
1 OWNERSHIP DOCUMENT tm2613154-1_4seq1.xml 4 8284
  Complete submission text file 0001104659-26-051889.txt   9834
Mailing Address C/O TESARO, INC. 1000 WINTER STREET, SUITE 3300 WALTHAM MA 02451
Business Address
MOULDER LEON O JR (Reporting) CIK: 0001228865 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-42270 | Film No.: 26919100

Mailing Address 852 WINTER STREET, SUITE 250 WALTHAM MA 02451
Business Address 852 WINTER STREET, SUITE 250 WALTHAM MA 02451 857-271-2954
Zenas BioPharma, Inc. (Issuer) CIK: 0001953926 (see all company filings)

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