Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0000950170-25-015740
Filing Date
2025-02-06
Accepted
2025-02-06 21:02:11
Documents
2
Period of Report
2025-02-06

Document Format Files

Seq Description Document Type Size
1 3 ownership.html 3  
1 3 ownership.xml 3 4055
2 EX-24 ck0002036042-ex24.htm EX-24 12816
  Complete submission text file 0000950170-25-015740.txt   18291
Mailing Address C/O BIOGEN IDEC INC. 14 CAMBRIDGE CENTER CAMBRIDGE MA 02142
Business Address
Clancy Paul J (Reporting) CIK: 0001409601 (see all company filings)

Type: 3 | Act: 34 | File No.: 001-42504 | Film No.: 25598974

Mailing Address 21 HICKORY DRIVE, SUITE 500 WALTHAM MA 02451
Business Address 21 HICKORY DRIVE, SUITE 500 WALTHAM MA 02451 617-819-2020
Sionna Therapeutics, Inc. (Issuer) CIK: 0002036042 (see all company filings)

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