4//SEC Filing
Topper James N 4
Accession 0001231919-25-000267
CIK 0001776111other
Filed
Sep 29, 8:00 PM ET
Accepted
Sep 30, 4:59 PM ET
Size
12.1 KB
Accession
0001231919-25-000267
Insider Transaction Report
Form 4
Topper James N
10% Owner
Transactions
- Purchase
Common Stock
2025-09-26$18.00/sh+666,666$11,999,988→ 5,219,440 total(indirect: By Frazier Life Sciences X, L.P.)
Heron Patrick J
Director10% Owner
Transactions
- Purchase
Common Stock
2025-09-26$18.00/sh+666,666$11,999,988→ 5,219,440 total(indirect: By Frazier Life Sciences X, L.P.)
FHMLS X, L.L.C.
10% Owner
Transactions
- Purchase
Common Stock
2025-09-26$18.00/sh+666,666$11,999,988→ 5,219,440 total(indirect: By Frazier Life Sciences X, L.P.)
Frazier Life Sciences X, L.P.
10% Owner
Transactions
- Purchase
Common Stock
2025-09-26$18.00/sh+666,666$11,999,988→ 5,219,440 total(indirect: By Frazier Life Sciences X, L.P.)
FHMLS X, L.P.
10% Owner
Transactions
- Purchase
Common Stock
2025-09-26$18.00/sh+666,666$11,999,988→ 5,219,440 total(indirect: By Frazier Life Sciences X, L.P.)
Footnotes (1)
- [F1]The shares reported herein are held of record by Frazier Life Sciences X, L.P. FHMLS X, L.P. is the general partner of Frazier Life Sciences X, L.P. and FHMLS X, L.L.C. is the general partner of FHMLS X, L.P. James N. Topper and Patrick J. Heron are the sole managing members of FHMLS X, L.L.C. and share voting and investment power over the shares held by Frazier Life Sciences X, L.P. Dr. Topper and Mr. Heron disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.
Documents
Issuer
MBX Biosciences, Inc.
CIK 0001776111
Entity typeother
Related Parties
1- filerCIK 0001341382
Filing Metadata
- Form type
- 4
- Filed
- Sep 29, 8:00 PM ET
- Accepted
- Sep 30, 4:59 PM ET
- Size
- 12.1 KB