Steven L. Hoerter - Nov 6, 2025 Form 4 Insider Report for MBX Biosciences, Inc. (MBX)

Role
Director
Signature
/s/ Richard Bartram, attorney-in-fact
Stock symbol
MBX
Transactions as of
Nov 6, 2025
Transactions value $
$0
Form type
4
Date filed
11/7/2025, 08:20 AM
Previous filing
Oct 20, 2025
Next filing
Nov 25, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Hoerter Steven L. Director C/O MBX BIOSCIENCES INC., 11711 N. MERIDIAN STREET, SUITE 300, CARMEL /s/ Richard Bartram, attorney-in-fact 2025-11-07 0001533451

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MBX Stock option (right to buy) Award $0 +100K $0.00 100K Nov 6, 2025 Common Stock 100K $24.74 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The grant will vest in equal monthly installments over a one-year period from the date of grant, subject to the non-employee director's continued services to the Company.