Richard Bartram - 03 Feb 2025 Form 4 Insider Report for MBX Biosciences, Inc. (MBX)

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	+95,000		$0.000000	95,000	03 Feb 2025	Common Stock	95,000	$10.49	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Id	Content
F1	25% of the shares underlying this option vest and become exercisable on February 3, 2026, with the remaining 75% vesting in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continued service on such vesting date.