MBX Biosciences, Inc.: director Peter Radovich received 18,200 shares

What happened

• Peter Radovich, director, received a grant (derivative award/option) for 18,200 shares of MBX Biosciences on Oct 20, 2026, at a price of $0.00. The Form 4 was filed on Oct 22, 2026.

Key details

• Transaction date and type: Oct 20, 2026 — Grant/Acquisition (code A); 18,200 shares; $0.00 per share.
• Filing date: Oct 22, 2026 (accession 0001193125-26-428390).
• Shares owned after the transaction: not reported in this filing.
• Footnote F1 (vesting): 1/3 of the shares underlying this option will vest and become exercisable on Oct 20, 2027, the anniversary of the date of grant, with the remainder vesting monthly over the subsequent 2 year period, subject to the reporting person's continued service on each such vesting date.

Why it may matter

• This filing documents a time‑based derivative award (option) that vests over a multi‑year schedule; it is not a market sale or purchase.
• A filing does not show why the insider traded or why the company acted.