Mbx Biosciences (MBX): Chief Medical Officer sold ~$20K

~$20K

Approx. value · 373 sh @ $53.96

14K

Holds after · shares reported

Traded

Nov 4, 2026

Filed

Nov 5, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Oct 20, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“Effective as of October 20, 2026, the board of directors (the “Board”) of MBX Biosciences, Inc. (the “Company”), upon the recommendation of the Nominating and Corporate Governance Committee of the Board (the “NCG Committee”), appointed Peter Radovich as a director of the Company.”
2. Nov 4, 2026 · this disclosureInsiderOfficer sold ~$20K of MBX shares in the open market

What came next

1. Nov 5, 20265% stakeFMR LLC reported a passive stake (13G) of 15.0%
2. Nov 9, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
3. Nov 10, 2026InsiderCEO sold ~$268K of MBX shares in the open market

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Mbx Biosciences

For Mbx Biosciences, OQRO holds 4 insider filings (SEC Form 4 or Form 144) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its MBX page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Mbx Biosciences

• SEC Form 4Nov 12, 2026
• SEC Form 144Nov 10, 2026
• SEC Form 144Nov 4, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its MBX page.