---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-082697"
form_type: "8-K"
ticker: "MBX"
cik: "0001776111"
company_name: "MBX Biosciences, Inc."
filed_at: "2025-06-06T23:59:59+00:00"
generated_at: "2026-05-19T18:30:08.151033+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# MBX Biosciences elects Tiba Aynechi and Kent Hawryluk as Class I directors; Carl Gordon departs board

## Summary
- Stockholders elected Tiba Aynechi (24.3M for) and P. Kent Hawryluk (24.4M for) to three-year terms ending 2028.
- Carl L. Gordon, Ph.D., CFA departed the board effective June 5, 2025; his term ended at the annual meeting.
- Ratification of Ernst & Young as independent auditor for FY2025 passed with 27.8M for, 3,467 against.
- Annual meeting held June 5, 2025; 33.4M shares outstanding as of April 11 record date.

## SEC filing metadata
- accession: 0000950170-25-082697
- form_type: 8-K
- ticker: MBX
- cik: 0001776111
- company_name: MBX Biosciences, Inc.
- filed_at: 2025-06-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02, 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1776111/000095017025082697/0000950170-25-082697-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1776111/000095017025082697/mbx-20250605.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-082697
- JSON: https://secwatch.observer/filing/0000950170-25-082697.json
- Plain text: https://secwatch.observer/filing/0000950170-25-082697.txt

## Key facts
- Executive change
  Carl L. Gordon departed as Director at MBX Biosciences, Inc..
  - Action: departed
  - Role: Director
  source text: Also effective as of June 5, 2025 was the departure of Carl L. Gordon, Ph.D., CFA from the Company's board of directors.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1776111/000095017025082697/0000950170-25-082697-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.