MBX Biosciences (MBX) Proxy filing summary

Voting matters and shareholder proposals

• Election of two Class II Directors, Patrick J. Heron and Edward T. Mathers, to serve until the 2029 Annual Meeting or until successors are elected and qualified.

• Ratification of Ernst & Young LLP as independent registered public accounting firm for the fiscal year ending December 31, 2026.

• Additional business may be addressed if properly brought before the meeting or any adjournment.

Board of directors and corporate governance

• Board recommends voting in favor of both director nominees and the auditor ratification.

Audit committee and external auditor matters

• Proposal to ratify Ernst & Young LLP as the external auditor for the upcoming fiscal year.