SEC Form 4 · accession 0001193125-26-258429
MBX Biosciences, Inc. · MBX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Steven L. Hoerter
Director
Period of report
Jun 4, 2026
Accepted (ET)
Jun 5, 2026 · 7:57 am EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001776111
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | holding | — | — | — | 11,938 | D | ||
| Common StockF1 | holding | — | — | — | 20,000 | I | Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock option (right to buy)F2 | $30.91 | Jun 4, 2026 | A | 12,500 | A | — | Jun 4, 2036 | Common Stock | 12,500 | 12,500 | D |
Explanation of responses
- F1Shares held by the Steven L Hoerter Revocable Trust dated November 2, 2018, of which the Reporting Person serves as trustee. The Reporting Person disclaims beneficial ownership except to the extent of any pecuniary interest therein, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose.
- F2The grant will vest in full on the earlier of the one-year anniversary of the grant date or on the date of our next annual meeting of stockholders, subject to the non-employee director's continued services to the Company.