0000950170-24-107532.txt : 20240917 0000950170-24-107532.hdr.sgml : 20240917 20240917201102 ACCESSION NUMBER: 0000950170-24-107532 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240916 FILED AS OF DATE: 20240917 DATE AS OF CHANGE: 20240917 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: CORNELIUS JAMES M CENTRAL INDEX KEY: 0001198959 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-42272 FILM NUMBER: 241305897 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MBX Biosciences, Inc. CENTRAL INDEX KEY: 0001776111 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 12406 HORESHAM STREET CITY: CARMEL STATE: IN ZIP: 46032 BUSINESS PHONE: 3179893100 MAIL ADDRESS: STREET 1: 12406 HORESHAM STREET CITY: CARMEL STATE: IN ZIP: 46032 4 1 ownership.xml 4 X0508 4 2024-09-16 false 0001776111 MBX Biosciences, Inc. MBX 0001198959 CORNELIUS JAMES M C/O MBX BIOSCIENCES, INC. 11711 N. MERIDIAN STREET, SUITE 300 CARMEL IN 46032 true false false false false Common Stock 2024-09-16 4 C false 102082 A 102082 D Series A Convertible Preferred Stock 2024-09-16 4 C false 994069 D Common Stock 82686 0 D Series B Convertible Preferred Stock 2024-09-16 4 C false 233192 D Common Stock 19396 0 D Each share of Series A Convertible Preferred Stock and Series B Convertible Preferred Stock (together, the "Preferred Stock") was convertible into Common Stock on a one-for-12.0221 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on September 16, 2024. The Preferred Stock had no expiration date. /s/ Richard Bartram, attorney-in-fact 2024-09-17