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CIK 0001776111 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company

MBX Biosciences, Inc.

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Ticker
MBX
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
Phone
3179893100
Business address
11711 N. MERIDIAN STREET, SUITE 300, CARMEL, IN, 46032
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$288,361
in 2 filings

Net −$288,361. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Date Insider Transaction Shares Price Value Owned after
2024-09-16 Aynechi Tiba Director Conversion +1,386,335 1,386,335
2024-09-16 Aynechi Tiba Director Purchase +750,000 $16.00 $12.0M 2,136,335
2024-09-16 Aynechi Tiba Director Conversion · Series B Convertible Preferred Stock −16,666,666 0
2024-09-16 GORDON CARL L Director Conversion +2,658,428 2,658,428
2024-09-16 GORDON CARL L Director Conversion +403,787 403,787
2024-09-16 GORDON CARL L Director Purchase +500,000 $16.00 $8.0M 3,158,428
2024-09-16 GORDON CARL L Director Purchase +250,000 $16.00 $4.0M 653,787
2024-09-16 GORDON CARL L Director Conversion · Series A Convertible Preferred Stock −12,372,634 0
2024-09-16 GORDON CARL L Director Conversion · Series B Convertible Preferred Stock −19,587,284 0
2024-09-16 GORDON CARL L Director Conversion · Series C Convertible Preferred Stock −4,854,368 0
2024-09-16 Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 10% owner Conversion +1,386,335 1,386,335
2024-09-16 Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 10% owner Conversion +403,787 1,790,122
2024-09-16 Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 10% owner Conversion · Series B Preferred Stock −16,666,666 0
2024-09-16 Wellington Biomedical Innovation Master Investors (Cayman) II L.P. 10% owner Conversion · Series C Preferred Stock −4,854,368 0
2024-09-12 GORDON CARL L Director Grant or award · Stock Option (Right to Buy) +15,963 15,963
2024-09-12 Ryder Steven Director Grant or award · Stock Option (Right to Buy) +15,963 15,963
2024-09-12 Bartram Richard Chief Financial Officer Grant or award · Stock Option (Right to Buy) +42,578 42,578
2024-09-12 Azoulay Salomon Chief Medical Officer Grant or award · Stock Option (Right to Buy) +45,011 45,011
2024-09-12 Mathers Edward T Director Grant or award · Stock Option (Right to Buy) +15,963 15,963
2024-09-12 Hawryluk P. Kent President & CEO Grant or award · Stock Option (Right to Buy) +120,436 120,436

Page 8 of 9 · 164 trades