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BBNX 424B5: Secondary offering

Beta Bionics, Inc.

Filed with the SEC on · accession 0001193125-26-392277

BBNX filed a 424B5 (prospectus (offering)) with the SEC on Sep 16, 2026. Beta Bionics, Inc. filed a prospectus supplement for a secondary offering of $125,000,000 of its common stock, with an underwriters' option for an additional $18,750,000. The stock moved +15.3% by the first close after the filing.

Summary of the filing

Beta Bionics, Inc. filed a prospectus supplement for a secondary offering of $125,000,000 of its common stock, with an underwriters' option for an additional $18,750,000. The offering is underwritten by J.P. Morgan, Piper Sandler, Wells Fargo Securities, and Leerink Partners.

For details, click here →How to read a 424B5 →

Key details

Total offering amount$125.0M
Over-allotment option$18.8M
IssuerBeta Bionics, Inc.
Lead underwriterJ.P. Morgan
UnderwriterPiper Sandler
UnderwriterWells Fargo Securities
UnderwriterLeerink Partners

How BBNX stock reacted

Close before

$19.23

Sep 15, 2026

First close after

+15.34%

$22.18

5 trading days

+18.62%

$22.81

Since filing

-18.36%

$15.70

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Frequently asked questions

What did BBNX file with the SEC on Sep 16, 2026?

BBNX filed a 424B5 (Secondary offering). Beta Bionics, Inc. filed a prospectus supplement for a secondary offering of $125,000,000 of its common stock, with an underwriters' option for an additional $18,750,000. The offering is underwritten by J.P. Morgan, Piper Sandler, Wells Fargo Securities, and Leerink Partners.

What does a secondary offering mean for BBNX stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B5?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did BBNX stock react to this filing?

BBNX closed at $19.23 before the filing and $22.18 on Sep 16, 2026 (+15.34%). Five trading days later: $22.81 (+18.62%).

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