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Boundless Bio, Inc.

For the period ended Dec 31, 2025. Filed Mar 9, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 9, 2026

BOLD$2.460.0%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

Item 16. Form 10-K Summary

None.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Boundless Bio, Inc.
Date: March 9, 2026By:/s/ Zachary D. Hornby
Zachary D. Hornby
President and Chief Executive Officer
(Principal Executive Officer)
Date: March 9, 2026By:/s/ David Hinkle
David Hinkle
Senior Vice President, Finance, Controller and Treasurer
(Principal Financial and Accounting Officer)
ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.