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MBX Biosciences, Inc.

For the period ended Dec 31, 2025. Filed Mar 12, 2026.

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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 12, 2026

MBX$54.06+5.3%Stored close · as of Nov 9, 2026

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

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Contents

Item 9B. Other Information

(a) None.

(b) Trading Plans

During the three months ended December 31, 2025, none of our directors or officers (as defined in Rule 16a-1(f) of the Exchange Act) adopted or terminated any Rule 10b5-1 trading arrangements (as defined in Item 408(a) of Regulation S-K), except as follows:

NameTitleReporting ActionPlan Start DatePlan End DateMaximum number of Shares of Common Stock to be SoldIntended to Satisfy Rule 10b5-1(c)?
Richard BartramChief Financial OfficerPlan AdoptionDecember 19, 2025March 15, 2027121,485Yes
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.