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XBiotech Inc.

For the period ended Dec 31, 2025. Filed Mar 13, 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 13, 2026

XBIT$1.91+1.1%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

ITEM 16.FORM 10–K SUMMARY

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on March 13, 2026.

XBIOTECH INC.,
/s/ SUSHMA SHIVASWAMY
Name:Sushma Shivaswamy
Title:Chief Executive Officer
(Principal Executive Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature and TitleDate
/s/ SUSHMA SHIVASWAMY Sushma Shivaswamy, Chief Executive Officer (Principal Executive Officer)March 13, 2026
/s/ ANGELA HU Angela Hu, Principal Financial Officer and Principal Accounting OfficerMarch 13, 2026
/s/ JOHN SIMARD John Simard, Chairman of the BoardMarch 13, 2026
/s/ THOMAS KUENDIG Thomas Kuendig, DirectorMarch 13, 2026
/s/ CRAIG RADEMAKER Craig Rademaker, DirectorMarch 13, 2026
/s/ TEVI TROY Tevi Troy, DirectorMarch 13, 2026
/s/ DAVID SOFFER David Soffer, DirectorMarch 13, 2026
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