UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _______________________________________________________________ FORM 10-K _______________________________________________________________ ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 ☐ Transaction Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-37437 ______________________________________________ ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 001-37437 XBIOTECH INC. (Exact name of registrant as specified in charter) British Columbia, Canada ____ (State or other jurisdiction of incorporation or organization) (IRS ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 001-37437 XBIOTECH INC. (Exact name of registrant as specified in charter) British Columbia, Canada __ (State or other jurisdiction of incorporation or organization) (IRS Employe ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 001-37437 XBIOTECH INC. (Exact name of registrant as specified in charter) British Columbia, Canada __ (State or other jurisdiction of incorporation or organization) (IRS Employ ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ________________________________________________ FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 ☐ Transaction Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number 001-37437 ________________________________________________ XBIOTECH INC. (Exact name of Registrant as specified in its charter) British ...