Xbiotech Inc.

XBIT·NASDAQ·$2.40Share Price as of 11/2·$73MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/13/26 10-QQ1 ended 03/31/2605/14/26 10-K/AFY 202504/29/26 10-KFY 202503/13/26 10-QQ3 ended 09/30/2511/12/25

Disclosures

8-KCurrent report10/26/26 8-KCurrent report12/09/25 8-K/ACurrent report (amended)10/15/25 8-KCurrent report10/03/25 8-KCurrent report09/02/25

Prospectuses and Registrations

S-8Registration of securities for employees03/11/26 S-8Registration of securities for employees10/02/20 424B5Prospectus supplement06/03/19 424B5Prospectus supplement05/31/19 S-3MEFProspectus / registration05/31/19

Proxies

DEF 14ADefinitive proxy10/02/26 DEF 14ADefinitive proxy07/07/25 DEF 14ADefinitive proxy05/01/24 DEFA14AAdditional proxy materials05/01/24 DEF 14ADefinitive proxy04/28/23

Ownership

Form 3Initial insider ownership10/28/26 Form 4Insider transaction10/28/26 Form 4Insider transaction10/28/26 SC 13G/ABeneficial ownership (amended)01/23/26 SC 13G/ABeneficial ownership (amended)01/23/26

Other

ARSAnnual report to shareholders10/02/26 ARSAnnual report to shareholders07/07/25 ARSAnnual report to shareholders05/01/24 SC TO-I/ASC TO-I/A06/20/23 SC TO-IIssuer tender offer05/17/23