---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-24-007128"
form_type: "8-K"
ticker: "XBIT"
cik: "0001626878"
company_name: "XBiotech Inc."
filed_at: "2024-12-31T23:59:59+00:00"
generated_at: "2026-05-28T21:49:19.723315+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# XBiotech appoints renowned immunologist Dr. Tak W. Mak to its Board of Directors

## Summary
- Dr. Mak appointed December 24, 2024 to fill board vacancy; will serve until next annual meeting.
- Dr. Mak is a professor at University of Toronto, cloned T cell receptor (1984), and identified immune checkpoint CTLA-4.
- He co-founded Agios Pharmaceuticals, which developed multiple FDA-approved cancer treatments.
- Audit Committee remains two independent directors (McKenzie, Waldin); vacancy to be filled per Nasdaq rules.

## SEC filing metadata
- accession: 0001171843-24-007128
- form_type: 8-K
- ticker: XBIT
- cik: 0001626878
- company_name: XBiotech Inc.
- filed_at: 2024-12-31T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1626878/000117184324007128/0001171843-24-007128-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1626878/000117184324007128/f8k_123124.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-24-007128
- JSON: https://secwatch.observer/filing/0001171843-24-007128.json
- Plain text: https://secwatch.observer/filing/0001171843-24-007128.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.