---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-25-007836"
form_type: "8-K"
ticker: "XBIT"
cik: "0001626878"
company_name: "XBiotech Inc."
filed_at: "2025-12-09T23:59:59+00:00"
generated_at: "2026-05-16T13:47:57.737720+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# XBiotech CEO John Simard retires; CSO Sushma Shivaswamy named interim CEO

## Summary
- John Simard retired as CEO/President effective Dec 8, 2025; continues as Chairman.
- Sushma Shivaswamy, 47, appointed interim CEO effective Dec 8, remains CSO.
- Shivaswamy's base salary increased to $750k while serving in dual roles.
- Simard to provide consulting guidance per existing employment agreement; severance to be paid.
- Board thanks Simard for 21 years; confident in Shivaswamy's leadership during interim period.

## SEC filing metadata
- accession: 0001171843-25-007836
- form_type: 8-K
- ticker: XBIT
- cik: 0001626878
- company_name: XBiotech Inc.
- filed_at: 2025-12-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1626878/000117184325007836/0001171843-25-007836-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1626878/000117184325007836/f8k_120825.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-25-007836
- JSON: https://secwatch.observer/filing/0001171843-25-007836.json
- Plain text: https://secwatch.observer/filing/0001171843-25-007836.txt

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