---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-291504"
form_type: "8-K"
ticker: "IOBTQ"
cik: "0001865494"
company_name: "IO Biotech, Inc."
filed_at: "2025-11-21T23:59:59+00:00"
generated_at: "2026-05-16T17:42:34.229252+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# IO Biotech chief accounting officer Burkavage resigns; CFO Sullivan to succeed

## Summary
- Brian Burkavage resigns as SVP and Chief Accounting Officer effective December 12, 2025 to pursue another opportunity; no dispute with company.
- CFO Amy Sullivan designated as principal accounting officer upon Burkavage's departure; no new compensatory arrangements entered.
- Sullivan's biography previously disclosed in IO Biotech's April 2025 definitive proxy statement.

## SEC filing metadata
- accession: 0001193125-25-291504
- form_type: 8-K
- ticker: IOBTQ
- cik: 0001865494
- company_name: IO Biotech, Inc.
- filed_at: 2025-11-21T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1865494/000119312525291504/0001193125-25-291504-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1865494/000119312525291504/d74446d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-291504
- JSON: https://secwatch.observer/filing/0001193125-25-291504.json
- Plain text: https://secwatch.observer/filing/0001193125-25-291504.txt

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