---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-077556"
form_type: "8-K"
ticker: "SLS"
cik: "0001390478"
company_name: "SELLAS Life Sciences Group, Inc."
filed_at: "2026-06-25T12:30:49+00:00"
generated_at: "2026-06-25T12:35:36.384050+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# SELLAS amends CEO Stergiou's COC severance to lump sum; revises Burns, Cicic agreements

## Summary
- CEO Stergiou's change-in-control severance: lump sum of 24 months base salary plus 1.5x target bonus, full equity vesting, 18-month COBRA.
- Non-COC severance for CFO Burns and SVP Cicic: 9 months base salary, pro-rata target bonus, up to 9 months COBRA reimbursement.
- COC severance for Burns and Cicic: lump sum of 15 months base salary plus target bonus, 18-month COBRA, immediate full equity vesting.
- All three agreements were approved by the board on June 24, 2026, after compensation committee review.

## SEC filing metadata
- accession: 0001104659-26-077556
- form_type: 8-K
- ticker: SLS
- cik: 0001390478
- company_name: SELLAS Life Sciences Group, Inc.
- filed_at: 2026-06-25T12:30:49+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1390478/000110465926077556/0001104659-26-077556-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1390478/000110465926077556/tm2618927d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-077556
- JSON: https://secwatch.observer/filing/0001104659-26-077556.json
- Plain text: https://secwatch.observer/filing/0001104659-26-077556.txt

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