---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-096643"
form_type: "8-K"
ticker: "SLS"
cik: "0001390478"
company_name: "SELLAS Life Sciences Group, Inc."
filed_at: "2025-10-03T23:59:59+00:00"
generated_at: "2026-05-17T04:43:24.471251+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# SELLAS extends NYC office sublease by one year to Sept 2027 with no rent change

## Summary
- Sublease at Times Square Tower extended to September 30, 2027, from September 30, 2026.
- Annual rent under the sublease remains unchanged.
- Sublandlord is Times Square Tower Associates LLC (successor-in-interest).
- No other material terms of the sublease were modified.

## SEC filing metadata
- accession: 0001104659-25-096643
- form_type: 8-K
- ticker: SLS
- cik: 0001390478
- company_name: SELLAS Life Sciences Group, Inc.
- filed_at: 2025-10-03T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1390478/000110465925096643/0001104659-25-096643-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1390478/000110465925096643/tm2527877d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-096643
- JSON: https://secwatch.observer/filing/0001104659-25-096643.json
- Plain text: https://secwatch.observer/filing/0001104659-25-096643.txt

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