---
schema_version: "secwatch.filing_event.v1"
accession: "0001599298-25-000120"
form_type: "8-K"
ticker: "SMMT"
cik: "0001599298"
company_name: "Summit Therapeutics Inc."
filed_at: "2025-06-20T23:59:59+00:00"
generated_at: "2026-05-19T01:24:24.460266+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Summit Therapeutics sub-subleases 36,406 sq ft Palo Alto office; ~$2.8M annual rent

## Summary
- Sub-sublease for 36,406 sq ft in Palo Alto, CA, effective June 16, 2025, starting Jan 1, 2026, expiring Oct 28, 2033.
- Annual lease payments average ~$2.8M; term spans nearly 8 years from commencement.
- Agreement conditioned on consent of landlord and sublandlord; will be filed as exhibit to Q2 2025 10-Q.

## SEC filing metadata
- accession: 0001599298-25-000120
- form_type: 8-K
- ticker: SMMT
- cik: 0001599298
- company_name: Summit Therapeutics Inc.
- filed_at: 2025-06-20T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1599298/000159929825000120/0001599298-25-000120-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1599298/000159929825000120/smmt-20250616.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001599298-25-000120
- JSON: https://secwatch.observer/filing/0001599298-25-000120.json
- Plain text: https://secwatch.observer/filing/0001599298-25-000120.txt

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