---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-153076"
form_type: "8-K"
ticker: "BOLD"
cik: "0001782303"
company_name: "Boundless Bio, Inc."
filed_at: "2026-04-13T23:59:59+00:00"
generated_at: "2026-05-15T06:36:03.271613+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Boundless Bio terminates 80,168 sq ft San Diego lease; pays $10M, forfeits $0.5M deposit

## Summary
- Lease originally set to expire Oct 2034; terminated effective May 31, 2026.
- Company pays $10.0M lease modification payment plus $0.5M security deposit to landlord ARE-10933 North Torrey Pines.
- Condition precedent satisfied: Landlord has leased premises to a new tenant.
- Lease termination affects Company's lab and office space at 10955 Alexandria Way, San Diego.

## SEC filing metadata
- accession: 0001193125-26-153076
- form_type: 8-K
- ticker: BOLD
- cik: 0001782303
- company_name: Boundless Bio, Inc.
- filed_at: 2026-04-13T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.02, 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782303/000119312526153076/0001193125-26-153076-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782303/000119312526153076/bold-20260413.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-153076
- JSON: https://secwatch.observer/filing/0001193125-26-153076.json
- Plain text: https://secwatch.observer/filing/0001193125-26-153076.txt

## Source-grounded claims
- claim_id: d11ede3a3874b705b0dceb7f769be886ce5d1a9d
  claim: Boundless Bio, Inc. terminated Lease Termination Agreement with ARE-10933 North Torrey Pines, LLC valued at $10.0 million (effective 2026-04-13).
  evidence_excerpt: On April 13, 2026, Boundless Bio, Inc. (the "Company") entered into an Agreement for Termination of Lease and Voluntary Surrender of Premises (the "Lease Termination Agreement") with ARE-10933 North Torrey Pines, LLC ("Landlord"), pursuant to which the Company and Landlord agreed to terminate that certain Lease Agreement dated as of December 20, 2021
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782303/000119312526153076/0001193125-26-153076-index.htm

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