---
schema_version: "secwatch.filing_event.v1"
accession: "0002070849-26-000042"
form_type: "8-K"
ticker: "BLLN"
cik: "0002070849"
company_name: "BillionToOne, Inc."
filed_at: "2026-06-29T20:08:04+00:00"
generated_at: "2026-06-29T20:09:15.917202+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# BillionToOne enters 12-year lease for 62,659 sq ft oncology lab; base rent $46.7M

## Summary
- Leased 62,659 sq ft office and lab space at 3260 Whipple Road, Union City, CA on June 23, 2026.
- Lab dedicated to oncology products, more than tripling current oncology-dedicated laboratory space.
- Lease expected to commence August 1, 2027; initial term 12 years with option to extend 10 years.
- Aggregate base rent over 12-year term approx $46.7M; Landlord provides $12.5M tenant improvement allowance and 12-month rent abatement.
- Total facility space expands ~16%; test volumes exceeded plan, driving need for additional capacity.

## SEC filing metadata
- accession: 0002070849-26-000042
- form_type: 8-K
- ticker: BLLN
- cik: 0002070849
- company_name: BillionToOne, Inc.
- filed_at: 2026-06-29T20:08:04+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2070849/000207084926000042/0002070849-26-000042-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2070849/000207084926000042/blln-20260623.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0002070849-26-000042
- JSON: https://secwatch.observer/filing/0002070849-26-000042.json
- Plain text: https://secwatch.observer/filing/0002070849-26-000042.txt

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