---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-277504"
form_type: "8-K"
ticker: "TRAX"
cik: "0002091349"
company_name: "First Tracks Biotherapeutics, Inc."
filed_at: "2026-06-22T20:05:16+00:00"
generated_at: "2026-06-22T20:06:15.645633+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# First Tracks Biotherapeutics subleases 45,057 sq ft San Diego office from AnaptysBio for 12 months

## Summary
- Subleased 45,057 rentable square feet at 10770 Wateridge Circle, San Diego from AnaptysBio, Inc.
- Term began June 15, 2026 for 12 months; renewal option to April 2028 or +12 months with 3-month notice.
- Monthly rent equals AnaptysBio's base rent plus additional rent under master lease, paid in advance.
- Company can terminate sublease at any time with at least 3 months' prior written notice.
- Sublease is subordinate to master lease; AnaptysBio remains liable to master landlord.

## SEC filing metadata
- accession: 0001193125-26-277504
- form_type: 8-K
- ticker: TRAX
- cik: 0002091349
- company_name: First Tracks Biotherapeutics, Inc.
- filed_at: 2026-06-22T20:05:16+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2091349/000119312526277504/0001193125-26-277504-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2091349/000119312526277504/trax-20260615.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-277504
- JSON: https://secwatch.observer/filing/0001193125-26-277504.json
- Plain text: https://secwatch.observer/filing/0001193125-26-277504.txt

## Key facts
- Material Agreements
  First Tracks Biotherapeutics, Inc. entered into Sublease with AnaptysBio, Inc. (effective 2026-06-15).
  - Action: entry
  - Agreement: lease
  - Counterparty: AnaptysBio, Inc.
  - Effective: 2026-06-15
  source text: On June 15, 2026, First Tracks Biotherapeutics, Inc. (the “Company”), entered into a Sublease Agreement (the “Sublease”) with AnaptysBio, Inc., a Delaware corporation (“AnaptysBio”), pursuant to which AnaptysBio agreed to sublease to the Company approximately 45,057 rentable square feet of space located at 10770 Wateridge Circle, San Diego, California 92121 (the “Premises”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/2091349/000119312526277504/0001193125-26-277504-index.htm

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