---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-277505"
form_type: "8-K"
ticker: "ANAB"
cik: "0001370053"
company_name: "ANAPTYSBIO, INC"
filed_at: "2026-06-22T20:05:16+00:00"
generated_at: "2026-06-22T20:06:32.072022+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# AnaptysBio subleases 45,057 sq ft of HQ to First Tracks for up to ~22 months

## Summary
- Sublease of 45,057 rentable sq ft at 10770 Wateridge Circle, San Diego, for 12-month initial term starting June 15, 2026.
- First Tracks has option to extend term until April 4, 2028 (max ~22 months) and can terminate with 3 months' notice.
- Sublessee pays Basic Rent plus Additional Rent under master lease; AnaptysBio remains primarily liable to master landlord.
- Sublease is subordinate to master lease; AnaptysBio cannot terminate or amend master lease without First Tracks' consent (except for its own termination option).

## SEC filing metadata
- accession: 0001193125-26-277505
- form_type: 8-K
- ticker: ANAB
- cik: 0001370053
- company_name: ANAPTYSBIO, INC
- filed_at: 2026-06-22T20:05:16+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1370053/000119312526277505/0001193125-26-277505-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1370053/000119312526277505/anab-20260615.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-277505
- JSON: https://secwatch.observer/filing/0001193125-26-277505.json
- Plain text: https://secwatch.observer/filing/0001193125-26-277505.txt

## Key facts
- Material Agreements
  ANAPTYSBIO, INC entered into Sublease Agreement with First Tracks Biotherapeutics, Inc. valued at monthly rent equal to the monthly Basic Rent and Additional Rent owed by the Company under the Maste (effective 2026-06-15).
  - Action: entry
  - Agreement: lease
  - Counterparty: First Tracks Biotherapeutics, Inc.
  - Value: monthly rent equal to the monthly Basic Rent and Additional Rent owed by the Company under the Maste
  - Effective: 2026-06-15
  source text: On June 15, 2026, AnaptysBio, Inc. (the “Company”), entered into a Sublease Agreement (the “Sublease”) with First Tracks Biotherapeutics, Inc., a Delaware corporation (“First Tracks”), pursuant to which the Company agreed to sublease to First Tracks 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/1370053/000119312526277505/0001193125-26-277505-index.htm

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