---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-326097"
form_type: "8-K"
ticker: "ANAB"
cik: "0001370053"
company_name: "ANAPTYSBIO, INC"
filed_at: "2026-07-30T20:05:15+00:00"
generated_at: "2026-07-30T20:08:46.872374+00:00"
event_type: "litigation"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# AnaptysBio and Tesaro/GSK set post-trial briefing schedule in collaboration dispute

## Summary
- Trial held July 14-17, 2026 in Delaware Chancery Court over alleged breach of Collaboration Agreement.
- Court granted joint stipulation: AnaptysBio opening brief due Aug 21, 2026.
- Defendants' answering brief due Sep 25, 2026; AnaptysBio reply due Oct 9, 2026.
- Post-trial argument scheduled for October 20, 2026.
- No settlement or judgment announced; litigation remains ongoing.

## SEC filing metadata
- accession: 0001193125-26-326097
- form_type: 8-K
- ticker: ANAB
- cik: 0001370053
- company_name: ANAPTYSBIO, INC
- filed_at: 2026-07-30T20:05:15+00:00
- event_type: litigation
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1370053/000119312526326097/0001193125-26-326097-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1370053/000119312526326097/anab-20260728.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-326097
- JSON: https://secwatch.observer/filing/0001193125-26-326097.json
- Plain text: https://secwatch.observer/filing/0001193125-26-326097.txt

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