---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-277418"
form_type: "8-K"
ticker: "GH"
cik: "0001576280"
company_name: "Guardant Health, Inc."
filed_at: "2023-11-15T23:59:59+00:00"
generated_at: "2026-06-08T02:24:18.811346+00:00"
event_type: "litigation"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Guardant Health hit with $83.4M patent infringement verdict; will appeal

## Summary
- Jury found willful infringement of two patents; awarded $83.4M in damages (6% royalty on past sales).
- Plaintiffs may seek up to treble damages (≈$250M) based on the willfulness finding.
- Guardant strongly disagrees, plans post-trial motions and appeal to Federal Circuit.
- Company says verdict unlikely to materially impact business but may require future royalty payments if upheld.
- Case: TwinStrand Biosciences, Inc. and Univ. of Washington v. Guardant Health, C.A. No. 21-1126-GBW-SRF.

## SEC filing metadata
- accession: 0001193125-23-277418
- form_type: 8-K
- ticker: GH
- cik: 0001576280
- company_name: Guardant Health, Inc.
- filed_at: 2023-11-15T23:59:59+00:00
- event_type: litigation
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1576280/000119312523277418/0001193125-23-277418-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1576280/000119312523277418/d850613d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-277418
- JSON: https://secwatch.observer/filing/0001193125-23-277418.json
- Plain text: https://secwatch.observer/filing/0001193125-23-277418.txt

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