---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-354027"
form_type: "8-K"
ticker: "GPK"
cik: "0001408075"
company_name: "GRAPHIC PACKAGING HOLDING CO"
filed_at: "2026-08-17T20:05:19+00:00"
generated_at: "2026-08-17T20:06:17.492748+00:00"
event_type: "litigation"
sentiment: "negative"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Graphic Packaging faces new derivative lawsuit filed Aug 14, 2026

## Summary
- Derivative lawsuit filed Aug 14, 2026 against GPHC and current/former officers and directors.
- Claims: federal securities law violations, breach of fiduciary duty, aiding and abetting, waste, unjust enrichment.
- Allegations substantially similar to June 2026 derivative action disclosed in Q2 10-Q.
- Company intends to vigorously defend against the claims.

## SEC filing metadata
- accession: 0001193125-26-354027
- form_type: 8-K
- ticker: GPK
- cik: 0001408075
- company_name: GRAPHIC PACKAGING HOLDING CO
- filed_at: 2026-08-17T20:05:19+00:00
- event_type: litigation
- sentiment: negative
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1408075/000119312526354027/0001193125-26-354027-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1408075/000119312526354027/d115777d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-354027
- JSON: https://secwatch.observer/filing/0001193125-26-354027.json
- Plain text: https://secwatch.observer/filing/0001193125-26-354027.txt

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