---
schema_version: "secwatch.filing_event.v1"
accession: "0001206264-25-000180"
form_type: "8-K"
ticker: "SGI"
cik: "0001206264"
company_name: "SOMNIGROUP INTERNATIONAL INC."
filed_at: "2025-09-30T23:59:59+00:00"
generated_at: "2026-05-17T05:13:32.742124+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Somnigroup appoints Christopher Cook as independent director, board expands to eight

## Summary
- Christopher Cook appointed independent director effective Sept 30, 2025; board size increased from 7 to 8.
- Cook founded Sleep Experts, served as CEO until 2014 sale to Mattress Firm; Mattress Firm director until Somnigroup's 2025 acquisition.
- Cook brings 20+ years retail expertise; no related-party transactions disclosed; term expires at 2026 annual meeting.
- Will receive pro-rata director equity award under non-employee director compensation plan.

## SEC filing metadata
- accession: 0001206264-25-000180
- form_type: 8-K
- ticker: SGI
- cik: 0001206264
- company_name: SOMNIGROUP INTERNATIONAL INC.
- filed_at: 2025-09-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1206264/000120626425000180/0001206264-25-000180-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1206264/000120626425000180/sgi-20250930.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001206264-25-000180
- JSON: https://secwatch.observer/filing/0001206264-25-000180.json
- Plain text: https://secwatch.observer/filing/0001206264-25-000180.txt

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