---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-088041"
form_type: "8-K"
ticker: "SON"
cik: "0000091767"
company_name: "SONOCO PRODUCTS CO"
filed_at: "2025-09-08T23:59:59+00:00"
generated_at: "2026-05-17T07:49:50.578345+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Sonoco sells ThermoSafe to Arsenal Capital Partners for up to $725M; proceeds to reduce debt

## Summary
- Total purchase price up to $725M: $650M at closing plus up to $75M earnout based on 2025 performance.
- ThermoSafe 2024 sales over $240M, proforma adjusted EBITDA ~$50M.
- Net proceeds expected to reduce debt; net leverage ratio to ~3.5x proforma.
- Transaction subject to regulatory approval, expected to close by end of 2025.
- Sale completes Sonoco's transformation into a global metal and fiber packaging leader.

## SEC filing metadata
- accession: 0001104659-25-088041
- form_type: 8-K
- ticker: SON
- cik: 0000091767
- company_name: SONOCO PRODUCTS CO
- filed_at: 2025-09-08T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/91767/000110465925088041/0001104659-25-088041-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/91767/000110465925088041/tm2525495d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-088041
- JSON: https://secwatch.observer/filing/0001104659-25-088041.json
- Plain text: https://secwatch.observer/filing/0001104659-25-088041.txt

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