---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-184864"
form_type: "8-K"
ticker: "SLVM"
cik: "0001856485"
company_name: "Sylvamo Corp"
filed_at: "2025-08-21T23:59:59+00:00"
generated_at: "2026-05-17T10:58:13.818666+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Sylvamo warns of International Paper's Riverdale mill conversion ending ~260K-ton supply by Q3 2026

## Summary
- International Paper plans to convert No. 16 paper machine at Riverdale Mill to containerboard by Q3 2026.
- The machine supplies Sylvamo with approximately 260,000 short tons of cutsize uncoated freesheet annually.
- Supply and Offtake Agreement from September 2021 has not been terminated, but supply will cease.
- Sylvamo CEO says company has planned for conversion since 2021 spinoff and made strategic investments.
- Additional details will be provided in a presentation at investors.sylvamo.com on August 21, 2025.

## SEC filing metadata
- accession: 0001193125-25-184864
- form_type: 8-K
- ticker: SLVM
- cik: 0001856485
- company_name: Sylvamo Corp
- filed_at: 2025-08-21T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1856485/000119312525184864/0001193125-25-184864-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1856485/000119312525184864/d947933d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-184864
- JSON: https://secwatch.observer/filing/0001193125-25-184864.json
- Plain text: https://secwatch.observer/filing/0001193125-25-184864.txt

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