---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-290608"
form_type: "8-K"
ticker: "MERC"
cik: "0001333274"
company_name: "MERCER INTERNATIONAL INC."
filed_at: "2026-06-30T20:26:53+00:00"
generated_at: "2026-06-30T20:28:14.296442+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Mercer International extends Rosenthal pulp mill shutdown to full September 2026

## Summary
- Mercer Rosenthal maintenance shutdown extended from two weeks to entire month of September 2026.
- Company coordinating with production, wood procurement, logistics, and pulp sales teams.
- No financial or production impact estimates disclosed in the press release.

## SEC filing metadata
- accession: 0001193125-26-290608
- form_type: 8-K
- ticker: MERC
- cik: 0001333274
- company_name: MERCER INTERNATIONAL INC.
- filed_at: 2026-06-30T20:26:53+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1333274/000119312526290608/0001193125-26-290608-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1333274/000119312526290608/d123506d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-290608
- JSON: https://secwatch.observer/filing/0001193125-26-290608.json
- Plain text: https://secwatch.observer/filing/0001193125-26-290608.txt

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