---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-23-006860"
form_type: "8-K"
ticker: "MSB"
cik: "0000065172"
company_name: "MESABI TRUST"
filed_at: "2023-04-26T23:59:59+00:00"
generated_at: "2026-06-16T14:16:03.723644+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Cleveland-Cliffs partially restarts Northshore iron ore operations; full restart not expected in 2023

## Summary
- Cliffs announced partial restart of Northshore mining operations in April 2023 after being totally idle since spring 2022.
- CEO Lourenco Goncalves stated full operation of Northshore is not expected any time this year.
- Mesabi Trust's royalties depend on Northshore production; no additional volume or shipping details provided.
- Announcement made during Cliffs' Q1 2023 earnings call on April 24, 2023.

## SEC filing metadata
- accession: 0001558370-23-006860
- form_type: 8-K
- ticker: MSB
- cik: 0000065172
- company_name: MESABI TRUST
- filed_at: 2023-04-26T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/65172/000155837023006860/0001558370-23-006860-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/65172/000155837023006860/msb-20230426x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-23-006860
- JSON: https://secwatch.observer/filing/0001558370-23-006860.json
- Plain text: https://secwatch.observer/filing/0001558370-23-006860.txt

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