---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-104947"
form_type: "8-K"
ticker: "MSB"
cik: "0000065172"
company_name: "MESABI TRUST"
filed_at: "2025-10-31T23:59:59+00:00"
generated_at: "2026-05-17T01:10:36.889010+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Mesabi Trust receives $4.0M Q3 royalty payment; shipments up 1.6% YoY

## Summary
- Total royalty payment of $4,005,142 received Oct 30, 2025, comprising base royalty $2,817,500 and bonus $973,410.
- Credited with 987,370 tons shipped in Q3 2025, up from 972,154 tons in Q3 2024 (+1.6%).
- Three sale transactions to a single third-party in September 2025 subject to continued due diligence review.
- Royalty payment excludes adjustments from prior quarters; prices remain subject to change.

## SEC filing metadata
- accession: 0001104659-25-104947
- form_type: 8-K
- ticker: MSB
- cik: 0000065172
- company_name: MESABI TRUST
- filed_at: 2025-10-31T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 2.02, 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/65172/000110465925104947/0001104659-25-104947-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/65172/000110465925104947/msb-20251030x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-104947
- JSON: https://secwatch.observer/filing/0001104659-25-104947.json
- Plain text: https://secwatch.observer/filing/0001104659-25-104947.txt

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