79 institutions reported holding $168.4M of MESABI TR (MSB) in SEC 13F filings for 2026-06-30. Largest institutional holders: HORIZON KINETICS ASSET MANAGEMENT LLC ($81.5M), VALUEWORKS LLC ($16.9M), CWA Asset Management Group, LLC ($13.1M), FIRST MANHATTAN CO. LLC. ($10.0M), MAD RIVER INVESTORS ($8.2M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30