MESABI TRUST (MSB) Institutional Ownership and Insiders Activity

MESABI TRUST (MSB) is widely held by institutional investors, with 64 firms reporting positions valued at approximately $162.38M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Horizon Kinetics Asset Management Llc is the largest disclosed holder, reporting approximately $81.45M in MSB holdings in its latest filing.

Institutional ownership remains highly concentrated, with Horizon Kinetics Asset Management Llc representing the majority of disclosed value.