MESABI TRUST

Exhibit 13

ANNUAL REPORT OF THE TRUSTEES OF

MESABI TRUST

For The Fiscal Year Ended January 31, 2026

ADDRESS

Mesabi Trust

c/o Deutsche Bank Trust Company Americas

Trust & Agency Services

1 Columbus Circle, 17th Floor

Mail Stop: NYC01-1710

New York, NY 10019

(904) 271-2520 (telephone)

www.mesabi-trust.com

REGISTRAR AND TRANSFER AGENT

Deutsche Bank Trust Company Americas

LEGAL COUNSEL

Fox Rothschild LLP

REGISTRANT INFORMATION

Mesabi Trust maintains a website that provides access to its annual, quarterly, and other reports it files with the Securities and Exchange Commission. Such reports can be accessed at www.mesabi-trust.com.Mesabi Trust will provide, upon the written request of any Unitholder addressed to the Trustees at the above address and without charge to such Unitholder, (i) a paper copy of Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 2026 (the “Annual Report”) as filed with the Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, and (ii) the Trustees’ Code of Ethics.

Table of Contents

Special Note Regarding Forward-Looking Statements

This report contains certain forward-looking statements with respect to iron ore pellet production, iron ore pricing and adjustments to pricing, shipments by Northshore Mining Company (“Northshore”) during 2026, royalty (including bonus royalty) amounts, and other matters, which statements are intended to be made under the safe harbor protections of the Private Securities Litigation Reform Act of 1995, as amended. Actual production, prices, price adjustments, and shipments of iron ore pellets, as well as actual royalty payments (including bonus royalties) could differ materially from current expectations due to inherent risks and uncertainties such as general adverse business and industry economic trends, uncertainties arising from war, terrorist events, imposition or termination of duties or tariffs and retaliatory tariffs, and other global events, higher or lower customer demand for steel and iron ore, decisions by mine operators regarding curtailments or idling production lines or entire plants, environmental compliance uncertainties, difficulties in obtaining and renewing necessary operating permits, higher imports of steel and iron ore substitutes, processing difficulties, consolidation and restructuring in the domestic steel market, market inputs tied to indexed price adjustment factors historically found in some of the pellet supply agreements between Cleveland-Cliffs Inc. (“Cliffs”) and its customers (“Cliffs Customer Contracts”) which may result in future adjustments to royalties payable to Mesabi Trust and other factors. Further, historically some of the royalties earned by Mesabi Trust have been based on estimated prices that are subject to interim and final adjustments, which can be positive or negative, and may be dependent in part on multiple price and inflation index factors under agreements to which Mesabi Trust was not a party and that were not known until after the end of a contract year. Although the Mesabi Trustees believe that any such forward-looking statements are based on reasonable assumptions, such statements are subject to risks and uncertainties, which could cause actual results to differ materially. Additional information concerning these and other risks and uncertainties is contained under the caption “Risk Factors” in Mesabi Trust’s filings with the Securities and Exchange Commission, including this Annual Report. Mesabi Trust undertakes no obligation to publicly update or revise any of the forward-looking statements made herein to reflect events or circumstances after the date hereof.

Mesabi Trust qualifies as a “Small Reporting Company” under Item 10(f)(1) of Regulation S-K. Therefore, Mesabi Trust has determined to comply with the disclosure requirements applicable to Smaller Reporting Companies in this Annual Report on Form 10-K. Mesabi Trust has elected to voluntarily include certain disclosures not required by a Smaller Reporting Company.