UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 26, 2025

MESABI TRUST

(Exact name of registrant as specified in its charter)


New York	1-4488	13-6022277
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

c/o Deutsche Bank Trust Company Americas
Trust & Agency Services
1 Columbus Circle, 17th Floor

Mail Stop: NYC01-1710
New York, New York

10019

(Address of principal executive offices)

(Zip Code)

(904) 271-2520

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on

which registered

Units of Beneficial Interest, no par value

MSB

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01Regulation FD.

Commencement of Arbitration

On September 26, 2025, Mesabi Trust (NYSE: MSB) initiated arbitration against Northshore Mining Company (“Northshore”) and its parent, Cleveland Cliffs Inc. (“Cliffs”) (Northshore and Cliffs, jointly, the “Operator”), the lessee/operator of the leased lands. Mesabi Trust commenced the arbitration proceeding through the American Arbitration Association. Mesabi Trust seeks damages and declaratory relief relating to the Operator’s idling of Northshore’s operations from May 2022 to April 2023 and underpayment of royalties on intercompany shipments from 2023 through the present.

Item 9.01Financial Statements and Exhibits.

(d)Exhibits.


Exhibit No.		Description
99.1		Press Release dated September 26, 2025
104		Cover Page Interactive Data File (formatted in Inline XBRL and included as Exhibit 101)

In accordance with general instruction B.2 to Form 8-K, the information in this Form 8-K shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


	MESABI TRUST

	By:	/s/Chris Niesz
		Chris Niesz
		Director
		Deutsche Bank Trust Company Americas, Corporate Trustee of Mesabi Trust

Dated: September 26, 2025

MESABI TRUST 8-K