Arbitration, cybersecurity and trustee pay at Mesabi Trust (NYSE: MSB)

Rhea-AI Filing Summary

Mesabi Trust files its annual report describing its operations as a pass-through royalty trust tied to a single segment: iron ore mining. The filing highlights an arbitration begun on September 26, 2025 against Northshore Mining Company and Cleveland-Cliffs Inc. over the idling of Northshore’s operations from May 2022 to April 2023 and alleged underpayment of royalties on intercompany shipments from 2023 onward.

The Corporate Trustee, Deutsche Bank Trust Company Americas, oversees cybersecurity risk and maintains a cyber risk management program with annual third-party assessments; prior cyber incidents have not had a material adverse effect. The Trust has no directors, officers, or employees and is governed by four individual Trustees plus the Corporate Trustee, who collectively perform audit and governance functions and held nine meetings in fiscal 2026.

Insights

Income trust and governance analyst

Mesabi Trust’s 10-K emphasizes operator dependence, arbitration, and outsourced controls.

Mesabi Trust functions purely as a pass-through royalty trust, so its results depend heavily on Northshore Mining and Cleveland-Cliffs’ production and royalty calculations. The 10-K notes that substantially all revenue, operating profits and assets come from iron ore mining tied to these counterparties.

The arbitration filed on September 26, 2025 seeks damages and declaratory relief related to Northshore’s idling from May 2022 to April 2023 and alleged underpayment of royalties since 2023. While no amounts are specified here, the dispute directly involves royalty flows that support distributions.

Risk oversight relies on the Corporate Trustee’s systems, third-party consultants, and certifications from Northshore and Cliffs rather than internal staff. Cybersecurity is handled through a dedicated program with annual third-party assessment, and prior incidents have not been material. Future financial impacts, if any, would be reflected in subsequent royalty receipts and distributions.

Key Figures

Market value of non-affiliate units: $383,596,142 Units outstanding: 13,120,010 units Horizon Kinetics holding: 2,999,326 units (22.9%) +5 more

8 metrics

Market value of non-affiliate units $383,596,142 Aggregate market value as of July 31, 2025

Units outstanding 13,120,010 units Units of Beneficial Interest outstanding as of April 21, 2026

Horizon Kinetics holding 2,999,326 units (22.9%) Beneficial ownership of Mesabi Trust units as of April 22, 2026

ValueWorks holding 685,846 units (5.2%) Beneficial ownership of Mesabi Trust units as of April 22, 2026

Individual Trustee compensation $52,982 Total compensation per individual Trustee in fiscal 2026

Corporate Trustee compensation $316,442 Total compensation to Deutsche Bank Trust Company Americas year ended January 31, 2026

Audit fees 2026 $105,000 Fees to Boulay, PLLP for audit and quarterly reviews in fiscal 2026

Trustee meetings 9 meetings Trustee meetings held in fiscal 2026, in person or via teleconference

Key Terms

cybersecurity, disclosure controls and procedures, pass-through royalty trust, Rule 10b5-1 trading arrangement, +2 more

6 terms

cybersecurity technical

"ITEM 1C. CYBERSECURITY. Mesabi Trust does not have any directors, officers or employees."

Cybersecurity involves protecting computers, networks, and digital information from theft, damage, or unauthorized access. It is essential for safeguarding sensitive data and maintaining trust in digital systems, which matters to investors because strong cybersecurity reduces the risk of costly breaches and disruptions that can impact a company’s performance and reputation. Think of it as locking and safeguarding valuable information much like securing a safe to prevent theft.

disclosure controls and procedures financial

"The Trust maintains a system of disclosure controls and procedures designed to ensure that information required to be disclosed..."

Policies, routines and internal checks a public company uses to identify, collect and verify information that must appear in its financial reports and public filings, and to make sure that material news is disclosed accurately and on time. Investors care because effective controls increase confidence that the company’s reported numbers and disclosures are reliable and reduce the risk of surprises, much like a building’s inspection and alarm system helps occupants trust the structure’s safety.

pass-through royalty trust financial

"Because of its legal structure and character as a pass-through royalty trust, the Trust is exempt from Rule 10A-3..."

Rule 10b5-1 trading arrangement regulatory

"none of the Trustees adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,”"

related person transaction financial

"The Trust maintains a written related person transaction approval policy, which sets forth the Trust’s policies and procedures..."

Incentive Based Award Recovery Policy regulatory

"Mesabi Trust Incentive Based Award Recovery Policy | Incorporated by reference from Exhibit 97 to Mesabi Trust’s Annual Report..."

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

How to Read a 10-K Annual Report →

Accepted by SEC EDGAR 04/22/2026 - 04:30 PM Learn about SEC filing dates

FAQ

What is Mesabi Trust (MSB) and how does it generate income?

Mesabi Trust is a pass-through royalty trust whose revenue, operating profits and assets relate to a single segment: iron ore mining. It earns royalties from leased mineral properties operated by Northshore Mining Company and distributes net income to unitholders after expenses and reserves.

What arbitration did Mesabi Trust (MSB) initiate against Northshore and Cleveland-Cliffs?

On September 26, 2025, Mesabi Trust began arbitration against Northshore Mining Company and its parent Cleveland-Cliffs Inc. It seeks damages and declaratory relief tied to Northshore’s idling from May 2022 to April 2023 and alleged underpayment of royalties on intercompany shipments from 2023 onward.

How many Mesabi Trust (MSB) units are outstanding and who are major holders?

As of April 21, 2026, Mesabi Trust had 13,120,010 Units of Beneficial Interest outstanding. Major reported holders include Horizon Kinetics Asset Management LLC with 2,999,326 units (22.9%) and ValueWorks LLC with 685,846 units (5.2%), based on beneficial ownership filings.

How is Mesabi Trust (MSB) governed given it has no officers or employees?

Mesabi Trust is governed by four individual Trustees and a Corporate Trustee, Deutsche Bank Trust Company Americas. It has no directors, officers, or employees. Trustees meet at least quarterly, conduct annual site visits to Northshore’s operations, and collectively perform audit and oversight functions.

What compensation do Mesabi Trust (MSB) Trustees and Corporate Trustee receive?

Each individual Trustee received $52,982 in fiscal 2026, adjusted annually using the All Commodities Producer Price Index, with a $20,000 minimum. The Corporate Trustee earned $316,442 in total compensation for the year ended January 31, 2026, plus $9,500 for registrar and transfer agent services.

What cybersecurity measures are described in Mesabi Trust’s 10-K?

The Corporate Trustee manages Mesabi Trust’s cyber risk, using dedicated personnel, leading cybersecurity firms, and annual third-party assessments. Controls include technology to prevent and detect incidents, password protections, employee training, and secure handling of non-public information. Prior incidents have not been materially adverse.

How much did Mesabi Trust (MSB) pay its auditor in fiscal 2026?

For fiscal 2026, Mesabi Trust paid Boulay, PLLP audit fees of $105,000 for auditing annual financial statements and reviewing quarterly reports. No audit-related, tax, or other fees were paid, and the Trustees pre-approved 100% of Boulay’s services for fiscal 2026 and 2025.

2026FY0000065172false00000651722025-11-012026-01-3100000651722025-07-3100000651722026-04-2100000651722025-02-012026-01-310000065172msb:TrustCorpusMember2026-01-310000065172msb:TrustCorpusMember2025-01-310000065172msb:TrustCorpusMember2024-01-310000065172msb:RoyaltiesFromLeasesMember2025-02-012026-01-310000065172msb:RoyaltiesFromLeaseFeesMember2025-02-012026-01-310000065172msb:RoyaltiesFromLeasesMember2024-02-012025-01-310000065172msb:RoyaltiesFromLeaseFeesMember2024-02-012025-01-3100000651722024-10-042024-10-0400000651722024-09-062024-09-060000065172msb:UnallocatedReserveMember2026-01-310000065172msb:UnallocatedReserveMember2025-01-310000065172msb:UnallocatedReserveMember2024-01-3100000651722024-01-310000065172msb:ThirdMillionTonsShippedOrDeemedShippedMember2025-02-012026-01-310000065172msb:SecondMillionTonsShippedOrDeemedShippedMember2025-02-012026-01-310000065172msb:FourthMillionTonsShippedOrDeemedShippedMember2025-02-012026-01-310000065172msb:FirstMillionTonsShippedOrDeemedShippedMember2025-02-012026-01-310000065172msb:BeyondFourMillionTonsShippedOrDeemedShippedMember2025-02-012026-01-310000065172srt:MaximumMember2025-02-012026-01-3100000651722024-09-060000065172msb:UnallocatedReserveMember2024-02-012025-01-310000065172msb:UnallocatedReserveMember2025-02-012026-01-310000065172us-gaap:SubsequentEventMember2026-04-142026-04-1400000651722026-02-012026-02-280000065172msb:CyprusNorthshoreMiningCorporationMembersrt:MaximumMember2025-02-012026-01-310000065172msb:CyprusNorthshoreMiningCorporationMembersrt:MinimumMembersrt:ScenarioForecastMember2026-01-012026-12-310000065172msb:CyprusNorthshoreMiningCorporationMembersrt:MinimumMember2025-01-012025-12-310000065172msb:CyprusNorthshoreMiningCorporationMembersrt:MinimumMember2025-02-012026-01-310000065172msb:CyprusNorthshoreMiningCorporationMember2025-02-012026-01-310000065172msb:CyprusNorthshoreMiningCorporationMember2024-02-012025-01-310000065172msb:CyprusNorthshoreMiningCorporationMember2023-02-012024-01-3100000651722023-02-012024-01-310000065172srt:MinimumMember2025-02-012026-01-3100000651722024-03-012024-03-3100000651722026-01-3100000651722025-01-3100000651722024-02-012025-01-31msb:itemxbrli:pureiso4217:USDutr:Tiso4217:USDxbrli:sharesutr:MTmsb:contractxbrli:sharesiso4217:USD

Table of Contents

​

​

​

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED JANUARY 31, 2026

or

☐    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM               to        

COMMISSION FILE NUMBER: 1-4488

MESABI TRUST

(Exact Name of Registrant as Specified in Its Charter)

	​
New York	​	13-6022277
(State or Other Jurisdiction of	​	(I.R.S. Employer
Incorporation or Organization)	​	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)

​

Registrant’s Telephone Number, Including Area Code: (904) 271-2520

​

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 in Mesabi Trust	​	MSB	​	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ◻  No ⌧

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ◻  No ⌧

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ⌧ No ◻

Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ⌧ No ◻

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

	​
Large accelerated filer ☐	​	Accelerated filer ☐
Non-accelerated filer ⌧	​	Smaller reporting company ☒
	​	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. ◻

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ◻

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐  No ☒

As of July 31, 2025, the aggregate market value of the Units of Beneficial Interest in the registrant held by non-affiliates of the registrant was $383,596,142 based on the closing sale price as reported on the New York Stock Exchange. As of April 21, 2026, there were 13,120,010 Units of Beneficial Interest in Mesabi Trust outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

​

	​
Document	​	Parts Into Which Incorporated
Annual Report of the Trustees for the Fiscal Year Ended January 31, 2026 (Annual Report)	​	Parts I, II, and IV

​

​

​

Table of Contents

MESABI TRUST

ANNUAL REPORT ON FORM 10-K

Table of Contents

​

Page

PART I
ITEM 1.	Business	3
ITEM 1A.	Risk Factors	3
ITEM 1B.	Unresolved Staff Comments	3
ITEM 1C.	Cybersecurity	3
ITEM 2.	Properties	4
ITEM 3	Legal Proceedings	4
ITEM 4.	Mine Safety Disclosures	4
PART II
ITEM 5.	Market for Registrant’s Common Equity, Related Unitholder Matters and Issuer Purchases of Equity Securities	5
ITEM 6.	Reserved	5
ITEM 7.	Trustees’ Discussion and Analysis of Financial Condition and Results of Operations	5
ITEM 7A	Quantitative and Qualitative Disclosures about Market Risk	5
ITEM 8.	Financial Statements and Supplementary Data	5
ITEM 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	5
ITEM 9A.	Controls and Procedures	5
ITEM 9B.	Other Information	6
ITEM 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	6
PART III
ITEM 10.	Directors, Executive Officers and Corporate Governance	7
ITEM 11.	Executive Compensation	9
ITEM 12.	Security Ownership of Certain Beneficial Owners and Trustees and Related Unitholder Matters	11
ITEM 13.	Certain Relationships and Related Transactions, and Director Independence	12
ITEM 14.	Principal Accountant Fees and Services	13
PART IV
ITEM 15.	Exhibit and Financial Statement Schedules	14
ITEM 16.	Form 10-K Summary	17
Signatures		18

​

​

​

​

2

Table of Contents

PART I

ITEM 1.            BUSINESS.

(a)         General Development of Business.

The information under the headings “Trustees’ Discussion and Analysis of Financial Condition and Results of Operations,” “The Trust Estate,” “Leasehold Royalties,” and “Land Trust and Fee Royalties” in the Annual Report of the Trustees of Mesabi Trust for the fiscal year ended January 31, 2026, filed as Exhibit 13 to this Form 10-K (the “Annual Report”) is incorporated herein by reference.

(b)         Financial Information About Segments.

Substantially all of the revenue, operating profits and assets of Mesabi Trust (“Mesabi Trust” or the “Trust”) relate to one business segment—iron ore mining.

(c)         Narrative Description of Business.

The information under the headings “Overview,” “Overview of the Trust’s Royalty Structure,” “Trustees’ Discussion and Analysis of Financial Condition and Results of Operations,” “The Trust Estate,” “Leasehold Royalties” and “Description of the Mineral Properties” in the Annual Report is incorporated herein by reference.

(d)         Financial Information About Geographical Areas.

All of the Trust’s revenues are derived from the assets of the Trust, information of which is set forth under the headings “The Trust Estate” and “Description of the Mineral Properties” of the Annual Report. The information under the heading “Selected Financial Data” in the Annual Report is incorporated herein by reference.

(e)         Availability of Reports on Registrant’s Website.

The information on the cover page of the Annual Report is incorporated herein by reference.

ITEM 1A.         RISK FACTORS.

The information under the heading “Risk Factors” in the Annual Report is incorporated by reference.

ITEM 1B.         UNRESOLVED STAFF COMMENTS.

None.

ITEM 1C.         CYBERSECURITY.

Mesabi Trust does not have any directors, officers or employees. The Corporate Trustee is responsible for oversight of Mesabi Trust’s risks from cybersecurity threats as it relates to financial record keeping, cash and investment management, administration and reporting. The Corporate Trustee also serves as registrar and transfer agent for the Trust. The Corporate Trustee has dedicated personnel responsible for assessing and managing Mesabi Trust’s cyber risk management efforts, informing senior management of the Corporate Trustee regarding the prevention, detection, mitigation and remediation of cybersecurity incidents

3

Table of Contents

and supervising such efforts. The Corporate Trustee’s information technology team has significant experience selecting, deploying and operating cybersecurity technologies, initiatives and processes and relies on threat intelligence as well as other information obtained from governmental, public or private sources, including external consultants engaged by the Corporate Trustee to monitor the prevention, detection, mitigation, and remediation of cybersecurity incidents. The Corporate Trustee works with leading firms in the cybersecurity industry, leveraging their technology and expertise to monitor and maintain the performance and effectiveness of products and services that are used by the Corporate Trustee. The Corporate Trustee maintains a cyber risk management program designed to identify, assess, manage, mitigate, and respond to cybersecurity threats, which processes are integrated into the Corporate Trustee’s overall risk management process. The Corporate Trustee maintains robust cybersecurity protocols including, but not limited to technological capabilities that prevent and detect disruptions, computer workstations and programs protected with passwords and passphrases, as well as employee training throughout the year on financial regulations and cybersecurity followed up by testing of that knowledge. The protocols are based on recognized best practices and standards for cybersecurity and information technology. The Corporate Trustee has an annual assessment, performed by a third-party vendor, of the Corporate Trustee’s cyber risk management program. Other non-technical protocols include securing of documents and work areas that could contain non-public information and independent verification of information changes by outside vendors. Mesabi Trust faces risks from cybersecurity threats that could have a material adverse effect on its financial condition, results of operations, cash flows or reputation. The Corporate Trustee has experienced, and will continue to experience, cyber incidents in the normal course of its business. However, prior cybersecurity incidents have not had a material adverse effect on Mesabi Trust’s focus, financial condition, results of operations, or cash flows. See “Risk Factors – General Risk Factors – The Trust faces risks from cybersecurity threats that could have a material adverse effect on its financial condition, financial record keeping, investment management, reporting, results of operations, cash flows or reputation.”

ITEM 2.            PROPERTIES.

The information under the heading “The Trust Estate,” “Duration of the Trust Estate,” “History of the Trust’s Acquisition of the Trust Estate,” and “Description of the Mineral Properties and Northshore’s Mining Operations,” in the Annual Report is incorporated herein by reference.

ITEM 3.            LEGAL PROCEEDINGS.

AAA Arbitration

As previously announced, on September 26, 2025, Mesabi Trust 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 4.            MINE SAFETY DISCLOSURES.

Not applicable.

4

Table of Contents

PART II

ITEM 5.            MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED UNITHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.

The information under the headings “Unallocated Reserve” and “Certificates of Beneficial Interest” in the Annual Report is incorporated herein by reference.

ITEM 6.            RESERVED.

​

ITEM 7.            TRUSTEES’ DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The information under the headings “Trustees’ Discussion and Analysis of Financial Condition and Results of Operations,” “Leasehold Royalties,” “Trust Expenses,” and “Unallocated Reserve” in the Annual Report is incorporated herein by reference.

ITEM 7A.         QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

Not applicable.

ITEM 8.            FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

The financial statements, including the Independent Registered Public Accounting Firm’s report thereon, filed as a part of this Form 10-K, are presented on pages F-4 through F-14 and are incorporated herein by reference.

ITEM 9.            CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE.

During the last two fiscal years, Mesabi Trust has had no disagreements with its accountants on accounting and financial disclosure. There were no changes in Mesabi Trust’s independent registered public accounting firm during the fiscal years ended January 31, 2026 and 2025.

ITEM 9A.         CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures. The Trust maintains a system of disclosure controls and procedures designed to ensure that information required to be disclosed by the Trust in the reports that it furnishes or files under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the rules and regulations of the Securities and Exchange Commission. Due to the pass-through nature of the Trust, the Trust’s disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed by Mesabi Trust is received from Cliffs and its wholly-owned subsidiary, Northshore. In order to help ensure the accuracy and completeness of the information required to be disclosed in the Trust’s periodic and current reports, the Trust engages certified public accountants, geological consultants, engineering firms, and attorneys. These professionals hired by the Trust advise the Trust in its review and compilation of the information in this Form 10-K and the other periodic reports filed by the Trust with the SEC.

5

Table of Contents

As part of their evaluation of Mesabi Trust’s disclosure controls and procedures, the Trustees rely on quarterly shipment and royalty calculations provided by Northshore and Cliffs. Because Northshore has declined to provide a written certification attesting to whether Northshore has established disclosure controls and procedures and internal controls sufficient to enable it to verify that the information furnished to the Trustees is accurate and complete, the Trustees also rely on (a) an annual certification from Northshore and Cliffs, certifying as to the accuracy of the royalty calculations, and (b) the related due diligence review performed by the Trust’s accountants. In addition, Mesabi Trust’s consultants review the schedule of leasehold royalties payable, and shipping and sales reports provided by Northshore against production and shipment reports prepared by Eveleth Fee Office, Inc., an independent consultant to Mesabi Trust (“Eveleth Fee Office”). Eveleth Fee Office performs inspections of the Northshore mine and its pelletizing operations, observes production and shipping activities, gathers production and shipping information from Northshore and prepares monthly production and shipment reports for the Trustees. Furthermore, as part of its engagement by Mesabi Trust, Eveleth Fee Office also attends Northshore’s inventory stockpile surveys as well as the calibration and testing of its crude ore scales and boat loader scales which are conducted on a periodic basis.

As of the end of the period covered by this report, the Trustees carried out an evaluation of Mesabi Trust’s disclosure controls and procedures. Based on this evaluation, the Trustees have concluded that such disclosure controls and procedures are effective.

Trustees’ Report on Internal Control over Financial Reporting. The Trustees’ Report on Internal Control over Financial Reporting is set forth on page F-2 of the Annual Report. This Annual Report on Form 10-K does not include, and is not required to include, an attestation report of our independent registered public accounting firm on internal control over financial reporting based on an exemption from such rules related to the Trust’s status as a smaller reporting company and non-accelerated filer.

Changes in Internal Control over Financial Reporting. To the knowledge of the Trustees there were no changes in the Trust’s internal control over financial reporting that occurred during the Trust’s last fiscal quarter that has materially affected, or is likely to materially affect, the Trust’s internal control over financial reporting. The Trustees note for purposes of clarification that they have no authority over, and make no statement concerning, the internal controls of Northshore or Cliffs.

ITEM 9B.         OTHER INFORMATION.

Rule 10b5-1 Plan and Non-Rule 10b5-1 Trading Arrangement Adoptions, Terminations, and Modifications. During the three months ended January 31, 2026, none of the Trustees adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408 of SEC Regulation S-K.

ITEM 9C.         DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS.

Not applicable.

​

6

Table of Contents

PART III

ITEM 10.          DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE.

The Agreement of Trust dated July 18, 1961, as amended by the Amendment to the Agreement of Trust dated as of October 25, 1982 (the “Agreement of Trust”) provides for a Corporate Trustee and four individual Trustees (collectively, the “Trustees”). The Trust does not have, nor does the Agreement of Trust provide for officers, a board of directors or any committees. Generally, the Trustees continue in office until their resignation or removal. Any Trustee may be removed at any time, with or without cause, by the holders of two-thirds in interest of the Certificates of Beneficial Interest in the Trust (the “Trust Certificates”) then outstanding. In the case of an individual Trustee, a successor is appointed if the individual Trustee dies, becomes incapable of acting or is adjudged bankrupt or insolvent. In the case of the Corporate Trustee, a successor is appointed if a receiver of the Corporate Trustee or of its property is appointed, or if any public officer takes charge or control of the Corporate Trustee or of its property or affairs for the purpose of rehabilitation, conservation or liquidation. Successor Trustees can only be appointed by the holders of a majority in interest of the Trust Certificates then outstanding. Because such appointments are not made on a regular or periodic basis, the Trust does not have a standing nominating committee or a policy in place for the recommendation and nomination of successor Trustees.

The Trust’s activities are limited to collecting income, paying expenses and liabilities, distributing net income to the holders of Trust Certificates (the “Unitholders”) after the payment of, or provision for, such expenses and liabilities, and protecting and conserving the assets held. The Trustees have adopted a Code of Ethics that applies to the Trustees. A copy of the Code of Ethics is incorporated by reference in Exhibit 14 of this Form 10-K. We intend to disclose any amendments to and any waivers from a provision of our Code of Ethics on our website (www.mesabi-trust.com) within four business days following such amendment or waiver.

Because the Trust does not have directors, officers, or employees, it has not adopted insider trading policies and procedures governing the purchase, sale, and/or dispositions of Trust securities by such persons.

The Trust has not designated a separate audit committee comprised of independent committee members relying on an exemption provided by Rule 10A-3 of the Securities Exchange Act of 1934, as amended. As such, the Trustees have not designated an “audit committee financial expert.” The Trustees collectively perform the functions of an audit committee.

To carry out the Trustees’ duties under the Agreement of Trust, the Trustees meet on at least a quarterly basis to discuss information and circumstances relevant to the Trust. The Trustees also conduct telephone conferences from time to time between the quarterly meetings to address developments that require more timely attention. The Trustees held 9 meetings either in person or via teleconference in fiscal 2026. All of the Trustees attended at least 75% of the sum of all Trustee meetings held in fiscal 2026.

In the third quarter of each year, the Trustees also conduct an annual inspection trip in which they personally visit and tour Northshore’s mining operations and plant facilities located near Babbitt and in Silver Bay, Minnesota, respectively. During the inspection trip, the Trustees meet with and interview Northshore personnel with respect to Northshore’s current operations, changes in operations, mining plans, capital equipment and facilities.

Because Mesabi Trustees are appointed until they resign or are removed, at the time of nomination the Trustees believe that it is necessary for each Trustee to possess many qualities and skills. Set forth below are the present Trustees’ principal occupations and directorships held with other public corporations during

7

Table of Contents

the past five years, or longer as material, their ages and the year each of the Trustees was first elected as a Trustee of the Trust.

Robert C. Berglund

Age: 79

Year Appointed and elected as Individual Trustee: 2009

Retired Vice President and General Manager, Cleveland-Cliffs Inc.

​

Mr. Berglund has extensive experience in the mining industry. He retired from his position as Vice President and General Manager of Northshore Mining Company in 2003 after spending thirty-five years in mining production and operations management with Cliffs. Mr. Berglund joined Cliffs after graduating from Penn State University in 1968 with a B.S. in Mining Engineering. From 1968 until 2003, Mr. Berglund worked onsite at various mines owned and operated by Cliffs across North America.

​

James A. Ehrenberg

Age: 83

Year Appointed and elected as Individual Trustee: 2006

Retired Vice President, U.S. Bank, N.A.

​

Mr. Ehrenberg has extensive experience serving as corporate trustee. Before retiring from his position as Senior Vice President of U.S. Bank, N.A. Mr. Ehrenberg spent nearly forty years in the corporate trust department of U.S. Bank, N.A. and its predecessor, First Trust Company of Saint Paul. From 1983 until April 2005, Mr. Ehrenberg was directly responsible for providing corporate trustee services to the Mesabi Land Trust of which Mesabi Trust is the sole trust certificate holder.

​

Michael P. Mlinar

Age: 72

Year Appointed and elected as Individual Trustee: 2014

Retired Vice President of North American Iron Ore Initiatives, Cleveland-Cliffs Inc.

​

Mr. Mlinar, appointed and elected as a Mesabi Trustee in 2014, retired from his position as Vice President of North American Iron Ore Initiatives in 2013 after spending thirty-six years in mining production and operations management. Mr. Mlinar was General Manager at five different Cliffs’ subsidiaries: Tilden, Empire, Hibbing Taconite, United Taconite and Northshore Mining, and then was Integration Lead for the Bloom Lake Mine. In 2011, Mr. Mlinar became a Vice President of North American Iron Ore Initiatives.

​

Robin M. Radke

Age: 55

Year Appointed and elected as Individual Trustee: 2019

Attorney with Fredrikson & Byron, P.A.

​

Ms. Radke is an attorney with Fredrikson & Byron, P.A. and has more than twenty-five years of business and legal experience, including over twenty years in private and in-house legal practice. Before joining Fredrikson in June 2023, she was general counsel and chief compliance officer of Merced Capital, L.P., a privately held registered investment adviser, where she worked from 2014 to January 2023. Prior to Merced, Ms. Radke was an attorney

8

Table of Contents

with Oppenheimer Wolff & Donnelly LLP (now Fox Rothschild LLP) for eleven years where her work included advising the Trust on securities reporting, internal controls and general matters. Ms. Radke’s legal practice included advising clients regarding a wide spectrum of industries, including financial services, lending, real estate, energy and shipping. In addition, she has experience in securities law and general corporate law.

The Trust believes that each of the individual Trustees has a diversified background and extensive financial, business and industry specific expertise that make them an important resource in the oversight of the Trust’s affairs. There are no family relationships among any of the Individual Trustees.

ITEM 11.          EXECUTIVE COMPENSATION.

Compensation Discussion and Analysis

The Trust does not have a board of directors, executive officers or any employees. The compensation paid to the Trustees is governed by the Amendment to the Agreement of Trust dated October 25, 1982, as amended (the “Amendment”). The Amendment does not provide for any stock awards, option awards, non-equity incentive plan compensation, change in pension value, nonqualified deferred compensation earnings or any other compensation. The Trust does not have severance agreements nor does it provide post-retirement benefits to the Trustees. Accordingly, all such tables have been omitted from the Annual Report.

Pursuant to the Amendment, each individual Trustee receives at least $20,000 in annual compensation for services as Trustee. Each year, annual Trustee compensation is adjusted up or down (but not below $20,000) in accordance with changes from the November 1981 level of 295.5 (the “1981 Escalation Level”) in the All Commodities Producer Price Index (with 1967 = 100 as a base). The All Commodities Producer Price Index is published by the U.S. Department of Labor, Bureau of Labor Statistics. The adjustment is made at the end of each fiscal year and is calculated on the basis of the proportion between (a) the level of such index for the November preceding the end of such fiscal year, and (b) the 1981 Escalation Level. Any action to modify or otherwise vary the compensation of the individual Trustees as provided by the Amendment must be approved by the affirmative vote of 66 2/3% in interest of the Trust Certificates then outstanding. Each of the individual Trustees received total compensation of $52,982 during fiscal 2026.

Under the Amendment, the Corporate Trustee receives annual compensation for services as a Trustee in an amount equal to the greater of (i) $20,000, or such other amount determined in accordance with the adjustments described in the preceding paragraph, or (ii) one quarter of one percent (1/4 of 1%) of the trust moneys, exclusive of proceeds of sale of any part of the Trust Estate (as such terms are defined in the Agreement of Trust), received by the Trustees and distributed to Unitholders. The compensation paid to Deutsche Bank Trust Company Americas, for services as Corporate Trustee of the Trust, under this second prong of this compensation formula was $228,616 pursuant to the Amendment.

Additionally, each year the Corporate Trustee receives $62,500 to cover clerical and administrative services to Mesabi Trust, other than services customarily performed by a registrar or transfer agent for which the Corporate Trustee is paid additional service fees. The Corporate Trustee also received $15,826 for additional service fees charged to Mesabi Trust. The Corporate Trustee earned $306,942 in cash compensation for the fiscal year ended January 31, 2026, inclusive of the $62,500 administrative fee. The Corporate Trustee also received $9,500 for its services as registrar and transfer agent for the year ended January 31, 2026. Accordingly, the Corporate Trustee earned $316,442 in total compensation for the fiscal year ended January 31, 2026.

9

Table of Contents

Under the Amendment, the Individual Trustees may, in extraordinary circumstances, pay additional compensation to the Corporate Trustee. The decision to pay such compensation must be unanimously approved by the Individual Trustees. The Corporate Trustee did not receive any compensation for extraordinary services with respect to the fiscal year ended January 31, 2026.

Trustees’ Compensation Report

The Trustees have not designated a compensation committee and are not required to do so by applicable law or regulation. The Trustees, as a group, have reviewed and discussed the Compensation Discussion and Analysis (“CD&A”) and based on such review and discussion have recommended that the CD&A be included in this Annual Report on Form 10-K for the fiscal year ended January 31, 2026.

​
​	MESABI TRUST
​	​
​	Deutsche Bank Trust Company Americas
​	Robert C. Berglund
​	James A. Ehrenberg
​	Michael P. Mlinar
​	Robin M. Radke

​

Trustee Compensation

Summary Compensation Table

The table below summarizes the total compensation earned by each of the Individual Trustees and the Corporate Trustee in the fiscal year ended January 31, 2026.

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Nonqualified

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Non-Equity

​

Deferred

​

​

​

​

​

​

​

Trustee

​

Stock

​

Option

​

Incentive Plan

​

Compensation

​

All Other

​

​

​

​

Fiscal

Fees Earned

​

Awards

​

Awards

​

Compensation

​

Earnings

​

Compensation

​

Total

Name and principal position

Year

($)

​ ​ ​

($)

​ ​ ​

($)

​ ​ ​

($)

​ ​ ​

($)

​ ​ ​

($)

​ ​ ​

($)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Deutsche Bank Trust Company Americas, Corporate Trustee

2026

$

306,942

N/A

N/A

N/A

N/A

9,500

(1)

$

316,442

​

​

2025

$

113,830

N/A

N/A

N/A

N/A

4,471

(1)

$

118,301

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Robert C. Berglund, Trustee

2026

$

52,982

N/A

N/A

N/A

N/A

N/A

​

$

52,982

​

​

2025

$

51,331

​

N/A

​

N/A

​

N/A

​

N/A

​

N/A

​

$

51,331

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

James A. Ehrenberg, Trustee

2026

$

52,982

N/A

N/A

N/A

N/A

N/A

​

$

52,982

​

​

2025

$

51,331

​

N/A

​

N/A

​

N/A

​

N/A

​

N/A

​

$

51,331

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Michael P. Mlinar, Trustee

2026

$

52,982

N/A

N/A

N/A

N/A

N/A

​

$

52,982

​

​

2025

$

51,331

​

N/A

​

N/A

​

N/A

​

N/A

​

N/A

​

$

51,331

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Robin Radke, Trustee

2026

$

52,982

N/A

N/A

N/A

N/A

N/A

​

$

52,982

​

​

2025

$

51,331

​

N/A

​

N/A

​

N/A

​

N/A

​

N/A

​

$

51,331

​

(1) Represents fees and disbursements paid to Deutsche Bank Trust Company Americas for its services as registrar and transfer agent of the Units.

​

10

Table of Contents

ITEM 12.          SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND TRUSTEES.

The table below is based on information that has been obtained from Mesabi Trust’s records and a review of statements of beneficial ownership filed with Mesabi Trust pursuant to Rule 13d-1 or Rule 13d-2 under the Securities Exchange Act of 1934, as amended, and sets forth information as to the Units of Beneficial Interest in Mesabi Trust beneficially owned as of April 22, 2026 by (i) each person known by Mesabi Trust to beneficially own more than 5% of the outstanding Units of Beneficial Interest in Mesabi Trust, and (ii) the Trustees individually and as a group. Except as otherwise indicated and subject to applicable community property laws, each Trustee has sole voting and investment powers with respect to the securities listed. There were no Certificates of Beneficial Interest of Mesabi Trust pledged by the Trustees as of January 31, 2026. The Trust does not have any compensation plans under which securities of the Trust are authorized for issuance.

​

​	​	​	​	​	​	​
​	​	​ ​ ​	Amount and	​	​
​	​	​	Nature of Beneficial	​ ​ ​	Percent of	​
Title of Class	Name and Address of Beneficial Owner (1)	​ ​ ​	Ownership	​ ​ ​	Class
​	​	​	​	​	​	​
Units	Horizon Kinetics Asset Management LLC 470 Park Avenue South 8th Floor South New York, NY 10016	​	2,999,326	(2)	22.9%	​
​	​	​	​	​	​	​
Units	ValueWorks LLC One World Trade Center Suite 84-G New York, NY 10007	​	685,846	(3)	5.2%	​
​	​	​	​	​	​	​
Units	Deutsche Bank Trust Company Americas		0		**	​
​	​	​	​	​	​	​
Units	Robert C. Berglund		2,000		**	​
​	​	​	​	​	​	​
Units	James A. Ehrenberg		3,000	(4)	**	​
​	​	​	​	​	​	​
Units	Michael P. Mlinar		4,499	(5)	**	​
​	​	​	​	​	​	​
Units	Robin M. Radke		595	​	**	​
​	​	​	​	​	​	​
Units	All Trustees as a group		10,094		**	​

** Less than 1%

​

(1) The address for each beneficial owner is c/o Deutsche Bank Trust Company Americas Corporate Trustee, 1 Columbus Circle, Mail Stop: NYC01-1710, New York, New York 10019.

(2) Based on a Schedule 13G/A filed with the SEC on October 29, 2025, Horizon Kinetics Asset Management LLC beneficially owns 2,999,326 Units and has sole voting and dispositive power over these Units.

(3) Based on a Schedule 13G/A filed with the SEC on August 8, 2025, ValueWorks LLC beneficially owns 685,846 Units and shares voting and dispositive power over these Units. Charles Lemonides is the Managing Member of ValueWorks, LLC, Mr. Lemonides has shared voting and dispositive power with respect to 685,846 Units. Mr. Lemonides disclaims beneficial ownership of the Units reported in this table except to the extent of his pecuniary interest therein.

11

Table of Contents

(4) All Units are held by James A. Ehrenberg and Donna Jean Ehrenberg Revocable Trust Dated September 12, 2012. Mr. and Mrs. Ehrenberg, as the trustees of the revocable trust, share the investment and voting power over all of those Units.

(5) All shares are held jointly with Mr. Mlinar’s spouse.

ITEM 13.          CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE.

Related Person Transaction Policy

During the fiscal year ended January 31, 2026, the Trustees met on at least a quarterly basis and reviewed and approved or ratified certain transactions that occurred during each of the prior fiscal quarters. In connection with their review of the Trust’s transactions, the Trustees consider whether there have been any related person transactions. In determining whether to approve a related person transaction, the Trustees consider the following factors, in addition to any other factors they deem necessary or appropriate:

● whether the transaction is expressly permitted by the Agreement of Trust;

● whether the terms are fair to the Trust;

● whether the transaction is material to the Trust;

● the role of the related person in arranging the related person transaction;

● the structure of the related person transaction; and

● the interests of all related persons in the related person transaction.

The Trust maintains a written related person transaction approval policy, which sets forth the Trust’s policies and procedures for the review, approval or ratification of any transaction required to be reported in Mesabi Trust’s filings with the Securities and Exchange Commission. The policy applies to any financial transaction, arrangement or relationship or any series of similar transactions, arrangements or relationships in which Mesabi Trust is a participant and in which a related person has a direct or indirect interest.

Certain types of transactions, which would otherwise require review, are pre-approved by the Trustees in accordance with the policy. These types of transactions include, for example, (i) transactions, when aggregated with the amount of all other transactions between the related person and the Trust, that involve less than $120,000 in a fiscal year; (ii) transactions where the interest of the related person arises only by way of a directorship or minority stake in another organization that is a party to the transaction; (iii) transactions with a related person involving services as a bank depositary of funds, transfer agent, registrar, trustee under a trust indenture, or similar services; and (iv) a transaction that is specifically contemplated by provisions of the Agreement of Trust.

Based on their review of the Trust’s transactions during the fiscal years ended January 31, 2026 and 2025, the Trustees concluded that there were no related person transactions required to be disclosed in this Annual Report on Form 10-K.

12

Table of Contents

Pass-Through Royalty Trust Exemptions

Because of its legal structure and character as a pass-through royalty trust, the Trust is exempt from Rule 10A-3 of the Securities Exchange Act and the Corporate Governance Standards set forth in Section 303A of the New York Stock Exchange’s Listed Company Manual.

ITEM 14.          PRINCIPAL ACCOUNTANT FEES AND SERVICES.

(a)         Audit Fees.

The aggregate fees related to fiscal 2026 for professional services rendered by Boulay, PLLP (“Boulay”) for the audit of the Trust’s annual financial statements for fiscal year 2026 and review of the financial statements included in the Trust’s quarterly reports on Form 10-Q of fiscal year 2026 were $105,000.

The aggregate fees related to fiscal 2025 for professional services rendered by Boulay for the audit of the Trust’s annual financial statements for fiscal year 2025 and review of the financial statements included in the Trust’s quarterly reports on Form 10-Q of fiscal year 2025 were $100,000.

(b)         Audit-Related Fees.

No fees were paid to Boulay for assurance and related services that were not reasonably related to the performance of the audit or review of the Trust’s financial statements for fiscal 2026 or fiscal 2025.

(c)         Tax Fees.

No fees were paid to Boulay for tax compliance, tax advice and tax planning for Mesabi Trust for fiscal 2026 or fiscal 2025.

(d)         All Other Fees.

No other fees were paid to Boulay for services provided to Mesabi Trust, other than those described in item (a), for fiscal 2026 or fiscal 2025.

Before an independent registered public accounting firm is engaged to perform audit and review services for the Trust, the Trustees approve the engagement. The Trustees approved 100% of all services provided by Boulay during fiscal 2026 and fiscal 2025.

13

Table of Contents

PART IV

ITEM 15.          EXHIBIT AND FINANCIAL STATEMENT SCHEDULES.

(a) 1.     Financial Statements:

The following Financial Statements are incorporated in this Report by reference from the following pages of the Annual Report:

Trustees’ Report on Internal Control over Financial Reporting	​ ​ ​	Page F-2
​	​	​
Report of Independent Registered Public Accounting Firm	​	Page F-3
​	​	​
Balance Sheets as of January 31, 2026 and 2025	​	Page F-4
​	​	​
Statements of Income for the years ended January 31, 2026 and 2025	​	Page F-5
​	​	​
Statements of Unallocated Reserve and Trust Corpus for the years ended January 31, 2026 and 2025	​	Page F-6
​	​	​
Statements of Cash Flows for the years ended January 31, 2026 and 2025	​	Page F-7
​	​	​
Notes to Financial Statements	​	Pages F-8 - F-14

​

14

Table of Contents

(a) 3.     Exhibits:

​

Item No.	​ ​ ​	Item	​ ​ ​	Filing Method
​	​	​	​	​
3 and 4(b)	​	Agreement of Trust dated as of July 18, 1961	​	Incorporated by reference from Exhibit 3 to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1987. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
3(a) and 4(c)	​	Amendment to the Agreement of Trust dated as of October 25, 1982	​	Incorporated by reference from Exhibit 3(a) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1988. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
4(a)	​	Instruments defining the rights of Trust Certificate Holders	​	Incorporated by reference from Exhibit 4 to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1987. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
4(d)	​	Description of Mesabi Trust’s Securities.	​	Filed herewith.
​	​	​	​	​
10(a)	​	Peters Lease	​	Incorporated by reference from Exhibits 10(a) - 10(d) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1987. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
10(b)	​	Amendment of Assignment of Peters Lease	​	Incorporated by reference from Exhibits 10(a) - 10(d) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1987. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
10(c)	​	Cloquet Lease	​	Incorporated by reference from Exhibits 10(a) - 10(d) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1987. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​

15

Table of Contents

Item No.	​ ​ ​	Item	​ ​ ​	Filing Method
​	​	​	​	​
10(d)	​	Assignment of Cloquet Lease	​	Incorporated by reference from Exhibits 10(a) - 10(d) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1987. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
10(e)	​	Modification of Lease, made as of January 23, 1946	​	Incorporated by reference from Exhibits 10(e) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015.
​	​	​	​	​
10(f)	​	Modification of Lease and Consent to Assignment dated as of October 22, 1982	​	Incorporated by reference from Exhibit 10(e) to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 1988. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
10(g)	​	Amendment of Assignment, Assumption and Further Assignment of Peters Lease	​	Incorporated by reference from Exhibit A to Mesabi Trust’s Report on Form 8-K dated August 17, 1989. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
10(h)	​	Amendment of Assignment, Assumption and Further Assignments of Cloquet Lease	​	Incorporated by reference from Exhibit B to Mesabi Trust’s Report on Form 8-K dated August 17, 1989. (filed on paper – hyperlink is not required pursuant to Rule 105 of Regulation S-T)
​	​	​	​	​
10(i)*	​	Summary Description of Trustees’ Compensation	​	Filed herewith.
​	​	​	​	​
13	​	Annual Report of the Trustees of Mesabi Trust for the fiscal year ended January 31, 2026	​	Filed herewith.
​	​	​	​	​
14	​	Trustees Code of Ethics	​	Incorporated by reference from Exhibit 14 to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 2004.
​	​	​	​	​

16

Table of Contents

Item No.	​ ​ ​	Item	​ ​ ​	Filing Method
​	​	​	​	​
31	​	Certification of Corporate Trustee of Mesabi Trust pursuant to Rule 13a-14 of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	​	Filed herewith.
​	​	​	​	​
32	​	Certification of Corporate Trustee of Mesabi Trust pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	​	Filed herewith.
​	​	​	​	​
97	​	Mesabi Trust Incentive Based Award Recovery Policy	​	Incorporated by reference from Exhibit 97 to Mesabi Trust’s Annual Report on Form 10-K for the fiscal year ended January 31, 2024.
​	​	​	​	​
101.INS	​	Inline XBRL Instance Document	​	Filed herewith.
​	​	​	​	​
101.SCH	​	Inline XBRL Taxonomy Extension Schema	​	Filed herewith.
​	​	​	​	​
101.CAL	​	Inline XBRL Taxonomy Extension Calculation Linkbase	​	Filed herewith.
​	​	​	​	​
101.LAB	​	Inline XBRL Taxonomy Extension Label Linkbase	​	Filed herewith.
​	​	​	​	​
101.PRE	​	Inline XBRL Taxonomy Extension Presentation Linkbase	​	Filed herewith.
​	​	​	​	​
101.DEF	​	Inline XBRL Taxonomy Extension Definition Linkbase	​	Filed herewith.
​	​	​	​	​
104	​	Cover Page Interactive Data File	​	Embedded within the Inline XBRL document and contained in Exhibit 101

​

* Indicates a compensatory plan or arrangement.

ITEM 16.          FORM 10-K SUMMARY.

​

None.

​

​

17

Table of Contents

SIGNATURES

​

Pursuant to the requirements of Section 13 or 15(d) 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, thereunto duly authorized.

​

Dated: April 22, 2026

​

​	​	​
​	​ ​ ​	MESABI TRUST
​	​	​
​	​	​
​	​	By:	DEUTSCHE BANK TRUST COMPANY
​	​	​	AMERICAS
​	​	​	Corporate Trustee
​	​	​
​	​	​
​	​	​	Principal Administrative Officer and duly authorized signatory:*
​	​	​
​	​	​
​	​	​	By:	/s/ Chris Niesz
​	​	​	​	Chris Niesz*
​	​	​	​	Director

* There are no principal executive officers or principal financial officers of the registrant.

​

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

​

/s/ Robert C. Berglund	​ ​ ​	April 22, 2026
Robert C. Berglund	​	​
Individual Trustee	​	​
​	​	​
/s/ James A. Ehrenberg	​	April 22, 2026
James A. Ehrenberg	​	​
Individual Trustee	​	​
​	​	​
/s/ Chris Niesz	​	April 22, 2026
Chris Niesz	​	​
Director	​	​
Deutsche Bank Trust Company Americas,	​	​
As Corporate Trustee of Mesabi Trust	​	​
​	​	​
​	​	​
/s/ Michael P. Mlinar	​	April 22, 2026
Michael P. Mlinar	​	​
Individual Trustee	​	​
​	​	​
/s/ Robin M. Radke	​	April 22, 2026
Robin M. Radke	​	​
Individual Trustee	​	​

​

​

​

​

​

​

​

​

18