MSB: 10-Q financial filing

MESABI TRUST_April 30, 2026 Table of Contents hh ​ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ​ FORM 10-Q ​ (Mark One) ​ ​ ​ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 ​ For the quarterly period ended April 30, 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 incorporation or organization) ​ (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) Not applicable (Former name, former address and former fiscal year, if changed since last report) Securities registered pursuant to Section 12(b) of the Act : Title of each class Trading Symbol 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 (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 ch