SCHEDULE 13D/A 0001606914 XXXXXXXX LIVE 5 Common Stock, par value $0.001 per share 02/11/2026 false 0001997652 87507T101 Tamboran Resources Corporation

Suite 01, Level 39, Tower One, I.T.S. 100 Barangaroo Avenue New South Wales C3 2000

Bryan Sheffield 737-304-7803 300 Colorado Street Suite 1900 Austin TX 78701 0001606914 N Bryan Sheffield OO N X1 133655 3123601.00 133655 3123601.00 3257256 N 14.4 IN 0002027828 N Sheffield Holdings, LP OO N TX 0.00 2247404.00 0.00 2247404.00 2247404.00 N 9.9 PN 0002027822 N Spraberry Interests, LLC OO N DE 0.00 2247404.00 0.00 2247404.00 2247404.00 N 9.9 OO 0002027837 N Daly Waters Energy, LP OO N DE 0.00 876197.00 0.00 876197.00 876197.00 N 3.9 PN 0002027922 N Formentera Australia Fund I GP, LP OO N DE 0.00 876197.00 0.00 876197.00 876197.00 N 3.9 PN 0002027820 N Formentera Investments LLC OO N DE 0.00 876197.00 0.00 876197.00 876197.00 N 3.9 OO Common Stock, par value $0.001 per share Tamboran Resources Corporation Suite 01, Level 39, Tower One, I.T.S. 100 Barangaroo Avenue New South Wales C3 2000 This Amendment No. 5 ("Amendment No. 5") amends and supplements the statement on Schedule 13D filed by the undersigned on July 8, 2024 (the "Original Schedule 13D"), as amended by Amendment No. 1 filed on May 14, 2025 ("Amendment No. 1"), Amendment No. 2 filed on July 23, 2025 ("Amendment No. 2"), Amendment No. 3 filed on July 29, 2025 ("Amendment No. 3"), and Amendment No. 4 filed on November 17, 2025 ("Amendment No. 4", together with the Original Schedule 13D, Amendment No. 1, Amendment No. 2, and Amendment No. 3, the "Schedule 13D") as specifically set forth herein. Amendment No. 5 is filed by (i) Bryan Sheffield, (ii) Sheffield Holdings, LP, a Texas limited partnership ("Sheffield Holdings"), (iii) Spraberry Interests, LLC, a Delaware limited liability company ("Spraberry"), (iv) Daly Waters Energy, LP, a Delaware limited partnership ("Daly Waters"), (v) Formentera Australia Fund I GP, LP, a Delaware limited partnership ("Formentera Australia"), and (vi) Formentera Investments LLC, a Delaware limited liability company ("Formentera Investments"), (each, a "Reporting Person" and, collectively, the "Reporting Persons"), relating to the shares of the common stock, par value $0.001 per share (the "Common Stock"), of Tamboran Resources Corporation, a Delaware corporation (the "Issuer"). Capitalized terms used herein and not otherwise defined in this Amendment No. 5 have the meanings set forth in the Schedule 13D. Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows: The information set forth in Item 11 and Item 13 on each of the cover pages of this Amendment No. 5 are incorporated by reference into this Item 5(a). Sheffield Holdings is the record holder of 2,247,404 shares of Common Stock. Spraberry is the general partner of Sheffield Holdings. Bryan Sheffield is the manager of Spraberry. As a result, each of Mr. Sheffield and Spraberry may be deemed to share beneficial ownership of the shares held directly by Sheffield Holdings. In addition to the shares held by Sheffield Holdings, Mr. Sheffield, as investment trustee, may be deemed to beneficially own shares held by the Bryan S. Sheffield Spousal Lifetime Access Trust ("BSS SLAT"). In this regard, after giving effect to closing of the Subscription on January 16, 2026, BSS SLAT is the record holder of 133,655 shares of Common Stock, which shares were previously included in Mr. Sheffield's beneficial ownership in Amendment No. 4. Daly Waters is the record holder of 876,197 shares of Common Stock. Formentera Australia is the general partner of Daly Waters. Formentera Investments is the general partner of Formentera Australia. Bryan Sheffield is the managing member of Formentera Investments. As a result, each of Mr. Bryan Sheffield, Formentera Australia and Formentera Investments may be deemed to share beneficial ownership of the shares held directly by Daly Waters. The information set forth in Items 7-10 on each of the cover pages of this Amendment No. 5 are incorporated by reference into this Item 5(b). References herein to percentage ownerships of Common Stock are based on 22,639,513 shares of Common Stock of the Issuer issued and outstanding as of February 1, 2026, as set forth in the Issuer's Quarterly Report on Form 10-Q for the quarter ended December 31, 2025, which was filed with the Commission on February 11, 2026. In this regard, this Amendment No. 5 is being filed to report a greater than 1% decrease in certain of the Reporting Persons' beneficial ownership that was due solely to the increase in outstanding shares of Common Stock as disclosed by the Issuer. Except as otherwise disclosed in this Amendment No. 5, the Reporting Persons have effected no transactions in Common Stock within the prior 60 days. None N/A Bryan Sheffield /s/ Bryan Sheffield 02/13/2026 Sheffield Holdings, LP /s/ Bryan Sheffield 02/13/2026 Spraberry Interests, LLC /s/ Bryan Sheffield 02/13/2026 Daly Waters Energy, LP /s/ Bryan Sheffield 02/13/2026 Formentera Australia Fund I GP, LP /s/ Bryan Sheffield 02/13/2026 Formentera Investments LLC /s/ Bryan Sheffield 02/13/2026 Sheffield Holdings, LP By: Spraberry Interests, LLC, its general partner Daly Waters Energy, LP By: Formentera Australia Fund I GP, LP, its general partner By: Formentera Investments LLC, its general partner Formentera Australia Fund I GP, LP By: Formentera Investments LLC, its general partner