SCHEDULE 13D/A 0001785185-19-000003 0001785185 XXXXXXXX LIVE 4 Common Stock 11/28/2025 false 0001445942 882672108 Texas Mineral Resources Corp.

527 21st Street #44 Galveston TX 77550

Bernard Masters 505-787-9299 4801 N. Butler Ave. Suite 12000 Farmington CO 87401 0001785185 N Navajo Transitional Energy Company, LLC b WC N NM 0.00 9361883.00 0.00 9361883.00 9361883.00 N 11.5 OO Navajo Transitional Energy Company, LLC is a limited liability company formed under the laws of the Navajo Nation. 0001705977 N Lund LaVern K b OO N X1 176085.00 9361883.00 176085.00 9361883.00 9537968.00 N 11.7 IN 0001840200 N Denetclaw Peter Jr. b OO N X1 163289.00 9361883.00 163289.00 9361883.00 9525172.00 N 11.7 IN Common Stock Texas Mineral Resources Corp. 527 21st Street #44 Galveston TX 77550 This Amendment No. 4 (Amendment No. 4") amends and supplements the statements on Schedule 13D filed with the Securities and Exchange Commission ("SEC") on August 13, 2019 (the "Original Schedule 13D") as amended by Amendment No. 1 filed on filed on January 30, 2025, by Amendment No. 2 filed on February 3, 2025, and by Amendment No.3 filed on October 22, 2025, with respect to the Common Stock, par value $0.01 (the "Common Stock") of Texas Mineral Resources Corp., a Delaware corporation (the "Issuer"). The Original Schedule 13D, as amended by Amendment No. 1, Amendment No. 2, and Amendment No. 3 is referred to herein as the "Amended Schedule 13D", and the Amended Schedule 13D, as amended by this Amendment No. 4, is referred to herein as the "Schedule 13D/A. Capitalized terms used herein and not otherwise defined in this Amendment No. 4 have the meanings set forth in the Amended Schedule 13D. This Amendment No. 4 amends Item 5 as set forth below. The first two sentences of Item 5(a) are hereby amended and restated to read as follows:(a) The aggregate number and percentage of shares of Common Stock to which this Schedule 13D/A relates to is 9,701,257 shares of Common Stock, constituting approximately 12% of the currently outstanding Common Stock of the Issuer. The aggregate number of and percentage of shares of Common Stock reported herein are based upon the 81,335,813 shares of Common Stock outstanding as of November 25, 2025, as reported in the Annual Report of the Issuer on Form 10-K for the fiscal year ended August 31, 2025. Item 5(b) is amended and restated in its entirety to read as follows: NTEC: As of the date hereof, NTEC may be deemed to be the beneficial owner of 9,361,883 shares of Common Stock, equal to 11.5% of the outstanding Common Stock, as follows: i) Sole power to vote or direct the vote: 0 ii) Shared power to vote or direct the vote: 9,361,883 shares iii) Sole power to dispose or direct the disposition: 0 iv) Shared power to dispose or direct the disposition: 9,361,883 shares LaVern K. Lund: As of the date hereof, Mr. Lund may be deemed to be the beneficial owner of 9,537,968 shares of Common Stock, equal to 11.7% of the outstanding Common Stock, as follows: i) Sole power to vote or direct the vote: 176,085 shares ii) Shared power to vote or direct the vote: 9,361,883 shares iii) Sole power to dispose or direct the disposition: 176,085 shares iv) Shared power to dispose or direct the disposition: 9,361,883 shares Peter Denetclaw, Jr.: As of the date hereof, Mr. Denetclaw may be deemed to be the beneficial owner of 9,525,172 shares of Common Stock, equal to 11.7% of the outstanding Common Stock, as follows: i) Sole power to vote or direct the vote: 163,289 shares ii) Shared power to vote or direct the vote: 9,361,883 shares iii) Sole power to dispose or direct the disposition: 163,289 shares iv) Shared power to dispose or direct the disposition: 9,361,883 shares Item 5(c) is amended and restated in its entirety to read as follows: Navajo Transitional Energy Company, LLC sold 750,000 shares of Common Stock in open market brokerage transactions in three transactions as follows: i. On October 28, 2025, 69,631 shares of Common Stock at a selling price of $1.3080 per share; ii. On October 29, 2025, 315,369 shares of Common Stock at a selling price of $1.1310 per share; iii. On October 30, 2025 365,000 shares of Common Stock at a selling price of $1.0385 per share; No other transactions in shares of Common Stock were purchased or sold by NTEC, Mr. Lund, or Mr. Denetclaw during the past 60 days. Navajo Transitional Energy Company, LLC LaVern K Lund 12/02/2025 Lund LaVern K LaVern K Lund 12/02/2025 Denetclaw Peter Jr. Peter Denetclaw Jr. 12/02/2025