X0202 SCHEDULE 13G 0002137750 XXXXXXXX LIVE Royalty Trust Units 05/28/2026 0001565146 Gulf Coast Ultra Deep Royalty Trust 40222T104 601 TRAVIS STREET 16TH FLOOR HOUSTON TX 77002 Rule 13d-1(c) Galluccio Thomas Gregory b X1 10397661.00 2533230.00 10397661.00 2533230.00 12930891.00 5.6 IN Gulf Coast Ultra Deep Royalty Trust 601 TRAVIS STREET, 16TH FLOOR, HOUSTON, TEXAS, 77002. Thomas Gregory Galluccio 402 Montpelier Drive Southlake, Texas 76092 United States Y 12,930,891 Royalty Trust Units 5.6% (calculated based on 230,172,696 Royalty Trust Units outstanding as reported in the Issuer's Form 10-Q for the quarter ended March 31, 2026) 10,397,661 2,533,230 10,397,661 2,533,230 Y N N The Royalty Trust Units reported in this Schedule include 2,533,230 Units held by the Teresa Galluccio 2013 Family Trust (the "Trust"). The Reporting Person serves as co-trustee of the Trust together with Nicola F. Galluccio and accordingly shares voting and dispositive power over the Trust's Units. The beneficiaries of the Trust are entitled to the economic interest in the Units held by the Trust in accordance with the terms of the Trust instrument. The Reporting Person is one of three beneficiaries of the Trust. The Reporting Person disclaims beneficial ownership of the Royalty Trust Units held by the Trust pursuant to Rule 13d-4 under the Securities Exchange Act of 1934, except to the extent of his pecuniary interest therein, if any. The inclusion of the Trust's Royalty Trust Units in this Schedule shall not be deemed an admission that the Reporting Person is the beneficial owner of such Royalty Trust Units for purposes of Section 13(d) of the Securities Exchange Act of 1934 or for any other purpose. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Galluccio Thomas Gregory Thomas Gregory Galluccio 06/02/2026