X0306 4 2023-01-31 0 0001559432 TXO Energy Partners, L.P. TXO 0000310051 KING LUTHER CAPITAL MANAGEMENT CORP 301 COMMERCE SUITE 1600 FORT WORTH TX 76102 0 0 1 0 0001406372 LKCM Private Discipline Master Fund, SPC PO BOX 309GT UGLAND HOUSE, SOUTH CHURCH STREET GRAND CAYMAN E9 00000 CAYMAN ISLANDS 0 0 1 0 0001406371 LKCM Investment Partnership, L.P. 301 COMMERCE STREET SUITE 1600 FORT WORTH TX 76102 0 0 1 0 Common Units 2023-01-31 4 C 0 1065798 A 2561530 I By MorningStar Partners II, L.P. Series 5 Preferred Units 2023-01-31 4 C 0 207.6316 0 D 2024-10-15 Common Units 1065798 0 I See footnotes Immediately prior to the closing of the Issuer's initial public offering, the Issuer's Series 5 preferred units automatically converted into common units of the Issuer. Reflects securities acquired in a transaction exempt from reporting pursuant to Rule 16a-13. Reflects the number of common units beneficially owned following a 1-for-25.33 reverse unit split effected by the Issuer on January 31, 2023, which was exempt from reporting pursuant to Rule 16a-9. The securities reported include (1) 507,909 common units underlying Series 5 preferred units held by LKCM Investment Partnership, L.P. and (ii) 557,889 common units underlying Series 5 preferred units held by PDLP Morningstar, LLC. LKCM Investment Partnership GP, LLC (LIP GP) is the general partner of LKCM Investment Partnership, L.P. (LIP). LKCM Private Discipline Management, L.P. (PDP GP) is the sole holder of management shares of LKCM Private Discipline Master Fund, SPC (PDP). PDLP Morningstar, LLC (PDLP Morningstar) is a wholly owned subsidiary of PDP. Luther King Capital Management Corporation (LKCM) serves as the investment adviser to each of LIP and PDP. J. Luther King, Jr. serves as the President of LKCM. LKCM has voting and investment power over the securities beneficially owned by each of LIP and PDP. Accordingly, each of J. Luther King, Jr. and LKCM may be deemed to be the beneficial owners of the Series 5 preferred units held by each of LIP and PDP, but each disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. Jacob D. Smith, Principal and General Counsel for Luther King Capital Management Corporation 2023-02-02 Jacob D. Smith, Principal and General Counsel for LKCM Private Discipline Master Fund, SPC 2023-02-02 Jacob D. Smith, Vice President and General Counsel of the General Partner of LKCM Investment Partnership, L.P. 2023-02-02