# EDGAR Filing Document

**Accession Number:** 0000310051
**File Stem:** 0000310051-23-000004
**Filing Date:** 2023-2
**Character Count:** 10902
**Document Hash:** 1bfc9dd723a845021371e1f7c48422e7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000310051-23-000004.hdr.sgml**: 20230202

**ACCESSION NUMBER**: 0000310051-23-000004

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230131

**FILED AS OF DATE**: 20230202

**DATE AS OF CHANGE**: 20230202

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KING LUTHER CAPITAL MANAGEMENT CORP
- **CENTRAL INDEX KEY:** 0000310051
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41605
- **FILM NUMBER:** 23582253

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 8173323235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Investment Partnership, L.P.
- **CENTRAL INDEX KEY:** 0001406371
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41605
- **FILM NUMBER:** 23582251

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Private Discipline Master Fund, SPC
- **CENTRAL INDEX KEY:** 0001406372

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41605
- **FILM NUMBER:** 23582252

**BUSINESS ADDRESS:**
- **STREET 1:** PO BOX 309GT
- **STREET 2:** UGLAND HOUSE, SOUTH CHURCH STREET
- **CITY:** GRAND CAYMAN
- **STATE:** E9
- **ZIP:** 00000
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 309GT
- **STREET 2:** UGLAND HOUSE, SOUTH CHURCH STREET
- **CITY:** GRAND CAYMAN
- **STATE:** E9
- **ZIP:** 00000
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TXO Energy Partners, L.P.
- **CENTRAL INDEX KEY:** 0001559432
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **IRS NUMBER:** 320368858
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 400 WEST 7TH STREET
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-334-7800

**MAIL ADDRESS:**
- **STREET 1:** 400 WEST 7TH STREET
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MorningStar Partners, L.P.
- **DATE OF NAME CHANGE:** 20121002

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KING LUTHER CAPITAL MANAGEMENT CORP<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-01-31 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>TXO Energy Partners, L.P. [ TXO ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Private Discipline Master Fund, SPC<br><sub>(Last) (First) (Middle)</sub><br>PO BOX 309GT<br>UGLAND HOUSE, SOUTH CHURCH STREET<br><sub>(Street)</sub><br>GRAND CAYMAN, E9 00000<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-01-31 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>TXO Energy Partners, L.P. [ TXO ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Investment Partnership, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-01-31 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>TXO Energy Partners, L.P. [ TXO ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Units | 2023-01-31 |  | C |  | 1065798 | A | <sup>(1)</sup> | 2561530<sup>(2)(3)</sup> | I | By MorningStar Partners II, L.P. |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Series 5 Preferred Units | <sup>(1)</sup> | 2023-01-31 |  | C |  |  | 207.6316 | <sup>(1)</sup> | 2024-10-15 | Common Units | 1065798 | $0 | 0 | I | See footnotes<sup>(4)(5)(6)</sup> |

---

### Footnotes:

(1) 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.

(2) Reflects securities acquired in a transaction exempt from reporting pursuant to Rule 16a-13.

(3) 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.

(4) 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.

(5) 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.

(6) 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.

**Signature:** Jacob D. Smith, Principal and General Counsel for Luther King Capital Management Corporation  
**Date:** 2023-02-02

**Signature:** Jacob D. Smith, Principal and General Counsel for LKCM Private Discipline Master Fund, SPC  
**Date:** 2023-02-02

**Signature:** Jacob D. Smith, Vice President and General Counsel of the General Partner of LKCM Investment Partnership, L.P.  
**Date:** 2023-02-02

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**