# EDGAR Filing Document

**Accession Number:** 0001730172
**File Stem:** 0001213900-25-074636
**Filing Date:** 2025-8
**Character Count:** 9808
**Document Hash:** 918e235e7c66ae49889764e939e74a31
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-074636.hdr.sgml**: 20250812

**ACCESSION NUMBER**: 0001213900-25-074636

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250811

**FILED AS OF DATE**: 20250812

**DATE AS OF CHANGE**: 20250812

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** McMullen William Wallace
- **CENTRAL INDEX KEY:** 0001730172

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41849
- **FILM NUMBER:** 251204098

**MAIL ADDRESS:**
- **STREET 1:** 1201 LOUISIANA STREET
- **STREET 2:** SUITE 3308
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BCE-Mach Aggregator LLC
- **CENTRAL INDEX KEY:** 0001997530

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41849
- **FILM NUMBER:** 251204097

**BUSINESS ADDRESS:**
- **STREET 1:** 14201 WIRELESS WAY, SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134
- **BUSINESS PHONE:** 405-252-8100

**MAIL ADDRESS:**
- **STREET 1:** 14201 WIRELESS WAY, SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BAYOU CITY ENERGY MANAGEMENT LLC
- **CENTRAL INDEX KEY:** 0001742941

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41849
- **FILM NUMBER:** 251204096

**BUSINESS ADDRESS:**
- **STREET 1:** 1201 LOUISIANA STREET, SUITE 3308
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
- **BUSINESS PHONE:** (713) 400-8200

**MAIL ADDRESS:**
- **STREET 1:** 1201 LOUISIANA STREET, SUITE 3308
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77002
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MACH NATURAL RESOURCES LP
- **CENTRAL INDEX KEY:** 0001980088
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 14201 WIRELESS WAY, SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134
- **BUSINESS PHONE:** (405) 252-8100

**MAIL ADDRESS:**
- **STREET 1:** 14201 WIRELESS WAY, SUITE 300
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73134

### 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>McMullen William Wallace<br><sub>(Last) (First) (Middle)</sub><br>14201 WIRELESS WAY<br>SUITE 300<br><sub>(Street)</sub><br>OKLAHOMA CITY, OK 73134<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [X] Other (specify below)<br>_See Remarks_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>MACH NATURAL RESOURCES LP [ MNR ] | **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>BCE-Mach Aggregator LLC<br><sub>(Last) (First) (Middle)</sub><br>C/O BAYOU CITY ENERGY, L.P.<br>1201 LOUISIANA STREET SUITE 3308<br><sub>(Street)</sub><br>HOUSTON, TX 77002<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-11 | **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>MACH NATURAL RESOURCES LP [ MNR ] | **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>BAYOU CITY ENERGY MANAGEMENT LLC<br><sub>(Last) (First) (Middle)</sub><br>C/O BAYOU CITY ENERGY, L.P.<br>1201 LOUISIANA STREET SUITE 3308<br><sub>(Street)</sub><br>HOUSTON, TX 77002<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-11 | **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>MACH NATURAL RESOURCES LP [ MNR ] | **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 | 2025-08-11 |  | P |  | 3085<sup>(1)</sup> | A | $14.39 | 74816024<sup>(2)</sup> | I | See footnote<sup>(2)</sup> |

---

## 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 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) These common units were purchased by Bayou City Energy Management LLC ("BCEM").

(2) After the reported transactions, the reported common units are directly held 74,805,939 by BCE-Mach Aggregator LLC ("BCE Aggregator") and 10,085 by BCEM. BCE Aggregator is indirectly managed by BCEM. William W. McMullen is the Managing Partner of BCEM. Accordingly, each of the Reporting Persons may be deemed to beneficially own the securities directly held by BCE Aggregator and BCEM, as applicable, but disclaim beneficial ownership of such common units except to the extent of their respective pecuniary interest therein.

**Remarks:**
The Reporting Person is a Director of Mach Natural Resources GP LLC, the general partner of the Issuer (the "General Partner"). The Issuer is managed by the directors and executive officers of the General Partner.

**Signature:** BCE-Mach Aggregator LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Authorized Signatory  
**Date:** 2025-08-12

**Signature:** Bayou City Energy Management LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Managing Partner  
**Date:** 2025-08-12

**Signature:** William W. McMullen, By: /s/ William W. McMullen  
**Date:** 2025-08-12

### 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.**