| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| McMullen William Wallace | Director, Other*, 10%+ Owner | 14201 WIRELESS WAY SUITE 300, OKLAHOMA CITY | BCE-Mach Aggregator LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Authorized Signatory | 10 Dec 2025 | 0001730172 |
| BCE-Mach Aggregator LLC | 10%+ Owner | C/O BAYOU CITY ENERGY, L.P., 2229 SAN FELIPE STREET, SUITE 1075, HOUSTON | Bayou City Energy Management LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Managing Partner | 10 Dec 2025 | 0001997530 |
| BAYOU CITY ENERGY MANAGEMENT LLC | 10%+ Owner | C/O BAYOU CITY ENERGY, L.P., 2229 SAN FELIPE STREET, SUITE 1075, HOUSTON | William W. McMullen, By: /s/ William W. McMullen | 10 Dec 2025 | 0001742941 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MNR | Common Units | Purchase | $156,625 | +12,500 | +0.02% | $12.53 | 74,833,132 | 08 Dec 2025 | See footnote | F1, F2, F4 |
| transaction | MNR | Common Units | Purchase | $215,600 | +17,500 | +0.02% | $12.32 | 74,850,632 | 09 Dec 2025 | See footnote | F1, F3, F4 |
| Id | Content |
|---|---|
| F1 | These common units were purchased by BCE-Mach Aggregator LLC ("BCE Aggregator"). |
| F2 | The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $12.44 to $12.67, inclusive. The Reporting Persons undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (2) to this Form 4. |
| F3 | The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $12.30 to $12.35, inclusive. The Reporting Persons undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (3) to this Form 4. |
| F4 | After the reported transactions, the reported common units are directly held 74,835,939 by BCE Aggregator and 14,693 by Bayou City Energy Management LLC ("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. |
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.