Quick Takeaways
- This page summarizes William W. McMullen's Form 4 filing for MACH NATURAL RESOURCES LP (MNR).
- 3 reported transactions and 0 derivative rows are listed below.
- Filing timestamp: 23 Mar 2026, 16:05.
William W. McMullen - 19 Mar 2026 Form 4 Insider Report for MACH NATURAL RESOURCES LP (MNR)
- Signature
- William W. McMullen, By: /s/ William W. McMullen
- Issuer symbol
- MNR
- Transactions as of
- 19 Mar 2026
- Net transactions value
- +$128,800
- Form type
- 4
- Filing time
- 23 Mar 2026, 16:05:11 UTC
- Previous filing
- 10 Dec 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"William W. McMullen filed Form 4 for MACH NATURAL RESOURCES LP (MNR) on 23 Mar 2026."
What Changed
- Previous filing in this sequence was filed on 10 Dec 2025.
- Current net transaction value: +$128,800.
Why This Matters
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Official SEC Source
Reporting Owners (3)
| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| McMullen William Wallace | Director, Other*, 10%+ Owner | 14201 WIRELESS WAY, SUITE 300, OKLAHOMA CITY | William W. McMullen, By: /s/ William W. McMullen | 23 Mar 2026 | 0001730172 |
| BCE-Mach Aggregator LLC | 10%+ Owner | C/O BAYOU CITY ENERGY, L.P., 2229 SAN FELIPE STREET, SUITE 1075, HOUSTON | BCE-Mach Aggregator LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Authorized Signatory | 23 Mar 2026 | 0001997530 |
| BAYOU CITY ENERGY MANAGEMENT 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 | 23 Mar 2026 | 0001742941 |
Transactions Table
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MNR | Common Units | Purchase | $49,980 | +3,570 | +0% | $14.00 | 74,854,202 | 19 Mar 2026 | See footnote | F1, F2, F4 |
| transaction | MNR | Common Units | Purchase | $35,000 | +2,500 | +0% | $14.00 | 74,856,702 | 20 Mar 2026 | See footnote | F1, F4 |
| transaction | MNR | Common Units | Purchase | $43,820 | +3,215 | +0% | $13.63 | 74,859,917 | 23 Mar 2026 | See footnote | F1, F3, F4 |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.
Explanation of Responses:
| Id | Content |
|---|---|
| F1 | These common units were purchased by Bayou City Energy Management LLC ("BCEM"). |
| F2 | The price reported in Column 4 is a weighted average price. These common units were purchased by BCEM in multiple transactions at prices ranging from $13.99 to $14.00, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), 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 BCEM in multiple transactions at prices ranging from $13.535 to $13.65, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), 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 Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.