William W. McMullen - Aug 11, 2025 Form 4 Insider Report for MACH NATURAL RESOURCES LP (MNR)

Role: Director, Other*, 10%+ Owner
Signature: BCE-Mach Aggregator LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Authorized Signatory
Stock symbol: MNR
Transactions as of: Aug 11, 2025
Transactions value $: $44,393
Form type: 4
Date filed: 8/12/2025, 08:00 AM
Previous filing: Jun 17, 2025
SEC: View on sec.gov

Reporting Owners (3)

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	2025-08-12	0001730172
BCE-Mach Aggregator LLC	10%+ Owner	C/O BAYOU CITY ENERGY, L.P., 1201 LOUISIANA STREET SUITE 3308, HOUSTON	Bayou City Energy Management LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Managing Partner	2025-08-12	0001997530
BAYOU CITY ENERGY MANAGEMENT LLC	10%+ Owner	C/O BAYOU CITY ENERGY, L.P., 1201 LOUISIANA STREET SUITE 3308, HOUSTON	William W. McMullen, By: /s/ William W. McMullen	2025-08-12	0001742941

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MNR	Common Units	Purchase	$44.4K	+3.09K	+0%	$14.39	74.8M	Aug 11, 2025	See footnote	F1, F2

* 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	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.

Content

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

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.