[Form 4] MACH NATURAL RESOURCES LP Insider Trading Activity

Rhea-AI Filing Summary

Mach Natural Resources LP insider entities reported a small open-market purchase of common units. On 11/14/2025, Bayou City Energy Management LLC acquired 4,608 common units of Mach Natural Resources LP at a weighted average price of $11.85 per unit, through multiple trades between $11.84 and $11.87. After this transaction, the reporting group reports 74,820,632 common units beneficially owned, held indirectly through BCE-Mach Aggregator LLC and Bayou City Energy Management LLC. The reporting persons, including BCE-Mach Aggregator LLC, Bayou City Energy Management LLC and William W. McMullen, are listed as 10% owners, and one reporting person is also a director of the general partner that manages the issuer.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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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^*

McMullen William Wallace

(Last) (First) (Middle)

14201 WIRELESS WAY

SUITE 300

(Street)

OKLAHOMA CITY OK 73134

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MACH NATURAL RESOURCES LP [ MNR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Units	11/14/2025		P		4,608(1)	A	$11.85(2)	74,820,632(3)	I	See footnote(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

McMullen William Wallace

(Last) (First) (Middle)

14201 WIRELESS WAY

SUITE 300

(Street)

OKLAHOMA CITY OK 73134

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

X	Director	X	10% Owner
	Officer (give title below)	X	Other (specify below)
			See Remarks

1. Name and Address of Reporting Person^*

BCE-Mach Aggregator LLC

(Last) (First) (Middle)

C/O BAYOU CITY ENERGY, L.P.

2229 SAN FELIPE STREET, SUITE 1075

(Street)

HOUSTON TX 77019

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

BAYOU CITY ENERGY MANAGEMENT LLC

(Last) (First) (Middle)

C/O BAYOU CITY ENERGY, L.P.

2229 SAN FELIPE STREET, SUITE 1075

(Street)

HOUSTON TX 77019

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

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

2. 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 $11.84 to $11.87, 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.

3. After the reported transactions, the reported common units are directly held 74,805,939 by BCE-Mach Aggregator LLC ("BCE Aggregator") and 14,693 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.

	BCE-Mach Aggregator LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Authorized Signatory	11/18/2025
	Bayou City Energy Management LLC, By: /s/ William W. McMullen, Name: William W. McMullen, Title: Managing Partner	11/18/2025
	William W. McMullen, By: /s/ William W. McMullen	11/18/2025
	** Signature of Reporting Person	Date
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.

FAQ

What insider transaction did Mach Natural Resources LP (MNR) report on this Form 4?

The filing reports that Bayou City Energy Management LLC purchased 4,608 common units of Mach Natural Resources LP on 11/14/2025 in an open-market transaction.

What was the purchase price for the Mach Natural Resources LP (MNR) common units?

The 4,608 common units were bought at a weighted average price of $11.85 per unit, with individual trades executed between $11.84 and $11.87.

How many Mach Natural Resources LP (MNR) units do the reporting persons beneficially own after this transaction?

Following the reported purchase, the reporting persons disclose beneficial ownership of 74,820,632 common units of Mach Natural Resources LP, held indirectly through entities they manage.

Which entities are involved as reporting persons in this Mach Natural Resources LP (MNR) Form 4?

The reporting persons are BCE-Mach Aggregator LLC, Bayou City Energy Management LLC, and William W. McMullen, with interests in the units held by BCE-Mach Aggregator LLC and Bayou City Energy Management LLC.

What roles do the reporting persons have in relation to Mach Natural Resources LP (MNR)?

One reporting person is a director of Mach Natural Resources GP LLC, the general partner of the issuer, and the reporting group is identified as a 10% owner of Mach Natural Resources LP.

How are the Mach Natural Resources LP (MNR) units held by the reporting persons structured?

After the transaction, 74,805,939 common units are directly held by BCE-Mach Aggregator LLC and 14,693 common units are directly held by Bayou City Energy Management LLC, with beneficial ownership attributed through management relationships.

Do the reporting persons disclaim any beneficial ownership of Mach Natural Resources LP (MNR) units?

The reporting persons state that they may be deemed to beneficially own the units held by BCE-Mach Aggregator LLC and Bayou City Energy Management LLC, but disclaim beneficial ownership except to the extent of their respective pecuniary interests.