UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, ~~D.C.~~DC 20549

FORM 8-K

~~CURRENT~~Current ~~REPORT~~Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

~~PURSUANT~~Date TOof ~~SECTION~~report 13(Date ORof ~~15(d~~earliest event reported): April 6, 2026

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): March 12, 2026

Mach Natural Resources LP

(Exact name of registrant as specified in its charter)

Delaware		001-41849		93-1757616
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

14201 Wireless Way, Suite 300, Oklahoma City, Oklahoma		73134
(Address of principal executive offices)		(Zip Code)

(405) 252-8100

Registrant’s telephone number, including area code

Not applicable.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol~~(s)~~ Name of ~~each~~ exchange on which registered Common units representing limited partner interests MNR New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒

~~Item~~EXPLANATORY ~~2.02. Results of Operations and Financial Condition.~~NOTE

OnAs previously disclosed, on ~~March~~September 1216, ~~2026~~2025, Mach Natural Resources LP (the “Company”) ~~issued~~completed athe ~~press~~acquisition ~~release~~of (~~the~~i) ~~“Press~~certain ~~Release”)~~rights, ~~providing~~title and interests ~~information~~in onoil ~~its~~and ~~results~~gas ofproperties, ~~operations~~rights and ~~financial~~related ~~condition~~assets ~~and~~located ~~reserves~~in ~~for~~certain designated lands in the ~~year~~Permian ~~ended~~Basin ~~December~~from 31Sabinal Energy Operating, LLC, ~~2025.~~Sabinal ~~The~~Resources, ~~press~~LLC ~~release is~~and ~~furnished~~Sabinal asCBP, ~~Exhibit~~LLC 99and (ii) 100% of the membership interests in SIMCOE LLC and Simlog LLC from VEPU Inc.1 and toSimlog Inc. The Company is filing this Current Report on Form 8-K to provide certain unaudited pro forma financial information regarding the acquisitions in connection with the Registration Statement on Form S-3 filed by the Company with the U.S. Securities and Exchange Commission (the “Commission”) on October 30, 2025 and declared effective by the Commission on December 12, 2025.

~~The information under this~~ Item 29.~~02 and in Exhibit 99~~01.1 toFinancial ~~this~~Statements ~~Report is being furnished~~ and ~~shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section~~Exhibits. The information under this Item 2.02 and in Exhibit 99.1 to this Report shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended (the “Securities Act”).

~~Item~~(b) ~~9.01~~Pro ~~Financial~~forma ~~Statements~~financial ~~and Exhibits~~information.

~~(d)~~The ~~Exhibits~~unaudited pro forma condensed combined statements of operations for the year ended December 31, 2025 are filed herewith and attached hereto as Exhibit 99.1, and are incorporated herein by reference.

Exhibit No.		Description
99.1		Press Release issued March 12, 2026.
104		Cover Page Interactive Data File (formatted as Inline XBRL).

(d) Exhibits.

Exhibit No.		Description
99.1		Unaudited Pro Forma Condensed Combined Statement of Operations of Mach Natural Resources LP for the year ended December 31, 2025.
104		Cover Page Interactive Data File (formatted as Inline XBRL).

~~SIGNATURES~~1

~~Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.~~SIGNATURES

	Mach Natural Resources LP
	By:	Mach Natural Resources GP LLC,
		its general partner
Dated: March 12, 2026	By:	/s/ Tom L. Ward
		Name:	Tom L. Ward
		Title:	Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Mach Natural Resources LP

	By:	Mach Natural Resources GP LLC,
		its general partner

Dated: April 6, 2026	By:	/s/ Tom L. Ward
		Name:	Tom L. Ward
		Title:	Chief Executive Officer

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