Kayne Anderson holds 9.23% of Mach Natural Resources (NYSE: MNR)

Rhea-AI Filing Summary

Kayne Anderson Capital Advisors, L.P. amended a Schedule 13G/A to report beneficial ownership of 15,517,713 common units of Mach Natural Resources LP. The filing shows 9.23% of the class and states Kayne Anderson has sole voting and sole dispositive power over those units. The amendment is signed by Michael O'Neil on 04/08/2026.

Key Figures

Beneficial ownership: 15,517,713 shares Percent of class: 9.23% Filing date: 04/08/2026 +3 more

6 metrics

Beneficial ownership 15,517,713 shares common units reported in Schedule 13G/A

Percent of class 9.23% percent of outstanding common units

Filing date 04/08/2026 signature date on amendment

Sole voting power 15,517,713 shares number with sole voting authority

Sole dispositive power 15,517,713 shares number with sole dispositive authority

CUSIP 55445L100 identifier for common units

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 Mach Natural Resources LP COMMON UNITS"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: Kayne Anderson Capital Advisors, L.P. Managed Accounts 15,517,713"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power financial

"Sole Dispositive Power 15,517,713.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Mach Natural Resources LP

(Name of Issuer)

COMMON UNITS

(Title of Class of Securities)

55445L100

(CUSIP Number)

04/08/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 55445L100

1

Names of Reporting Persons

KAYNE ANDERSON CAPITAL ADVISORS, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 15,517,713.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 15,517,713.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

15,517,713.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.23 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Mach Natural Resources LP
(b)	Address of issuer's principal executive offices: 14201 Wireless Way, Suite 300, Oklahoma City, Oklahoma, 73134
Item 2.
(a)	Name of person filing: Kayne Anderson Capital Advisors, L.P.
(b)	Address or principal business office or, if none, residence: 2121 Avenue of the Stars, Ninth Floor Los Angeles, CA 90067
(c)	Citizenship: Kayne Anderson Capital Advisors, L.P. is a Delaware limited partnership
(d)	Title of class of securities: COMMON UNITS
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Kayne Anderson Capital Advisors, L.P. Managed Accounts 15,517,713
(b)	Percent of class: 9.23%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 15,517,713
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 15,517,713
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

KAYNE ANDERSON CAPITAL ADVISORS, L.P.

Signature:	/S/ MICHAEL O'NEIL
Name/Title:	Michael O'Neil, Chief Compliance Officer
Date:	04/08/2026

Exhibit Information

Exhibit 99.1

FAQ

What stake does Kayne Anderson report in Mach Natural Resources (MNR)?

Kayne Anderson reports beneficial ownership of 15,517,713 common units, representing 9.23% of the class. The filing identifies these units as managed accounts held by Kayne Anderson Capital Advisors, L.P.

What voting and disposition powers does Kayne Anderson state for MNR units?

The filing states Kayne Anderson has sole voting power and sole dispositive power over 15,517,713 units. The schedule lists zero shared voting or dispositive power for these holdings.

When was the Schedule 13G/A amendment filed for MNR?

The Schedule 13G/A amendment is dated and signed on 04/08/2026. Michael O'Neil, Chief Compliance Officer, signed the filing as indicated in the exhibit information.

Who is the filing entity for the MNR Schedule 13G/A?

The filing entity is Kayne Anderson Capital Advisors, L.P., a Delaware limited partnership. The address listed is 2121 Avenue of the Stars, Ninth Floor, Los Angeles, CA 90067.