KAYNE ANDERSON CAPITAL ADVISORS LP - 08 Apr 2026 Form 4 Insider Report for MACH NATURAL RESOURCES LP (MNR)

Reporting relationship: Former 10% Owner
Issuer ticker: MNR
Reported as of: 08 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 08 Apr 2026, 18:38:03 UTC
Prior SEC filing: 08 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Michael O'Neil

Key filing fact

KAYNE ANDERSON CAPITAL ADVISORS LP filed Form 4 for MACH NATURAL RESOURCES LP (MNR) on 08 Apr 2026.

Key facts

This page summarizes KAYNE ANDERSON CAPITAL ADVISORS LP's Form 4 filing for MACH NATURAL RESOURCES LP (MNR).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 08 Apr 2026, 18:38.

Change

Previous filing in this sequence was filed on 08 Apr 2026.
Current net transaction value: $0.

Research use

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.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0000949615 Primary reporting owner

KAYNE ANDERSON CAPITAL ADVISORS LP

Relationship: Former 10% Owner
Address: 2121 AVENUE OF THE STARS, 9TH FLOOR, LOS ANGELES
Signature: /s/ Michael O'Neil
Signature date: 08 Apr 2026

CIK 0002083178

Sabinal Energy Operating, LLC

Relationship: Former 10% Owner
Address: 717 TEXAS AVENUE, SUITE 2200, HOUSTON
Signature: /s/ Oren Marouni
Signature date: 08 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MNR transaction

Common Units

Other

Transaction value
Shares: -3,442,321
Change %: -18%
Price: $12.81^*
Shares after: 15,517,713
Date: 08 Apr 2026
Ownership: Sabinal Energy Operating, LLC
Footnotes: F1, F2

MNR transaction

Common Units

Other

Transaction value
Shares: -3,442,321
Change %: -18%
Price: $12.81^*
Shares after: 15,517,713
Date: 08 Apr 2026
Ownership: Sabinal Energy Operating, LLC
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

KAYNE ANDERSON CAPITAL ADVISORS LP is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 2 footnotes

Footnote F1

On April 6, 2026, Mach Natural Resources LP (the "Company") entered into an underwriting agreement (the "Underwriting Agreement"), by and among the Company, Mach Natural Resources GP LLC, the general partner of the Company, the selling unitholders party thereto (the "Selling Unitholders", of which Sabinal Energy Operating, LLC is one) and Morgan Stanley & Co. LLC (the "Underwriter"), pursuant to which the Selling Unitholders agreed to sell to the Underwriter, and the Underwriter agreed to purchase from the Selling Unitholders, an aggregate of 9,000,000 common units representing limited partner interests ("Common Units") in the Company (such offering, the "Offering").

Footnote F2

The reported units are held by Sabinal Energy Operating, LLC, a portfolio company of a private investment fund managed by Kayne Anderson Capital Advisors, L.P.