STOCK TITAN

[Form 4] MACH NATURAL RESOURCES LP Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Mach Natural Resources LP reported a restructuring-type insider transaction involving its Common Units. On the reported date, 3,442,321 Common Units were recorded in an "other" transaction, categorized as an indirect holding through Sabinal Energy Operating, LLC.

After this transaction, the filing shows 15,517,713 Common Units indirectly held. A footnote explains that Sabinal Energy Operating, LLC is a portfolio company of a private investment fund managed by Kayne Anderson Capital Advisors, L.P. Another footnote notes an underwriting agreement under which selling unitholders, including Sabinal Energy Operating, LLC, agreed to sell an aggregate of 9,000,000 Common Units to an underwriter.

Positive

  • None.

Negative

  • None.
Insider KAYNE ANDERSON CAPITAL ADVISORS LP, Sabinal Energy Operating, LLC
Role Insider | Insider
Type Security Shares Price Value
Other Common Units 3,442,321 $12.81 $44.10M
Holdings After Transaction: Common Units — 15,517,713 shares (Indirect, Sabinal Energy Operating, LLC)
Footnotes (1)
  1. 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"). 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.
Restructured units 3,442,321 Common Units Other transaction reported on the Form 4
Implied transaction price $12.8100 per unit Price per Common Unit for the 3,442,321 units
Units held after transaction 15,517,713 Common Units Indirect holdings following the transaction
Aggregate offering size 9,000,000 Common Units Units to be sold by selling unitholders under underwriting agreement
underwriting agreement financial
"entered into an underwriting agreement (the "Underwriting Agreement"), by and among the Company..."
An underwriting agreement is a contract where a company selling new stocks or bonds hires financial firms to buy those securities and resell them to investors. It matters because the agreement sets the offering price, number of securities, fees and which party bears the risk if sales fall short—think of it as a promise that the sale will happen and a roadmap investors can use to understand how the new securities reach the market.
Selling Unitholders financial
"the selling unitholders party thereto (the "Selling Unitholders", of which Sabinal Energy Operating, LLC is one)"
Owners who hold units in a fund, trust or similar pooled investment and are offering those units for sale in a public or private transaction. For investors, the presence of selling unitholders matters because it can increase the number of units for sale, putting downward pressure on price and revealing that current holders are cashing out—similar to several homeowners listing units in the same building, which can affect market value and buyer perception.
Common Units financial
"an aggregate of 9,000,000 common units representing limited partner interests ("Common Units") in the Company"
Common units are the basic ownership stakes in a company, limited partnership, or trust that function like common stock: they give holders a claim on profits and often voting rights. Think of them as the ordinary seats at a table—the most directly affected by the business’s success or failure, so they typically offer higher upside but carry greater risk than preferred claims or creditors, which matters to investors evaluating potential return and safety.
private investment fund financial
"a portfolio company of a private investment fund managed by Kayne Anderson Capital Advisors, L.P."
A private investment fund is a pooled pool of capital from a limited group of investors that professional managers use to buy assets such as companies, real estate, or bonds that are not traded on public markets. Think of it as a private investment club: members give money to a manager who makes decisions on their behalf. It matters to investors because these funds can offer higher returns or different risks than public markets, but they also come with less liquidity, fewer disclosure rules, and longer commitments.
SEC Form 4
FORM 4UNITED 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
Estimated average burden
hours per response:0.5
X
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*
KAYNE ANDERSON CAPITAL ADVISORS LP

(Last)(First)(Middle)
2121 AVENUE OF THE STARS
9TH FLOOR

(Street)
LOS ANGELES CALIFORNIA 90067

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
MACH NATURAL RESOURCES LP [ MNR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
Officer (give title below)XOther (specify below)
Former 10% Owner
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/08/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common Units04/08/2026J(1)3,442,321D$12.8115,517,713I(2)Sabinal Energy Operating, LLC
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
1. Name and Address of Reporting Person*
KAYNE ANDERSON CAPITAL ADVISORS LP

(Last)(First)(Middle)
2121 AVENUE OF THE STARS
9TH FLOOR

(Street)
LOS ANGELES CALIFORNIA 90067

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
Director10% Owner
Officer (give title below)XOther (specify below)
Former 10% Owner
1. Name and Address of Reporting Person*
Sabinal Energy Operating, LLC

(Last)(First)(Middle)
717 TEXAS AVENUE, SUITE 2200

(Street)
HOUSTON TEXAS 77002

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
Director10% Owner
Officer (give title below)XOther (specify below)
Former 10% Owner
Explanation of Responses:
1. 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").
2. 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.
/s/ Michael O'Neil04/08/2026
/s/ Oren Marouni04/08/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)