MNR

SEC source: 0001213900-26-101024 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,872,307

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by Bayou City Energy Management LLC ("BCEM") in multiple transactions at prices ranging from $11.28 to $11.30, inclusive. The Reporting Persons undertake 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 (1) to this Form 4.

F1 · ownership.nature: The price reported in Column 4 is a weighted average price. These common units were purchased by Bayou City Energy Management LLC ("BCEM") in multiple transactions at prices ranging from $11.28 to $11.30, inclusive. The Reporting Persons undertake 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 (1) to this Form 4.

F2 · ownership.nature: The reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 36,368 by BCEM. BCE Aggregator is indirectly managed by BCEM. William W. McMullen is the Managing Partner of BCEM. Accordingly, William W. McMullen may be deemed to beneficially own the securities directly held by BCE Aggregator and BCEM, as applicable, but disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-26-101024 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,124

SEC source: 0001213900-26-100673 · ownership.xml · nonDerivative · entry 1

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Tom L. Ward 1992 Revocable Living Trust

Disclosed balance after: 13,467,452

F1 · price: The Tom L. Ward 1992 Revocable Living Trust (the "Trust") purchased 172,413 common units in an unregistered block trade at a price of $11.60 per unit.

F2 · ownership.nature: The Reporting Person is the Trustee of the Trust. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by the Trust, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly, or indirectly.

SEC source: 0001104659-26-064036 · tm2615155-1_4seq1.xml · nonDerivative · entry 1

IKAV General Partner S.a r.l. · CIK 0002028161 · 10% owner

VEPU Inc. · CIK 0002088389 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 19,371,999

F1 · kind: On May 6, 2026, SIMLOG INC., VEPU Inc. and Mach Natural Resources LP (the "Issuer") entered into a settlement agreement and third amendment to membership interest purchase agreement, pursuant to which, among other things, 1,422,476 common units held by VEPU Inc. were retired and cancelled to reflect the final adjusted purchase price under that certain Membership Interest Purchase Agreement, dated as of July 9, 2025, by and among SIMLOG INC., VEPU Inc. and the Issuer.

F2 · ownership.nature: These common units are held directly by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Constantin von Wasserschleben. This statement is jointly filed by and on behalf each of the foregoing entities and Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc.

F4 · ownership.nature: The reporting persons each disclaim beneficial ownership of the securities covered by this statement, except to the extent of the pecuniary interest of such reporting person in such securities. Each reporting person states that neither the filing of this statement nor anything herein shall be deemed an admission that such reporting person is, for purposes of Section 16 of the Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise, the beneficial owner of any securities covered by this statement.

F5 · ownership.nature: The reporting persons may be deemed to be a member of a group with respect to the Issuer or securities of the Issuer for purposes of Section 13(d) or 13(g) of the Exchange Act. The reporting persons declare that neither the filing of this statement nor anything herein shall be construed as an admission that such persons are, for the purposes of Section 13(d) or 13(g) of the Exchange Act or any other purpose, a member of a group with respect to the Issuer or securities of the Issuer.

SEC source: 0001213900-26-043053 · ownership.xml · nonDerivative · entry 4

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by WCT Resources LLC

Disclosed balance after: 76,628

F1 · price: As previously disclosed in the Issuer's prospectus supplement dated April 6, 2026, filed with the U.S. Securities and Exchange Commission on April 8, 2026, certain selling unitholders completed a public underwritten offering of the Issuer's common units. The Tom L. Ward 1992 Revocable Living Trust (the "Trust") and WCT Resources LLC ("WCT Resources") each purchased 76,628 common units at a price to the public of $13.05 per unit.

F5 · ownership.nature: The Reporting Person exercises control over WCT Resources which is owned by certain trusts affiliated with Mr. Ward. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by WCT Resources, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-26-043053 · ownership.xml · nonDerivative · entry 1

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Tom L. Ward 1992 Revocable Living Trust

Disclosed balance after: 13,295,039

F1 · price: As previously disclosed in the Issuer's prospectus supplement dated April 6, 2026, filed with the U.S. Securities and Exchange Commission on April 8, 2026, certain selling unitholders completed a public underwritten offering of the Issuer's common units. The Tom L. Ward 1992 Revocable Living Trust (the "Trust") and WCT Resources LLC ("WCT Resources") each purchased 76,628 common units at a price to the public of $13.05 per unit.

F2 · ownership.nature: The Reporting Person is the Trustee of the Trust. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by the Trust, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly, or indirectly.

SEC source: 0001638397-26-000003 · primary_doc.xml · nonDerivative · entry 1

KAYNE ANDERSON CAPITAL ADVISORS LP · CIK 0000949615 · Former 10% Owner

Sabinal Energy Operating, LLC · CIK 0002083178 · Former 10% Owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Sabinal Energy Operating, LLC

Disclosed balance after: 15,517,713

F1 · kind: 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").

F2 · ownership.direct: 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.

SEC source: 0001104659-26-042127 · tm2611574-1_4seq1.xml · nonDerivative · entry 2

IKAV General Partner S.a r.l. · CIK 0002028161 · 10% owner

VEPU Inc. · CIK 0002088389 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 4,259,110

F2 · ownership.nature: These common units are held directly by SIMLOG Inc., which is wholly owned by Simlog S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Mr. von Wasserschleben. This statement is jointly filed by and on behalf each of the foregoing entities and Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by SIMLOG Inc.

F3 · ownership.nature: The reporting persons each disclaim beneficial ownership of the securities covered by this statement, except to the extent of the pecuniary interest of such reporting person in such securities. Each reporting person states that neither the filing of this statement nor anything herein shall be deemed an admission that such reporting person is, for purposes of Section 16 of the Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise, the beneficial owner of any securities covered by this statement.

F4 · ownership.nature: The reporting persons may be deemed to be a member of a group with respect to Mach Natural Resources LP (the "Issuer") or securities of the Issuer for purposes of Section 13(d) or 13(g) of the Exchange Act. The reporting persons declare that neither the filing of this statement nor anything herein shall be construed as an admission that such persons are, for the purposes of Section 13(d) or 13(g) of the Exchange Act or any other purpose, a member of a group with respect to the Issuer or securities of the Issuer.

SEC source: 0001104659-26-042127 · tm2611574-1_4seq1.xml · nonDerivative · entry 1

IKAV General Partner S.a r.l. · CIK 0002028161 · 10% owner

VEPU Inc. · CIK 0002088389 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 20,794,475

F1 · ownership.nature: These common units are held directly by VEPU Inc., which is wholly owned by IDI Investment S.a r.l., which is controlled by IKAV SICAV FIS SCA, whose general partner is IKAV General Partner S.a r.l., which is wholly owned by Institut fur Kapitalanlagen und Vesicherungslosungen GmbH, whose majority owner is Constantin von Wasserschleben. This statement is jointly filed by and on behalf each of the foregoing entities and Mr. von Wasserschleben. As such, each of the foregoing entities and Mr. von Wasserschleben may be deemed to share beneficial ownership of the securities held of record by VEPU Inc.

F3 · ownership.nature: The reporting persons each disclaim beneficial ownership of the securities covered by this statement, except to the extent of the pecuniary interest of such reporting person in such securities. Each reporting person states that neither the filing of this statement nor anything herein shall be deemed an admission that such reporting person is, for purposes of Section 16 of the Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise, the beneficial owner of any securities covered by this statement.

F4 · ownership.nature: The reporting persons may be deemed to be a member of a group with respect to Mach Natural Resources LP (the "Issuer") or securities of the Issuer for purposes of Section 13(d) or 13(g) of the Exchange Act. The reporting persons declare that neither the filing of this statement nor anything herein shall be construed as an admission that such persons are, for the purposes of Section 13(d) or 13(g) of the Exchange Act or any other purpose, a member of a group with respect to the Issuer or securities of the Issuer.

SEC source: 0001213900-26-032917 · ownership.xml · nonDerivative · entry 3

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,859,917

F1 · shares: These common units were purchased by Bayou City Energy Management LLC ("BCEM").

F3 · price: 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 $13.535 to $13.65, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (3) to this Form 4.

F4 · balance_after: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.

SEC source: 0001213900-26-032917 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,856,702

F1 · shares: These common units were purchased by Bayou City Energy Management LLC ("BCEM").

F4 · balance_after: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.

SEC source: 0001213900-26-032918 · ownership.xml · nonDerivative · entry 2

Burn Christopher · CIK 0002101878 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,587

SEC source: 0001213900-26-032917 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,854,202

F1 · shares: These common units were purchased by Bayou City Energy Management LLC ("BCEM").

F2 · price: 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 $13.99 to $14.00, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), 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.

F4 · balance_after: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Mach Aggregator LLC ("BCE Aggregator") and 23,978 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.

SEC source: 0001213900-26-032918 · ownership.xml · nonDerivative · entry 1

Burn Christopher · CIK 0002101878 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,587

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by the Reporting Person in multiple transactions at prices ranging from $13.99 to $14.15, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4.

SEC source: 0001213900-26-015042 · ownership.xml · nonDerivative · entry 2

WHITE KEVIN R. · CIK 0001341654 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 455,871

F2 · shares: The Issuer withheld units to satisfy tax withholding obligations associated with the Grant.

SEC source: 0001213900-26-015041 · ownership.xml · nonDerivative · entry 2

Reel Michael E · CIK 0001995408 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,816

F2 · shares: The Issuer withheld units to satisfy tax withholding obligations associated with the Grant.

SEC source: 0001638397-26-000001 · primary_doc.xml · nonDerivative · entry 1

KAYNE ANDERSON CAPITAL ADVISORS LP · CIK 0000949615 · 10% owner

Sabinal Energy Operating, LLC · CIK 0002083178 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Sabinal Energy Operating, LLC

Disclosed balance after: 18,960,034

F1 · kind: As part of the purchase and sale agreement between Mach Natural Resources ("MNR") and Sabinal Energy Operating, LLC ("Sabinal") (the "PSA"), MNR issued Sabinal 19,187,581 Common Units (the "Sabinal Common Units"), as previously disclosed in the Form 3 filed on 9/22/25. In accordance with the final purchase price adjustment mechanics contained in the PSA, Sabinal has agreed to deliver to MNR 227,547 Sabinal Common Units.

F2 · ownership.direct: 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.

SEC source: 0001213900-26-015042 · ownership.xml · nonDerivative · entry 1

WHITE KEVIN R. · CIK 0001341654 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 461,498

F1 · shares: Represents the grant of common units (the "Grant") of the Issuer under the Issuer's 2023 Long-Term Incentive Plan.

SEC source: 0001213900-26-015041 · ownership.xml · nonDerivative · entry 1

Reel Michael E · CIK 0001995408 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,348

F1 · shares: Represents the grant of common units (the "Grant") of the Issuer under the Issuer's 2023 Long-Term Incentive Plan.

SEC source: 0001213900-26-001345 · ownership.xml · nonDerivative · entry 1

Burn Christopher · CIK 0002101878 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,587

F1 · shares: The reported securities represent phantom units. Each phantom unit represents the contingent right to receive one common unit of the Issuer upon vesting. The phantom units will vest on the first anniversary of the grant date, subject in each case to the continued service through such dates.

SEC source: 0001213900-25-120073 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,850,632

F1 · shares: These common units were purchased by BCE-Mach Aggregator LLC ("BCE Aggregator").

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $12.30 to $12.35, 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 (3) to this Form 4.

F4 · balance_after: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Aggregator and 14,693 by Bayou City Energy Management LLC ("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.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Aggregator and 14,693 by Bayou City Energy Management LLC ("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.

SEC source: 0001213900-25-120073 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,833,132

F1 · shares: These common units were purchased by BCE-Mach Aggregator LLC ("BCE Aggregator").

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $12.44 to $12.67, 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.

F4 · balance_after: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Aggregator and 14,693 by Bayou City Energy Management LLC ("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.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,835,939 by BCE Aggregator and 14,693 by Bayou City Energy Management LLC ("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.

SEC source: 0001213900-25-116662 · ownership.xml · nonDerivative · entry 3

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Tom L. Ward Family Foundation

Disclosed balance after: 167,030

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by the Tom L. Ward Family Foundation (the "Foundation") in multiple transactions at prices ranging from $11.56 to $11.72, 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 (3) to this Form 4.

F4 · ownership.nature: The Reporting Person exercises control over the Foundation. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by the Foundation, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly, or indirectly.

SEC source: 0001213900-25-114737 · ownership.xml · nonDerivative · entry 3

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Tom L. Ward Family Foundation

Disclosed balance after: 127,030

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by the Tom L. Ward Family Foundation (the "Foundation") in multiple transactions at prices ranging from $11.43 to $11.46, 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 (3) to this Form 4.

F4 · ownership.nature: The Reporting Person exercises control over the Foundation. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by the Foundation, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly, or indirectly.

SEC source: 0001213900-25-112089 · ownership.xml · nonDerivative · entry 4

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Tom L. Ward Family Foundation

Disclosed balance after: 83,370

F5 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by the Foundation in multiple transactions at prices ranging from $11.91 to $12.03, 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 (5) to this Form 4.

F4 · ownership.nature: The Reporting Person exercises control over the Foundation. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by the Foundation, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly, or indirectly.

SEC source: 0001213900-25-112089 · ownership.xml · nonDerivative · entry 3

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Tom L. Ward Family Foundation

Disclosed balance after: 41,630

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by the Tom L. Ward Family Foundation (the "Foundation") in multiple transactions at prices ranging from $11.85 to $12.09, 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 (3) to this Form 4.

F4 · ownership.nature: The Reporting Person exercises control over the Foundation. By virtue of the relationship, the Reporting Person may be deemed to have or share beneficial ownership of the securities held of record by the Foundation, but the Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly, or indirectly.

SEC source: 0001213900-25-112091 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,820,632

F1 · shares: These common units were purchased by Bayou City Energy Management LLC ("BCEM").

F2 · price: 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.

F3 · balance_after: 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.

F3 · ownership.nature: 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.

SEC source: 0001213900-25-104128 · ownership.xml · nonDerivative · entry 3

WARD TOM L. · CIK 0001038276 · Director · See Remarks · 10% owner · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,728,593

F3 · security: The issuer withheld units to satisfy the tax withholding obligations associated with the vesting of phantom units.

SEC source: 0001213900-25-104133 · ownership.xml · nonDerivative · entry 1

Giesinger Edgar R. JR. · CIK 0001658831 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,111

F1 · shares: The reported securities represent phantom units. Each phantom unit represents the contingent right to receive one common unit of the Issuer upon vesting. The phantom units will vest on the first anniversary of the grant date, subject in each case to the continued service through such dates.

SEC source: 0001213900-25-104126 · ownership.xml · nonDerivative · entry 1

KEATING FRANK A · CIK 0001240029 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,111

F1 · shares: The reported securities represent phantom units. Each phantom unit represents the contingent right to receive one common unit of the Issuer upon vesting. The phantom units will vest on the first anniversary of the grant date, subject in each case to the continued service through such dates.

SEC source: 0001213900-25-104131 · ownership.xml · nonDerivative · entry 1

WHITE KEVIN R. · CIK 0001341654 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 449,612

F1 · security: The issuer withheld units to satisfy the tax withholding obligations associated with the vesting of phantom units.

SEC source: 0001213900-25-104132 · ownership.xml · nonDerivative · entry 1

Perich Stephen C · CIK 0001995420 · Director · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,111

F1 · shares: The reported securities represent phantom units. Each phantom unit represents the contingent right to receive one common unit of the Issuer upon vesting. The phantom units will vest on the first anniversary of the grant date, subject in each case to the continued service through such dates.

SEC source: 0001213900-25-104129 · ownership.xml · nonDerivative · entry 1

Reel Michael E · CIK 0001995408 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,197

F1 · security: The issuer withheld units to satisfy the tax withholding obligations associated with the vesting of phantom units.

SEC source: 0001213900-25-074636 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,816,024

F1 · shares: These common units were purchased by Bayou City Energy Management LLC ("BCEM").

F2 · balance_after: After the reported transactions, the reported common units are directly held 74,805,939 by BCE-Mach Aggregator LLC ("BCE Aggregator") and 10,085 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.

F2 · ownership.nature: After the reported transactions, the reported common units are directly held 74,805,939 by BCE-Mach Aggregator LLC ("BCE Aggregator") and 10,085 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.

SEC source: 0001213900-25-055246 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,812,939

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $14.82 to $15.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, 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.

F3 · ownership.nature: After the reported transactions, the reported common units are directly held 74,805,939 by BCE Aggregator and 7,000 by Bayou City Energy Management LLC ("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.

SEC source: 0001213900-25-055246 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,668,039

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by BCE-Mach Aggregator LLC ("BCE Aggregator") in multiple transactions at prices ranging from $14.52 to $14.75, 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 (the "SEC"), upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4.

F3 · ownership.nature: After the reported transactions, the reported common units are directly held 74,805,939 by BCE Aggregator and 7,000 by Bayou City Energy Management LLC ("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.

SEC source: 0001213900-25-053925 · ownership.xml · nonDerivative · entry 3

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,532,539

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $13.99 to $14.45, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (3) to this Form 4.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,525,539 by BCE Aggregator and 7,000 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.

SEC source: 0001213900-25-053925 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,439,039

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased by BCE Aggregator in multiple transactions at prices ranging from $13.77 to $14.21, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, 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.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,525,539 by BCE Aggregator and 7,000 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.

SEC source: 0001213900-25-053925 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 74,366,628

F1 · price: The price reported in Column 4 is a weighted average price. BCE-Mach Aggregator LLC ("BCE Aggregator") purchased 72,218 common units and Bayou City Energy Management LLC ("BCEM") purchased 7,000 common units. These common units were purchased in multiple transactions at prices ranging from $13.48 to $13.68, 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 (the "SEC"), upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4.

F4 · ownership.nature: After the reported transactions, the reported common units are directly held 74,525,539 by BCE Aggregator and 7,000 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.

SEC source: 0001213900-25-011848 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 74,287,410

F1 · price: As previously disclosed in the Issuer's prospectus supplement dated February 6, 2025, filed with the U.S. Securities and Exchange Commission on February 6, 2025, the Issuer completed a public underwritten offering of common units. BCE-Mach Aggregator LLC purchased 5,161,290 common units at a price to the public of $15.50 per share.

F2 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-25-008858 · ownership.xml · nonDerivative · entry 2

WHITE KEVIN R. · CIK 0001341654 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 459,719.19

SEC source: 0001213900-25-008858 · ownership.xml · nonDerivative · entry 1

WHITE KEVIN R. · CIK 0001341654 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 461,908.19

F1 · shares: The reported securities represent Common Units received in settlement of performance stock units granted May 3, 2024.

SEC source: 0001213900-25-008861 · ownership.xml · nonDerivative · entry 2

Reel Michael E · CIK 0001995408 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,888.69

SEC source: 0001213900-25-008861 · ownership.xml · nonDerivative · entry 1

Reel Michael E · CIK 0001995408 · See Remarks · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 86,937.69

F1 · shares: The reported securities represent Common Units received in settlement of performance stock units granted May 3, 2024.

SEC source: 0001213900-24-109881 · ownership.xml · nonDerivative · entry 3

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 69,126,120

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $15.265 to $15.75, inclusive. The Reporting Person 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 (3) to this Form 4.

F4 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-24-109881 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 68,812,142

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $15.10 to $15.46, inclusive. The Reporting Person 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.

F4 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-24-109881 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 68,662,142

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $14.98 to $15.44, inclusive. The Reporting Person 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 (1) to this Form 4.

F4 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-24-108546 · ownership.xml · nonDerivative · entry 3

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 68,563,391

F3 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $14.61 to $15.25, inclusive. The Reporting Person 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 (3) to this Form 4.

F4 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-24-108546 · ownership.xml · nonDerivative · entry 2

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 68,416,633

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $14.67 to $15.15, inclusive. The Reporting Person 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.

F4 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.

SEC source: 0001213900-24-108546 · ownership.xml · nonDerivative · entry 1

McMullen William Wallace · CIK 0001730172 · Director · 10% owner · See Remarks

BCE-Mach Aggregator LLC · CIK 0001997530 · 10% owner

BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by BCE-Mach Aggregator LLC

Disclosed balance after: 68,291,633

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions at prices ranging from $14.72 to $15.00, inclusive. The Reporting Person 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 (1) to this Form 4.

F4 · ownership.nature: BCE-Mach Aggregator LLC is indirectly managed by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM and Mr. McMullen (by virtue of his relationship with BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the common units which BCE-Mach Aggregator LLC beneficially owns. Mr. McMullen disclaims beneficial ownership of such common units except to the extent of his pecuniary interest therein.