person · Reporting owner

McMullen William Wallace

Disclosed activity across 2 companies

Tapewire entity: 56579
SEC CIK: 0001730172

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
Alta Mesa Resources, Inc. /DEAMR · Entity 154261	Director · 10% owner	September 05, 2018	September 07, 2018
MACH NATURAL RESOURCES LPMNR · Entity 4469	Director · 10% owner · See Remarks	September 15, 2026	September 17, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Alta Mesa Resources, Inc. /DE

Report date September 05, 2018 · Filed September 07, 2018

Jointly reported with BAYOU CITY ENERGY MANAGEMENT LLC

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Class A Common StockSEC Table I · non-derivative	IndirectThrough BCE-AMR Holdings LLC	4,133,911	Last balance in matching sequence After 2018-09-07 transaction · row 3 Source-order balances reconcile. Account continuity and personal attribution are not independently verified. 3 source rows Row 1 · 2018-09-05 · Purchase · Acquired 74,000 · Balance 3,896,800 F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.77 to $4.81, inclusive. F4: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Row 2 · 2018-09-06 · Purchase · Acquired 211,000 · Balance 4,107,800 F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.67 to $4.74, inclusive. F4: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Row 3 · 2018-09-07 · Purchase · Acquired 26,111 · Balance 4,133,911 F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.63 to $4.65, inclusive. F4: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein.
Class C Common StockSEC Table II · derivative / convertible security	IndirectPlease see footnotes	81,305,340	Reported balance Holding disclosure · report date 2018-09-05 · row 4 Instrument identity requires review; Table II rows are not merged. 1 source row Row 4 · Balance 81,305,340 F1: Common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of Alta Mesa Resources, Inc. (the "Company"), are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and have no expiration date. F2: BCE-AMH Holdings, LLC, a Delaware limited liability company, holds 13,717,224 shares of Class C Common Stock on account of its proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa Holdings, LP. F3: BCE-MESA Holdings, LLC, a Delaware limited liability company, holds 67,588,116 shares of Class C Common Stock on account of its proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa, LP. F4: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein.

Filing footnotes · ownership attribution and instrument terms

F1: Common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of Alta Mesa Resources, Inc. (the "Company"), are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and have no expiration date.

F2: BCE-AMH Holdings, LLC, a Delaware limited liability company, holds 13,717,224 shares of Class C Common Stock on account of its proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa Holdings, LP.

F3: BCE-MESA Holdings, LLC, a Delaware limited liability company, holds 67,588,116 shares of Class C Common Stock on account of its proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa, LP.

F4: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein.

F5: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.77 to $4.81, inclusive.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.67 to $4.74, inclusive.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.63 to $4.65, inclusive.

MACH NATURAL RESOURCES LP

Report date September 15, 2026 · Filed September 17, 2026

Jointly reported with BAYOU CITY ENERGY MANAGEMENT LLC

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common UnitsSEC Table I · non-derivative	Direct	22,124	Reported balance After 2026-09-15 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 1 · 2026-09-15 · Purchase · Acquired 22,124 · Balance 22,124
Common UnitsSEC Table I · non-derivative	IndirectSee footnote	74,872,307	Reported balance After 2026-09-15 transaction · row 2 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 2 · 2026-09-15 · Purchase · Acquired 12,390 · Balance 74,872,307 F1: 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: 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.

Filing footnotes · ownership attribution and instrument terms

F1: 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: 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.

Transaction history

JSON API

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
September 15, 2026 Filed Sep 17, 2026 21:11 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	12,390	$11.30	$140,007.00	Disclosure 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. Read SEC document
September 15, 2026 Filed Sep 17, 2026 21:11 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	22,124	$11.25	$248,895.00	Disclosure 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 Read SEC document
March 23, 2026 Filed Mar 23, 2026 16:05 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	3,215	$13.63	$43,820.45	Disclosure 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. Read SEC document
March 20, 2026 Filed Mar 23, 2026 16:05 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	2,500	$14.00	$35,000.00	Disclosure 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. Read SEC document
March 19, 2026 Filed Mar 23, 2026 16:05 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	3,570	$14.00	$49,980.00	Disclosure 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. Read SEC document
December 09, 2025 Filed Dec 10, 2025 16:05 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	17,500	$12.32	$215,600.00	Disclosure 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. Read SEC document
December 08, 2025 Filed Dec 10, 2025 16:05 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	12,500	$12.53	$156,625.00	Disclosure 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. Read SEC document
November 14, 2025 Filed Nov 18, 2025 16:05 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	4,608	$11.85	$54,604.80	Disclosure 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. Read SEC document
August 11, 2025 Filed Aug 12, 2025 08:00 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	3,085	$14.39	$44,393.15	Disclosure 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. Read SEC document
June 16, 2025 Filed Jun 17, 2025 17:03 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	144,900	$14.96	$2,167,704.00	Disclosure 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. Read SEC document
June 13, 2025 Filed Jun 17, 2025 17:03 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	135,500	$14.72	$1,994,560.00	Disclosure 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. Read SEC document
June 12, 2025 Filed Jun 12, 2025 17:25 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	93,500	$14.29	$1,336,115.00	Disclosure 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. Read SEC document
June 11, 2025 Filed Jun 12, 2025 17:25 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	72,411	$14.01	$1,014,478.11	Disclosure 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. Read SEC document
June 10, 2025 Filed Jun 12, 2025 17:25 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	79,218	$13.58	$1,075,780.44	Disclosure 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. Read SEC document
February 07, 2025 Filed Feb 10, 2025 18:07 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	5,161,290	$15.50	$79,999,995.00	Disclosure 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. Read SEC document
December 17, 2024 Filed Dec 17, 2024 18:47 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	313,978	$15.62	$4,904,336.36	Disclosure 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. Read SEC document
December 16, 2024 Filed Dec 17, 2024 18:47 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	150,000	$15.33	$2,299,500.00	Disclosure 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. Read SEC document
December 13, 2024 Filed Dec 17, 2024 18:47 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	98,751	$15.28	$1,508,915.28	Disclosure 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. Read SEC document
December 12, 2024 Filed Dec 12, 2024 19:44 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	146,758	$15.01	$2,202,837.58	Disclosure 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. Read SEC document
December 11, 2024 Filed Dec 12, 2024 19:44 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	125,000	$14.99	$1,873,750.00	Disclosure 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. Read SEC document
December 10, 2024 Filed Dec 12, 2024 19:44 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	PurchaseCommon Units	65,000	$14.83	$963,950.00	Disclosure 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. Read SEC document
October 27, 2023 Filed Oct 31, 2023 16:30 UTC	MACH NATURAL RESOURCES LP MNR · Entity 4469	Disposition to issuerCommon Units	3,009,999	$17.67	$53,186,682.33	Disclosure SEC source: 0001213900-23-081831 · 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: 68,226,633 F1 · kind: On October 27, 2023, the Issuer used a portion of the net proceeds from the closing of its initial public offering ("IPO") of common units to purchase common units from certain of the Issuer's pre-IPO unitholders, including the Reporting Person, at a price of $17.67 per unit (such price per unit being the price that the Issuer received from the underwriters in the IPO, net of the underwriting discounts and commissions). 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. Read SEC document
September 07, 2018 Filed Sep 7, 2018 19:55 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	26,111	$4.65	$121,416.15	Disclosure SEC source: 0000899243-18-024042 · doc4.xml · nonDerivative · entry 3 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 4,133,911 F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.63 to $4.65, inclusive. F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
September 06, 2018 Filed Sep 7, 2018 19:55 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	211,000	$4.72	$995,920.00	Disclosure SEC source: 0000899243-18-024042 · doc4.xml · nonDerivative · entry 2 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 4,107,800 F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.67 to $4.74, inclusive. F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
September 05, 2018 Filed Sep 7, 2018 19:55 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	74,000	$4.80	$355,200.00	Disclosure SEC source: 0000899243-18-024042 · doc4.xml · nonDerivative · entry 1 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 3,896,800 F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.77 to $4.81, inclusive. F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
August 30, 2018 Filed Aug 31, 2018 16:10 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	244,000	$4.89	$1,193,160.00	Disclosure SEC source: 0000899243-18-023641 · doc4.xml · nonDerivative · entry 2 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 3,822,800 F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.86 to $4.90, inclusive. F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
August 29, 2018 Filed Aug 31, 2018 16:10 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	178,000	$4.90	$872,200.00	Disclosure SEC source: 0000899243-18-023641 · doc4.xml · nonDerivative · entry 1 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 3,578,800 F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.86 to $4.90, inclusive. F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
August 21, 2018 Filed Aug 21, 2018 21:08 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	1,069,000	$4.41	$4,714,290.00	Disclosure SEC source: 0000899243-18-022936 · doc4.xml · nonDerivative · entry 3 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 3,400,800 F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
August 20, 2018 Filed Aug 21, 2018 21:08 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	950,000	$4.25	$4,037,500.00	Disclosure SEC source: 0000899243-18-022936 · doc4.xml · nonDerivative · entry 2 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 2,331,800 F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
August 17, 2018 Filed Aug 21, 2018 21:08 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	PurchaseClass A Common Stock	1,381,800	$4.34	$5,997,012.00	Disclosure SEC source: 0000899243-18-022936 · doc4.xml · nonDerivative · entry 1 BAYOU CITY ENERGY MANAGEMENT LLC · CIK 0001742941 · Director · 10% owner McMullen William Wallace · CIK 0001730172 · Director · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · Through BCE-AMR Holdings LLC Disclosed balance after: 1,381,800 F4 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders"), and BCE-AMR Holdings LLC ("BCE-AMR"), are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). William W. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders and BCE-AMR) 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 Class C Common Stock which the BCE Holders beneficially own and the Class A Common Stock which BCE-AMR owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. F5 · ownership.nature: (Continued from footnote 4) Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class A Common Stock and the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class A Common Stock and Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document
February 09, 2018 Filed Jun 12, 2018 08:54 UTC	Alta Mesa Resources, Inc. /DE AMR · Entity 154261	OtherClass C Common Stock · Derivative	81,305,340	Not disclosed	Not disclosed	Disclosure SEC source: 0000899243-18-016134 · doc4.xml · derivative · entry 1 McMullen William Wallace · CIK 0001730172 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · Please see footnotes Disclosed balance after: 81,305,340 Underlying: Class A Common Stock · 81,305,340 shares Expires not disclosed F1 · security: Common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of Alta Mesa Resources, Inc. (the "Company"), are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and have no expiration date. F1 · derivative.exercise_price: Common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of Alta Mesa Resources, Inc. (the "Company"), are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and have no expiration date. F2 · kind: The securities were acquired in a business combination pursuant to which the Company acquired all of the equity interests in Alta Mesa Holdings, LP and Kingfisher Midstream, LLC (the "Business Combination"). F3 · price: In the Business Combination, the common units of SRII Opco, LP and shares of Class C Common Stock of the Company, considered as a unit, had an implied value of $10.00 per unit. F1 · derivative.expiration_date: Common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of Alta Mesa Resources, Inc. (the "Company"), are convertible, as a unit, into an equal number of shares of Class A Common Stock of the Company and have no expiration date. F4 · ownership.nature: BCE-AMH Holdings, LLC, a Delaware limited liability company, holds 13,717,224 shares of Class C Common Stock on account of its proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa Holdings, LP. F5 · ownership.nature: BCE-MESA Holdings, LLC, a Delaware limited liability company, holds 67,588,116 shares of Class C Common Stock on account of its proportionate share of (a) 142,268,993 common units of SRII Opco, LP and an equal number of shares of Class C Common Stock of the Company and (b) 51,194,824 Earn-Out Shares, in each case, beneficially owned by High Mesa, LP. F6 · ownership.nature: Each of BCE-AMH Holdings, LLC and BCE-MESA Holdings, LLC (collectively, the "BCE Holders") are managed, directly or indirectly, by Bayou City Energy Management LLC ("BCEM"). The Mr. McMullen is the Managing Partner of BCEM. Each of BCEM (by virtue of its relationship with the BCE Holders) 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 Class C Common Stock which the BCE Holders beneficially own. Mr. McMullen disclaims beneficial ownership of such Class C Common Stock except to the extent of his pecuniary interest therein. Mr. McMullen (by virtue of his relationship to BCEM) may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Class C Common Stock which BCEM beneficially owns. Mr. McMullen disclaims beneficial ownership of such Class C Common Stock except to the extent of his pecuniary interest therein. Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.