TALO

SEC source: 0000899243-23-005037 · doc4.xml · nonDerivative · entry 1

Sherrill Richard · CIK 0001963990 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,683

F1 · security: This Form 4 reports securities acquired in connection with the transactions contemplated by that certain Agreement and Plan of Merger, dated as of September 21, 2022 (the "Merger Agreement"), by and among Talos Energy Inc. (the "Issuer"), EnVen Energy Corporation ("EnVen") and the other parties thereto, in which Talos acquired EnVen in a transaction through a series of mergers (the "Transaction"). As partial consideration for the acquisition of EnVen, the holders of Class A common stock, par value $0.001 per share, of EnVen ("EnVen Common Stock") immediately prior to the First Effective Time (as defined in the Merger Agreement) were entitled to collectively receive an aggregate of 43,800,000 shares of common stock, par value $0.01 per share of the Issuer ("Talos Common Stock").

F2 · security: (Continued from Footnote 1) On February 13, 2023, the Transaction closed and as of immediately prior the First Effective Time the reporting person held a total of 41,420 shares of EnVen Common Stock, which were converted into the right to receive 47,683 shares of Talos Common Stock in respect of the portion of the Aggregate Stock Consideration (as defined in the Merger Agreement) to which the reporting person was entitled.

F1 · kind: This Form 4 reports securities acquired in connection with the transactions contemplated by that certain Agreement and Plan of Merger, dated as of September 21, 2022 (the "Merger Agreement"), by and among Talos Energy Inc. (the "Issuer"), EnVen Energy Corporation ("EnVen") and the other parties thereto, in which Talos acquired EnVen in a transaction through a series of mergers (the "Transaction"). As partial consideration for the acquisition of EnVen, the holders of Class A common stock, par value $0.001 per share, of EnVen ("EnVen Common Stock") immediately prior to the First Effective Time (as defined in the Merger Agreement) were entitled to collectively receive an aggregate of 43,800,000 shares of common stock, par value $0.01 per share of the Issuer ("Talos Common Stock").

F2 · kind: (Continued from Footnote 1) On February 13, 2023, the Transaction closed and as of immediately prior the First Effective Time the reporting person held a total of 41,420 shares of EnVen Common Stock, which were converted into the right to receive 47,683 shares of Talos Common Stock in respect of the portion of the Aggregate Stock Consideration (as defined in the Merger Agreement) to which the reporting person was entitled.

F1 · price: This Form 4 reports securities acquired in connection with the transactions contemplated by that certain Agreement and Plan of Merger, dated as of September 21, 2022 (the "Merger Agreement"), by and among Talos Energy Inc. (the "Issuer"), EnVen Energy Corporation ("EnVen") and the other parties thereto, in which Talos acquired EnVen in a transaction through a series of mergers (the "Transaction"). As partial consideration for the acquisition of EnVen, the holders of Class A common stock, par value $0.001 per share, of EnVen ("EnVen Common Stock") immediately prior to the First Effective Time (as defined in the Merger Agreement) were entitled to collectively receive an aggregate of 43,800,000 shares of common stock, par value $0.01 per share of the Issuer ("Talos Common Stock").

F2 · price: (Continued from Footnote 1) On February 13, 2023, the Transaction closed and as of immediately prior the First Effective Time the reporting person held a total of 41,420 shares of EnVen Common Stock, which were converted into the right to receive 47,683 shares of Talos Common Stock in respect of the portion of the Aggregate Stock Consideration (as defined in the Merger Agreement) to which the reporting person was entitled.

SEC source: 0001104659-22-073062 · tm2217400-14_4seq1.xml · nonDerivative · entry 2

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,291,914

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.005 to $20.36. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,342,678 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 767,416 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,752,555 shares held of record by ILX Holdings II, LLC ("ILX II"), and 429,265 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-073060 · tm2217400-13_4seq1.xml · nonDerivative · entry 2

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,291,914

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.005 to $20.36. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,342,678 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 767,416 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,752,555 shares held of record by ILX Holdings II, LLC ("ILX II"), and 429,265 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-073062 · tm2217400-14_4seq1.xml · nonDerivative · entry 1

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,302,444

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.76. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,342,678 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 767,416 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,752,555 shares held of record by ILX Holdings II, LLC ("ILX II"), and 429,265 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-073060 · tm2217400-13_4seq1.xml · nonDerivative · entry 1

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,302,444

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.76. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,342,678 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 767,416 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,752,555 shares held of record by ILX Holdings II, LLC ("ILX II"), and 429,265 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071938 · tm2217400-12_4seq1.xml · nonDerivative · entry 6

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,475,187

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.08. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071938 · tm2217400-12_4seq1.xml · nonDerivative · entry 5

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,482,819

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071938 · tm2217400-12_4seq1.xml · nonDerivative · entry 4

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,590,068

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.80 to $20.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071935 · tm2217400-11_4seq1.xml · nonDerivative · entry 6

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,475,187

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.08. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071935 · tm2217400-11_4seq1.xml · nonDerivative · entry 5

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,482,819

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071935 · tm2217400-11_4seq1.xml · nonDerivative · entry 4

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,590,068

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.80 to $20.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071938 · tm2217400-12_4seq1.xml · nonDerivative · entry 3

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,593,168

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071938 · tm2217400-12_4seq1.xml · nonDerivative · entry 2

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,593,468

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071938 · tm2217400-12_4seq1.xml · nonDerivative · entry 1

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,691,900

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.14 to $21.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071935 · tm2217400-11_4seq1.xml · nonDerivative · entry 3

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,593,168

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071935 · tm2217400-11_4seq1.xml · nonDerivative · entry 2

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,593,468

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071935 · tm2217400-11_4seq1.xml · nonDerivative · entry 1

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,691,900

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.14 to $21.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,467,068 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 778,858 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,793,595 shares held of record by ILX Holdings II, LLC ("ILX II"), and 435,666 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071030 · tm2217400-8_4seq1.xml · nonDerivative · entry 5

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,781,417

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.015. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071030 · tm2217400-8_4seq1.xml · nonDerivative · entry 4

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,781,597

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.98. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071030 · tm2217400-8_4seq1.xml · nonDerivative · entry 3

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,848,970

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.38 to $21.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071027 · tm2217400-7_4seq1.xml · nonDerivative · entry 5

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,781,417

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.015. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071027 · tm2217400-7_4seq1.xml · nonDerivative · entry 4

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,781,597

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.98. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071027 · tm2217400-7_4seq1.xml · nonDerivative · entry 3

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,848,970

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.38 to $21.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071030 · tm2217400-8_4seq1.xml · nonDerivative · entry 2

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,908,470

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.00 to $24.50. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071030 · tm2217400-8_4seq1.xml · nonDerivative · entry 1

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,925,699

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.05 to $23.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071027 · tm2217400-7_4seq1.xml · nonDerivative · entry 2

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,908,470

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.00 to $24.50. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-071027 · tm2217400-7_4seq1.xml · nonDerivative · entry 1

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 12,925,699

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.05 to $23.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,674,910 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 797,977 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,862,170 shares held of record by ILX Holdings II, LLC ("ILX II"), and 446,360 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070163 · tm2216164-4_4seq1.xml · nonDerivative · entry 4

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,008,908

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.00 to $24.65. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070163 · tm2216164-4_4seq1.xml · nonDerivative · entry 3

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,094,136

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.46 to $23.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070155 · tm2216164-3_4seq1.xml · nonDerivative · entry 4

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,008,908

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.00 to $24.65. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070155 · tm2216164-3_4seq1.xml · nonDerivative · entry 3

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,094,136

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.46 to $23.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070163 · tm2216164-4_4seq1.xml · nonDerivative · entry 2

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,125,973

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.49. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070163 · tm2216164-4_4seq1.xml · nonDerivative · entry 1

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,155,637

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.11 to $24.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070155 · tm2216164-3_4seq1.xml · nonDerivative · entry 2

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,125,973

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.49. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-070155 · tm2216164-3_4seq1.xml · nonDerivative · entry 1

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,155,637

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.11 to $24.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 8,829,311 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 812,180 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,913,112 shares held of record by ILX Holdings II, LLC ("ILX II"), and 454,305 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-068558 · tm2217400-5_4seq1.xml · nonDerivative · entry 2

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,295,898

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.13. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,024,094 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 830,098 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,977,379 shares held of record by ILX Holdings II, LLC ("ILX II"), and 464,327 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-068558 · tm2217400-5_4seq1.xml · nonDerivative · entry 1

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,304,429

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.01 to $22.97. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,024,094 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 830,098 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,977,379 shares held of record by ILX Holdings II, LLC ("ILX II"), and 464,327 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-068557 · tm2217400-6_4seq1.xml · nonDerivative · entry 2

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,295,898

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.13. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,024,094 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 830,098 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,977,379 shares held of record by ILX Holdings II, LLC ("ILX II"), and 464,327 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-068557 · tm2217400-6_4seq1.xml · nonDerivative · entry 1

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,304,429

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.01 to $22.97. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,024,094 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 830,098 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,977,379 shares held of record by ILX Holdings II, LLC ("ILX II"), and 464,327 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067649 · tm2217400-4_4seq1.xml · nonDerivative · entry 5

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,366,923

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.205. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067649 · tm2217400-4_4seq1.xml · nonDerivative · entry 4

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,401,286

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067643 · tm2217400-3_4seq1.xml · nonDerivative · entry 5

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,366,923

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.205. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067643 · tm2217400-3_4seq1.xml · nonDerivative · entry 4

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,401,286

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.99. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067649 · tm2217400-4_4seq1.xml · nonDerivative · entry 3

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,671,116

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067649 · tm2217400-4_4seq1.xml · nonDerivative · entry 2

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,671,216

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.96. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067649 · tm2217400-4_4seq1.xml · nonDerivative · entry 1

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,752,574

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.27 to $21.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067643 · tm2217400-3_4seq1.xml · nonDerivative · entry 3

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,671,116

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067643 · tm2217400-3_4seq1.xml · nonDerivative · entry 2

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,671,216

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.00 to $22.96. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-067643 · tm2217400-3_4seq1.xml · nonDerivative · entry 1

RIVERSTONE HOLDINGS LLC · CIK 0001247497 · Director · 10% owner

Riverstone/Gower Mgmt Co Holdings, L.P. · CIK 0001706129 · Director · 10% owner

Riverstone Management Group, L.L.C. · CIK 0001705948 · Director · 10% owner

LEUSCHEN DAVID M · CIK 0001222726 · Director · 10% owner

LAPEYRE PIERRE F JR · CIK 0001232151 · Director · 10% owner

ILX Holdings II, LLC · CIK 0001925147 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,752,574

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.27 to $21.995. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,072,292 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 834,536 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 2,993,286 shares held of record by ILX Holdings II, LLC ("ILX II"), and 466,809 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-22-066750 · tm2217400-2_4seq1.xml · nonDerivative · entry 4

Riverstone Energy Partners V, L.P. · CIK 0001597142 · Director · 10% owner

Riverstone Talos Energy Equityco LLC · CIK 0001741035 · Director · 10% owner

Riverstone V Talos Holdings, L.P. · CIK 0001741036 · Director · 10% owner

Riverstone Global Energy & Power Fund V (FT), L.P. · CIK 0001741037 · Director · 10% owner

Riverstone Energy GP V, LLC · CIK 0001597157 · Director · 10% owner

Riverstone Energy GP V Corp. · CIK 0001706510 · Director · 10% owner

Riverstone Talos Energy Debtco LLC · CIK 0001741038 · Director · 10% owner

Riverstone V Castex 2014 Holdings, L.P. · CIK 0001925215 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 13,831,116

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.01 to $22.52. The reporting person undertakes to provide 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 shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Following the transactions reported herein, includes 9,387,346 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 863,517 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,097,234 shares held of record by ILX Holdings II, LLC ("ILX II"), and 483,019 shares held of record by Riverstone V Castex 2014 Holdings, L.P. ("Castex 2014").

F4 · ownership.nature: David M. Leuschen and Pierre F. Lapeyre, Jr. are the managing directors of Riverstone Management Group, L.L.C., which is the general partner of Riverstone/Gower Mgmt Co Holdings, L.P. ("Riverstone/Gower"), which is the sole member of Riverstone Holdings LLC ("Riverstone Holdings"), which is the sole shareholder of Riverstone Energy GP V Corp., which is the managing member of Riverstone Energy GP V, LLC, which is the general partner of Riverstone Energy Partners V, L.P. ("Riverstone Energy Partners V"), which is the general partner of Riverstone Global Energy and Power Fund V (FT), L.P., which is the general partner of Riverstone V Talos Holdings, L.P., which is the managing member of Riverstone Equityco and the sole manager of Riverstone Debtco.

F5 · ownership.nature: In addition, Riverstone Energy Partners V owns an indirect interest in Castex 2014 and in ILX II. Each of the foregoing entity or person disclaims any such beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.