TALO

SEC source: 0001104659-22-066750 · tm2217400-2_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: 13,964,143

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 $21.645 to $21.95. 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.

SEC source: 0001104659-22-066749 · tm2217400-1_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

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: 13,831,116

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.

SEC source: 0001104659-22-066749 · tm2217400-1_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

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: 13,964,143

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 $21.645 to $21.95. 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.

SEC source: 0001104659-22-066750 · tm2217400-2_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: 13,968,622

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 $22.26. 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.

SEC source: 0001104659-22-066750 · tm2217400-2_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: 14,027,840

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 $21.51 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 9,387,346 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.

SEC source: 0001104659-22-066749 · tm2217400-1_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

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: 13,968,622

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 $22.26. 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.

SEC source: 0001104659-22-066749 · tm2217400-1_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

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: 14,027,840

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 $21.51 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 9,387,346 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.

SEC source: 0001104659-22-065297 · tm2216697-4_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: 14,142,754

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 $21.00 to $21.78. 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 9,598,859 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 882,973 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,167,020 shares held of record by ILX Holdings II, LLC ("ILX II"), and 493,902 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: 0001104659-22-065297 · tm2216697-4_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: 14,246,767

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 $20.635 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 9,598,859 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 882,973 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,167,020 shares held of record by ILX Holdings II, LLC ("ILX II"), and 493,902 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: 0001104659-22-065292 · tm2216697-3_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: 14,142,754

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 $21.00 to $21.78. 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 9,598,859 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 882,973 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,167,020 shares held of record by ILX Holdings II, LLC ("ILX II"), and 493,902 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: 0001104659-22-065292 · tm2216697-3_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: 14,246,767

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 $20.635 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 9,598,859 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 882,973 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,167,020 shares held of record by ILX Holdings II, LLC ("ILX II"), and 493,902 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: 0001104659-22-065297 · tm2216697-4_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: 14,274,427

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 $20.62. 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 9,598,859 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 882,973 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,167,020 shares held of record by ILX Holdings II, LLC ("ILX II"), and 493,902 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: 0001104659-22-065292 · tm2216697-3_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: 14,274,427

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 $20.62. 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 9,598,859 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 882,973 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,167,020 shares held of record by ILX Holdings II, LLC ("ILX II"), and 493,902 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: 0001104659-22-064269 · tm2216697-2_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: 14,340,996

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 $20.00 to $20.43. 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 9,733,408 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 895,350 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,211,413 shares held of record by ILX Holdings II, LLC ("ILX II"), and 500,825 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: 0001104659-22-064273 · tm2216697-1_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: 14,340,996

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 $20.00 to $20.43. 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 9,733,408 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 895,350 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,211,413 shares held of record by ILX Holdings II, LLC ("ILX II"), and 500,825 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: 0001104659-22-064269 · tm2216697-2_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: 14,437,196

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 $19.00 to $19.37. 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 9,733,408 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 895,350 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,211,413 shares held of record by ILX Holdings II, LLC ("ILX II"), and 500,825 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: 0001104659-22-064273 · tm2216697-1_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: 14,437,196

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 $19.00 to $19.37. 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 9,733,408 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 895,350 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,211,413 shares held of record by ILX Holdings II, LLC ("ILX II"), and 500,825 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: 0001104659-22-063401 · tm2216164-2_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: 14,472,477

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 $19.00 to $19.47. 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 9,822,646 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 903,559 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,240,855 shares held of record by ILX Holdings II, LLC ("ILX II"), and 505,417 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: 0001104659-22-063399 · tm2216164-1_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: 14,472,477

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 $19.00 to $19.47. 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 9,822,646 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 903,559 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,240,855 shares held of record by ILX Holdings II, LLC ("ILX II"), and 505,417 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: 0001104659-22-063401 · tm2216164-2_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: 14,587,383

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 $20.00 to $20.07. 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 9,822,646 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 903,559 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,240,855 shares held of record by ILX Holdings II, LLC ("ILX II"), and 505,417 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: 0001104659-22-063401 · tm2216164-2_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: 14,588,468

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 $19.00 to $19.99. 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 9,822,646 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 903,559 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,240,855 shares held of record by ILX Holdings II, LLC ("ILX II"), and 505,417 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: 0001104659-22-063399 · tm2216164-1_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: 14,587,383

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 $20.00 to $20.07. 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 9,822,646 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 903,559 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,240,855 shares held of record by ILX Holdings II, LLC ("ILX II"), and 505,417 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: 0001104659-22-063399 · tm2216164-1_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: 14,588,468

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 $19.00 to $19.99. 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 9,822,646 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 903,559 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,240,855 shares held of record by ILX Holdings II, LLC ("ILX II"), and 505,417 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: 0001104659-22-062472 · tm2215952-2_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: 14,711,735

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 $19.00 to $19.55. 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 9,985,039 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 918,493 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,294,432 shares held of record by ILX Holdings II, LLC ("ILX II"), and 513,771 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: 0001104659-22-062469 · tm2215952-1_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: 14,711,735

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 $19.00 to $19.55. 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 9,985,039 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 918,493 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,294,432 shares held of record by ILX Holdings II, LLC ("ILX II"), and 513,771 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: 0001104659-22-062472 · tm2215952-2_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: 14,870,735

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 $19.00 to $19.58. 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 9,985,039 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 918,493 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,294,432 shares held of record by ILX Holdings II, LLC ("ILX II"), and 513,771 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: 0001104659-22-062469 · tm2215952-1_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: 14,870,735

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 $19.00 to $19.58. 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 9,985,039 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 918,493 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,294,432 shares held of record by ILX Holdings II, LLC ("ILX II"), and 513,771 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: 0000899243-22-018152 · doc4.xml · derivative · entry 3

Glover Paula R · CIK 0001861282 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,265 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The restricted stock units ("RSUs") were granted on May 12, 2021, vested on May 12, 2022, and settled on May 12, 2022. The RSUs represent the economic equivalent of one share of common stock, par value $0.01 per share (the "Common Stock") of Talos Energy Inc. Pursuant to the terms of the applicable award agreement, 60% of the RSUs were settled in Common Stock and 40% were settled in cash.

F1 · derivative.exercise_date: The restricted stock units ("RSUs") were granted on May 12, 2021, vested on May 12, 2022, and settled on May 12, 2022. The RSUs represent the economic equivalent of one share of common stock, par value $0.01 per share (the "Common Stock") of Talos Energy Inc. Pursuant to the terms of the applicable award agreement, 60% of the RSUs were settled in Common Stock and 40% were settled in cash.

F1 · derivative.expiration_date: The restricted stock units ("RSUs") were granted on May 12, 2021, vested on May 12, 2022, and settled on May 12, 2022. The RSUs represent the economic equivalent of one share of common stock, par value $0.01 per share (the "Common Stock") of Talos Energy Inc. Pursuant to the terms of the applicable award agreement, 60% of the RSUs were settled in Common Stock and 40% were settled in cash.

SEC source: 0000899243-22-018152 · doc4.xml · nonDerivative · entry 2

Glover Paula R · CIK 0001861282 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,159

F2 · security: Pursuant to the terms of the applicable award agreement, 40% of the RSUs originally granted on May 12, 2021, which were settled on May 12, 2022, were settled in cash.

SEC source: 0000899243-22-018152 · doc4.xml · nonDerivative · entry 1

Glover Paula R · CIK 0001861282 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,265

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The restricted stock units ("RSUs") were granted on May 12, 2021, vested on May 12, 2022, and settled on May 12, 2022. The RSUs represent the economic equivalent of one share of common stock, par value $0.01 per share (the "Common Stock") of Talos Energy Inc. Pursuant to the terms of the applicable award agreement, 60% of the RSUs were settled in Common Stock and 40% were settled in cash.

SEC source: 0001104659-22-058816 · tm2214596-6_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: 14,919,233

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 $19.00 to $19.15. 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 10,125,870 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,448 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,340,897 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,018 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: 0001104659-22-058813 · tm2214596-5_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: 14,919,233

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 $19.00 to $19.15. 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 10,125,870 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,448 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,340,897 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,018 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: 0001104659-22-057544 · tm2214596-4_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: 14,922,133

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 $20.00 to $20.165. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057544 · tm2214596-4_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: 14,923,858

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 $19.38 to $19.985. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057546 · tm2214596-3_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: 14,922,133

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 $20.00 to $20.165. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057546 · tm2214596-3_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: 14,923,858

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 $19.38 to $19.985. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057544 · tm2214596-4_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: 15,020,560

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 $21.02 to $21.31. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057544 · tm2214596-4_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: 15,025,323

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 $20.03 to $20.99. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057544 · tm2214596-4_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: 15,053,234

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 $19.14 to $19.98. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057546 · tm2214596-3_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: 15,020,560

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 $21.02 to $21.31. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057546 · tm2214596-3_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: 15,025,323

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 $20.03 to $20.99. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-057546 · tm2214596-3_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: 15,053,234

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 $19.14 to $19.98. 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 10,127,838 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 931,629 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,341,547 shares held of record by ILX Holdings II, LLC ("ILX II"), and 521,119 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: 0001104659-22-056498 · tm2214596-2_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: 15,142,221

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 $20.00 to $20.875. 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 10,277,215 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 945,369 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,390,832 shares held of record by ILX Holdings II, LLC ("ILX II"), and 528,805 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: 0001104659-22-056498 · tm2214596-2_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: 15,261,247

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 $19.59 to $19.995. 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 10,277,215 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 945,369 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,390,832 shares held of record by ILX Holdings II, LLC ("ILX II"), and 528,805 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: 0001104659-22-056494 · tm2214596-1_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: 15,142,221

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 $20.00 to $20.875. 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 10,277,215 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 945,369 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,390,832 shares held of record by ILX Holdings II, LLC ("ILX II"), and 528,805 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: 0001104659-22-056494 · tm2214596-1_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: 15,261,247

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 $19.59 to $19.995. 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 10,277,215 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 945,369 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,390,832 shares held of record by ILX Holdings II, LLC ("ILX II"), and 528,805 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: 0001104659-22-056498 · tm2214596-2_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: 15,314,708

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 $19.00 to $19.78. 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 10,277,215 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 945,369 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,390,832 shares held of record by ILX Holdings II, LLC ("ILX II"), and 528,805 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: 0001104659-22-056494 · tm2214596-1_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: 15,314,708

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 $19.00 to $19.78. 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 10,277,215 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 945,369 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,390,832 shares held of record by ILX Holdings II, LLC ("ILX II"), and 528,805 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: 0001104659-22-054694 · tm2214118-2_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: 15,481,005

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 $19.00 to $19.10. 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 10,507,152 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 966,520 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,466,696 shares held of record by ILX Holdings II, LLC ("ILX II"), and 540,637 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: 0001104659-22-054689 · tm2214118-1_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: 15,481,005

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 $19.00 to $19.10. 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 10,507,152 shares held of record by Riverstone Talos Energy Equityco LLC ("Riverstone Equityco"), 966,520 shares held of record by Riverstone Talos Energy Debtco LLC ("Riverstone Debtco"), 3,466,696 shares held of record by ILX Holdings II, LLC ("ILX II"), and 540,637 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.