OPTU

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 8

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,549,309

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 8

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,549,309

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 7

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,548,909

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 7

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,548,909

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 6

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,377,198

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 6

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,377,198

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 5

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,842,007

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 5

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,842,007

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 4

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,791,471

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 4

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 18,791,471

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0000947871-26-000745 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 868,454

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 3

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,500,000

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 3

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,500,000

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 2

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,379,042

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 2

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,379,042

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-108531 · ownership.xml · nonDerivative · entry 1

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

MILFAM GP, LLC · CIK 0002159232 · 10% owner

Dark Mirage, LP · CIK 0002023628 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 16,646,763

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0001213900-26-095292 · ownership.xml · nonDerivative · entry 1

SUBIN NEIL S · CIK 0001201333 · 10% owner

MILFAM LLC · CIK 0001728825 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 16,646,763

F1 · ownership.nature: Represents shares of Class A Common Stock, par value $0.01 per share ("Class A Common Shares"), of Optimum Communications, Inc. (the "Issuer") owned by Dark Mirage, LP. MILFAM LLC is the investment advisor of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. MILFAM GP, LLC is the general partner of Dark Mirage, LP and therefore may be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin is the President and Manager of MILFAM LLC, which is the Manager of MILFAM GP, LLC, consequently, he may also be deemed the beneficial owner of the Class A Common Shares owned by Dark Mirage, LP. Mr. Subin, MILFAM GP, LLC and MILFAM LLC each disclaims beneficial ownership of any Class A Common Shares other than to the extent he or it may have a pecuniary interest therein.

SEC source: 0000947871-26-000675 · ownership.xml · nonDerivative · entry 2

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 888,454

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

SEC source: 0000947871-26-000675 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 908,454

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000604 · ownership.xml · nonDerivative · entry 2

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 933,381

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

SEC source: 0000947871-26-000602 · ownership.xml · nonDerivative · entry 1

Mathew Dennis · CIK 0001946788 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,759,448

F1 · date: On May 29, 2026, Mr. Mathew agreed to contribute 550,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 1,377 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Mathew agreed to contribute 550,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 1,377 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Mathew agreed to contribute 550,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 1,377 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Mathew agreed to contribute 550,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 1,377 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000606 · ownership.xml · nonDerivative · entry 1

Parker Michael C. · CIK 0002057926 · President of Consumer Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,011,488

F1 · date: On May 29, 2026, Mr. Parker agreed to contribute 218,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 547 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Parker agreed to contribute 218,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 547 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Parker agreed to contribute 218,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 547 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Parker agreed to contribute 218,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 547 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000607 · ownership.xml · nonDerivative · entry 1

Sirota Marc · CIK 0001968787 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,034,406

F1 · date: On May 29, 2026, Mr. Sirota agreed to contribute 296,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 740 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Sirota agreed to contribute 296,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 740 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Sirota agreed to contribute 296,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 740 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Sirota agreed to contribute 296,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 740 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000929638-26-002106 · form4.xml · derivative · entry 2

Next Alt S.a.r.l. · CIK 0001709662 · Director · 10% owner

Drahi Patrick · CIK 0001709689 · Director · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,731,066

Underlying: Class A common stock · 74,153,348 shares

Expires not disclosed

F4 · derivative.exercise_price: Each share of Class B common stock of the issuer is convertible into one share of Class A common stock of the issuer for no consideration.

F2 · date: Next Alt S.a r.l. is an indirect wholly controlled personal holding company of Patrick Drahi. Next Alt S.a r.l. is a party to a stockholders agreement with the issuer pursuant to which Next Alt S.a r.l. has certain rights to appoint directors of the issuer. Each Reporting Person disclaims beneficial ownership of all interests reported on this Form 4 except to the extent of such Reporting Person's pecuniary interests.

F3 · date: On May 29, 2026, Next Alt S.a r.l. agreed to contribute 74,153,348 shares of Class B common stock of the issuer to Next Partner, L.P., an entity owned and controlled by Next Alt S.a r.l. On May 29, 2026, Next Partner agreed to deliver an aggregate of 74,153,348 shares of Class B common stock of the issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the issuer, in exchange for 185,383.37 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F2 · deemedExecutionDate: Next Alt S.a r.l. is an indirect wholly controlled personal holding company of Patrick Drahi. Next Alt S.a r.l. is a party to a stockholders agreement with the issuer pursuant to which Next Alt S.a r.l. has certain rights to appoint directors of the issuer. Each Reporting Person disclaims beneficial ownership of all interests reported on this Form 4 except to the extent of such Reporting Person's pecuniary interests.

F3 · deemedExecutionDate: On May 29, 2026, Next Alt S.a r.l. agreed to contribute 74,153,348 shares of Class B common stock of the issuer to Next Partner, L.P., an entity owned and controlled by Next Alt S.a r.l. On May 29, 2026, Next Partner agreed to deliver an aggregate of 74,153,348 shares of Class B common stock of the issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the issuer, in exchange for 185,383.37 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F4 · derivative.exercise_date: Each share of Class B common stock of the issuer is convertible into one share of Class A common stock of the issuer for no consideration.

F4 · derivative.expiration_date: Each share of Class B common stock of the issuer is convertible into one share of Class A common stock of the issuer for no consideration.

F2 · ownership.direct: Next Alt S.a r.l. is an indirect wholly controlled personal holding company of Patrick Drahi. Next Alt S.a r.l. is a party to a stockholders agreement with the issuer pursuant to which Next Alt S.a r.l. has certain rights to appoint directors of the issuer. Each Reporting Person disclaims beneficial ownership of all interests reported on this Form 4 except to the extent of such Reporting Person's pecuniary interests.

SEC source: 0000929638-26-002106 · form4.xml · nonDerivative · entry 1

Next Alt S.a.r.l. · CIK 0001709662 · Director · 10% owner

Drahi Patrick · CIK 0001709689 · Director · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · date: On May 29, 2026, Next Alt S.a r.l. agreed to contribute 5,846,652 shares of Class A common stock of the issuer to Next Partner, L.P., an entity owned and controlled by Next Alt S.a r.l. On May 29, 2026, Next Partner agreed to deliver an aggregate of 5,846,652 shares of Class A common stock of the issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the issuer, in exchange for 14,616.63 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F2 · date: Next Alt S.a r.l. is an indirect wholly controlled personal holding company of Patrick Drahi. Next Alt S.a r.l. is a party to a stockholders agreement with the issuer pursuant to which Next Alt S.a r.l. has certain rights to appoint directors of the issuer. Each Reporting Person disclaims beneficial ownership of all interests reported on this Form 4 except to the extent of such Reporting Person's pecuniary interests.

F1 · deemedExecutionDate: On May 29, 2026, Next Alt S.a r.l. agreed to contribute 5,846,652 shares of Class A common stock of the issuer to Next Partner, L.P., an entity owned and controlled by Next Alt S.a r.l. On May 29, 2026, Next Partner agreed to deliver an aggregate of 5,846,652 shares of Class A common stock of the issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the issuer, in exchange for 14,616.63 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F2 · deemedExecutionDate: Next Alt S.a r.l. is an indirect wholly controlled personal holding company of Patrick Drahi. Next Alt S.a r.l. is a party to a stockholders agreement with the issuer pursuant to which Next Alt S.a r.l. has certain rights to appoint directors of the issuer. Each Reporting Person disclaims beneficial ownership of all interests reported on this Form 4 except to the extent of such Reporting Person's pecuniary interests.

F1 · shares: On May 29, 2026, Next Alt S.a r.l. agreed to contribute 5,846,652 shares of Class A common stock of the issuer to Next Partner, L.P., an entity owned and controlled by Next Alt S.a r.l. On May 29, 2026, Next Partner agreed to deliver an aggregate of 5,846,652 shares of Class A common stock of the issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the issuer, in exchange for 14,616.63 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Next Alt S.a r.l. agreed to contribute 5,846,652 shares of Class A common stock of the issuer to Next Partner, L.P., an entity owned and controlled by Next Alt S.a r.l. On May 29, 2026, Next Partner agreed to deliver an aggregate of 5,846,652 shares of Class A common stock of the issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the issuer, in exchange for 14,616.63 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F2 · ownership.direct: Next Alt S.a r.l. is an indirect wholly controlled personal holding company of Patrick Drahi. Next Alt S.a r.l. is a party to a stockholders agreement with the issuer pursuant to which Next Alt S.a r.l. has certain rights to appoint directors of the issuer. Each Reporting Person disclaims beneficial ownership of all interests reported on this Form 4 except to the extent of such Reporting Person's pecuniary interests.

SEC source: 0000947871-26-000608 · ownership.xml · nonDerivative · entry 1

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,546,441

F1 · date: On May 29, 2026, Mr. Goei agreed to contribute 2,610,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 6,526 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Goei agreed to contribute 2,610,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 6,526 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Goei agreed to contribute 2,610,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 6,526 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Goei agreed to contribute 2,610,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 6,526 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000599 · ownership.xml · nonDerivative · entry 1

Stewart Charles · CIK 0001708800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,925

F1 · date: On May 29, 2026, Mr. Stewart agreed to contribute 10,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 25 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Stewart agreed to contribute 10,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 25 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Stewart agreed to contribute 10,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 25 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Stewart agreed to contribute 10,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 25 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000603 · ownership.xml · nonDerivative · entry 1

Svider Raymond · CIK 0001467288 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,897

F1 · date: On May 29, 2026, Mr. Svider agreed to contribute 82,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 207 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Svider agreed to contribute 82,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 207 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Svider agreed to contribute 82,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 207 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Svider agreed to contribute 82,800 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 207 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000600 · ownership.xml · nonDerivative · entry 1

SCHNABEL SUSAN C · CIK 0001207059 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,697

F1 · date: On May 29, 2026, Ms. Schnabel agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Ms. Schnabel agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Ms. Schnabel agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Ms. Schnabel agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000604 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 953,381

F1 · date: On May 29, 2026, Mr. Olsen agreed to contribute 246,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 616 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Olsen agreed to contribute 246,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 616 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Olsen agreed to contribute 246,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 616 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Olsen agreed to contribute 246,400 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 616 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000601 · ownership.xml · nonDerivative · entry 1

Mullen Mark · CIK 0001708875 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,697

F1 · date: On May 29, 2026, Mr. Mullen agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · deemedExecutionDate: On May 29, 2026, Mr. Mullen agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · shares: On May 29, 2026, Mr. Mullen agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

F1 · price: On May 29, 2026, Mr. Mullen agreed to contribute 58,000 shares of Class A common stock of the Issuer to CSC Investments II LLC ("CSC"), a wholly-owned subsidiary of the Issuer, in exchange for 145 Preferred Units in CSC. The exchange was approved in advance by the Board of Directors of the Issuer pursuant to Rule 16b-3(e) under the Securities Exchange Act of 1934.

SEC source: 0000947871-26-000490 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,199,781

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

SEC source: 0000947871-26-000426 · ownership.xml · nonDerivative · entry 1

Bruzzese Maria · CIK 0001949569 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 450,658

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000398 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,219,781

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

SEC source: 0000947871-26-000218 · ownership.xml · nonDerivative · entry 2

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,239,781

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

SEC source: 0000947871-26-000217 · ownership.xml · nonDerivative · entry 1

Mathew Dennis · CIK 0001946788 · Director · Chairman and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,310,248

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000220 · ownership.xml · nonDerivative · entry 1

Parker Michael C. · CIK 0002057926 · President of Consumer Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,230,288

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000215 · ownership.xml · nonDerivative · entry 1

Sirota Marc · CIK 0001968787 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,029,384

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000216 · ownership.xml · nonDerivative · entry 1

Bruzzese Maria · CIK 0001949569 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 456,572

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000218 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,259,781

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Optimum Communications, Inc. (f/k/a Altice USA, Inc.) 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-26-000196 · ownership.xml · nonDerivative · entry 1

Olsen Michael · CIK 0001773608 · General Counsel and CCRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,496,277

F1 · price: Represents the weighted average price of the Class A common stock sold on February 17, 2026, ranging from a low of $1.60 to a high of $1.61 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer to provide full information regarding the number of shares purchased at each separate price.

SEC source: 0000947871-25-001100 · ownership.xml · nonDerivative · entry 1

Parker Michael C. · CIK 0002057926 · President of Consumer Services

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,367,505

F1 · kind: Represents shares of the Issuer's Class A common stock withheld for taxes upon the vesting of restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended.

SEC source: 0000947871-25-001076 · ownership.xml · nonDerivative · entry 2

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,156,841

F2 · price: Represents the weighted average sale price of the shares sold on December 10, 2025, ranging from a low of $1.75 to a high of $1.83 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001076 · ownership.xml · nonDerivative · entry 1

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,156,841

F1 · price: Represents the weighted average sale price of the shares sold on December 9, 2025, ranging from a low of $1.74 to a high of $1.785 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001070 · ownership.xml · nonDerivative · entry 1

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,671,023

F1 · price: Represents the weighted average sale price of the shares sold on December 5, 2025, ranging from a low of $1.90 to a high of $1.9075 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001065 · ownership.xml · nonDerivative · entry 2

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,020,605

F2 · price: Represents the weighted average sale price of the shares sold on December 4, 2025, ranging from a low of $1.90 to a high of $1.92 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001065 · ownership.xml · nonDerivative · entry 1

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,130,110

F1 · price: Represents the weighted average sale price of the shares sold on December 3, 2025, ranging from a low of $1.90 to a high of $1.9050 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001061 · ownership.xml · nonDerivative · entry 2

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,244,520

F2 · price: Represents the weighted average sale price of the shares sold on December 2, 2025, ranging from a low of $1.90 to a high of $1.9050 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001061 · ownership.xml · nonDerivative · entry 1

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,276,748

F1 · price: Represents the weighted average sale price of the shares sold on December 1, 2025, ranging from a low of $1.90 to a high of $1.9550 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

SEC source: 0000947871-25-001054 · ownership.xml · nonDerivative · entry 1

Goei Dexter · CIK 0001708711 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,461,646

F1 · price: Represents the weighted average sale price of the shares sold ranging from a low of $1.90 to a high of $2.01 per share. The Reporting Person undertakes, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

F2 · balance_after: Includes 7,603,359 shares previously held through personal holding companies which were distributed to the Reporting Person and are now owned directly.