OPTU · Optimum Communications, Inc.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of April 8, 2026, 2027 and 2028.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of March 1, 2026, 2027 and 2028.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of March 1, 2026, 2027 and 2028.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of March 1, 2026, 2027 and 2028.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of March 1, 2026, 2027 and 2028.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of March 1, 2026, 2027 and 2028.

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.

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.

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.

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.

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.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of February 12, 2026 and February 12, 2027.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of February 12, 2026 and February 12, 2027.

Represents restricted share units granted pursuant to the Amended and Restated Altice USA 2017 Long Term Incentive Plan, as amended. Each restricted share unit represents a contingent right to receive one share of the Issuer's Class A common stock. The restricted share units vest in equal installments on each of February 12, 2026 and February 12, 2027.

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