AMENDMENT NO. 1 TO SCHEDULE TO

This Amendment No. 1 (this "Amendment No. 1") amends and supplements the Tender Offer Statement on Schedule TO originally filed with the Securities and Exchange Commission by Optimum Communications, Inc., a Delaware corporation ("Optimum" or the "Company") and CSC Investments II LLC, a Delaware limited liability company ("CSC Investments II") and a wholly owned subsidiary of Optimum, on June 1, 2026 (the "Schedule TO") relating to the offer by CSC Investments II to purchase for cash up to 120,000,000 shares of Optimum’s Class A Common Stock, par value $0.01 per share (the "Class A Common Stock"), in an amount such that the amount of cash used to purchase such Class A Common Stock accepted for purchase by CSC Investments II shall not exceed $300 million. The offer by CSC Investments II was made upon the terms and subject to the conditions described in the Offer to Purchase, dated June 1, 2026, a copy of which was filed as Exhibit (a)(1)(A) to the Schedule TO (together with such amendments or supplements thereto, the "Offer to Purchase"), and in the related Letter of Transmittal (the "Letter of Transmittal," and together with the Offer to Purchase, as they may be amended or supplemented from time to time, the "Offer"), a copy of which was filed as Exhibit (a)(1)(B) to the Schedule TO.

The purpose of this Amendment No. 1 is to amend and supplement the Schedule TO and the Offer to Purchase. Only those items amended or supplemented are reported in this Amendment No. 1. Except as specifically provided herein, the information contained in the Schedule TO, the Offer to Purchase and the Letter of Transmittal remains unchanged. This Amendment No. 1 should be read together with the Schedule TO and all exhibits attached thereto, including the Offer to Purchase and the Letter of Transmittal, as each may be amended or supplemented from time to time.

As of June 22, 2026, the Company is aware of one complaint that has been filed in connection with the Offer by a purported stockholder of Optimum against Optimum (as nominal defendant), Next Alt S.à.r.l., Next Partner, L.P., the individual members of Optimum’s board of directors and certain members of executive management (the "Defendants"). Paul Berger, as trustee for the Paul Berger Revocable Trust ("Plaintiff"), brought direct and purported derivative claims on behalf of himself and all other similarly situated stockholders of Optimum Communications, Inc. See Berger v. Drahi (Del. Ch. C.A. No. 2026-0766-PAF). The Complaint asserts three claims for Defendants’ alleged breach of fiduciary duties. One claim is a direct claim against the directors and one executive for allegedly disseminating materially misleading or omissive materials in connection with the Offer. Plaintiff announced his intention to seek to enjoin the Defendants from proceeding with the Offer unless the Defendants disclose additional information alleged to have been omitted from the Offer to Purchase and/or recover damages for the Defendants’ alleged breaches of fiduciary duties.

The Company and the other Defendants believe that the Complaint is without merit and that no supplemental disclosure to the Offer to Purchase was or is required under any applicable law, rule or regulation. However, solely to minimize the burden and expense of litigation, avoid nuisance and potential delay or disruption to the Offer and provide additional information to the Company’s stockholders, the Company has determined to voluntarily supplement the Offer to Purchase with the below disclosures. The Company believes that the disclosures in the Offer to Purchase comply fully with applicable law and nothing in the supplemental disclosures will be deemed an admission of the legal necessity or materiality under applicable law of any of the disclosures set forth herein or of the legal merit of the legal proceedings described in the Offer to Purchase.