UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

July 6, 2026

Optimum Communications, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware

(State of Incorporation)

(516) 803-2300

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Second Amended and Restated UnSub Credit Agreement

On July 6, 2026, Cablevision Litchfield, LLC (“Cablevision Litchfield”) and CSC Optimum Holdings, LLC (“CSC Optimum”), each an indirect wholly-owned subsidiary of Optimum Communications, Inc. (the “Company”), as borrowers, entered into the Second Amended and Restated Credit Agreement (the “Second A&R UnSub Credit Agreement”) with the guarantors party thereto, the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent and collateral agent.

The Second A&R UnSub Credit Agreement provides for, among other things, an incremental term loan commitment in an aggregate principal amount of $250 million. The loans made pursuant to such incremental term loan commitment (the “UnSub Incremental Term Loan”) have substantially similar terms as the term loans that have been outstanding under the Amended and Restated Credit Agreement, dated as of January 12, 2026 (as amended by Amendment No. 1, dated as of May 29, 2026), which term loans will remain outstanding under the Second A&R UnSub Credit Agreement, and will (i) mature on November 25, 2028, (ii) accrue interest at a fixed rate per annum equal to 9.000% and (iii) not amortize.

The proceeds from the UnSub Incremental Term Loan are intended to be used for general corporate purposes.

The foregoing summary of the terms of the Second A&R UnSub Credit Agreement is qualified in its entirety by reference to the full text of the Second A&R UnSub Credit Agreement filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

The information set forth above under Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference into this Item 2.03.

(d) Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.