CSG Systems International Inc. filed SEC Form 8-K: Entry into a Material Definitive Agreement, Regulation FD Disclosure, Financial Statements and Exhibits

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

CSG SYSTEMS INTERNATIONAL, INC.

(Exact name of Registrant as Specified in Its Charter)

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. ☐

Item 1.01 Entry into a Material Definitive Agreement.

Summary of Material Definitive Agreement. CSG Systems International, Inc. (“CSG”) is a party to a Master Subscriber Management System Agreement, dated August 1, 2017 (the “Current Agreement”) with Charter Communications Operating, LLC (“Charter”). The Current Agreement is scheduled to expire on March 31, 2028. For the second quarter ended June 30, 2025, CSG generated approximately 19% of its total revenue from Charter.

On September 4, 2025, CSG entered into an amendment (the “Amendment”) to the Current Agreement. The key terms of the Amendment are:

A copy of the Amendment, with confidential information redacted in accordance with SEC rules, will be filed as an exhibit to CSG’s Quarterly Report Form 10-Q for the quarter ended September 30, 2025.

Item 7.01 Regulation FD Disclosure.

The following information, including Exhibit 99.1 hereto, is furnished pursuant to Item 7.01 (Regulation FD Disclosure). This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

On September 4, 2025, CSG issued a press release announcing that it had entered into an Amendment with Charter. A copy of the press release is attached to this Form 8-K as Exhibit 99.1 and is incorporated into Item 7.01 by reference.

Item 9.01 Financial Statements and Exhibits.

(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.