CSG Systems (NASDAQ: CSGS) furnishes Q4 and full-year 2025 results press release

Rhea-AI Filing Summary

CSG Systems International, Inc. furnished an update on its business by issuing a press release covering financial results for the quarter and year ended December 31, 2025. The company submitted this press release as Exhibit 99.1 to this current report.

The press release discusses CSG’s performance using both GAAP and non-GAAP financial measures, with reconciliations to comparable GAAP figures. CSG explains that non-GAAP measures are supplemental and should be evaluated together with traditional GAAP results, and indicates that further details are also available on its website.

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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): February 4, 2026

CSG SYSTEMS INTERNATIONAL, INC.

(Exact name of registrant as specified in its charter)

Delaware		0-27512		47-0783182
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)
169 Inverness Dr W, Suite 300, Englewood, CO				80112
(Address of principal executive offices)				(Zip Code)

Registrant’s telephone number, including area code: (303) 200-2000

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 (see General Instructions A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, Par Value $0.01 Per Share		CSGS		NASDAQ Stock Market LLC.

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 2.02. Results of Operations and Financial Condition.

The following information is furnished pursuant to Item 2.02 (Results of Operations and Financial Condition). 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 February 4, 2026, CSG Systems International, Inc. (“CSG”) issued a press release relating to the results of its operations for the quarter and year ended December 31, 2025. A copy of such press release is attached to this Form 8-K as Exhibit 99.1 and hereby incorporated by reference.

In the attached press release, CSG makes reference to non-GAAP financial measures. Non-GAAP financial measures are not measures of performance under GAAP, and therefore should not be considered in isolation or as a substitute for GAAP financial information. There are limitations with the use of non-GAAP financial measures since they are not based on any comprehensive set of accounting rules or principles, and the way in which CSG calculates non-GAAP financial measures may differ from the way in which other companies calculate similar non-GAAP financial measures. A more detailed discussion of CSG’s use of non-GAAP financial measures, to include reconciliations of the non-GAAP financial measures to the comparable GAAP financial measures, is contained in the attached press release and is posted to the Company’s website at www.csgi.com.

9.01. Financial Statements and Exhibits.

(d) Exhibits

99.1		Press release of CSG Systems International, Inc. dated February 4, 2026
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

1

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.

			CSG SYSTEMS INTERNATIONAL, INC.
Date:	February 4, 2026	By:	/s/ Lori J. Szwanek
			Lori J. Szwanek Chief Accounting Officer

FAQ

What did CSGS disclose in this 8-K filing?

CSG Systems International furnished a press release summarizing its financial results for the quarter and year ended December 31, 2025, and attached it as Exhibit 99.1, providing investors with a consolidated update on recent business performance.

Which period’s results does CSGS cover in the furnished press release?

The press release covers CSG Systems International’s results of operations for both the quarter and the full year ended December 31, 2025, offering a combined view of recent quarterly performance and overall annual financial trends.

Are CSGS’s non-GAAP financial measures explained in this disclosure?

Yes. CSG Systems International notes that the press release includes non-GAAP financial measures and provides reconciliations to comparable GAAP measures, along with a discussion of how and why these supplemental metrics are used by the company.

Where can investors find the full CSGS earnings details?

Investors can review CSG Systems International’s detailed financial results in the press release attached as Exhibit 99.1 to the 8-K and in related materials posted on the company’s website at www.csgi.com, including non-GAAP to GAAP reconciliations.

Is the CSGS earnings press release considered filed or furnished?

The company states that the information related to results of operations is furnished under Item 2.02 and is not deemed filed for purposes of Section 18 of the Exchange Act, limiting certain legal liabilities associated with formally filed information.

Who signed the CSGS 8-K covering the 2025 results press release?

The 8-K was signed on behalf of CSG Systems International by Lori J. Szwanek in her capacity as Chief Accounting Officer, indicating management’s authorization of the furnished financial information and related exhibits in this current report.