{"url_path":"/sec/csgs/8-k/2026-02-05/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K/A","doc_date":"2026-02-05","source_url":"https://www.sec.gov/Archives/edgar/data/1005757/0001193125-26-039174-index.html","accession_number":"0001193125-26-039174","cik":"0001005757","ticker":"CSGS","issuer_name":"CSG SYSTEMS INTERNATIONAL INC","edgar_url":"https://www.sec.gov/Archives/edgar/data/1005757/0001193125-26-039174-index.html","primary_entity_key":"0001005757","primary_entity_name":"CSG SYSTEMS INTERNATIONAL INC"},"word_count":403,"has_tables":true,"body_markdown":"8-K/A\n\ntrue000100575700010057572026-02-042026-02-04\n\n \n\n \n\nUNITED STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWashington, D.C. 20549\n\nFORM 8-K/A\n\n(Amendment No. 1)\n\nCURRENT REPORT\n\nPURSUANT TO SECTION 13 or 15(d) OF THE\n\nSECURITIES EXCHANGE ACT OF 1934\n\nDate of Report (Date of earliest event reported): February 4, 2026\n\nCSG SYSTEMS INTERNATIONAL, INC.\n\n(Exact name of registrant as specified in its charter)\n\nDelaware\n\n0-27512\n\n47-0783182\n\n(State or other jurisdiction\n\nof incorporation)\n\n(Commission\n\nFile Number)\n\n(IRS Employer\n\nIdentification No.)\n\n169 Inverness Dr W, Suite 300, Englewood, CO\n\n80112\n\n(Address of principal executive offices)\n\n(Zip Code)\n\nRegistrant’s telephone number, including area code: (303) 200-2000\n\nCheck 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):\n\n \n\n☐\n\nWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)\n\n☐\n\nSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)\n\n☐\n\nPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))\n\n☐\n\nPre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))\n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n \n\nTitle of each class\n\n \n\nTrading\n\nSymbol(s)\n\n \n\nName of each exchange on which registered\n\nCommon Stock, Par Value $0.01 Per Share\n\n \n\nCSGS\n\n \n\nNASDAQ Stock Market LLC.\n\nIndicate 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).\n\nEmerging growth company ☐\n\nIf 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. ☐\n\n \n\n \n\n \n\n \n\nExplanatory Note\n\nCSG Systems International, Inc. (“CSG” or the “Company”) is filing this Amendment No. 1 to its February 4, 2026 Form 8-K for the sole purpose of furnishing the complete version of the press release originally furnished on February 4, 2026. The original version of the press release inadvertently omitted the Research and Development (“R&D”) line from the Company’s Condensed Consolidated Statements of Income (the “Income Statements”).\n\nThe press release filed as Exhibit 99.1 to this Form 8-K/A includes the R&D line in the Income Statements and no other changes have been made to the press release."}