{"url_path":"/sec/csgs/10-k/2026/item-16","section_key":"item-16","section_title":"Item 16 Form 10-K Summary","topic":"sec","document":{"doc_type":"10-K","doc_date":"2026-02-19","source_url":"https://www.sec.gov/Archives/edgar/data/1005757/0001193125-26-059632-index.html","accession_number":"0001193125-26-059632","cik":"0001005757","ticker":"CSGS","issuer_name":"CSG SYSTEMS INTERNATIONAL INC","edgar_url":"https://www.sec.gov/Archives/edgar/data/1005757/0001193125-26-059632-index.html","primary_entity_key":"0001005757","primary_entity_name":"CSG SYSTEMS INTERNATIONAL INC"},"word_count":4697,"has_tables":true,"body_markdown":"Item 16. Form 10-K Summary\n\nNone.\n\n75\n\n \n\nEXHIBIT INDEX\n\n \n\nExhibit\nNumber\n\nDescription\n\n \n\n \n\n2.01** (49)\n\n \n\n[Agreement and Plan of Merger, dated as of October 29, 2025, by and among CSG Systems International, Inc., NEC Corporation and Canvas Transaction Company, Inc., filed as Exhibit 2.1 to the 8-K dated October 29, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0001005757/000119312525254538/d939238d8k.htm)\n\n \n\n \n\n \n\n2.10 (7)\n\n[Implementation Agreement between CSG Systems International, Inc. and Intec](https://www.sec.gov/Archives/edgar/data/1005757/000119312510254259/dex210.htm)\n\n \n\n \n\n3.01 (1)\n\nRestated Certificate of Incorporation of the Company (P)\n\n \n\n \n\n3.02 (31)\n\n[Amended and Restated Bylaws of CSG Systems International, Inc.](https://www.sec.gov/Archives/edgar/data/1005757/000156459022029744/csgs-ex302_6.htm)\n\n \n\n \n\n3.03 (2)\n\n[Certificate of Amendment of Restated Certificate of Incorporation of CSG Systems International, Inc.](https://www.sec.gov/Archives/edgar/data/1005757/0000927356-97-000984.txt)\n\n \n\n \n\n \n\n3.04 (37)\n\n \n\n[Certificate of Amendment of Restated Certificate of Incorporation of CSG Systems International, Inc.](https://www.sec.gov/Archives/edgar/data/1005757/000095017023037789/csgs-ex3_04.htm)\n\n \n\n \n\n4.01 (1)\n\nForm of Common Stock Certificate (P)\n\n \n\n \n\n \n\n4.10 (47)\n\n \n\n[$600 Million Credit Agreement Dated As Of March 14, 2025, Among CSG Systems International, Inc., As Borrower, The Subsidiary Guarantors Party Hereto, Royal Bank Of Canada, As Administrative Agent, Collateral Agent, Swingline Lender And An Issuing Bank, Citizens Bank, N.A. And PNC Bank, National Association, As Co-Documentation Agents, The Lenders Party Hereto, And The Other Issuing Banks Party Hereto Royal Bank Of Canada, Wells Fargo Securities, LLC, HSBC Bank USA, N.A. And U.S. Bank National Association As Joint Lead Arrangers And Joint Bookrunner](https://www.sec.gov/Archives/edgar/data/1005757/000095017025066561/csgs-ex4_10.htm)\n\n \n\n \n\n \n\n4.20 (38)\n\n \n\n[Indenture, dated as of September 11, 2023, between CSG Systems International, Inc. and U.S. Bank Trust Company, National Association, as trustee](https://www.sec.gov/Archives/edgar/data/1005757/000095017023047516/csgs-ex4_20.htm)\n\n \n\n \n\n \n\n4.25 (38)\n\n \n\n[Form of 3.875% Convertible Senior Note due 2028 (included as Exhibit A in Exhibit 4.20)](https://www.sec.gov/Archives/edgar/data/1005757/000095017023047516/csgs-ex4_20.htm)\n\n \n\n \n\n \n\n4.60 (25)\n\n \n\n[$600.0 million Amended and Restated Credit Agreement dated September 13, 2021, among CSG Systems International, Inc., as Borrower, the Subsidiary Guarantors Party Hereto, Bank of America, N.A., as Administrative Agent, Collateral Agent, Swingline Lender and an Issuing Bank, Wells Fargo Bank, National Association, as Syndication Agent, BBVA, USA and U.S. Bank National Association, as Co-Documentation Agents, the Lenders Party Hereto, and the Other Issuing Banks Party Hereto BofA Securities, Inc. and Wells Fargo Securities, LLC, as Joint Lead Arrangers and Joint Bookrunners](https://www.sec.gov/Archives/edgar/data/1005757/000156459021054408/csgs-ex4_60.htm)\n\n \n\n \n\n \n\n4.60A (34)\n\n \n\n[First Amendment to Amended and Restated Credit Agreement](https://www.sec.gov/Archives/edgar/data/1005757/000095017023012822/csgs-ex4_60a.htm)\n\n \n\n \n\n \n\n4.60B (39)\n\n \n\n[Second Amendment to Amended and Restated Credit Agreement, dated September 5, 2023](https://www.sec.gov/Archives/edgar/data/1005757/000095017023046873/csgs-ex4_60b.htm)\n\n \n\n \n\n \n\n4.90 (17)\n\n[Description of Capital Stock](https://www.sec.gov/Archives/edgar/data/1005757/000156459020005691/csgs-ex490_358.htm)\n\n \n\n \n\n10.02 (29)+\n\n[Third Amended and Restated 1996 Employee Stock Purchase Plan, as adopted on May 18, 2022](https://www.sec.gov/Archives/edgar/data/1005757/000156459022020936/csgs-ex1002_6.htm)\n\n \n\n \n\n10.04 (36)+\n\n[CSG Systems International, Inc. Amended and Restated 2005 Stock Incentive Plan, as amended on May 17, 2023](https://www.sec.gov/Archives/edgar/data/1005757/000095017023023330/csgs-ex10_04.htm)\n\n \n\n \n\n10.05 (8)+\n\n[CSG Systems International, Inc. Performance Bonus Program, as amended on August 14, 2007](https://www.sec.gov/Archives/edgar/data/1005757/000119312511147686/dex1005.htm)\n\n \n\n \n\n10.06 (5)+\n\n[CSG Systems International, Inc. 2001 Stock Incentive Plan, as amended August 14, 2007](https://www.sec.gov/Archives/edgar/data/1005757/000119312507239944/dex1006.htm)\n\n \n\n \n\n10.15 (6)+\n\n[Form of Indemnification Agreement between CSG Systems International, Inc. and Directors and Executive Officers](https://www.sec.gov/Archives/edgar/data/1005757/000119312510114772/dex1015.htm)\n\n \n\n10.16 (4)+\n\n[Indemnification Agreement between CSG Systems International, Inc. and Mr. Ronald Cooper, dated November 16, 2006](https://www.sec.gov/Archives/edgar/data/1005757/000119312506238425/dex1016.htm)\n\n \n\n \n\n \n\n10.25** (37)\n\n \n\n[Amended and Restated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023037789/csgs-ex10_25.htm)\n\n \n\n \n\n10.26* (9)\n\n \n\n[Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459017021474/csgs-ex1026_191.htm)\n\n \n\n \n\n76\n\n \n\n10.26A* (9)\n\n \n\n[Second Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459017021474/csgs-ex1026a_189.htm)\n\n \n\n \n\n10.26B* (9)\n\n \n\n[Third Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459017021474/csgs-ex1026b_188.htm)\n\n \n\n \n\n \n\n10.26C* (9)\n\n \n\n[Fourth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459017021474/csgs-ex1026c_187.htm)\n\n \n\n \n\n10.26D (10)\n\n \n\n[First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018003012/csgs-ex1026d_176.htm)\n\n \n\n \n\n10.26E* (10)\n\n \n\n[Fifth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018003012/csgs-ex1026e_175.htm)\n\n \n\n \n\n10.26F* (10)\n\n \n\n[Sixth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018003012/csgs-ex1026f_174.htm)\n\n \n\n \n\n10.26G* (10)\n\n \n\n[Eighth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018003012/csgs-ex1026g_173.htm)\n\n \n\n \n\n10.26H* (10)\n\n \n\n[Ninth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018003012/csgs-ex1026h_172.htm)\n\n \n\n \n\n10.26I (10)\n\n \n\n[Tenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018003012/csgs-ex1026i_170.htm)\n\n \n\n \n\n \n\n10.26J* (11)\n\n \n\n[Eleventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018010923/csgs-ex1026j_77.htm)\n\n \n\n \n\n \n\n10.26K* (12)\n\n \n\n[Thirteenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018019087/csgs-ex1026k_93.htm)\n\n \n\n \n\n \n\n10.26L* (12)\n\n \n\n[Fifteenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018019087/csgs-ex1026l_60.htm)\n\n \n\n \n\n \n\n10.26M* (12)\n\n \n\n[Seventeenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018019087/csgs-ex1026m_58.htm)\n\n \n\n \n\n \n\n10.26N* (12)\n\n \n\n[Eighteenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018019087/csgs-ex1026n_59.htm)\n\n \n\n \n\n \n\n10.26O* (13)\n\n \n\n[Seventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018028815/csgs-ex1026o_101.htm)\n\n \n\n \n\n \n\n10.26P* (13)\n\n \n\n[Twelfth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018028815/csgs-ex1026p_109.htm)\n\n \n\n \n\n \n\n10.26Q* (13)\n\n \n\n[Fourteenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018028815/csgs-ex1026q_108.htm)\n\n \n\n \n\n \n\n10.26R* (13)\n\n \n\n[Nineteenth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459018028815/csgs-ex1026r_99.htm)\n\n \n\n \n\n \n\n10.26S* (14)\n\n \n\n[Twentieth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019015660/csgs-ex1026s_223.htm)\n\n \n\n \n\n \n\n10.26T* (15)\n\n \n\n[Twenty-Second Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019030588/csgs-ex1026t_87.htm)\n\n \n\n \n\n \n\n10.26U* (15)\n\n \n\n[Twenty-Fourth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019030588/csgs-ex1026u_86.htm)\n\n \n\n \n\n \n\n10.26V* (15)\n\n \n\n[Twenty-Fifth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019030588/csgs-ex1026v_89.htm)\n\n \n\n \n\n \n\n10.26W* (15)\n\n \n\n[Twenty-Sixth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019030588/csgs-ex1026w_88.htm)\n\n \n\n \n\n \n\n10.26X* (15)\n\n \n\n[Twenty-Seventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019030588/csgs-ex1026x_90.htm)\n\n77\n\n \n\n \n\n \n\n \n\n10.26Y* (15)\n\n \n\n[Twenty-Eighth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019030588/csgs-ex1026y_91.htm)\n\n \n\n \n\n \n\n10.26Z* (16)\n\n \n\n[Twenty-Third Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019039348/csgs-ex1026z_354.htm)\n\n \n\n \n\n \n\n10.26AA* (16)\n\n \n\n[Thirty-First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019039348/csgs-ex1026aa_358.htm)\n\n \n\n \n\n \n\n10.26AB* (16)\n\n \n\n[Thirty-Second Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019039348/csgs-ex1026ab_357.htm)\n\n \n\n \n\n \n\n10.26AC* (16)\n\n \n\n[Thirty-Third Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019039348/csgs-ex1026ac_356.htm)\n\n \n\n \n\n \n\n10.26AD* (16)\n\n \n\n[Thirty-Fourth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459019039348/csgs-ex1026ad_355.htm)\n\n \n\n \n\n \n\n10.26AE* (17)\n\n \n\n[Thirty-Fifth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020005691/csgs-ex1026ae_198.htm)\n\n \n\n \n\n \n\n10.26AF* (18)\n\n \n\n[Thirty-Seventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020022554/csgs-ex1026af_59.htm)\n\n \n\n \n\n \n\n10.26AG* (18)\n\n \n\n[Thirty-Eighth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020022554/csgs-ex1026ag_57.htm)\n\n \n\n \n\n \n\n10.26AH* (19)\n\n \n\n[Twenty-First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020037446/csgs-ex1026ah_55.htm)\n\n \n\n \n\n \n\n10.26AI* (19)\n\n \n\n[Thirty-Ninth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020037446/csgs-ex1026ai_56.htm)\n\n \n\n \n\n \n\n10.26AJ* (19)\n\n \n\n[Fortieth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020037446/csgs-ex1026aj_54.htm)\n\n \n\n \n\n \n\n10.26AK* (21)\n\n \n\n[Forty-First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020051017/csgs-ex1026ak_60.htm)\n\n \n\n \n\n \n\n10.26AL* (21)\n\n \n\n[Forty-Second Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020051017/csgs-ex1026al_59.htm)\n\n \n\n \n\n \n\n10.26AM* (22)\n\n \n\n[Forty-Fifth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021006874/csgs-ex1026am_35.htm)\n\n \n\n \n\n \n\n10.26AN* (22)\n\n \n\n[Forty-Sixth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021006874/csgs-ex1026an_36.htm)\n\n \n\n \n\n \n\n10.26AO* (22)\n\n \n\n[Forty-Seventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021006874/csgs-ex1026ao_33.htm)\n\n \n\n \n\n \n\n10.26AP* (23)\n\n \n\n[Forty-Eighth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021024767/csgs-ex1026ap_109.htm)\n\n \n\n \n\n \n\n10.26AQ* (23)\n\n \n\n[Forty-Ninth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021024767/csgs-ex1026aq_108.htm)\n\n \n\n \n\n \n\n10.26AR* (23)\n\n \n\n[Forty-Ninth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021024767/csgs-ex1026ar_107.htm)\n\n \n\n \n\n \n\n10.26AS* (24)\n\n \n\n[Fifty-First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1026as_106.htm)\n\n \n\n \n\n \n\n10.26AT* (24)\n\n \n\n[Fifty-Second Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1026at_107.htm)\n\n \n\n \n\n \n\n10.26AU* (24)\n\n \n\n[Fifty-Third Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1026au_104.htm)\n\n \n\n \n\n \n\n78\n\n \n\n10.26AV* (25)\n\n \n\n[Fifty-Fifth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021054408/csgs-ex10_xxviav.htm)\n\n \n\n \n\n \n\n10.26AW* (27)\n\n \n\n[Fifty-Seventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_261.htm)\n\n \n\n \n\n \n\n10.26AX* (27)\n\n \n\n[Fifty-Eighth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_262.htm)\n\n \n\n \n\n \n\n10.26AY* (27)\n\n \n\n[Fifty-Ninth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_263.htm)\n\n \n\n \n\n \n\n10.26AZ* (28)\n\n \n\n[Sixty-First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_261.htm)\n\n \n\n \n\n \n\n10.26BA* (28)\n\n \n\n[Sixty-Third Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_262.htm)\n\n \n\n \n\n \n\n10.26BB* (30)\n\n \n\n[Sixty-Fifth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022014653/csgs-ex10_26bb.htm)\n\n \n\n \n\n \n\n10.26BC* (32)\n\n \n\n[Sixty-Fourth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022021696/csgs-ex10_26bc.htm)\n\n \n\n \n\n \n\n10.26BD* (32)\n\n \n\n[Sixty-Seventh Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022021696/csgs-ex10_26bd.htm)\n\n \n\n \n\n \n\n10.26BE* (33)\n\n \n\n[Sixty-Eighth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023003146/csgs-ex10_26be.htm)\n\n \n\n \n\n \n\n10.26BF* (33)\n\n \n\n[Seventieth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023003146/csgs-ex10_26bf.htm)\n\n \n\n \n\n \n\n10.26BG* (33)\n\n \n\n[Seventy-First Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023003146/csgs-ex10_26bg.htm)\n\n \n\n \n\n \n\n10.26BH* (33)\n\n \n\n[Seventy-Second Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023003146/csgs-ex10_26bh.htm)\n\n \n\n \n\n \n\n10.26BI* (33)\n\n \n\n[Seventy-Third Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023003146/csgs-ex10_26bi.htm)\n\n \n\n \n\n \n\n10.26BJ* (35)\n\n \n\n[Sixtieth Amendment to Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023017565/csgs-ex10_26bj.htm)\n\n \n\n \n\n \n\n10.27* (17)\n\n \n\n[CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020005691/csgs-ex1027_251.htm)\n\n \n\n \n\n \n\n10.27A* (17)\n\n \n\n[CD Addendum to CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020005691/csgs-ex1027a_199.htm)\n\n \n\n \n\n \n\n10.27B* (18)\n\n \n\n[First Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459020022554/csgs-ex1027b_58.htm)\n\n \n\n \n\n \n\n10.27C* (22)\n\n \n\n[Second Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021006874/csgs-ex1027c_34.htm)\n\n \n\n \n\n \n\n10.27D* (23)\n\n \n\n[Third Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021024767/csgs-ex1027d_106.htm)\n\n \n\n \n\n \n\n10.27E* (24)\n\n \n\n[Fourth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1027e_105.htm)\n\n \n\n \n\n \n\n10.27F* (24)\n\n \n\n[Fifth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1027f_102.htm)\n\n \n\n \n\n \n\n10.27G* (24)\n\n \n\n[Fifth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1027g_203.htm)\n\n \n\n \n\n \n\n10.27H* (24)\n\n \n\n[Eighth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1027h_101.htm)\n\n79\n\n \n\n \n\n \n\n \n\n10.27I* (25)\n\n \n\n[Seventh Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021054408/csgs-ex10_xxviii.htm)\n\n \n\n \n\n \n\n10.27J* (25)\n\n \n\n[Ninth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459021054408/csgs-ex10_xxviij.htm)\n\n \n\n \n\n \n\n10.27K* (27)\n\n \n\n[Tenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_271.htm)\n\n \n\n \n\n \n\n10.27L* (27)\n\n \n\n[Eleventh Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_272.htm)\n\n \n\n \n\n \n\n10.27M* (27)\n\n \n\n[Twelfth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_273.htm)\n\n \n\n \n\n \n\n10.27N* (27)\n\n \n\n[Thirteenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017022001463/csgs-ex10_274.htm)\n\n \n\n \n\n \n\n10.27O* (28)\n\n \n\n[Fourteenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_271.htm)\n\n \n\n \n\n \n\n10.27P* (28)\n\n \n\n[Fifteenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_272.htm)\n\n \n\n \n\n \n\n10.27Q* (28)\n\n \n\n[Sixteenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_273.htm)\n\n \n\n \n\n \n\n10.27R* (28)\n\n \n\n[Seventeenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_274.htm)\n\n \n\n \n\n \n\n10.27S* (28)\n\n \n\n[Eighteenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_275.htm)\n\n \n\n \n\n \n\n10.27T* (28)\n\n \n\n[Nineteenth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_276.htm)\n\n \n\n \n\n \n\n10.27U* (37)\n\n \n\n[Twentieth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023037789/csgs-ex10_27u.htm)\n\n \n\n \n\n \n\n10.27V* (37)\n\n \n\n[Twenty-First Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023037789/csgs-ex10_27v.htm)\n\n \n\n \n\n \n\n10.27W* (37)\n\n \n\n[Twenty-Second Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023037789/csgs-ex10_27w.htm)\n\n \n\n \n\n \n\n10.27X* (41)\n\n \n\n[Twenty-Third Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024016286/csgs-ex10_27x.htm)\n\n \n\n \n\n \n\n10.27Y* (43)\n\n \n\n[Encompass Addendum to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024093482/csgs-ex10_27y.htm)\n\n \n\n \n\n \n\n10.27Z* (44)\n\n \n\n[First Amendment to Encompass Addendum to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024122869/csgs-ex10_27z.htm)\n\n \n\n \n\n \n\n10.27AA* (46)\n\n \n\n[Twenty-Fourth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017025023962/csgs-ex10_27aa.htm)\n\n \n\n \n\n \n\n10.27AB* (48)\n\n \n\n[Twenty-Fifth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017025104694/csgs-ex10_27ab.htm)\n\n \n\n \n\n \n\n10.27AC* (50)\n\n \n\n[Twenty-Sixth Amendment to the CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Comcast Cable Communications Management, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000119312525269064/csgs-ex10_27ac.htm)\n\n \n\n \n\n \n\n10.28A* (40)\n\n \n\n[Second Amendment to the Amended and Restated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023057853/csgs-ex10_28a.htm)\n\n \n\n \n\n \n\n10.28B* (40)\n\n \n\n[Third Amendment to the Amended and Restated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017023057853/csgs-ex10_28b.htm)\n\n \n\n \n\n \n\n80\n\n \n\n10.28C* (41)\n\n \n\n[Fourth Amendment to the Amended and Restated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024016286/csgs-ex10_28c.htm)\n\n \n\n \n\n \n\n10.28D* (42)\n\n \n\n[Fifth Amendment to the Amended and Restated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024051767/csgs-ex10_28d.htm)\n\n \n\n \n\n \n\n10.28E* (42)\n\n \n\n[Sixth Amendment to the Amended and Restated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024051767/csgs-ex10_28e.htm)\n\n \n\n \n\n \n\n10.28F* (43)\n\n \n\n[Seventh Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017024093482/csgs-ex10_28f.htm)\n\n \n\n \n\n \n\n10.28G* (46)\n\n \n\n[Ninth Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017025023962/csgs-ex10_28g.htm)\n\n \n\n \n\n \n\n10.28H* (47)\n\n \n\n[Eighth Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017025066561/csgs-ex10_28h.htm)\n\n \n\n \n\n \n\n10.28I* (47)\n\n \n\n[Tenth Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000095017025066561/csgs-ex10_28i.htm)\n\n \n\n \n\n \n\n10.28J* (50)\n\n \n\n[Eleventh Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000119312525269064/csgs-ex10_28j.htm)\n\n \n\n \n\n \n\n10.28K* (50)\n\n \n\n[Twelfth Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](https://www.sec.gov/Archives/edgar/data/1005757/000119312525269064/csgs-ex10_28k.htm)\n\n \n\n \n\n \n\n10.28L*\n\n \n\n[Fourteenth Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](csgs-ex10_28l.htm)\n\n \n\n \n\n \n\n10.28M*\n\n \n\n[Fifteenth Amendment to the Consolidated CSG Master Subscriber Management System Agreement between CSG Systems, Inc. and Charter Communications Operating, LLC](csgs-ex10_28m.htm)\n\n \n\n \n\n \n\n10.39 (13)+\n\n \n\n[CSG Systems, Inc. Wealth Accumulation Plan, as restated and amended effective December 6, 2017](https://www.sec.gov/Archives/edgar/data/1005757/000156459018028815/csgs-ex1039_111.htm)\n\n \n\n \n\n \n\n10.39A (13)+\n\n \n\n[Adoption Agreement to CSG Systems, Inc. Wealth Accumulation Plan, executed September 13, 2018](https://www.sec.gov/Archives/edgar/data/1005757/000156459018028815/csgs-ex1039a_110.htm)\n\n \n\n \n\n \n\n10.40 (38)\n\n \n\n[Form of Capped Call Confirmations](https://www.sec.gov/Archives/edgar/data/1005757/000095017023047516/csgs-ex10_40.htm)\n\n \n\n \n\n \n\n10.50 (3)+\n\n[CSG Systems International, Inc. 2001 Stock Incentive Plan](https://www.sec.gov/Archives/edgar/data/1005757/000102140802010915/dex1050.htm)\n\n \n\n \n\n \n\n10.55 (20)+\n\n \n\n[Employment Agreement with Brian A. Shepherd, dated August 26, 2020](https://www.sec.gov/Archives/edgar/data/1005757/000156459020041893/csgs-ex1055_6.htm)\n\n \n\n \n\n \n\n10.56 (24)+\n\n \n\n[Employment Agreement with Elizabeth A. Bauer, dated May 20, 2021](https://www.sec.gov/Archives/edgar/data/1005757/000156459021041434/csgs-ex1056_30.htm)\n\n \n\n \n\n \n\n10.57 (26)+\n\n \n\n[Employment Offer Letter with Hai Tran, dated November 16, 2021](https://www.sec.gov/Archives/edgar/data/1005757/000156459021058666/csgs-ex1057_25.htm)\n\n \n\n \n\n \n\n10.60 (35)+\n\n \n\n[CSG Systems International, Inc. Executive Severance Plan](https://www.sec.gov/Archives/edgar/data/1005757/000095017023017565/csgs-ex10_60.htm)\n\n \n\n \n\n \n\n10.61 (35)+\n\n \n\n[CSG Systems International, Inc. Executive Severance Plan Participation Agreement with Brian A. Shepherd, dated March 28, 2023](https://www.sec.gov/Archives/edgar/data/1005757/000095017023017565/csgs-ex10_61.htm)\n\n \n\n \n\n \n\n10.63 (35)+\n\n \n\n[CSG Systems International, Inc. Executive Severance Plan Participation Agreement with Elizabeth A. Bauer, dated March 28, 2023](https://www.sec.gov/Archives/edgar/data/1005757/000095017023017565/csgs-ex10_63.htm)\n\n \n\n \n\n \n\n10.80 (45)+\n\n \n\n[Performance-Based Restricted Stock Award Agreement with Brian A. Shepherd, dated December 10, 2024](https://www.sec.gov/ix?doc=/Archives/edgar/data/1005757/000095017024135222/csgs-20241206.htm)\n\n \n\n \n\n \n\n10.81 (28)+\n\n \n\n[Forms of Agreement for Equity Compensation](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_81.htm)\n\n \n\n \n\n \n\n10.84 (28)+\n\n \n\n[Forms of Agreement for Equity Compensation](https://www.sec.gov/Archives/edgar/data/1005757/000156459022018177/csgs-ex10_84.htm)\n\n \n\n \n\n \n\n10.85 (42)+\n\n \n\n[Forms of Agreement for Equity Compensation](https://www.sec.gov/Archives/edgar/data/1005757/000095017024051767/csgs-ex10_85.htm)\n\n \n\n \n\n \n\n19.01 (46)\n\n \n\n[CSG Systems International, Inc. Insider Trading Policy](https://www.sec.gov/Archives/edgar/data/1005757/000095017025023962/csgs-ex19_01.htm)\n\n \n\n \n\n \n\n21.01\n\n[Subsidiaries of the Registrant](csgs-ex21_01.htm)\n\n \n\n \n\n23.01\n\n[Consent of KPMG LLP](csgs-ex23_01.htm)\n\n81\n\n \n\n \n\n \n\n31.01\n\n[Certifications Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](csgs-ex31_01.htm)\n\n \n\n \n\n31.02\n\n[Certifications Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](csgs-ex31_02.htm)\n\n \n\n \n\n32.01\n\n[Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](csgs-ex32_01.htm)\n\n \n\n \n\n \n\n97.00 (41)\n\n \n\n[Clawback Policy of CSG Systems International, Inc., as adopted on November 14, 2023](https://www.sec.gov/Archives/edgar/data/1005757/000095017024016286/csgs-ex97_00.htm)\n\n \n\n \n\n \n\n101.INS\n\nInline XBRL Instance Document – the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document\n\n \n\n \n\n101.SCH\n\nInline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents\n\n \n\n \n\n \n\n104\n\n \n\nCover Page Interactive Data File (embedded within the Inline XBRL document)\n\n(1)\nIncorporated by reference to the exhibit of the same number to the Registration Statement No. 333-244 on Form S-1.\n\n(2)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 1997.\n\n(3)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2002.\n\n(4)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated November 16, 2006.\n\n(5)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2007.\n\n(6)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2010.\n\n(7)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2010.\n\n(8)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated May 17, 2011.\n\n(9)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2017.\n\n(10)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2017.\n\n(11)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2018.\n\n(12)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2018.\n\n(13)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2018.\n\n(14)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2019.\n\n(15)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2019.\n\n(16)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2019.\n\n(17)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2019.\n\n(18)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2020.\n\n(19)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2020.\n\n(20)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated August 26, 2020.\n\n(21)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2020.\n\n(22)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2020.\n\n(23)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2021.\n\n(24)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2021.\n\n(25)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2021.\n\n(26)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated November 22, 2021.\n\n(27)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2021.\n\n82\n\n \n\n(28)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2022.\n\n(29)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated May 18, 2022.\n\n(30)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2022.\n\n(31)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated August 17, 2022.\n\n(32)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2022.\n\n(33)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2022.\n\n(34)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated April 12, 2023.\n\n(35)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2023.\n\n(36)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated May 17, 2023.\n\n(37)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2023.\n\n(38)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated September 6, 2023.\n\n(39)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated September 5, 2023.\n\n(40)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2023.\n\n(41)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2023.\n\n(42)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2024.\n\n(43)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2024.\n\n(44)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2024.\n\n(45)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated December 6, 2024.\n\n(46)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2024.\n\n(47)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2025.\n\n(48)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended June 30, 2025.\n\n(49)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Current Report on Form 8-K for the event dated October 29, 2025.\n\n(50)\nIncorporated by reference to the exhibit of the same number to the Registrant’s Quarterly Report on Form 10-Q for the period ended September 30, 2025.\n\n* Portions of the exhibit have been omitted pursuant to an application for confidential treatment, and the omitted portions have been filed separately with the Commission.\n\n** Certain of the schedules (or similar attachments) to this Exhibit have been omitted in accordance with Item 601(a)(5) of Regulation S-K under the Securities Act because they do not contain information material to an investment or voting decision and that information is not otherwise disclosed in the Exhibit or the disclosure document. The registrant hereby agrees to furnish a copy of all omitted schedules (or similar attachments) to the SEC upon its request.\n\n+ Management contract or compensatory plan or arrangement.\n\n83\n\n \n\nPursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.\n\n \n\nCSG SYSTEMS INTERNATIONAL, INC.\n\n \n\nBy:\n\n/s/ BRIAN A. SHEPHERD\n\n \n\nBrian A. Shepherd\n\n \n\n \n\n \n\nPresident and Chief Executive Officer\n\n \n\n \n\n \n\n(Principal Executive Officer)\n\n \n\n \n\n \n\nDate: February 19, 2026\n\nPursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in capacities and on the dates indicated.\n\nSignature\n\n \n\nTitle\n\nDate\n\n \n\n \n\n \n\n \n\n \n\n/s/ MARWAN H. FAWAZ\n\n \n\nChair of the Board of Directors\n\n \n\nFebruary 19, 2026\n\nMarwan H. Fawaz\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ BRIAN A. SHEPHERD\n\n \n\nDirector, President and Chief Executive Officer\n\nFebruary 19, 2026\n\nBrian A. Shepherd\n\n \n\n(Principal Executive Officer)\n\n \n\n \n\n \n\n \n\n \n\n/s/ HAI TRAN\n\n \n\nChief Financial Officer\n\nFebruary 19, 2026\n\nHai Tran\n\n \n\n(Principal Financial Officer)\n\n \n\n \n\n \n\n \n\n \n\n/s/ LORI J. SZWANEK\n\n \n\nChief Accounting Officer\n\nFebruary 19, 2026\n\nLori J. Szwanek\n\n \n\n(Principal Accounting Officer)\n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ RACHEL A. BARGER\n\n \n\nDirector\n\n \n\nFebruary 19, 2026\n\nRachel A. Barger\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ DAVID G. BARNES\n\n \n\nDirector\n\nFebruary 19, 2026\n\nDavid G. Barnes\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ GREGORY A. CONLEY\n\n \n\nDirector\n\n \n\nFebruary 19, 2026\n\nGregory A. Conley\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ SAMANTHA GREENBERG\n\n \n\nDirector\n\n \n\nFebruary 19, 2026\n\nSamantha Greenberg\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ RAJAN NAIK\n\n \n\nDirector\n\nFebruary 19, 2026\n\nRajan Naik\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ HAIYAN SONG\n\n \n\nDirector\n\nFebruary 19, 2026\n\nHaiyan Song\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ SILVIO TAVARES\n\n \n\nDirector\n\nFebruary 19, 2026\n\nSilvio Tavares\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n/s/ TSE LI YANG\n\n \n\nDirector\n\nFebruary 19, 2026\n\nTse Li Yang\n\n \n\n \n\n \n\n \n\n \n\n84"}