X0206 3/A 2024-02-13 2024-02-21 0 0001005757 CSG SYSTEMS INTERNATIONAL INC CSGS 0002012698 Woods Michael Joseph 169 INVERNESS DR. W, SUITE 300 ENGLEWOOD CO 80112 1 EVP Pres NA Comm, Media & Tech Common Stock 16255.8745 D This Form 3 amendment is being filed to correct the original Form 3 filed on February 21, 2024, from 4,755.8745 shares to 16,255.8745 shares beneficially owned, which represents 11,500 unvested time-based and performance-based restricted stock awards. /s/ Stacey Langley, attorney-in-fact for Michael J. Woods 2024-05-07