Clearlake Capital Group, L.P. and Silver Lake Management, L.L.C. have expressed interest in a possible takeover of ACI Worldwide, two sources familiar with the matter tell Deal reporter's Ryan Gould and Diane Alter, according to contacts. Bloomberg's Matthew Monks previously reported on January 4, 2023 that ACI Worldwide, Inc. (NasdaqGS:ACIW) is working with financial advisers as it fields takeover interest from private equity suitors.