Cerillion is a UK-listed enterprise software company (AIM: CER) providing BSS/OSS solutions for telecommunications, finance, and utilities sectors. Their platform enables digital transformation, subscription billing, revenue management, and CRM for network operators and service providers across 60+ countries. Founded in 1999 as a spin-off from Logica, Cerillion has grown to serve major telecoms including EE (BT Group) and several global tier-1 operators.