This document analyzes key performance metrics of major telecommunication companies in Indonesia for the year 2013. It finds that Telkomsel had the highest growth of 10.09% and was the dominant player in terms of subscribers, infrastructure, and profit. XL Axiata grew subscribers significantly through an acquisition but saw declines in EBITDA and profit. Indosat faced challenges from exchange rate fluctuations that led to a large profit loss. Overall Telkomsel maintained its leadership while the other two companies struggled in 2013.