Somchai Lertsutiwong

Somchai Lertsutiwong is the CEO of Advanced Info Service (AIS), Thailand's largest mobile telecommunications operator with over 45 million subscribers. Under his leadership, AIS has maintained its market leadership position while navigating major industry transitions — from 3G to 4G to 5G — and expanding beyond traditional mobile services into fixed broadband, enterprise digital solutions, cloud computing, and cybersecurity services. AIS's ownership structure changed significantly when the Shinawatra family's stake was acquired by Gulf Energy Development, bringing in Singtel as a strategic partner. Somchai has managed this transition while maintaining operational continuity and driving the company's digital transformation strategy. His focus has been on building AIS's enterprise business as a growth engine beyond the maturing consumer mobile market, with particular emphasis on data center expansion and cloud services. His strategic decisions around 5G rollout investment timing, spectrum acquisition strategy, the balance between consumer and enterprise revenue growth, and partnerships in the digital economy ecosystem are the key variables investors monitor. AIS's stock performance is closely tied to Thailand's economic growth, telecom regulatory environment, and the company's ability to grow average revenue per user while defending against competitors DTAC (now merged with True to form True Corporation) and the resulting competitive dynamics in a market that effectively consolidated from three to two major players.