Abu Dhabi Islamic Bank (ADIB) is in preliminary talks to purchase a 15% stake worth about USD1.1bn in Indonesia’s leading Islamic lender, Bank Syariah Indonesia (BSI). The deal, part of ADIB’s strategy to expand into Southeast Asia’s booming Islamic finance market, is not yet finalised and remains under discussion. Indonesia, with one of the largest Muslim populations globally, represents a significant growth opportunity in this sector. BSI, established by merging three banks in 2021, aims to be among the world’s top 10 Islamic banks. If successful, this acquisition would mark one of the most substantial banking transactions in Southeast Asia in recent years.