Bank Pembangunan Islam IDB menyuntikkan modal pada 1999 kemudian menjadi pemegang saham terbesar yaitu 28,01 persen per akhir 2007.
The Islamic Development Bank IDB injected capital in 1999 after Muamalat ran into financial difficulties during the Asian financial crisis and became the largest shareholder with a 28.01% stake at the end of 2007.