Vertical Theme Sdn. Bhd. is planning to seek approval in the coming weeks to start talks about selling its stake in Alliance Bank Malaysia Berhad (KLSE:ABMB), according to people familiar with the development. Vertical Theme, a Malaysian holding company, is considering selling its roughly 29% stake in Alliance Bank to Singapore?s biggest lender, DBS Group Holdings Ltd. (SGX:D05), the people said, asking not to be identified because the deliberations are private.