Don't they have enough? They already have their own Chairman at Sampath; I think with their holding of around 15% of Sampath shares.
Isn't there a limit to a single entity(including acting in concert)'s ownership of a bank, especially Sampath? Have they changed the articles of Sampath? Or the regulations of the Central Bank? I remember quite some time ago HNB and others tried to take control of Sampath but the move was averted using the regulations.