Can you correct me?

The bank is one of the fastest growing and most efficient commercial financial institutions. Activity of the bank is lending to legal entities and individuals, cash management services, foreign exchange operations, as well as operations on deposits.
The Bank is among the three largest banks in Belarus in terms of consumer lending. It is the double winner of the national contest "Brand of the Year" in the nominations for "Socially Responsible Brand" and the owner of the title of "Brand 2012 leader in social networks 2012", in 2011, it received the status of "Best Taxpayer of Belarus." Since 2006 it is the first bank-participant of the UN Global Compact in Belarus

Before you use "the bank" you should give some indication of which bank.

(I am assuming you do not have a bank called "The Bank"!)

The first sentence is ok, because you are comparing any bank with other types of institution.

When you refer to awards, you need to be more specific, since those awards would not be given to every bank.