AIB has changed its American Depository Share (ADS) ratio from six to two. This will mean that at the close of business on May 13th next stock holders will receive two additional ADSs for every one held. New ADSs will be issued by the AIB's depository bank, Bank of New York, on the payable date which is May 14th. This will increase the number of ADSs outstanding from 22 million to 66 million.