CEO of Top Irish Securities Firm Davy Resigns After Scandal Mar 08 2021, 12:13 PM March 06 2021, 6:45 PM March 08 2021, 12:13 PM (Bloomberg) -- Brian McKiernan, chief executive of Irelandâs biggest securities firm Davy, resigned after regulators accused the company of a âlack of candorâ in dealing with one of the worst scandals to hit Dublinâs stockbroking community in years. (Bloomberg) -- Brian McKiernan, chief executive of Irelandâs biggest securities firm Davy, resigned after regulators accused the company of a âlack of candorâ in dealing with one of the worst scandals to hit Dublinâs stockbroking community in years. The board has also accepted the resignations of Kyran McLaughlin as a non-executive deputy chairman and Barry Nangle as head of bonds, the Dublin-based firm said in a statement Saturday. Bernard Byrne, deputy CEO, has been appointed interim chief executive.