Who are the top businessmen backing TDs?
Wicklow resident Paul McGuinness had a successful career as a music mogul spanning decades. He announced his retirement as U2's manager in 2013
Michael Chadwick - whose wealth has been estimated at some €208m - ran building supplies firm Chadwicks. His retirement as as non-executive chairman of the Grafton Group was announced earlier this year.
Billionaire businessman Dermot Desmond previously donated to 2011 presidential candidates Mary Davis and Senator David Norris.
Declan Kelly - the brother of Labour TD Alan Kelly - has made a number of donations to him over the years. He is the chief executive of US advisory firm Teneo and previously served as economic envoy to Northern Ireland under US Secretary of State Hillary Clinton.