The Terenure-based Turley brothers Greg (54), Mark (49) and Niall (47) built up the Argus car hire business before realising that there was a huge gap in the market to provide the technology for the entire industry. They exited their Cartrawler business for €110m in 2011 but held on to a 25pc stake. When the company was sold by its private equity owners for €400m, two years ago, there was another bumper cheque. There was debt to be cleared.
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