Topaz has an annual turnover of €3 billion and processes one million transactions every month. It employs 1,600 people

Emmet O’Neill has been appointed as chief executive of the petrol station chain Topaz Energy.He will replace Sean Corkery who is to step down from the(...)

Dietician Paul Gough set up Nualtra, a company making oral nutritional supplements to treat disease-related malnutrition, in 2012. It now has a mar(...)

Nualtra’s milkshake and dessert-style supplements need a specific aseptic machine to manage their high protein levels and must be packed at a certain temperature so that they have a one-year shelf life.

Medical nutrition company Nualtra has secured a €300,000 investment from Enterprise Ireland to help it move its manufacturing base to Ireland. Launche(...)

Siteserv, a construction services conglomerate assembled during the boom by Niall McFadden, was acquired by Denis O’Brien last year for €45 million

Sierra Support Services, which is owned by Denis O’Brien’s Siteserv group, is closing in on up to $30 million worth of state contracts in Papua New G(...)

Sean Corkery: “We should follow the Digicel map. It is in high growth, weak infrastructure markets . . . If we didn’t have the shareholder we have, it would be harder to go there.” Photograph: Eric Luke

In 1997, Sean Corkery got a call from a headhunter acting on behalf of Denis O’Brien. “I didn’t know Denis from Adam,” he says.Corkery was in charge o(...)