Laing O’Rourke was founded in 1978 by its chief executive, Ray O’Rourke, 71. Its flagship projects include London’s “cheesegrater” tower, one of the tallest in the City, and Heathrow Terminal 5. In 2017, following a strategic review, the Dartford company staged a turnaround, with losses of £18m turned into profits of £78m, and reported an increase in its UK order book. In March, its Australian division won a £540m contract to upgrade Sydney Central train station.

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Company details
Year2018
Rank14
CompanyLaing O’Rourke
ActivityEngineering and construction group
LocationDartford
Sales £m2,935
Profit £m78
Year endMar 17
Principal shareholdersRay O’Rourke and Des O’Rourke through Suffolk Partners Corporation (100%)
Staff15,273
Founded1978
Websitewww.laingorourke.com

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* Supplied by company † Annualised figure