The Scottish contractor secured a profit margin of 13.3% last year, clearly ahead of Barr on 10.6% and Bechtel with 10.1%.
Also showing strong profitability last year were Thomas Armstrong, with a margin of 8.2%, and Mulalley at 8%.
The least profitable was Vinci UK, whose losses equated to a -21.3% margin. Other heavy loss-makers included Sir Robert McAlpine, with a -6.4% margin, and Balfour Beatty, at -3.5%.
In a separate analysis of overall corporate health, analysing a wider range of financial metrics, Thomas Armstrong and Robertson Group again come out on top.
Thomas Armstrong was also Britain’s most financially healthy building company in our 2014 Company Watch rankings. This year its financial health score has gone up from 91 to 93, out of a maximum 100.
It is a remarkable turnaround for Robertson Group, which scored just 6 last year but this year is in equal second place (along with Mabey) with a score of 85.
For further details, see the September 2015 issue of The Construction Index magazine, out next week.