Fourfront, Loop, Coriolis, ThirdWay and Oakley have agreed to pay £7m in fines after admitting their involvement in a cartel.
A Competition and Markets Authority investigation has revealed that each company admitted to breaking competition law at least once during the period of 2006-2017, in some cases on several occasions.
JLL brought information about the conduct to the CMA’s attention and in accordance with the CMA’s Leniency Programme, will therefore not receive a fine.
The companies admitted to participating in ‘cover bidding’ and colluding on prices that they would bid for on contracts.
These cover bids affected 14 contracts across a number of customers including a City law firm and education college.
Chief executive at CMA, Andrea Coscelli said: “The CMA is concerned it is seeing a lot of evidence of anti-competitive conduct in the construction industry, and we have already taken a number of cases in this sector. Today’s fines reinforce the message that the CMA will not tolerate competition law being broken.”