Osborne, McLaren and Engie Regeneration have scored spots on all three of the highest value lots on a £5bn framework covering public sector jobs across London.
Kier, Durkan, Mace and Morgan Sindall each secured places on two of the three £20m-plus lots.
The London Construction Programme framework is being run by Haringey council on behalf of all 33 London boroughs.
The five-lot framework covers housing and residential, education and leisure, capital projects, heritage and historical and highways and public realm.
The housing, education and capital project lots have each been divided into sublots based on geographical region and value.
Lots four and five, which cover heritage and highways jobs respectively, are single lots covering projects worth more than £1m
The big winners
Housing and residential - Lot 1.4 - Pan London £20m+
Education and leisure - Lot 2.4 - Pan London £20m+
McLaughlin & Harvey
Capital projects - Lot 3.4 - Pan London £20m+
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