Four Western Australian businesses have been ranked in the top five nationally in Co-operatives Australia's top 100 list.
Grains handler CBH Group was ranked number one for the second consecutive year, while insurers HBF, Capricorn Society and RAC WA also made the top five.
The co-operatives were ranked on based on total group revenue including marketing pool revenues.
Acting CBH Group Chief Executive Officer, David Moroney said retaining the position as Australia's top co-operative, with total revenue of $2.63 billion, was a significant achievement.
"It is especially satisfying following the major review of our structure we completed last year which confirmed we should remain a co-operative," Mr Moroney said.
"Our investigation, and the latest top 100 list, reinforce that co-operatives can be just as successful as corporate entities, and in some sectors can do better, provided they adapt to their changing environment and the changing needs of their members."
