Stephen FoleyJul 30, 2026 – 2.29pmNew York | Grant Thornton is buying rival US accounting firm CBIZ for $US5 billion ($7.2 billion) in cash in the largest takeover in the accounting sector in a generation, vaulting it to become the biggest audit and consulting firm in the US outside the big four.The deal, announced on Wednesday (Tuesday AEST), will create a combined group with more than $5 billion in US revenue and underscores how private equity has sparked rapid consolidation in the mid-market accounting sector.Financial TimesSubscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles