The Grant Thornton CBIZ deal, announced on 29 July 2026, will hand shareholders of the New York-listed management consultancy $55 per share in cash, a 54 per cent premium to the company’s 30-day average share price. The transaction, expected to close in the fourth quarter of 2026, would create the fifth-largest professional services, tax, and advisory firm in the US.
The merger agreement was signed on 28 July 2026 and is structured as a three-party arrangement among CBIZ, Viking ParentCo, Inc. and Viking MergerCo, Inc., a wholly owned subsidiary of Viking ParentCo, according to CBIZ’s 8-K filing with the Securities and Exchange Commission (SEC). Viking MergerCo will merge into CBIZ, which will cease to be publicly traded upon closing.
CBIZ’s share price fell nearly 40 per cent over the prior year, hitting a low of $24.29 in April. At $55 per share, the offer represents a substantial recovery for investors who held through that decline.
Go-shop period and shareholder protections in the Grant Thornton CBIZ deal
The merger agreement includes a go-shop provision, permitting CBIZ and its advisers to solicit and negotiate rival bids until 11:59 p.m. Eastern Time on 27 August 2026, according to CBIZ’s investor relations filing. Prior to the shareholder vote, the CBIZ board retains the right to terminate the agreement in favour of a superior proposal, subject to payment of a termination fee.
Concurrently, Grant Thornton Advisors LLC entered into a limited guarantee with CBIZ covering the parent termination fee and certain reimbursement obligations that may be owed by Viking ParentCo, the 8-K filing discloses.
The combined entity would generate nearly $7.5bn in revenue and operate across more than 20 countries, propelling Grant Thornton past mid-market rivals including RSM and BDO in the US rankings.
New Mountain Capital and the insurance spinoff
Private equity firm New Mountain Capital, which has approximately $60bn in assets under management according to PLANADVISER, first invested in Grant Thornton Advisors in May 2024 to fund the firm’s growth strategy. It is now contributing incremental equity to support the CBIZ acquisition, per the joint press release filed with the SEC.
Bob Mulcare and Sean Donovan, managing directors at New Mountain Capital, are leading the transaction. Andre Moura, a further managing director at the firm, has been involved with Grant Thornton Advisors’ strategic growth plan since the May 2024 investment, according to the Grant Thornton Advisors press release.
As part of the deal, CBIZ’s Benefits and Insurance Services segment will be separated into a standalone company, also backed by New Mountain Capital. Mulcare and Donovan described the planned entity as ‘a new leading firm dedicated to insurance, retirement and payroll services,’ per the joint SEC filing.
The separation is driven by audit independence rules: operating an insurance brokerage within the same entity as an audit practice creates regulatory conflicts, according to Insurance Business Magazine. Carving out the benefits and insurance business removes that conflict.
Jim Peko, chief executive of Grant Thornton Advisors, said the firm was ‘broadening our ability to support businesses through every stage of growth, from early development to global scale.’ Jerry Grisko, president and chief executive of CBIZ, said the combination would create ‘a stronger firm with new and exciting opportunities for our team members and enhanced service offerings for clients, while delivering significant value to CBIZ shareholders.’
CBIZ is currently the only audit firm listed on a US stock exchange. Under a change-in-control severance plan adopted alongside the merger agreement on 28 July 2026, eligible staff face qualifying terminations covered by cash severance ranging from 0.5 times to 3 times annual compensation, with health-coverage payments for between 6 and 36 months.
The deal sits within a broader shift in the accountancy sector. Grant Thornton’s UK arm was separately acquired by private equity firm Cinven, becoming the largest UK professional services business to accept external equity investment; the firm’s UK equity partners received a £35.2m payout following that transaction.
CBIZ shareholders will vote on the merger before the go-shop window closes on 27 August 2026, with deal completion targeted for the fourth quarter of 2026. Any superior proposal received before that vote could still alter the outcome.
