Corey Lewis (pictured) spent years at Aon building one of the most recognized tax transactional practices in North America. Now, Brown & Brown is betting he can do it again.
The firm has appointed Lewis as retail global head of tax insurance, a newly created role within its private equity and M&A services practice. He will report to Neil Krauter and lead the expansion of Brown & Brown’s transactional tax capabilities globally.
Lewis served as managing director and member of the North America Transaction Solutions Operating Committee at Aon. He is also a frequent speaker at conferences focused on tax insurance and transaction trends.
The appointment lands at a moment of significant growth in the transactional risk insurance market. Lewis will build and lead a team focused on mergers and acquisitions, tax exposures, evolving transaction structures, and the tax credit market.
Neil Krauter, senior leader within Brown & Brown’s private equity and M&A services practice, said the hire was a direct response to rising client demand.
“Corey brings deep specialization, entrepreneurial leadership, and a strong track record of building market-leading solutions that deliver meaningful value to customers,” Krauter said.
He added that the pace of change in deal structures made the appointment timely. “As transaction structures continue to evolve and customers face increasing complexity, Corey’s experience and market insight will further strengthen our ability to provide innovative, specialized solutions while accelerating our long-term growth strategy.”
Lewis said he was drawn to the firm’s culture and the scale of the opportunity ahead.
“I am excited to join an organization with such a strong culture and entrepreneurial mindset, and I look forward to building a differentiated tax transactional platform that supports customers around the world,” he said.
The numbers behind that complexity are striking. Marsh placed $91.6 billion in transactional risk insurance limits globally in 2025, a 34% increase from 2024. This covered more than 3,800 policies across nearly 1,800 unique transactions.
Tax insurance policies placed by Marsh in North America rose 82% over the same period. Global M&A deal values reached nearly $5 trillion. Mega deals exceeding $10 billion numbered 70, an 81% jump year on year.
The claims side of the market is keeping pace with that volume. Aon’s 2026 Global M&A and Transaction Solutions Claims Study found North American clients secured more than $1 billion across transaction solutions policies in 2025.
This included more than $440 million from R&W insurance alone. Median R&W claim payments reached $8.2 million, up from $5.5 million in 2024. Eight-figure claims made up 41% of North American payments, up from 27% a year earlier.
The global dimension of this ambition has support from market data. Approximately 25 specialist tax insurers now operate in the UK and Europe, more than double the 11 reported five years ago. R&W submissions rose 5% year on year in 2025. Geographic appetite is expanding into markets, including South Korea, the Middle East, Peru, and Colombia.
