MGA chief executive resigns following internal probe

Stuart Rouse has stepped down as group chief executive at Nexus Underwriting, with Brown and Brown confirming his departure is effective immediately.

In a statement shared with Insurance Times, a spokesperson for Brown and Brown said: “Stuart Rouse has resigned as group chief executive officer and leaves the company with immediate effect. We want to thank Stuart for his contribution to the business over many years and wish him well.

“We will continue to build our business based on values which embrace ambition, excellence and collaboration and we reaffirm our commitment to an inclusive workplace in which every individual is respected.”

Rouse was appointed chief executive at Nexus in 2024, having first joined the business in 2014 as chief operating officer and chief financial officer.

’Inappropriate and offensive’

The development followed Nexus’s confirmation in July 2025 that it had launched an internal investigation into an all-staff email that was described by the managing general agent as “wholly inappropriate and offensive”. At the time, the firm issued an apology and said it was “treating this with urgency”.

Brown and Brown completed its acquisition of Nexus in October 2023. The MGA writes more than £400m in gross written premium annually across multiple lines – including trade credit, financial lines and aviation – through a broker network spanning nine countries.

Since the email incident, there has also been another departure from Nexus. Former transactional risks director Richard Mills has also left for Amiga Specialty, joining the former US chief executive at Nexus Underwriting, Adam Kembrooke’s international MGA.