Gallagher Sues Two Former Brokers Who Started Their Own Firm

By Andrew G. Simpson

Global insurance broker Arthur J. Gallagher is suing two former employees who left to start their own New York brokerage firm for allegedly soliciting Gallagher clients and using confidential information in violation of their employment agreements.

Gallagher claims that James Baranello and Joseph Siringo have violated agreements to not solicit or accept business from the customers they serviced at Gallagher for two years after leaving the firm and that they also agreed not to use or disclose Gallagher confidential information for their own use or the use of another.

According to a complaint filed in federal court in New York, Baranello and Siringo joined Gallagher in 2021 and worked as a team on many accounts. They both resigned without 30-day notice in May 2025 and launched Cornerstone Risk Advisors in New York, according to the lawsuit.

Gallagher claims that before resigning the two solicited a very large unnamed client they serviced while at Gallagher–a client representing 70% of the total book of business they were responsible for at the firm. That client then moved its business to Cornerstone. Gallagher claims the two have since also diverted other clients including a plumbing company, an electric company, and a construction contracting firm that account for more than $50,000 in recurring revenue to Gallagher.

Gallagher maintains that Cornerstone and the two founders continue to violate the nonsolicitation and confidentiality agreements.

Gallagher says that its employees have the right to resign and work for a competitor or form their own brokerage. However, “there is a right way to resign, and a wrong way,” Gallagher asserts while maintaining that its post-employment restrictions are reasonable.

Gallagher is seeking damages and temporary and permanent injunctive relief against Cornerstone and the former employees from further breaches of the contractual agreements.

Topics Lawsuits Agencies A.J. Gallagher