In a high-stakes legal battle that underscores the volatile nature of the commercial insurance brokerage industry, Willis Towers Watson (WTW) has launched a sweeping lawsuit against its rival, Lockton. The litigation, filed in the Suffolk County Superior Court in Massachusetts on August 24, stems from a dramatic corporate shake-up in which 18 members of WTW’s specialized construction practice resigned in a synchronized 44-minute window to join the competitor.
The fallout from this mass exodus—which WTW characterizes as a coordinated "raid"—has sent shockwaves through the construction insurance sector. At the heart of the dispute is the immediate migration of at least 13 major client accounts, a move that WTW alleges was the result of unlawful solicitation and breach of contractual obligations. As WTW seeks an emergency temporary restraining order (TRO) and a preliminary injunction, the case highlights the fragile relationship between talent mobility, non-compete agreements, and the stability of client services in the high-stakes world of risk management.
The Chronology of the Exodus: A 44-Minute Blitz
The events of August 19, 2026, were executed with military-like precision, according to court documents filed by WTW. The sequence began at 8:02 a.m., when Michael Scott, a prominent senior leader within WTW’s New England construction practice, submitted his resignation, effective immediately.
What followed was a rapid-fire cascade of departures. Within 44 minutes, 17 other employees had followed suit, resigning their positions in a coordinated fashion. Among the departing cohort was Thomas Grandmaison, WTW’s chief client officer for construction and a well-known industry figure. The group, while primarily based in Boston, included personnel from offices in Alabama and Pennsylvania, suggesting a wide-reaching and highly organized effort to hollow out WTW’s regional construction team.
By the end of that same day, WTW alleges that the groundwork for a massive client migration had already been laid. The firm claims it began receiving broker-of-record letters—legal documents that authorize a new broker to represent a client’s interests—dated August 19. By August 21, the company had been notified of 13 separate accounts that had officially designated Lockton as their new broker of record.
Financial Impact and Allegations of Misconduct
The financial stakes of this departure are significant. WTW reports that the 13 departed accounts represent approximately $5 million in annual revenue. While this figure constitutes roughly 0.3% of the $1.55 billion in revenue generated by WTW’s North American Risk & Broking business in 2025, the firm argues that the loss is not merely about the numbers; it is about the violation of fundamental corporate governance and employment law.
WTW’s complaint is multifaceted. The firm alleges that the departing brokers, particularly Scott and Grandmaison, breached their fiduciary duties to WTW by facilitating the mass exit while still employed. Furthermore, WTW contends that Lockton actively induced these breaches, interfering with existing employment agreements that included 15-day notice requirements and restrictive covenants—specifically non-solicitation and non-servicing clauses spanning 12 to 24 months.
In its filing, WTW provides evidence of what it describes as premeditated poaching. The complaint alleges that Scott had previously disclosed details of an aggressive compensation package offered by Lockton—which included a 25% salary increase, a $500,000 annual bonus guaranteed for five years, and additional production incentives—to WTW leadership while simultaneously negotiating his team’s retention. WTW argues that this evidence demonstrates a bad-faith effort to leverage firm resources while secretly preparing to defect.
The Legal Strategy: Seeking Restitution and Restraint
WTW’s legal team is pushing for a robust remedy. The firm has asked the Suffolk County Superior Court to issue a temporary restraining order and a preliminary injunction that would, if granted, effectively freeze the status quo.
"In other words, the clients Lockton stole should be told that they need to go back to WTW or to another competitor," the filing argues. "Lockton should not be allowed to profit from its unlawful conduct."
The goal of the injunction is twofold: to stop further solicitation of WTW’s remaining clients and to prevent Lockton from servicing the accounts that have already been transferred. By seeking to invalidate the recent transfer of these accounts, WTW is attempting to force a "reset" on the relationships, essentially arguing that the business should remain with its original broker until the legal issues regarding the departures are fully adjudicated.
A History of Industry Turbulence
This is not the first time the insurance brokerage world has seen such high-profile litigation. The industry, known for its reliance on "book of business" loyalty, frequently sees massive team shifts that end up in court.
The most notable precedent cited in the current discourse occurred in 2011, when two senior Aon construction insurance executives left for Alliant, taking approximately 100 accounts—worth roughly $20 million in annual revenue—with them. That case resulted in protracted litigation that drew in major industry players such as Turner Construction and Tutor Perini.
Interestingly, the current defendants in the WTW case, Scott and Grandmaison, are no strangers to these dynamics. They were part of a high-profile move in 2022, when they defected from Aon to join WTW as part of a 10-person team. This history creates a complex narrative: the same brokers now accused of "raiding" were themselves the product of a similar industry maneuver just four years ago.
Furthermore, WTW’s own filing references a 2019 legal battle involving Lockton itself. In that instance, Lockton found itself on the other side of the fence, seeking court protection after 26 employees left its Denver office for a competitor. In that case, Lockton successfully argued for restrictions similar to those it is now fighting, including the prevention of a competitor from retaining client business following a mass departure. The irony of this reversal has not been lost on industry observers.
Broader Implications for the Construction Sector
The dispute carries significant weight for the contractors and owners caught in the middle. Construction insurance is a highly specialized field, requiring deep technical knowledge of project risks, surety bonds, and complex regulatory landscapes. When an entire team moves, clients are often left with a difficult choice: stick with the firm they know, or follow the specific brokers who have historically managed their project risks.
For the contractors involved in this dispute, the uncertainty could lead to temporary coverage gaps or administrative hurdles during the critical transition period. The court’s decision on the injunction will be closely watched, as it will signal whether the legal system is willing to prioritize the enforcement of restrictive covenants over the right of clients to choose their own representatives.
Official Stances and Pending Adjudication
As of late August, both companies have maintained a disciplined public posture. Lockton, through its representatives, has declined to comment on the pending litigation. Similarly, WTW has opted not to expand on its public court filings, focusing its messaging on the legal arguments presented in Suffolk County.
The court has yet to issue a ruling on the emergency request for relief. Legal analysts suggest that the judge will need to balance the potential for irreparable harm to WTW’s business against the potential restraint on the professional livelihoods of the 18 former employees.
Conclusion: The Future of Broker Loyalty
The WTW-Lockton dispute serves as a stark reminder of the "human capital" focus of the insurance brokerage industry. Unlike manufacturing or retail, the primary asset of an insurance firm is its relationships—relationships that are held, managed, and cultivated by individual brokers.
As the construction sector continues to face its own set of challenges, including project delays and evolving risk profiles, the stability of these brokerage teams becomes even more critical. Whether this case concludes in a settlement or a landmark court ruling, it will undoubtedly influence how firms like WTW and Lockton structure their employment agreements and talent retention strategies in the years to come. For now, the industry waits to see if the court will enforce the "no-poach" spirit of these contracts, or if the tradition of the "broker migration" will continue to disrupt the competitive landscape.
