US-based insurer Arthur J. Gallagher has acquired UK-based pension administrator First Actuarial for an undisclosed sum.  

First Actuarial works with employers and pension plan trustees across the UK, delivering pension administration, consultancy employee benefits and investment services.  

The First Actuarial team is led by David Joy and will continue to work from its existing locations.  

It will operate under the guidance of Arthur UK Benefits and HR Consulting Division head David Piltz. 

Arthur J. Gallagher CEO and chairman J Patrick Gallagher said: “First Actuarial is a highly regarded firm that expands our pension service capabilities in the UK and complements our employee benefits consulting operations. 

“I am very pleased to welcome David and his associates to our growing, global team.” 

In November 2025 , Arthur J. Gallagher acquired Tompkins Insurance Agencies (TIA), the insurance subsidiary of Tompkins Financial, for around $223m in cash.  

TIA supplies property and casualty (P&C) insurance and employee benefits services in Pennsylvania and New York, US.  

Following completion of that transaction, all TIA leadership and staff have moved to Gallagher. 

In August, Arthur J. Gallagher completed its purchase of AssuredPartners for a gross consideration of $13.45bn.  

AssuredPartners, an insurance broker based in the US, offers commercial P&C, specialty, employee benefits and personal lines services.  

Arthur J. Gallagher is a global insurance brokerage, risk management and consulting services company headquartered in Rolling Meadows, Illinois. 

The company delivers these services in around 130 countries through a mix of owned operations and a network of correspondent brokers and consultants, serving clients in multiple industries and geographies.