WHO WE ARE
ATS Underwriting Services, headquartered in Beverly, Massachusetts, is a Managing General Underwriter specializing in employer stop-loss solutions.
Led by Andrew Trupiano and Christopher Branch, ATS combines deep industry expertise with a service-first approach to underwriting. Andrew, former SVP of Stop Loss Underwriting at Liberty Ironshore, began his career at TRU Services, where he developed a strong foundation in the MGU model and a commitment to serving policyholders with flexibility, precision, and care.
Chairman Christopher Branch previously led the A&H division at Beazley following the sale of Momentum Underwriting Management (MUM)—an A&H MGA he founded. Earlier in his career, he built the European operations for Cigna A&H, which were later acquired by ACE (Chubb).
ATS is privately owned by its management team and Avoca Insurance Holdings (AIH), an independent firm that invests in and builds specialty insurance underwriting companies across the United States.
Built on a foundation of experience, integrity, and service, ATS is supported by robust infrastructure and highly rated (AM Best A) capacity, delivering reliable, specialized solutions backed by deep sector expertise.
WHAT WE DO
With an exclusive focus on Specific and Aggregate Stop Loss coverage and backed by a network of leading carriers, ATS delivers competitive pricing and comprehensive administrative support to self-insured client groups ranging in size from tens to thousands of employees.
ATS also supports the Captive underwriting model, partnering with Captive Managers to create tailored underwriting strategies and techniques designed to achieve success in any market environment.
At ATS, we’re committed to building strong, lasting relationships with our trusted producer network. We believe this starts with exceptional service and products that help our partners grow their business.
Our ATS Advantage is built around three core pillars:
GROW. RETAIN. PROTECT.
GROW
Grow with our direct-to-market underwriting team. We partner with producers to target the right accounts, stay competitive, and improve Quote-to-Bind metrics — no wasted time, just smarter strategy.
PROTECT
We help lower your clients’ self-funded plan costs by reducing claims spend through targeted cost-management programs. Strong results create pricing flexibility, better renewals, and long-term relationships built on ease of doing business.
RETAIN
Higher renewal retention means stronger, higher-quality earnings for our producers, ATS, and our carrier partners. By reducing insurance costs and keeping customers satisfied, we aim for renewal retention above 90% to support healthier margins and long-term success.
OUR MISSION
ATS Underwriting is an independent stop-loss MGU providing disciplined, data-driven solutions through consultative underwriting, transparent risk management, and operational excellence. We partner for the long term with brokers, captives, and health plan stakeholders, built on trust, accountability, and consistency, bringing clarity to an increasingly complex self-funded market while protecting employers and enabling sustainable growth
OUR PARTNERS
ATS is proud to be supported by leading insurance carriers in the Stop Loss market, as well as by trusted and effective claim adjusting and mitigation firms. Our operating platform is supported by best in industry technology and business infrastructure.
