First California Platform Partner marks major west coast expansion for one of the nation’s fastest-growing brokers
MECHANICSBURG, Pa., Sept. 15, 2026 /PRNewswire/ — Keystone, one of the nation’s largest independent insurance brokerages, today announced the acquisition of Infinity Assurance Group (IAG), a full-service independent insurance brokerage headquartered in Orange County, California. The transaction, effective August 3, 2026, represents Keystone’s first Platform Partner in California and marks a significant milestone in the company’s national expansion.
IAG will continue to operate under its current leadership, with John Kookootsedes, Founder and Chairman, and Eric Doll, CEO, continuing at the helm as the agency joins Keystone’s growing network of Platform Partners across the country. IAG’s team, client relationships, and community presence remain fully intact.
Known for its “Trust… but Verify” philosophy and a full-service practice that serves as an extension of the client’s management team, IAG helps manage risk so its clients thrive. IAG’s expertise spans manufacturing, construction, large property, transportation, warehousing, logistics and hospitality risks. IAG’s team are experts in the placement of property, complex liability, high excess liability, management liability, surety, workers’ compensation, high-net-worth personal lines, employee benefits, and captive insurance solutions. IAG has built a broad and dyanamic client base in the west and throughout the country. The addition of IAG extends Keystone’s platform to the west coast for the first time, reinforcing the company’s position as a leading home for high-performing independent agencies.
“IAG is exactly the kind of agency we built Keystone to serve,” said Dan Girardi, Chief Strategy Officer at Keystone. “John, Eric, and their team have built a business on the same principle that sits at the top of our own brand, trust. That discipline comes through in how they serve their clients, and it’s a big reason they’ve been so successful attracting top production talent from across the state. Together, we’re excited to keep building on that in a producer-centric model. Bringing them into the Keystone family isn’t just an expansion into California. It’s a partnership between two organizations that agree on what matters most.”
For IAG, joining Keystone opens access to national resources: expanded carrier relationships, technology, producer development, risk management, and dedicated M&A support. All while preserving the local expertise and client relationships that have defined the agency for years.
“When we started conversations with Keystone, what struck me first wasn’t the resources or the scale. It was the way the team talked about our people, our clients, and our community,” said Eric Doll, CEO of IAG. “They understood that day two would look like day one, and that having a national platform behind everything we do is what changes what’s possible for us.”
“For us, this partnership was never just about growth for growth’s sake,” said John Kookootsedes, Chairman of IAG. “It was about finding a platform that respects what we’ve built and gives our team even more room to do right by our clients. Keystone shares that same commitment, and that made this an easy decision.”
The IAG acquisition comes during a year of significant momentum for Keystone. Insurance Journal recently named Keystone the 17th largest retail broker in the United States, and one of the fastest-growing brokers among the Top 50, a recognition of the company’s continued expansion through both organic growth and strategic partnerships.
Keystone’s growth trajectory reflects a broader strategy within the independent insurance agency market. The company’s dual model, a national platform for acquired agencies alongside a robust independent Network, positions Keystone uniquely in the industry. Dowling Hales acted as exclusive financial advisor to Infinity Assurance Group in its sale to Keystone.
About Keystone
Keystone is recognized by Insurance Journal as the 17th largest P&C broker in the United States. Founded in 2020, Keystone empowers independent agencies through strategic partnerships, best-in-class services, and capital investments. For more information, visit www.mykeystone.com
Media Contact:
Stuart Kail
VP of Marketing, Keystone
stuart.kail@mykeystone.com
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SOURCE Keystone Agency Partners
