Keystone Enters California Market with Acquisition of Infinity Assurance Group

Keystone, one of the largest independent insurance brokerages in the United States, has announced its acquisition of Infinity Assurance Group (IAG), a full-service independent insurance brokerage based in Orange County, California. The transaction, which took effect on August 3, 2026, marks Keystone's inaugural expansion into the California market, further solidifying its national growth strategy. While the financial details of the deal remain undisclosed, the acquisition is expected to enhance Keystone's network of Platform Partners across the country.

Infinity Assurance Group, founded by John Kookootsedes and led by CEO Eric Doll, has established a strong presence in the insurance sector, specializing in risk management across various industries, including manufacturing, construction, and logistics. IAG's operational model emphasizes a "Trust... but Verify" philosophy, which has resonated well with its diverse clientele. The agency's expertise in complex liability, high-net-worth personal lines, and employee benefits positions it as a valuable addition to Keystone's portfolio, enabling both firms to leverage their strengths in service delivery.

The strategic rationale behind the acquisition lies in Keystone's ambition to broaden its geographic footprint and enhance its service offerings. By integrating IAG into its operations, Keystone gains access to a wealth of local expertise and established client relationships in California, a critical market for independent insurance brokerages. The partnership is designed to preserve IAG's leadership and operational autonomy, ensuring continuity for its clients while also providing access to Keystone's extensive resources, including expanded carrier relationships and advanced technology solutions.

This acquisition comes at a time of significant growth for Keystone, which has recently been recognized as the 17th largest retail broker in the United States by Insurance Journal. The company’s dual model—combining a national platform for acquired agencies with a robust independent network—positions it uniquely within the competitive landscape of the insurance industry. This strategic approach not only facilitates organic growth but also enhances the potential for further acquisitions, as demonstrated by the addition of IAG.

The broader implications of this transaction reflect an ongoing trend in the insurance sector, where independent brokerages are increasingly seeking partnerships to scale operations and enhance service capabilities. As the market continues to evolve, Keystone's expansion into California through the IAG acquisition illustrates a commitment to building a comprehensive national presence while maintaining the local expertise that clients value. The partnership is expected to drive further growth opportunities for both Keystone and IAG, reinforcing their positions in an increasingly competitive market.