Assurex Global has elected The Miller Group, a Kansas City-based commercial insurance and risk advisory firm, as its newest Partner Firm. Founded in 1961 by Bob Miller and now in its third generation of family leadership under CEO Amber Miller Manning, who took over in 2023, the firm has expanded from its original construction-sector commercial insurance and surety focus into employee benefits and broader risk advisory work.
The addition continues a run of expansion at Assurex that has been deliberate and geographically diverse. In 2025 alone the network added Vista Insurance Brokers in June and UK-based James Hallam in December. This year it has brought in Ireland's Hastings Insurance in February, Nebraska's UNICO Group in March, Czech brokerage OK HOLDING in April, and now The Miller Group - a sequence that spans five countries in under twelve months. In May, Assurex also hired Troy Johnson as SVP of global growth strategy, a hire that sits more naturally alongside a planned expansion programme than an opportunistic one.
Firms that join the Assurex Global partnership remain independently owned and locally led. They gain access to roughly 100 member firms across six continents, shared market intelligence, specialty resources, and multinational client capabilities without selling equity or ceding local control. The network, founded in 1954 and self-described as the world's largest privately held commercial insurance, risk management, and employee benefits brokerage group, counts 21 Partner Firms on Business Insurance's 2026 list of the 100 largest brokers of US business - up from 20 the previous year - and 18 on that publication's separate broker trends rankings. C3 Risk & Insurance Services grew into the top 100 this year, rising from 103rd to 94th.
Miller Manning said the partnership strengthens the resources behind the firm's advice while preserving what clients value most, and that the move carries particular value as The Miller Group continues expanding its property and casualty capabilities. That last detail is the operational signal in the announcement: Assurex membership gives a firm access to specialty placement resources and carrier relationships that would take years to build independently, and property and casualty is where The Miller Group has identified its next growth front.
The Miller Group's path to this point is the piece of the announcement that makes it more than a network addition. Manning took over in 2023 as the third generation of the founding family to lead the firm, following second-generation leaders Sean and Matt Miller. The transition was internal. The ownership stayed in the family. And within two years of that handover, the firm joined a global network that gives it the multinational reach and specialty depth of a much larger operation, without any of the conditions that typically come with acquiring that scale.
Hastings Insurance, the Irish firm that joined Assurex in February, followed a similar pattern: family-owned since 1980, grown by integrating more than 25 businesses over two decades, still private, still family-led when it joined. The Oregon-based Partners Group, which joined in 2023, grew from a regional medical community specialist to a multi-discipline broker while staying independent throughout.
The Assurex model does not generate the deal flow or the valuation multiples that private equity consolidation produces, and it rarely gets the same column space. For agency owners running a family-led firm through a succession or growth phase without a sale on the agenda, the firms joining Assurex this year are a more relevant set of precedents than most of what is covered under the consolidation narrative.
