William Blair has acquired Inner Circle Sports, a New York City-based investment bank specializing in the global sports, media, and entertainment ecosystem. The deal expands William Blair's reach into an increasingly attractive sector, though financial terms were not disclosed.

Inner Circle Sports advises team owners, leagues, investors, sports operating companies, municipalities, universities, and media and entertainment companies. Founded in 2002, the firm brings nearly two decades of specialized expertise in sports-related transactions and advisory work.

The acquisition reflects growing institutional interest in sports as an investment category. Major league valuations have surged in recent years, while private equity firms continue targeting sports franchises and related businesses. This move positions William Blair to capture more of that deal flow.

Inner Circle Sports will maintain its brand identity for an unspecified transition period. The combination creates a formidable platform for cross-selling services across William Blair's broader client base while preserving ICS's niche expertise in a market that traditional banks often overlook.