An insurance exchange backed by billionaire financier Todd Boehly has shed nearly a third of its market value following revelations about its dependence on a single business partner.
Accelerant, a Cayman Islands-based company that went public in New York in July, told investors that most of its third-party premiums were tied to Hadron, an insurer launched by Altamont Capital. Analysts raised concerns about the relationship during an earnings call last week, triggering a sharp drop in Accelerant’s share price, according to a report by the Financial Times.
Boehly’s Eldridge Industries held about a 3% stake in Accelerant at the time of its listing. Boehly, known for his sports investments, stepped down from Accelerant’s board earlier this year, the Financial Times reported.
Accelerant is seeking to expand in the specialist insurance sector, which covers risks ranging from property damage to cyberattacks. That business is dominated by Lloyd’s of London, which wrote £55.5 billion in premiums last year. Accelerant reported $3.8 billion in exchange written premium in the 12 months to June, up 53% from the prior year.
Goldman Sachs analysts noted that investors may have underestimated Accelerant’s reliance on Hadron, although it insured just 16% of total Exchange Written Premium in Q2 2025, and the firm has more than 95 risk capital partners. It warned that concerns about the company’s ability to grow independent partnerships had fueled the stock’s decline.
Both Accelerant and Hadron operate in a fast-growing corner of the insurance market centered on managing general agents. These firms specialize in niche risks but rely on insurers and outside investors to provide capital and licenses. Their lean business models have drawn strong interest from private equity firms.
Hadron serves as a “fronting insurer,” channeling business from MGAs through to investors and reinsurers. The company was launched in November of 2023 with more than $250 million in capital from Altamont.
Accelerant, founded in 2018 by Jeff Radke, acts as an intermediary and provides technology to evaluate the risks originated by MGAs.
Altamont, which co-founded Hadron, controlled a 79% voting stake in Accelerant at the time of its IPO, the Financial Times reported. The two companies have insisted that their dealings are conducted on market terms.
“Hadron and Accelerant operate on market-based and fully arms-length terms,” Altamont co-founder Keoni Schwartz said in a statement to the publication. He added that Hadron’s share of Accelerant’s premiums is expected to shrink as other partners expand.
Still, the disclosure that Hadron accounted for roughly 60% of Accelerant’s third-party premiums underscored the risks of heavy reliance on one insurer. The sell-off also highlighted investor unease over the interconnected ownership structures shaping a lightly regulated but rapidly expanding segment of the insurance industry.
