Altamont Capital Partners-Backed Accelerant Holdings Completes Initial Public Offering

PALO ALTO, Calif., July 25, 2025 /PRNewswire/ -- Altamont Capital Partners (Altamont)-backed Accelerant Holdings (Accelerant) successfully completed its initial public offering on July 25. Altamont, a business-building private equity firm with deep expertise in financial services, has been the majority investor in Accelerant since its launch in 2019, closely partnering with the management team to create the highly innovative Risk Exchange platform. 

Leveraging its proven platform creation playbook and deep industry experience, Altamont has helped Accelerant scale its exchange from inception to more than $3.5 billion of gross written premium¹ across 232 Members. The firm worked closely with the Accelerant team, including Co-Founder and CEO Jeff Radke, to hire the requisite talent and develop the systems and technology partnerships to support this growth, while, as the controlling shareholder, playing a key role in the company's strategic decisions over the last six-plus years.

"The expertise we have developed across the entire insurance value chain enabled us to recognize the true differentiation in Accelerant's business model from the first meeting," said Sam Gaynor, Managing Director at Altamont. "And we're proud that our experience and relationships have been additive in helping Accelerant deliver the tremendous value it has to both the supply (specialty underwriters) and demand (risk capital) sides of its Exchange."

"The Accelerant partnership is a prime example of Altamont's strategy of transforming and scaling its portfolio companies," commented Keoni Schwartz, Co-Founder and Managing Director at Altamont. "We combine deep industry expertise with decades of experience driving fundamental growth in lower-middle-market businesses in order to drive outsized outcomes for both management and our investors, and our work with the Accelerant team to scale the company from a true start-up to an IPO is a terrific testament to that approach."

Both Keoni Schwartz and Sam Gaynor will retain board seats in support of Accelerant's continued growth and development.

About Altamont Capital Partners

Founded in 2010, Altamont Capital Partners ("Altamont") is a private equity firm focused on transforming and scaling lower-middle market companies through significant business-building and value-creation resources. Altamont makes long-term, control investments in sectors where we have deep experience and specialized knowledge, and partners with management teams to execute proven and repeatable platform-building playbooks. Since inception, Altamont has invested in over 45 companies operating across the Financial Services, Industrials, Business Services, and Franchising & Multi-Unit sectors. Altamont currently manages over $4 billion of capital and is headquartered in Palo Alto, California, with additional offices in San Francisco and Austin, Texas.

¹ As of 3/31/25 LTM

Media Contact:
Charlotte Freeman
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SOURCE Altamont Capital Partners