May 12 (Reuters) - Emergency medical services provider GMR Solutions has raised $478.7 million in its U.S. initial public ‌offering, the company said on Tuesday, after selling ‌31.9 million shares at $15 apiece.

The Lewisville, Texas-based company, known as Global Medical ​Response, has secured a valuation of roughly $3.35 billion.

GMR Solutions had lowered its expectations after initially targeting up to $797.9 million through a proposed price range of $22 to $25 apiece.

The rebound in ‌IPO activity has boosted ⁠market sentiment, prompting companies to accelerate listings while the market window remains open, even as ⁠persistent volatility and geopolitical uncertainty continue to weigh on investor appetite.

GMR is a U.S.-based emergency medical services provider offering ​air and ​ground ambulance transport, mobile healthcare ​and disaster response services, ‌with operations spanning urban and rural communities nationwide.

The company, which completed a $5.4 billion refinancing in 2025, operates across 1,400 U.S. counties.

In 2015, investment firm KKR acquired air ambulance provider Air Medical from Bain Capital in a roughly $2 billion deal.

The ‌New York-based firm later combined Air ​Medical with American Medical Response ​in 2018, after acquiring ​the company from Envision Healthcare for $2.4 billion, ‌to form Global Medical Response.

GMR ​is expected to ​begin trading on the New York Stock Exchange on Wednesday under the symbol "GMRS", with J.P. Morgan, KKR and BofA ​Securities among the ‌underwriters on the offering.

(Reporting by Prakhar Srivastava in Bengaluru ​and Carlos Méndez in México City; Editing by ​Shailesh Kuber and Sherry Jacob-Phillips)