Ryan Specialty Group Climbs in Debut After $1.34 Billion IPO (1)

Ryan Specialty Group Holdings Inc., the insurance company led by Aon Corp. founder Patrick G. Ryan, rose 17% in its trading debut after raising $1.34 billion in an initial public offering.

Shares of Chicago-based Ryan Specialty Group closed Thursday at $27.50, giving it a market value of about $7 billion. The company sold almost 57 million shares for $23.50 each Wednesday after marketing them for $22 to $25.

Ryan, who is chairman and CEO of Ryan Specialty Group, will control 67% of the shareholder voting power in the company after the listing, according to the company’s filings with ...