Shares of I3 Verticals Inc. have soared 42% in Thursday trading, following the payments company's initial public offering. I3 priced its IPO at $13 a share late Wednesday, and shares are now trading above $18. The company priced 6.65 million shares, and its offering raised about $86 million. The first trade was executed for $18 at 11:12 a.m. ET. The company makes payment software solutions for small- and medium-sized businesses. Its IPO comes as the Renaissance IPO ETF is up 8.9% this year and the S&P 500 is up 3%.