Bats Global Markets said its first-quarter profit doubled, driven by increased market volume and market share, in its first earnings report as a public company.

Bats went public last month, surging in its market debut after shares priced at the high end of expectations. The deal gave a shot of optimism to the IPO market after a first quarter that saw the fewest US listings since the financial crisis. As of May 5 close at $24.15, the stock is up 27% from its IPO price of $19.