In a rare move in the financial exchange world, Miami International, the parent company of the MIAX exchange, is coming public and is expected to start trading on the New York Stock Exchange as soon as Aug.

The exchange operator had previously said it was looking for an initial offering price of between $19 and $21.

Miami International Holdings, the parent of exchange operator MIAX, will begin trading on the NYSE later on Thursday, becoming the first U.S. financial exchange to go public in 15 years. The Princeton,