Miami International Holdings, Inc.

Miami International Holdings runs electronic marketplaces where investors and traders buy and sell financial products. The company operates exchanges where people trade stock options (contracts that give the right to buy or sell stocks at a set price), individual stocks, and futures (contracts to buy or sell commodities like wheat at a future date). They also own a futures brokerage firm called Dorman Trading that helps smaller brokers and individual traders execute their trades and settle their accounts.