Cboe Global Markets, Inc. is an American financial exchange operator. In the U.S., it owns the largest exchange for trading in options, where it has a 30% market share, and the third-largest exchange for trading in equities, where it has a 10% market share. It operates the largest stock exchange in Europe, where it has a 25% market share. It is headquartered in Chicago, where it maintains an open outcry trading floor.
The company offers trading in options on both stock market indexes and individual stocks, North American equities via its ownership of BZX, BYX, EDGX, and EDGA, Europe and Asia Pacific equities, futures contracts on the VIX, and trading in foreign exchange markets.Wikipedia