ISE Holdings | 1,924 followers on LinkedIn. The International Securities Exchange Holdings, Inc. (ISE Holdings), now part of Nasdaq, is the owner and operator of three electronic options exchanges: ISE, ISE Gemini, and ISE Mercury. Through its comprehensive exchange offering, ISE Options delivers a superior trading experience to its member firms through its patented market structure, industry-leading technology, unique functionality for trading complex orders, and award-winning customer service.