Historically, the operations have been known by the company name OMX AB (Aktiebolaget Optionsmäklarna/Helsinki Stock Exchange), which was created in 2003 upon a merger between OM AB and HEX plc. In 2015, the legal entity OMX AB was renamed Nasdaq AB, but it also operates under the alias Nasdaq OMX AB.[3][4] The operations have been part of Nasdaq, Inc. (formerly known as Nasdaq OMX Group) since February 2008.[5]