Monex Group, Inc. (マネックスグループ株式会社) is a financial services company based in Tokyo, Japan. Monex Inc., its main subsidiary, engages in online securities trading, with approximately 2 million accounts. In 2010, the company integrated its operations by making ORIX Securities Corporation its wholly owned subsidiary through a share exchange. As a result, ORIX Corporation became the largest shareholder with a 22.5% stake and became an equity method affiliate of ORIX Corporation. TradeStation, its US subsidiary, provides securities, options, futures and cryptocurrency trading services. The Monex Group acquired Coincheck, which is one of the largest crypto exchanges in Japan, in April 2018.