Monex Group, Inc. 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, Monex made ORIX Securities Corporation a wholly owned subsidiary through a share exchange, making ORIX Corporation its largest shareholder with a 22.5% stake. TradeStation, its US subsidiary, provides securities, options, futures and cryptocurrency trading services. In April 2018, Monex Group acquired Coincheck, one of Japan's largest crypto exchanges. Wikipedia