Monex Group
Monex Group is a Japanese financial-services holding company focused on online securities brokerage, trading platforms, and digital-asset services.
Last updated August 26, 2026
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Overview
Monex Group, Inc. is a Tokyo-based Japanese financial-services holding company whose principal activities center on online securities brokerage and related trading services. Its main Japanese operating subsidiary, Monex, Inc., provides internet-based access to securities markets and serves individual investors through an online account and trading platform. The group has also developed international operations through securities businesses in the United States and Hong Kong, as well as digital-asset services through Coincheck. The business was founded on April 5, 1999, by Oki Matsumoto, a former Goldman Sachs partner, together with Sony Corporation. Matsumoto established Monex with the aim of using internet technology to broaden participation in Japan’s capital markets and make investment services more accessible to individual customers. This internet-first orientation shaped the company’s identity and distinguished it from traditional branch-based securities firms. Monex expanded through consolidation in Japan. In 2004, Monex merged with Nikko Beans, a subsidiary of Nikko Cordial Corporation, creating Monex Beans Holdings, Inc. The holding company was listed on the First Section of the Tokyo Stock Exchange in 2005 and adopted the name Monex Group, Inc. in July 2008. These transactions helped combine Monex’s online brokerage capabilities with Nikko Beans’ customer and operating base. The group pursued further geographic and product expansion during the following decade. In 2010, it acquired Boom Securities (H.K.) Limited and related companies, establishing a presence in Hong Kong and strengthening its Asia-Pacific securities activities. In the same year, Monex used a share exchange to make ORIX Securities Corporation a wholly owned subsidiary. The transaction made ORIX Corporation the group’s largest shareholder, with a 22.5 percent stake at the time, and established Monex as an equity-method affiliate of ORIX. Monex Group later broadened its scope beyond conventional securities brokerage. Its United States subsidiary, TradeStation, provides trading services covering securities, options, futures, and cryptocurrency. In April 2018, Monex acquired Coincheck, described in the reference material as one of Japan’s largest cryptocurrency exchanges. Coincheck gave the group a significant position in Japan’s digital-asset market and added cryptocurrency exchange services to its established online-investing franchise. The Monex brand is therefore associated with digitally delivered investment access, self-directed trading, international brokerage capabilities, and the integration of traditional securities with newer digital-asset services. The group’s operating footprint spans Japan and selected overseas markets rather than representing a universal retail bank or a full-service global investment bank. Its principal customer proposition is platform-based access to financial markets for individual and other self-directed investors, supported by specialized subsidiaries such as TradeStation and Coincheck.
History
Monex was established on April 5, 1999, by Oki Matsumoto, a former Goldman Sachs general partner, in partnership with Sony Corporation. The company was created during the early growth of internet-based financial services in Japan. Matsumoto’s stated objective was to use emerging online technology to give individual investors broader and more convenient access to the country’s capital markets. From its beginning, Monex was therefore organized around electronic distribution and self-directed investment rather than a conventional branch-centered securities model. A major stage of consolidation came in 2004, when Monex merged with Nikko Beans, a subsidiary of Nikko Cordial Corporation. The combination created Monex Beans Holdings, Inc., bringing together Monex’s online brokerage activities and Nikko Beans’ business base. The holding company was listed on the First Section of the Tokyo Stock Exchange in 2005. In July 2008, it adopted the name Monex Group, Inc., reflecting the development of a broader corporate group rather than a single Japanese brokerage operation. Monex expanded outside Japan in 2010 by acquiring Boom Securities (H.K.) Limited and related companies. This transaction gave the group a platform in Hong Kong and increased its presence in the Asia-Pacific securities market. Also in 2010, Monex completed a share exchange that made ORIX Securities Corporation a wholly owned subsidiary. ORIX Corporation became Monex’s largest shareholder with a 22.5 percent stake at the time, while Monex became an equity-method affiliate of ORIX. The transactions represented both geographic expansion and domestic industry consolidation. The group subsequently developed a broader international and product portfolio. TradeStation, its United States subsidiary, provides online trading services for securities, options, futures, and cryptocurrency. Through TradeStation, Monex participates in the highly competitive American market for active and self-directed traders, complementing its Japanese brokerage business. In April 2018, Monex Group acquired Coincheck, one of Japan’s largest cryptocurrency exchanges according to the reference material. The acquisition added a digital-asset platform to a group historically identified with online securities brokerage. Coincheck became an important part of Monex’s effort to participate in the emerging cryptocurrency and blockchain-related financial-services sector. Monex Group’s history is consequently defined by three connected developments: the use of the internet to widen access to securities markets, growth through mergers and acquisitions, and the extension of online trading capabilities into international brokerage and digital assets. Its main Japanese business remains online securities trading, while subsidiaries such as TradeStation and Coincheck broaden the group’s geographic coverage and product range.
- 2018
Coincheck acquisition
[1]Monex Group acquired Coincheck in April, adding a major Japanese cryptocurrency exchange to its financial-services portfolio.
- 2010
Expansion through Boom Securities and ORIX Securities
[1]Monex acquired Boom Securities in Hong Kong and integrated ORIX Securities as a wholly owned subsidiary through a share exchange.
- 2008
Company adopts the Monex Group name
[1]The holding company changed its name to Monex Group, Inc. in July.
- 2005
Holding company becomes publicly listed
[1]Monex Beans Holdings was listed on the First Section of the Tokyo Stock Exchange.
- 2004
Merger with Nikko Beans
[1]Monex merged with Nikko Beans, a subsidiary of Nikko Cordial Corporation, to form Monex Beans Holdings, Inc.
- 1999
Monex is founded
[1]Oki Matsumoto founded Monex, Inc. with Sony Corporation on April 5, establishing an internet-focused securities business aimed at individual investors.
Products and positioning
A technology-oriented financial-services group positioned around accessible, self-directed online investing and trading, with additional reach in international brokerage and cryptocurrency services.
Online securities brokerage · 1999
Monex
Monex is the group’s main Japanese operating business. It provides online securities trading and investment-account services, giving individual customers electronic access to financial markets. The business represents the group’s original internet-based brokerage proposition and remains its central Japanese activity.
International trading platform
TradeStation
TradeStation is Monex Group’s United States subsidiary and provides online trading in securities, options, futures, and cryptocurrency. It extends the group’s self-directed trading model into the American market and gives Monex exposure to active traders seeking multi-asset electronic execution.
Cryptocurrency exchange
Coincheck
Coincheck is a Japanese cryptocurrency exchange acquired by Monex Group in April 2018. It expanded the group’s offering beyond conventional securities into digital-asset exchange and related cryptocurrency services.
Hong Kong securities brokerage
Boom Securities
Boom Securities and related companies provided Monex with an operating presence in Hong Kong and a platform for broader Asia-Pacific securities-market activity following the 2010 acquisition.
Brand decisions
2018
Acquire CoincheckM&ABackground
Monex Group sought to expand from online securities brokerage into digital-asset services.
Action taken
The group acquired Coincheck in April 2018.
Aftermath
Coincheck became part of Monex Group’s digital-asset and cryptocurrency business portfolio.
2010
Acquire Boom SecuritiesM&ABackground
Monex pursued international growth and a stronger presence in Asia-Pacific securities markets.
Action taken
The group acquired Boom Securities (H.K.) Limited and related companies.
Aftermath
Monex gained a Hong Kong operating base and expanded its regional securities activities.
2010
Integrate ORIX SecuritiesM&ABackground
Monex used a share exchange to consolidate another Japanese securities business and increase its scale.
Action taken
ORIX Securities Corporation became a wholly owned subsidiary of Monex Group.
Aftermath
ORIX Corporation became Monex’s largest shareholder with a 22.5 percent stake at the time, and Monex became an equity-method affiliate of ORIX.
ORIX Corporation ownership stake. 22.5% (2010)
2004
Merge with Nikko BeansM&ABackground
Monex sought to expand its Japanese online brokerage base through a combination with Nikko Beans, a Nikko Cordial subsidiary.
Action taken
The companies merged and created Monex Beans Holdings, Inc.
Aftermath
The transaction established the holding-company structure that later became Monex Group.
Recent events
- 2018
Monex Group acquires Coincheck[1]
M&A
Monex Group acquired Coincheck, a major Japanese cryptocurrency exchange, expanding the group into digital-asset trading and exchange services.
- 2010
Monex Group expands into Hong Kong through Boom Securities[1]
M&A
The group acquired Boom Securities and related companies, giving it a foothold in Hong Kong and the wider Asia-Pacific securities market.
- 2010
Monex makes ORIX Securities a wholly owned subsidiary[1]
M&A
A share exchange brought ORIX Securities into Monex as a wholly owned subsidiary. ORIX Corporation became Monex’s largest shareholder with a 22.5 percent stake at the time.
- 2005
Monex Beans Holdings lists on the First Section of the Tokyo Stock Exchange[1]
Other
The newly formed holding company became publicly listed on the First Section of the Tokyo Stock Exchange.
- 2004
Monex merges with Nikko Beans to create Monex Beans Holdings[1]
M&A
Monex combined with Nikko Beans, a Nikko Cordial subsidiary, forming the holding company that preceded Monex Group.
Sources4 sources
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