SBI Group began in 1999 as the primary investment and financial services arm of SoftBank, the Japanese media and telecommunications company. SoftBank Investment, as it was then called, established several prized investment funds targeting Internet business, capturing Silicon Valley's meteoric growth and placing SBI as one of the most winning technology investors. Some of these successful investments include Yahoo! and E*TRADE. More recently, SBI has found success in other markets, such as China, where it "seeded" the New Horizon Fund I, one of the most successful funds targeting China. Expanding since then, SBI is listed on the first section of the Osaka Securities Exchange and Tokyo Stock Exchange.
On April 27, 2011 SBI securities, a unit of SBI Holdings, agreed to acquire a 25 percent stake in PT BNI Securities, a susidiary company of Bank Negara Indonesia for Rp.114 billion ($16.70 million).