Interactive Brokers Stock Turned $10,000 Into About $110,000 in a Decade. The Customer Base Grew Even Faster.

Key Points A $10,000 investment in Interactive Brokers at the end of September 2016 is worth about $110,000 today with dividends reinvested. Customer accounts have grown from 370,000 at the end of September 2016 to 5.46 million as of August. Net interest income has grown nearly sevenfold over the decade and is currently the company's biggest revenue line. 10 stocks we like better than Interactive Brokers Group › Ten years ago, shares of Interactive Brokers (NASDAQ:IBKR) closed out September 2016 at a split-adjusted $8.82 (the company split its stock 4-for-1 in June 2025). The stock trades around $91 as of this writing. The price alone increased about tenfold.