| SC 13G/A | 2014-02-14 | FMR LLC | Interactive Brokers Group, Inc. | 6,765,952 | 12.4% | EDGAR |
| SC 13G/A | 2014-02-14 | RS INVESTMENT MANAGEMENT CO LLC | Interactive Brokers Group, Inc. | 3,328,667 | 6.1% | EDGAR |
| SC 13G | 2014-02-14 | Ancient Art, L.P. | Interactive Brokers Group, Inc. | 2,881,002 | 5.8% | EDGAR |
| SC 13G/A | 2014-02-12 | Kylin Management LLC | Interactive Brokers Group, Inc. | 2,708,500 | 5.4% | EDGAR |
| SC 13G/A | 2014-02-11 | VANGUARD GROUP INC | Interactive Brokers Group, Inc. | 2,982,668 | 5.4% | EDGAR |
| SC 13G/A | 2014-01-29 | BlackRock Inc. | Interactive Brokers Group, Inc. | 3,491,211 | 6.4% | EDGAR |
| SC 13G | 2013-12-11 | Kylin Management LLC | Interactive Brokers Group, Inc. | 2,531,600 | 5.1% | EDGAR |
| SC 13D/A | 2013-11-18 | IBG Holdings LLC | Interactive Brokers Group, Inc. | 4,683,415 | 87.6% | EDGAR |
| SC 13G | 2013-02-15 | RS INVESTMENT MANAGEMENT CO LLC | Interactive Brokers Group, Inc. | - | 7.6% | EDGAR |
| SC 13G/A | 2013-02-14 | FMR LLC | Interactive Brokers Group, Inc. | 5,643,349 | 11.9% | EDGAR |
| SC 13G | 2013-02-13 | VANGUARD GROUP INC | Interactive Brokers Group, Inc. | 2,649,393 | 5.6% | EDGAR |
| SC 13G/A | 2013-02-06 | BlackRock Inc. | Interactive Brokers Group, Inc. | 3,153,771 | 6.6% | EDGAR |
| SC 13D/A | 2013-01-23 | TCV VI L P | Interactive Brokers Group, Inc. | 762 | 0.0% | EDGAR |
| SC 13D/A | 2013-01-08 | TCV VI L P | Interactive Brokers Group, Inc. | 1,249,895 | 2.6% | EDGAR |
| SC 13G/A | 2012-02-14 | FMR LLC | Interactive Brokers Group, Inc. | 4,292,428 | 9.4% | EDGAR |
| SC 13G/A | 2012-02-14 | EMINENCE CAPITAL LLC | Interactive Brokers Group, Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2012-02-13 | PRICE T ROWE ASSOCIATES INC /MD/ | Interactive Brokers Group, Inc. | 58,270 | 0.1% | EDGAR |
| SC 13G/A | 2012-02-09 | BlackRock Inc. | Interactive Brokers Group, Inc. | 4,238,008 | 9.3% | EDGAR |
| SC 13G/A | 2011-06-10 | BAMCO INC /NY/ | Interactive Brokers Group, Inc. | 803,000 | 1.9% | EDGAR |
| SC 13G/A | 2011-02-14 | FMR LLC | Interactive Brokers Group, Inc. | 5,381,946 | 12.7% | EDGAR |