X0303 4 2009-12-31 0001381197 Interactive Brokers Group, Inc. IBKR 0001343722 Trudeau Robert C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 1 0 1 1 May be part of a 13(d) group 0001082906 HOAG JAY C C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001197937 KIMBALL RICK C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001188456 DREW JOHN C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001188444 REYNOLDS JON Q JR C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001188458 GRIFFITH WILLIAM C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 1 1 May be part of a 13(d) group 0001440008 Marshall Christopher P C/O TECHNOLOGY CROSSOVER VENTURES 528 RAMONA STREET PALO ALTO CA 94301 0 0 0 1 May be part of a 13(d) group Common Stock 2009-12-31 4 A 0 4233 0 A 4233 I Robert W. Trudeau Common Stock 1487970 I TCV VI, L.P. Common Stock 2289635 I TCV VII, L.P. Common Stock 1189061 I TCV VII (A), L.P. Common Stock 33334 I TCV Member Fund, L.P. Represents a grant of restricted stock which will vest in five equal annual installments, beginning on December 31, 2010. These shares of restricted stock are directly held by Robert W. Trudeau. Mr. Trudeau has the sole voting and dispositive power over the shares; however, TCV VI Management, L.L.C. ("Management VI") and TCV VII Management, L.L.C. ("Management VII") collectively own 100% of the pecuniary interest therein. Mr. Trudeau, Jay C. Hoag, Richard H. Kimball, John L. Drew, Jon Q. Reynolds, Jr., and William J.G. Griffith IV (collectively, the "TCM VI Members") are members of Management VI and each of the TCM VI Members and Christopher P. Marshall (collectively, the "TCM VII Members") are members of Management VII, but each disclaims beneficial ownership of such shares except to the extent of their pecuniary interest therein. These securities are directly held by TCV VI, L.P. The TCM VI Members are Class A Members of Technology Crossover Management VI, L.L.C. ("TCM VI"), which is the sole general partner of TCV VI, L.P. The TCM VI Members and TCM VI may be deemed to beneficially own the securities held by TCV VI, L.P., but the TCM VI Members and TCM VI disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. These securities are directly held by TCV VII, L.P. The TCM VII Members are Class A Directors of Technology Crossover Management VII, Ltd. ("TCM VII") and limited partners of Technology Crossover Management VII, L.P. ("TCM VII LP"). TCM VII is the general partner of TCM VII LP, which is the general partner of TCV VII, L.P. The TCM VII Members, TCM VII and TCM VII LP may be deemed to beneficially own the securities held by TCV VII, L.P., but the TCM VII Members , TCM VII and TCM VII LP disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. These securities are directly held by TCV VII (A), L.P. The TCM VII Members are Class A Directors of TCM VII and limited partners of TCM VII LP. TCM VII is the general partner of TCM VII LP, which is the general partner of TCV VII (A), L.P. The TCM VII Members, TCM VII and TCM VII LP may be deemed to beneficially own the securities held by TCV VII (A), L.P., but the TCM VII Members, TCM VII and TCM VII LP disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. These securities are directly held by TCV Member Fund, L.P. ("TCV MF"). The TCM VII Members are Class A Directors of TCM VII, which is a general partner of TCV MF, and limited partners of TCV MF. The TCM VI Members are Class A Members of TCM VI, which is also a general partner of TCV MF. The TCM VII Members, TCM VII, the TCM VI Members and TCM VI may be deemed to beneficially own certain of the securities held by TCV MF, but the TCM VII Members, TCM VII, the TCM VI Members and TCM VI disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein. Frederic D. Fenton Authorized signatory for Robert W. Trudeau 2010-01-05 Frederic D. Fenton Authorized signatory for Jay C. Hoag 2010-01-05 Frederic D. Fenton Authorized signatory for Richard H. Kimball 2010-01-05 Frederic D. Fenton Authorized signatory for John L. Drew 2010-01-05 Frederic D. Fenton Authorized signatory for Jon Q. Reynolds, Jr. 2010-01-05 Frederic D. Fenton Authorized signatory for William J.G. Griffith IV 2010-01-05 Frederic D. Fenton Authorized signatory for Christopher P. Marshall 2010-01-05