JOINT FILING AGREEMENT
EXHIBIT 1
In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended,
the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is
defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule
13D (including amendments thereto) with respect to the Class A common stock, par value $0.01 per
share, of Interactive Brokers Group, Inc., a Delaware corporation, and that this Agreement may be
included as an exhibit to such joint filing. This Joint Filing Agreement may be executed in any
number of counterparts, all of which taken together shall constitute one and the same instrument.
IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of the 10th day of July, 2009.
| TCV VI, L.P. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| TCV VII, L.P. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| TCV VII (A), L.P. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| TCV MEMBER FUND, L.P. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| TECHNOLOGY CROSSOVER MANAGEMENT VI, L.L.C. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| TECHNOLOGY CROSSOVER MANAGEMENT VII, L.P. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| TECHNOLOGY CROSSOVER MANAGEMENT VII, LTD. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXX X. XXXX |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXXXXXX X. XXXXXXX |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXXX X. XXXX |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXX X. XXXXXXXX, JR. |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXXXXXX X.X. XXXXXXXX XX |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXXXXX X. XXXXXXX |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
| XXXXXXXXXXX X. XXXXXXXX |
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| By: | /s/ Xxxxx X. Xxxxxx | |||
| Name: | Xxxxx X. Xxxxxx | |||
| Its: Authorized Signatory | ||||
