FILING AGREEMENT
EXHIBIT 3
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby
agree that only one statement containing the information required on Schedule 13D (including any
amendments) need be filed with respect to ownership by each of the undersigned of shares of the
common stock of Highbury Financial Inc.
This Agreement may be executed in any number of counterparts, each of which shall be deemed an
original, but all of which together shall constitute one and the same instrument.
Dated: December 15, 2009
| WOODBOURNE PARTNERS, L.P. by its general partner, Xxxxxxx Management Company |
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| /s/ Xxxx X. Xxxx | ||||
| Xxxx X. Xxxx, President | ||||
| XXXXXXX MANAGEMENT COMPANY |
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| /s/ Xxxx X. Xxxx | ||||
| Xxxx X. Xxxx, President | ||||
| XXXX X. XXXX |
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| /s/ Xxxx X. Xxxx | ||||
| Xxxx X. Xxxx | ||||
