AMENDMENT TO UNIT PURCHASE OPTION

AMENDMENT TO

UNIT PURCHASE OPTION

This AMENDMENT TO UNIT PURCHASE OPTION (this “Amendment”), dated December 15, 2006, is made by and between HIGHBURY FINANCIAL INC. (the “Company”) and THINKEQUITY PARTNERS LLC (“Holder”), to that certain Unit Purchase Option referred to below.

WHEREAS, the Company granted to the Holder that certain Unit Purchase Option, dated January 31, 2006 (the “Unit Purchase Option”); and

WHEREAS, the parties hereto have agreed that the Unit Purchase Option be amended as set forth herein.

NOW, THEREFORE, in consideration of the premises and of the agreements contained herein, the parties hereto hereby agree as follows:

1. Amendment to the Unit Purchase Option. Effective as of the date hereof, Section 5.3 of the Unit Purchase Option is and shall be amended and restated in its entirety as follows:

“5.3 No Net-Cash Settlement or Damages Upon Failure of Registration. In no event shall the registered Holder of this Purchase Option be entitled to (i) receive a net-cash settlement or other consideration in lieu of physical settlement in Units, shares of Common Stock or Warrants of this Purchase Option or any Registrable Security, regardless of whether any or all of the Registrable Securities have been registered by the Company pursuant to an effective registration statement, or (ii) receive any damages if any or all of the Registrable Securities have not been registered by the Company pursuant to an effective registration statement, subject to the requirement that the Company use its best efforts to have a registration statement or post-effective amendment filed pursuant to Section 5.1 declared effective as soon as possible after receiving the Initial Demand Notice. In the absence of an effective registration statement, the Purchase Option, or if the Purchase Option is exercised prior to expiration, the Warrants included in the Purchase Option, may expire unexercised or unredeemed.”

2. Reference to and Effect on the Unit Purchase Option. Upon the due execution and delivery of this Amendment by the parties hereto, on and after the date hereof each reference in the Unit Purchase Option to this “Purchase Option”, “hereunder”, “hereof”, “herein” or words of like import referring to the Unit Purchase Option shall mean and be a reference to the Unit Purchase Option, as amended hereby. Except as specifically amended above, the Unit Purchase Option shall remain in full force and effect and is hereby ratified and confirmed.

3. Execution in Counterparts. This Amendment may be executed in one or more counterparts, and by the different parties hereto in separate counterparts, each of which shall be deemed to be an original, but all of which taken together shall constitute one and the same agreement, and shall become effective when one or more counterparts has been signed by each of the parties hereto and delivered to each of the other parties hereto.

IN WITNESS WHEREOF, the parties have executed this AMENDMENT TO UNIT PURCHASE OPTION as of the date first set forth above.

	HIGHBURY FINANCIAL INC.
	By:	/s/ Xxxxxxx X. Xxxxx
		Name: Xxxxxxx X. Xxxxx
		Title: President and Chief Executive Officer

	THINKEQUITY PARTNERS LLC
	By:	/s/ Xxxxxxx X. Xxxxxx
		Name: Xxxxxxx X. Xxxxxx
		Title: EVP