Calamos Investment Trust Amendment to Transfer Agent Servicing Agreement

Exhibit (h) (16)

Calamos Investment Trust

Amendment to Transfer Agent Servicing Agreement

     This is an amendment (the “Amendment”) to the Transfer Agent Servicing Agreement, dated January 1, 2007, by and among Calamos Investment Trust, Calamos Advisors Trust and U.S. Bancorp Fund Services, LLC (the “Agreement”).

     In consideration of the mutual covenants and agreements contained herein, the parties agree to the following amendments to the Agreement:

     1. Exhibit A of the Agreement is hereby changed as follows:

          The Calamos Fund Complex shall mean:

Calamos Investment Trust

Calamos Growth Fund
Calamos Blue Chip Fund
Calamos Value Fund
Calamos Growth & Income Fund
Calamos International Growth Fund
Calamos Global Growth & Income Fund
Calamos High Yield Fund
Calamos Convertible Fund
Calamos Market Neutral Income Fund
Calamos Multi-Fund Blend
Calamos Global Equity Fund
Calamos Government Money Market Fund
Calamos Total Return Bond Fund
Calamos 130/30 Equity Growth Fund
Calamos New World Growth Fund

Calamos Advisors Trust

Calamos Growth and Income Portfolio

     All other terms of the Agreement shall remain in full force and effect. If the terms of the Agreement and this Amendment conflict, the terms of this Amendment shall govern.

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     Each party represents that the undersigned has full power and authority to execute this Amendment and bind such party according to the terms herein.

Dated: Xxxxx 0, 0000

Xxxxxxx Investment Trust				U.S. Bancorp Fund Services LLC
By:		/s/ Xxxxxx Xxxxx		By:		/s/ Xxxxxxx XxXxx
Name:		Xxxxxx Xxxxx		Name:		Xxxxxxx XxXxx
Title:		Secretary		Title:		Executive Vice President
Calamos Advisors Trust
By:		/s/ Xxxxxx Xxxxx
Name:		Xxxxxx Xxxxx
Title:		Secretary