Exhibit (d)(15)

CALAMOS INVESTMENT TRUST

December 19, 2013

Calamos Advisors LLC

2020 Calamos Court

Naperville, Illinois 60563

Ladies and Gentlemen:

Re: Management Agreement

Pursuant to paragraph 1(b) of the Management Agreement (the “Agreement”) between Calamos Investment Trust and Calamos Advisors LLC dated December 13, 2004, as amended, we hereby notify you that the board of trustees of Calamos Investment Trust have established an additional sub-trust, designated Calamos Emerging Market Equity Fund (the “New Fund”), and have appointed you as Manager to act as manager and investment adviser to that New Fund on the terms and conditions set forth in the Agreement, except that the advisory fee applicable to the New Fund shall be calculated as follows:

The base fee rate shall be at the annual rate of 1.10% of the first $500 million of the average daily net assets; 1.05% of the next $500 million of the average daily net assets; 1.00% of the next $5 billion of the average daily net assets; 0.98% of the next $5 billion of the average daily net assets; 0.96% of the next $5 billion of the average daily net assets; 0.94% of the next $5 billion of the average daily net assets; 0.92% of the next $5 billion of the average daily net assets; and 0.90% in excess of $26 billion.

Please sign below to evidence the acceptance of your appointment as Manager for the New Fund designated Calamos Emerging Market Equity Fund, as set forth above and in the Agreement.

Very truly yours,
CALAMOS INVESTMENT TRUST
By:	/s/ J. Christopher Jackson
	J. Christopher Jackson
	Secretary

Appointment as Manager for the New Fund designated Calamos Emerging Market Equity Fund, as set forth above and in the Agreement is accepted this 19^th day of December 2013.

CALAMOS ADVISORS LLC
By:	/s/ Nimish S. Bhatt
	Nimish S. Bhatt
	Senior Vice President, Chief Financial
	Officer, and Head of Fund Administration