CALAMOS INVESTMENT TRUST December 15, 2015

CALAMOS INVESTMENT TRUST

December 15, 2015

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-trusts, designated Calamos Phineus Long/Short Fund (“Phineus Long/Short Fund”) (the “New Fund”), and have appointed you as Manager to act as manager and investment adviser to those New Funds on the terms and conditions set forth in the Agreement, except that the advisory fee applicable to Phineus Long/Short shall be calculated as follows:

The base fee rate shall be at the annual rate of 1.25% of the first $500 million of the average daily net assets; 1.20% of the next $500 million of the average daily net assets; and 1.15% in excess of $1 billion; and

Please sign below to evidence the acceptance of your appointment as Manager for the New Fund designated Xxxxxxx Xxxxxxx Long/Short Fund, as set forth above and in the Agreement.

Very truly yours,
CALAMOS INVESTMENT TRUST
By:		/s/ X. Xxxxxxxxxxx Xxxxxxx
		X. Xxxxxxxxxxx Xxxxxxx
		Secretary

Appointment as Manager for the New Fund designated Calamos Phineus Long/Short Fund, as set forth above and in the Agreement is accepted this 15 day of December 2015.

CALAMOS ADVISORS LLC
By:		/s/ Xxxxxx X. Xxxxx
		Xxxxxx X. Xxxxx
		Senior Vice President, Chief Financial Officer, and Head of Fund Administration