Exhibit (H)(37)

CALAMOS INVESTMENT TRUST AND
CALAMOS ADVISORS TRUST
AMENDMENT TO THE TRANSFER AGENT SERVICING
AGREEMENT

     THIS AMENDMENT dated as of this 16^th day of January, 2009 to the Transfer Agent Servicing Agreement, dated as of January 1, 2007, as amended May 8, 2007, June 15, 2007, March 7, 2008 and October 22, 2008 (the “Agreement”), is entered into by and among CALAMOS INVESTMENT TRUST, a Massachusetts business trust, CALAMOS ADVISORS TRUST, a Massachusetts business trust (collectively the “Trusts”), and U.S. BANCORP FUND SERVICES, LLC, a Wisconsin limited liability company (“USBFS”).

WHEREAS, the parties desire to extend the length of the Agreement and to amend the fees of the Agreement; and

WHEREAS, Section 14 of the Agreement allows for its amendment by written agreement executed by the parties; and

NOW THEREFORE, the parties agree that the Agreement is hereby amended as follows:

Section 14 shall be superseded and replaced with the following:

14. Term of Agreement; Amendment

This Agreement shall become effective as of January 1, 2009 and will continue in effect for a period of three (3) years. Notwithstanding the foregoing, after the first full year of this three-year term, or January 1, 2010, this Agreement may be terminated by either party upon giving 180 days prior written notice to the other party or such shorter period as is mutually agreed upon by the parties. Further, this Agreement may be terminated at any time by any party upon the breach of the other party of any material term of this Agreement if such breach is not cured within 15 days of notice of such breach to the breaching party. This Agreement may not be amended or modified in any manner except by written agreement executed by USBFS and the Trust and authorized or approved by the Board of Trustees. The provisions of this Section 14 shall also apply to Exhibit C, Exhibit D and Exhibit E.

Exhibit E is hereby superseded and replaced with Exhibit E attached hereto:

Except to the extent amended hereby, the Agreement shall remain in full force and effect.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by a duly authorized officer on one or more counterparts as of the date and year first written above.

CALAMOS INVESTMENT TRUST		U.S. BANCORP FUND SERVICES, LLC
By:	/s/ Nimish S. Bhatt	By:	/s/ Ian Martin
Name:     NIMISH S. BHATT		Name: Ian Martin
Title:       VP & CFO		Title: Executive Vice President
	CALAMOS ADVISORS TRUST
By:	/s/ Nimish S. Bhatt
Name:     NIMISH S. BHATT
Title:       VP & CFO

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Exhibit E to the Transfer Agent Agreement

CALAMOS INVESTMENT TRUST
CALAMOS ADVISORS TRUST
TRANSFER AGENT SERVICING AGREEMENT
Beginning January 1, 2009

CCO annual support fees: $5,000
Annual Fee Per Shareholder Account
	Direct Open Accounts
		$15.00 per no-load account
		$16.00 per load account — first 25,000 accounts
		$14.00 per load account-next 75,000 accounts
		$14.00 per load account — balance of accounts
		$21.00 per shareholder account — money market
	Direct Closed Accounts
		$5.00 per account
	Minimum annual fee: WAIVE
		$28,000 for the first fund or class
		$10,000 each additional fund or class
	CUSIP fee: WAIVE
		$2,400 per CUSIP
	NSCC Network Level 3 Accounts
		$8.00 per account — first 400,000 accounts
		$7.00 per account — balance of accounts
	NSCC Network Level 3 Closed Accounts
		$5.00 per account — first 25,000 accounts
		$2.50 per account — balance of accounts
Plus Fund Group Asset Fee (monthly assets calculated on average daily net assets)
		.75 basis point per year — First $15.0 billion
		.5 basis point per year — Next $5.0 billion
		.25 basis point per year — Next $5.0 billion
		.15 basis point per year — Balance of fund group assets
		-Monthly Assets calculated on Avg Daily Net Assets
	Omnibus Transaction Fees: $.20/transaction
Telephone Calls — $1.00 per call — waive
	Draft Check Processing — $1.00 per draft — waive

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	Daily Valuation Trades — $6.75 per trade — waive
	ACH Shareholder Services — waive
Plus Out-of-Pockct Expenses, including but not limited to:
	Telephone — toll free lines
	Retention of records
	Postage
	Microfilm/fiche of records
	Programming, Special reports
	Stationery/envelopes
	Insurance
	NSCC charges
	FANWEB activity fees
	Vision ID’s and activity fees
	Proxies
	All other out-of-pocket expenses

Qualified Plan Fees (Billed to Investors)                  WAIVE
	Annual maintenance fee per account	$15.00 / account (Cap at $30.00 per SSN)
	Coverdell Education Savings account	$15.00 / account (Cap at $30.00 / per SSN)
	Distribution to participant	$25.00 / transaction (Exclusive of SWP)
	Refund of excess contribution	$25.00 / transaction
Additional Shareholder Fees (Billed to Investors)
	Any outgoing wire transfer	$15.00 / wire
	Telephone exchange	$5.00 / exch. WAIVE
	Transfer to successor trustee	$25.00 / transfer
	Return check fee	$25.00 / item
	Stop payment	$25.00 / stop (Liquidation, dividend, draft check)
	Research fee	$5.00 / item (For requested items of the second calendar
		year [or previous] to the request)(Cap at $25.00)
WAIVE 12b-l Payments		$6,000 per year for all funds
AML Fees:
	Annual Base Fee	$5,000
	New domestic accounts	$1.00 per account
	New foreign accounts	$2.00 per account
	Shareholder verifications	$.25 per item

WAIVE File Transfer	$160/month and $.01 /record
Shareholder System Select Request	$300.00 / request
Systems Development/Programming	$150.00 / hour
Fund Group Addition	$2,000.00 / fund group
Fund Additions	$1,500.00 / fund or class
Lost Shareholder Search (Keane Tracers)	$5.00 / search
WAIVE - FANWEB base fee, FAN MAIL, AND EB2B FEES
Fees and out-of-pocket expenses are billed to the fund monthly.

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