<SEC-DOCUMENT>0000945621-22-000125-index.html : 20220214
<SEC-HEADER>0000945621-22-000125.hdr.sgml : 20220214
<ACCEPTANCE-DATETIME>20220214145229
ACCESSION NUMBER:		0000945621-22-000125
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20220214
DATE AS OF CHANGE:		20220214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CALAMOS STRATEGIC TOTAL RETURN FUND
		CENTRAL INDEX KEY:			0001275214
		IRS NUMBER:				043785941
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-84333
		FILM NUMBER:		22629929

	BUSINESS ADDRESS:	
		STREET 1:		2020 CALAMOS COURT
		STREET 2:		C/O CALAMOS ADVISORS LLC
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60653
		BUSINESS PHONE:		6302451046

	MAIL ADDRESS:	
		STREET 1:		2020 CALAMOS COURT
		STREET 2:		C/O CALAMOS ADVISORS LLC
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60653

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUN LIFE FINANCIAL INC
		CENTRAL INDEX KEY:			0001097362
		STANDARD INDUSTRIAL CLASSIFICATION:	LIFE INSURANCE [6311]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			Z4
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		SUN LIFE ASSURANCE CO OF CANADA
		STREET 2:		ONE YORK STREET
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5J 0B6
		BUSINESS PHONE:		4169794800

	MAIL ADDRESS:	
		STREET 1:		SUN LIFE ASSURANCE CO OF CANADA
		STREET 2:		ONE YORK STREET
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5J 0B6

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUN LIFE FINANCIAL SERVICES INC
		DATE OF NAME CHANGE:	20030702

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUN LIFE FINANCIAL SERVICES OF CANADA INC
		DATE OF NAME CHANGE:	20000224
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>calmos13ga4q2021.htm
<DESCRIPTION>AMENDMENT NO. 4 TO SCHEDULE 13G
<TEXT>
Document 1 - file: calmos13ga4q2021.htm

</DOCUMENT>
</SEC-DOCUMENT>