<SEC-DOCUMENT>0000945621-21-000133-index.html : 20210216
<SEC-HEADER>0000945621-21-000133.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216145541
ACCESSION NUMBER:		0000945621-21-000133
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216

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:		21636629

	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 Assurance Co of Canada
		CENTRAL INDEX KEY:			0001381352
		IRS NUMBER:				381082080
		STATE OF INCORPORATION:			A6
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE YORK STREET
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5J 0B6
		BUSINESS PHONE:		416-979-9966

	MAIL ADDRESS:	
		STREET 1:		ONE YORK STREET
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5J 0B6

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Sun Life Assurance CO of Canada
		DATE OF NAME CHANGE:	20061117
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>calamos13ga4q2020.htm
<DESCRIPTION>AMENDMENT NO. 3 TO SCHEDULE 13G
<TEXT>
Document 1 - file: calamos13ga4q2020.htm

</DOCUMENT>
</SEC-DOCUMENT>