<SEC-DOCUMENT>0001821268-21-000382-index.html : 20210901
<SEC-HEADER>0001821268-21-000382.hdr.sgml : 20210901
<ACCEPTANCE-DATETIME>20210901150848
ACCESSION NUMBER:		0001821268-21-000382
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20210630
FILED AS OF DATE:		20210901
DATE AS OF CHANGE:		20210901
EFFECTIVENESS DATE:		20210901

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIONEER SERIES TRUST XI
		CENTRAL INDEX KEY:			0000078758
		IRS NUMBER:				042458787
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-01835
		FILM NUMBER:		211229852

	BUSINESS ADDRESS:	
		STREET 1:		60 STATE ST
		STREET 2:		5TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		617-742-7825

	MAIL ADDRESS:	
		STREET 1:		60 STATE STREET, 5TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER VALUE FUND
		DATE OF NAME CHANGE:	20010402

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER II
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER II INC
		DATE OF NAME CHANGE:	19851112
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000078758
<SERIES-ID>S000010136
<SERIES-NAME>Pioneer Core Equity Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000028137
<CLASS-CONTRACT-NAME>Pioneer Core Equity Fund: Class A
<CLASS-CONTRACT-TICKER-SYMBOL>PIOTX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000028139
<CLASS-CONTRACT-NAME>Pioneer Core Equity Fund: Class C
<CLASS-CONTRACT-TICKER-SYMBOL>PCOTX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000028140
<CLASS-CONTRACT-NAME>Pioneer Core Equity Fund: Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>PVFYX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000202493
<CLASS-CONTRACT-NAME>Pioneer Core Equity Fund: Class K
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000203260
<CLASS-CONTRACT-NAME>Pioneer Core Equity Fund: Class R
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>pio82584-ncsr.htm
<DESCRIPTION>PIONEER CORE EQUITY FUND
<TEXT>
Document 1 - file: pio82584-ncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A11 CODE ETH
<SEQUENCE>2
<FILENAME>ex99codeofethics.htm
<DESCRIPTION>CODE OF ETHICS
<TEXT>
Document 2 - file: ex99codeofethics.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>3
<FILENAME>ex99cert.htm
<DESCRIPTION>CERTIFICATIONS
<TEXT>
Document 3 - file: ex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>4
<FILENAME>ex99906.htm
<DESCRIPTION>CERTIFICATIONS
<TEXT>
Document 4 - file: ex99906.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>a19408-150821_825845x1x1.gif
<TEXT>
Document 5 - file: a19408-150821_825845x1x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>a19408-150821_825845x5x1.gif
<TEXT>
Document 6 - file: a19408-150821_825845x5x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>a19408-150821_825845x11x1.gif
<TEXT>
Document 7 - file: a19408-150821_825845x11x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>a19408-150821_825845x13x1.gif
<TEXT>
Document 8 - file: a19408-150821_825845x13x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>a19408-150821_825845x14x1.gif
<TEXT>
Document 9 - file: a19408-150821_825845x14x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>a19408-150821_825845x15x1.gif
<TEXT>
Document 10 - file: a19408-150821_825845x15x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>a19408-150821_825845x16x1.gif
<TEXT>
Document 11 - file: a19408-150821_825845x16x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>a19408-150821_825845x17x1.gif
<TEXT>
Document 12 - file: a19408-150821_825845x17x1.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>a19408-150821_825845x48x1.gif
<TEXT>
Document 13 - file: a19408-150821_825845x48x1.gif

</DOCUMENT>
</SEC-DOCUMENT>