<SEC-DOCUMENT>0001752724-23-235989-index.html : 20231025
<SEC-HEADER>0001752724-23-235989.hdr.sgml : 20231025
<ACCEPTANCE-DATETIME>20231025073232
ACCESSION NUMBER:		0001752724-23-235989
CONFORMED SUBMISSION TYPE:	N-CEN/A
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20191031
FILED AS OF DATE:		20231025
DATE AS OF CHANGE:		20231025
EFFECTIVENESS DATE:		20231025

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIONEER MID CAP VALUE FUND
		CENTRAL INDEX KEY:			0000863334
		IRS NUMBER:				043091159
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		N-CEN/A
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06106
		FILM NUMBER:		231343949

	BUSINESS ADDRESS:	
		STREET 1:		60 STATE ST - 5TH FL
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820
		BUSINESS PHONE:		617-742-7825

	MAIL ADDRESS:	
		STREET 1:		60 STATE ST
		STREET 2:		5TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER CAPITAL GROWTH FUND /MA/
		DATE OF NAME CHANGE:	19980630

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER GROWTH TRUST
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000863334
<SERIES-ID>S000004143
<SERIES-NAME>Pioneer Mid Cap Value Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011629
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class A
<CLASS-CONTRACT-TICKER-SYMBOL>PCGRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011631
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class C
<CLASS-CONTRACT-TICKER-SYMBOL>PCCGX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011632
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>PYCGX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011633
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class R
<CLASS-CONTRACT-TICKER-SYMBOL>PCMRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000156004
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class K
<CLASS-CONTRACT-TICKER-SYMBOL>PMCKX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CEN/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>INTERNAL CONTROL RPT
<SEQUENCE>2
<FILENAME>NCEN_Pio_Mid_Cap_Value_Fund.txt
<TEXT>
Document 2 - file: NCEN_Pio_Mid_Cap_Value_Fund.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>OTHER REQUIRED INFO
<SEQUENCE>3
<FILENAME>explanatory_note_2023.htm
<TEXT>
Document 3 - file: explanatory_note_2023.htm

</DOCUMENT>
</SEC-DOCUMENT>