<SEC-DOCUMENT>0001821268-21-000297-index.html : 20210701
<SEC-HEADER>0001821268-21-000297.hdr.sgml : 20210701
<ACCEPTANCE-DATETIME>20210701092615
ACCESSION NUMBER:		0001821268-21-000297
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		12
CONFORMED PERIOD OF REPORT:	20210430
FILED AS OF DATE:		20210701
DATE AS OF CHANGE:		20210701
EFFECTIVENESS DATE:		20210701

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-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06106
		FILM NUMBER:		211064315

	BUSINESS ADDRESS:	
		STREET 1:		60 STATE ST - 13TH FL
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820
		BUSINESS PHONE:		6177427825

	MAIL ADDRESS:	
		STREET 1:		60 STATE ST
		STREET 2:		13TH 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>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>pio82327.htm
<DESCRIPTION>PIONEER MID CAP VALUE FUND
<TEXT>
Document 1 - file: pio82327.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.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>ex99906cert.htm
<DESCRIPTION>CERTIFICATIONS
<TEXT>
Document 4 - file: ex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>a19385-150621_82327x5x1.jpg
<TEXT>
Document 5 - file: a19385-150621_82327x5x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>a19385-150621_82327x11x1.jpg
<TEXT>
Document 6 - file: a19385-150621_82327x11x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>a19385-150621_82327x13x1.jpg
<TEXT>
Document 7 - file: a19385-150621_82327x13x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>a19385-150621_82327x14x1.jpg
<TEXT>
Document 8 - file: a19385-150621_82327x14x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>a19385-150621_82327x15x1.jpg
<TEXT>
Document 9 - file: a19385-150621_82327x15x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>a19385-150621_82327x16x1.jpg
<TEXT>
Document 10 - file: a19385-150621_82327x16x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>a19385-150621_82327x17x1.jpg
<TEXT>
Document 11 - file: a19385-150621_82327x17x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>a19385-150621_82327x48x1.jpg
<TEXT>
Document 12 - file: a19385-150621_82327x48x1.jpg

</DOCUMENT>
</SEC-DOCUMENT>