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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
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MIC-Info: RSA-MD5,RSA,
 LsTChsZkzJIqEKYk4hcLdNXy2UjVeY4BHZH4Dz1o7qikt4yk9rlssqXxqCvK/BDm
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<SEC-DOCUMENT>0001047469-04-024853.txt : 20040730
<SEC-HEADER>0001047469-04-024853.hdr.sgml : 20040730
<ACCEPTANCE-DATETIME>20040730162725
ACCESSION NUMBER:		0001047469-04-024853
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040730
FILED AS OF DATE:		20040730

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ENERGY CO OF MINAS GERAIS
		CENTRAL INDEX KEY:			0001157557
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15224
		FILM NUMBER:		04942625

	BUSINESS ADDRESS:	
		STREET 1:		AVENIDA BARBACENA 1200
		STREET 2:		30190 131 BELO HORIZONTE
		CITY:			MINAS GERAIS BRAZIL
		STATE:			D5
		BUSINESS PHONE:		2128395300

	MAIL ADDRESS:	
		STREET 1:		C/O SIDLEY AUSTIN BROWN & WOOD LLP
		STREET 2:		ONE WORLD TRADE CENTER
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10048-0557
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>a2141151z6-k.htm
<DESCRIPTION>6-K
<TEXT>
<HTML>
<HEAD>

</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK=BLUE  VLINK=PURPLE>
<BR>
<FONT SIZE=3 ><A HREF="#04NYC7012_1">QuickLinks</A></FONT>
<font size=3> -- Click here to rapidly navigate through this document</font>

<P><FONT SIZE=2>
<hr noshade width=100% align=left size=4>
<hr noshade width=100% align=left size=1> </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=5><B>FORM 6-K  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=5><B>SECURITIES AND EXCHANGE COMMISSION<BR>  </B></FONT><FONT SIZE=2><B>WASHINGTON, D.C. 20549  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><B>REPORT OF FOREIGN PRIVATE ISSUER<BR>
PURSUANT TO RULE&nbsp;13A-16 OR 15d-16 OF<BR>
THE SECURITIES EXCHANGE ACT OF 1934  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>For the month of July, 2004 </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>Commission
File Number 1-15224 </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=5><B>Energy Company of Minas Gerais<BR>  </B></FONT><FONT SIZE=2>(Translation of Registrant's Name Into English) </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><B>Avenida Barbacena, 1200<BR>
30190-131 Belo Horizonte, Minas Gerais, Brazil<BR>  </B></FONT><FONT SIZE=2>(Address of Principal Executive Offices) </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate
by check mark whether the registrant files or will file annual reports under cover of Form&nbsp;20-F or Form&nbsp;40-F. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Form&nbsp;20-F&nbsp;&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;Form&nbsp;40-F&nbsp;&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT>
</FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate by check mark if the registrant is submitting the Form&nbsp;6-K in paper as permitted by Regulation&nbsp;S-T
Rule&nbsp;101(b)(1):&nbsp;&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT> </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate by check mark if the registrant is submitting the Form&nbsp;6-K in paper as permitted by Regulation&nbsp;S-T
Rule&nbsp;101(b)(7):&nbsp;&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT> </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission
pursuant to Rule&nbsp;12g3-2(b) under the Securities Exchange Act of 1934. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Yes&nbsp;<FONT FACE="WINGDINGS">&#111;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;No&nbsp;<FONT FACE="WINGDINGS">&#253;</FONT> </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule&nbsp;12g3-2(b): N/A </FONT></P>

<P><FONT SIZE=2><hr
noshade width=100% align=left size=1>
<hr noshade width=100% align=left size=4> </FONT></P>

<HR NOSHADE>
<P style='page-break-before:always'></p>
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<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="mc7012_companhia_energ_eacute;tica_de__com02379"> </A>
<A NAME="toc_mc7012_1"> </A>
<BR></FONT><FONT SIZE=2><B>COMPANHIA ENERG&Eacute;TICA DE MINAS GERAIS&#151;CEMIG<BR>  COMPANHIA ABERTA<BR>  CNPJ 17.155.730/0001-64    <BR>    </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="mc7012_announcement_to_the_market"> </A>
<A NAME="toc_mc7012_2"> </A></FONT> <FONT SIZE=2><B>Announcement to the market    <BR>    </B></FONT></P>

<P><FONT SIZE=2>Cemig
informs its stockholders and investors that, in a meeting held on 28 July&nbsp;2004, the Supervisory Board was informed of the consolidated financial statements for the first half of 2004,
which will be sent to the CVM on 4&nbsp;August. The financial statements showed net profit of R$&nbsp;557&nbsp;million, or R$&nbsp;3.44 per thousand shares. This compares with profit of
R$&nbsp;535&nbsp;million in the same period of 2003, representing an increase of 4%. </FONT></P>

<P><FONT SIZE=2>Sales
revenue was R$&nbsp;3.395&nbsp;billion. Cash flow as measured by Ebitda was R$&nbsp;1.141&nbsp;billion, an increase of 60% from the second half of 2003. </FONT></P>

<P><FONT SIZE=2>Sales
of electricity were 18,670 GWh, 4.5% more than in the first half of 2003, with sales to final consumers totaling 18,420 GWh, 3.7% more than in first half 2003. </FONT></P>

<P><FONT SIZE=2>Operational
expenses were 20% higher, led by: purchases of natural gas for resale, which were up 86%; outsourced services, which increased 20%; and energy bought for resale, 4% higher than in the
first half of 2003. Personnel expenses were 31% higher, primarily resulting from provisioning for expenses under the Voluntary Retirement Program, totaling R$&nbsp;24&nbsp;million, which will make
possible the reduction of approximately 1,000 in the company's number of employees. </FONT></P>

<P><FONT SIZE=2>The
financial result, which was impacted by payment of R$&nbsp;200&nbsp;million in Interest on Equity, also made a significant contribution. </FONT></P>

<P><FONT SIZE=2>Cemig
will hold a meeting with the domestic and international investor markets on 5&nbsp;August, announcing further details and making comments. </FONT></P>


<P><FONT SIZE=2>Belo
Horizonte, 28 July&nbsp;2004 </FONT></P>

<P><FONT SIZE=2>Fl&aacute;vio
Decat de Moura </FONT></P>

<P><FONT SIZE=2>CFO
and Director of Investor Relations </FONT></P>

<HR NOSHADE>
<P style='page-break-before:always'></p>
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<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="me7012_signatures"> </A>
<A NAME="toc_me7012_1"> </A>
<BR></FONT><FONT SIZE=2><B>SIGNATURES    <BR>    </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned,
thereunto duly authorized. </FONT></P>

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<TD WIDTH="39%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=4><FONT SIZE=2>COMPANHIA ENERG&Eacute;TICA DE MINAS GERAIS&#151;CEMIG</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="39%"><FONT SIZE=2><BR>
&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2><BR>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2><BR>
By:</FONT></TD>
<TD COLSPAN=3><FONT SIZE=2><BR>
/s/&nbsp;&nbsp;</FONT><FONT SIZE=2>FL&Aacute;VIO DECAT DE MOURA</FONT><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="39%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD COLSPAN=3><HR NOSHADE></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="39%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>Name:</FONT></TD>
<TD WIDTH="1%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="46%"><FONT SIZE=2>Fl&aacute;vio Decat de Moura</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="39%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="4%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="8%"><FONT SIZE=2>Title:</FONT></TD>
<TD WIDTH="1%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="46%"><FONT SIZE=2>Chief Financial Officer and Investor Relations&nbsp;Officer</FONT></TD>
</TR>
</TABLE>
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<P><FONT SIZE=2>Date:
July&nbsp;30, 2004 </FONT></P>

<HR NOSHADE>
<P style='page-break-before:always'></p>
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<BR>
<P><br><A NAME="04NYC7012_1">QuickLinks</A><br></P><!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_mc7012_1">COMPANHIA ENERG&Eacute;TICA DE MINAS GERAIS&#151;CEMIG COMPANHIA ABERTA CNPJ 17.155.730/0001-64</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_mc7012_2">Announcement to the market</A></FONT><BR>
<!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_me7012_1">SIGNATURES</A></FONT><BR>
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