-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Gc6BlwCrPqwZGoWCRRZsrYHpakpFmDEhsRp1KDg+DR9DVJGqbO2J4xmecN2tMosv
 aBlbD09euBtAzZUh7R258g==

<SEC-DOCUMENT>0001309014-10-000060.txt : 20100129
<SEC-HEADER>0001309014-10-000060.hdr.sgml : 20100129
<ACCEPTANCE-DATETIME>20100129063650
ACCESSION NUMBER:		0001309014-10-000060
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20100129
FILED AS OF DATE:		20100129
DATE AS OF CHANGE:		20100129

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED MICROELECTRONICS CORP
		CENTRAL INDEX KEY:			0001033767
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15128
		FILM NUMBER:		10555609

	BUSINESS ADDRESS:	
		STREET 1:		978 HIGHLANDS CIRCLE
		CITY:			LOS ALTOS
		STATE:			CA
		ZIP:			94024
		BUSINESS PHONE:		6509688855

	MAIL ADDRESS:	
		STREET 1:		978 HIGHLANDS CIRCLE
		CITY:			LOS ALTOS
		STATE:			CA
		ZIP:			94024
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>htm_4721.htm
<DESCRIPTION>LIVE FILING
<TEXT>
<!-- HTML Header Page -->
<HTML>
<HEAD>
<TITLE>
United Microelectronics Corporation&nbsp;-&nbsp;Form&nbsp;6-K
</TITLE>
</HEAD>
<!-- End HTML Header Page --><!-- Cover Page Header -->
<BODY bgcolor=white text=black>
<HR NOSHADE>
<A NAME="DOCUMENT_TOP">&nbsp;</A>
<P align="center">
<FONT size="+1"><B>
UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
Washington, D.C. 20549</B>
</P>

<P>
<CENTER>
<FONT SIZE="+2" FACE="Arial"><B>FORM 6-K</B></FONT><BR>

</CENTER>
</P>

<P>
<CENTER>
<FONT size="+1">
REPORT OF FOREIGN PRIVATE ISSUER<BR>PURSUANT TO RULE 13a-16 OR 15d-16<BR>UNDER THE SECURITIES EXCHANGE ACT OF 1934
</FONT>
</CENTER>
</P>
<P>
<CENTER>
January 29, 2010
</CENTER>
</P>
<P>
<CENTER>
Commission File Number: 001-15128
</CENTER>
</P>
<!-- End Cover Page Header -->
<!-- Cover Page Registrant -->
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="CENTER" WIDTH="100%" COLSPAN="5">
	<FONT SIZE="+2"><B>United Microelectronics Corporation</B></FONT><BR>
	<FONT SIZE="-7">&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;</FONT>
    </TD>
  </TR>
  <TR>
    <TD VALIGN="CENTER" ALIGN="CENTER" WIDTH="100%" COLSPAN="5">
	<FONT SIZE="-1">(Translation of registrant&#146;s name into English)</FONT>
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="CENTER" WIDTH="100%" COLSPAN="5">
	&nbsp;
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="CENTER" WIDTH="100%" COLSPAN="5">
      <FONT FACE="Courier" SIZE="+0">No. 3 Li Hsin Road II<br>Science Park<br>Hsinchu, Taiwan, R.O.C.<br></FONT>
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="CENTER" WIDTH="100%" COLSPAN="5">
        <FONT SIZE="-7">&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;</FONT><BR>
	    <FONT SIZE="-1">(Address of principal executive office)</FONT>
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="CENTER" WIDTH="100%" COLSPAN="5">
	&nbsp;
    </TD>
  </TR>
</TABLE>
<!-- End Cover Page Registrant -->
<!-- Checkboxes Page -->
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="100%" COLSPAN="5">
	Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:&nbsp;&nbsp;[<FONT FACE="Courier">x</FONT>]&nbsp;Form 20-F&nbsp;&nbsp;&nbsp;&nbsp;[<FONT FACE="Courier">&nbsp;</FONT>]&nbsp;Form 40-F
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        &nbsp;
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):&nbsp;&nbsp;[<FONT FACE="Courier">&nbsp;</FONT>]
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        &nbsp;
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):&nbsp;&nbsp;[<FONT FACE="Courier">&nbsp;</FONT>]
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        &nbsp;
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934:&nbsp;&nbsp;[<FONT FACE="Courier">&nbsp;</FONT>]&nbsp;Yes&nbsp;&nbsp;&nbsp;&nbsp;[<FONT FACE="Courier">x</FONT>]&nbsp;No
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" COLSPAN="5" WIDTH="100%">
        &nbsp;
    </TD>
  </TR>
</TABLE>

<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="100%">
        If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):&nbsp;&nbsp;&nbsp;<FONT FACE="Courier"><U>&nbsp;n/a&nbsp;</U></FONT>
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="100%">
        &nbsp;
    </TD>
  </TR>
</TABLE>
<!-- End Checkboxes Page -->
<!-- HR Page Break  -->
<HR NOSHADE>
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
<!-- End HR Page Break --><!-- Report Page -->
<FONT SIZE="3">
<PRE>

</PRE>
</FONT>
<!-- End Report Page -->
<!-- Page Break  -->
<HR NOSHADE>
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
 <!-- Page Break  -->
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
<!-- End Page Break -->
<!-- Signatures Page Header -->
<FONT SIZE="+1">
<CENTER>
<B>SIGNATURES</B>
</CENTER>
</FONT>
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="100%">
       &nbsp;
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="100%">
       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.
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="100%">
       &nbsp;
    </TD>
  </TR>
</TABLE>
<!-- End Signatures Page Header -->
<!-- Signatures Page Details -->
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="100%">
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="40%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="4%%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="56%">
       United Microelectronics Corporation
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="40%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="4%%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="56%">
       &nbsp;
    </TD>
  </TR>

  <TR>
    <TD VALIGN="TOP" ALIGN="LEFT" WIDTH="40%">
       Date: 01/29/2010
    </TD>
    <TD VALIGN="TOP" ALIGN="LEFT" WIDTH="4%%">
       By:
    </TD>
    <TD VALIGN="TOP" ALIGN="LEFT" WIDTH="56%">
       Chitung Liu<BR><HR WIDTH="30%" NOSHADE>
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="40%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="4%%">
       Name:&nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="56%">
       Chitung Liu
    </TD>
  </TR>

  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="40%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="4%%">
       Title:
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="56%">
       Chief Financial Officer
    </TD>
  </TR>
  <TR>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="40%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="4%%">
       &nbsp;
    </TD>
    <TD VALIGN="BOTTOM" ALIGN="LEFT" WIDTH="56%">
       &nbsp;
    </TD>
  </TR>
</TABLE>
<!-- End Signatures Page Details -->
<!-- HR Page Break  -->
<HR NOSHADE>
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
<!-- End HR Page Break --><!-- Exhibit Index Header Page -->
<CENTER>
<FONT SIZE="+1"><B>
EXHIBIT&nbsp;INDEX
</B></FONT>
</CENTER>
<BR>
<CENTER>
<TABLE CELLSPACING="0" BORDER="0" CELLPADDING="0" WIDTH="60%">
  <TR VALIGN="BOTTOM">
    <TD NOWRAP ALIGN="LEFT" WIDTH="8%">
      <FONT SIZE="-1"><B>Exhibit No.</B></FONT>
    </TD>
    <TD WIDTH="15%">
      &nbsp;
    </TD>
    <TD NOWRAP ALIGN="LEFT" WIDTH="77%">
      <FONT SIZE="-1"><B>Description</B></FONT>
    </TD>
  </TR>
  <TR VALIGN="BOTTOM">
    <TD NOWRAP ALIGN="CENTER" WIDTH="8%">
      <HR SIZE="1" NOSHADE>
    </TD>
    <TD WIDTH="15%">
      &nbsp;
    </TD>
    <TD NOWRAP ALIGN="CENTER" WIDTH="77%">
      <HR ALIGN="LEFT" SIZE="1" WIDTH="88%" NOSHADE>
    </TD>
  </TR>
<!-- Exhibit Index Header Page -->
<!-- Exhibit Index Item -->
  <TR VALIGN="BOTTOM">
    <TD VALIGN="TOP" WIDTH="8%" nowrap>
      <FONT SIZE="-1">99<FONT>
    </TD>
    <TD WIDTH="15%">
       &nbsp;
    </TD>
    <TD ALIGN="LEFT" VALIGN="TOP" WIDTH="77%">
      <FONT SIZE="2">6K on 01/20/2010</FONT>
    </TD>
  </TR>
<!-- End Exhibit Index Item -->
<!-- ExhibitIndexFooter -->
  <TR VALIGN="BOTTOM">
    <TD VALIGN="TOP" WIDTH="8%" nowrap>
      &nbsp;
    </TD>
    <TD WIDTH="15%">
       &nbsp;
    </TD>
    <TD ALIGN="LEFT" VALIGN="TOP" WIDTH="77%">
      &nbsp;
    </TD>
  </TR>
</TABLE>
<!-- End ExhibitIndexFooter -->
<!-- HR Page Break  -->
<HR NOSHADE>
<DIV ALIGN="LEFT" STYLE="PAGE-BREAK-BEFORE:ALWAYS">
<!-- End HR Page Break --><!-- HTML Footer Page -->
</BODY>
</HTML>
<!-- End HTML Footer Page -->
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>exhibit1.htm
<DESCRIPTION>EX-99
<TEXT>
<!-- ExhibitContentHeader Page -->
<HTML>
<HEAD>
<TITLE>
Exhibit&nbsp;&nbsp;EX-99
</TITLE>
</HEAD>
<!-- End HTML Header Page -->
<!-- ExhibitContentPage -->

<BODY style="font-family: 'Times New Roman',Times,serif">


<P align="center" style="font-size: 10pt"><FONT style="font-size: 12pt"><B>Exhibit</B></FONT>



<P align="left" style="font-size: 12pt"><U>Exhibit</U> <U>Description</U>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.1</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2009/12/21: To announce the earthquake of December&nbsp;19, 2009 has no
significant impact on the Company&#146;s financial and business operation</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.2</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2009/12/23: Represent subsidiary United Lighting Opto-Electronic Inc. to
announce related materials on investment of mainland Chinese company</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.3</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2009/12/23: To announce related materials on acquisition of machinery and
equipment</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.4</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2009/12/28: To clarify reports on Economic Daily News on December&nbsp;27, 2009</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.5</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/05: To announce related materials on acquisition of machinery and
equipment</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.6</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/07: To clarify reports on Economic Daily News on January&nbsp;7, 2010</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.7</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/08 : The Company&#146;s impairment of assets by applying ROC SFAS No.&nbsp;34</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.8</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/11: UMC will attend investor conferences on 2010/01/12</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.9</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/11: To clarify reports on Economic Daily News on January&nbsp;11, 2010</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.10</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/18: To announce related materials on acquisition of machinery and
equipment</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.11</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/08:December Revenue</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">99.12</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Announcement on 2010/01/15: 1) the trading and pledge of UMC common shares by directors,
supervisors, executive officers and 10% shareholders of UMC; 2) the acquisition and
disposition of assets by UMC</TD>
</TR>


</TABLE>

<P align="center" style="font-size: 10pt; display: none">1
<!-- PAGEBREAK -->


<P><TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 12pt">



</TABLE>


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.1</B>



<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><B>The earthquake of December&nbsp;19, 2009 has no significant impact on the Company&#146;s financial and
business operation</B></TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>1.Date of occurrence of the event:2009/12/21</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>2.Company name: United Microelectronics Corp.</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>3.Relationship to the Company (please enter &#147;head office&#148; or &#147;affiliate company&#148;): Head office</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>4.Reciprocal shareholding ratios:N/A</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>5.Cause of occurrence:The earthquake of December&nbsp;19, 2009 has no significant impact on the
Company&#146;s financial and business operation.</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>6.Countermeasures: None</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>7.Any other matters that need to be specified: None</TD>
</TR>

</TABLE>


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.2</B>




<P align="left" style="margin-left:1%; font-size: 12pt"><B>Represent subsidiary United Lighting Opto-Electronic Inc. to announce related materials on
investment of mainland Chinese company</B>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>1.Date of occurrence of the event:2009/12/23</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>2.Method of the present increase (decrease)&nbsp;in investment:Invest mainland China company U-Lighting
Opto-Electronic (Shan Dong) Inc. by UNITED LIGHTING OPTO-ELECTRONIC INVESTMENT (HK)&nbsp;LIMITED</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>3.Transaction volume, price per unit, and total monetary amount of the transaction:USD$1,000,000</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>4.Company name of the invested mainland Chinese company:U-Lighting Opto-Electronic (Shan Dong) Inc.</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>5.Paid-in capital of said invested mainland Chinese company:USD$0 before capital increase</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>6.Amount of new capital increment currently planned by said invested mainland Chinese
company:USD$1,000,000</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>7.Main business items of said invested mainland Chinese company: LED lighting manufacturing and
sale</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>8.Type of CPA opinion issued for the financial statement of said invested mainland Chinese company
for the most recent fiscal year:NA</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>9.Net worth of said invested mainland Chinese company on the financial statement for the most
recent fiscal year:NA</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>10.Amount of profit/loss of said invested mainland Chinese company on the financial statement for
the most recent fiscal year:NA</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>11.Amount of actual investment to date in said invested mainland Chinese company:0</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>12.Counterparty to the transaction and its relationship to the Company: NA</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>13.Where the counterparty to the transaction is an actual related party, public announcement shall
also be made of the reason for choosing the related party as the counterparty and the identity
of the previous owner (including its relationship with the company and the trading
counterpart), the date of transfer, and the price:Not applicable</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>14.Where a person who owned the subject matter of the transaction within the past five years has
been an actual related party of the company, public announcement shall also be made of the
dates and prices of acquisition and disposal by the related party and such party&#146;s
relationship to the company at those times: Not applicable</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>15.Gain (or loss) on disposal: Not applicable</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>16.Terms of delivery or payment (including payment period and monetary amount), restrictive
covenants in the contract, and other important stipulations:One-time payment; None</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>17.The manner of deciding on this transaction, the reference basis for the decision on price and
the decision-making department:By Board of Directors.</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>18.Broker: None</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>19.Concrete purpose of the acquisition or disposal:Long-term investment</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>20.Do the directors have any objection to the present transaction?: None</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>21.Total amount of mainland China area investment (including the present investment) approved by
the Investment Commission to date: USD$0</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>22.Ratio of the total amount of investment (including the present investment) in the mainland China
area approved by the Investment Commission to date to the paid-in capital on the financial
statement for the most recent period:0%</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>23.Ratio of the total amount of investment (including the present investment) in the mainland China
area approved by the Investment Commission to date to the total assets on the financial
statement for the most recent period:0%</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>24.Ratio of the total amount of investment (including the present investment) in the mainland China
area approved by the Investment Commission to date to the shareholders&#146; equity on the
financial statement for the most recent period:0%</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>25.Total amount of actual investment in the mainland China area to date:USD$0</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>26.Ratio of the total amount of actual investment in the mainland China area to date to the paid-in
capital on the financial statement for the most recent period: 0%</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>27.Ratio of the total amount of actual investment in the mainland China area to date to the total
assets on the financial statement for the most recent period:0%</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>28.Ratio of the total amount of actual investment in the mainland China area to date to the
shareholders&#146; equity on the financial statement for the most recent period: 0%</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>29.Amount of recognized profits and losses on investment in the mainland China area for the most
recent three fiscal years:USD$0</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>30.Amount of profit remitted back to Taiwan for the most recent three fiscal years: USD$0</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>31.Has the CPA issued an opinion on the unreasonableness of the price of the current transaction?:
None</TD>
</TR>

</TABLE>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>32.Any other matters that need to be specified:None</TD>
</TR>

</TABLE>


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.3</B>



<P align="center" style="font-size: 12pt"><B>To announce related materials on acquisition of machinery and equipment</B>



<P align="left" style="font-size: 12pt">1.Name and nature of the subject matter (e.g.land located at Sublot XX, Lot XX, North District,
Taichung City):Machinery and equipment
<BR>
2.Date of the occurrence of the event: 2009/09/10~2009/12/23
<BR>
3.Transaction volume (e.g.XX square meters, equivalent to XX p&#146;ing), unit price, total transaction
price:Transaction volume:one batch;average unit price: $529,330,024 NTD;total transaction price:
$529,330,024 NTD
<BR>
4.Counterparty to the trade and its relationship with the company (if the trading counterpart is a
natural person and is not an actual related party of the Company, the name of the trading
counterpart is not required to be disclosed): Applied Materials South East; non-related party
transaction
<BR>
5.Where the counterpart to the trade is an actual related party, a public announcement shall also
include the reason for choosing the related party as trading counterpart and the identity of the
previous owner (including its relationship with the company and the trading counterpart), price of
transfer and the date of acquisition:Not applicable
<BR>
6.Where a person who owned the property within the past five years has been an actual related
person of the company, a public announcement shall also include the dates and prices of acquisition
and disposal by the related person and the person&#146;s relationship to the company at those times:Not
applicable
<BR>
7.Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets)
(where originally deferred, the status or recognition shall be stated and explained):Not applicable
<BR>
8.Terms of delivery or payment (including payment period and monetary amount):1)90% paid upon
shipment;10% paid after acceptance 2)100% paid after acceptance
<BR>
9.The manner of deciding on this transaction (such as tender invitation, price comparison, or price
negotiation), the reference basis for the decision on price and the decision-making
department:transaction:price negotiation; the reference basis for the decision on price:market
price. The decision-making department:the Selection Meeting
<BR>
10.Name of the professional appraisal institution and its appraisal amount:Not applicable
<BR>
11.Reason for any significant discrepancy with the transaction amount, and opinion of the
certifying CPA:Not applicable
<BR>
12.Is the appraisal report price a limited price or specific price?:Not applicable
<BR>
13.Has an appraisal report not yet been obtained?:Not applicable
<BR>
14.Reason an appraisal report has not yet been obtained:Not applicable
<BR>
15.Broker and broker&#146;s fee:Not applicable
<BR>
16.Concrete purpose or use of the acquisition or disposition:To produce integrated circuits
<BR>
17.Do the directors have any objection to the present transaction?:No
<BR>
18.Any other matters that need to be specified:None


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.4</B>



<P align="center" style="font-size: 12pt"><B>To clarify reports on Economic Daily News on December&nbsp;27, 2009</B>



<P align="left" style="font-size: 12pt">1.Name of the reporting media: Economic Daily News, A3
<BR>
2.Date of the report:2009/12/27
<BR>
3.Content of the report: UMC spends NTD10&nbsp;billion to invest green energy in Mainland China
<BR>
4.Summary of the information provided by investors: None
<BR>
5.Company&#146;s explanation of the reportage or provided information:The Company here to clarify that
the news was derived from speculation. All of the Company&#146;s investment plans to Mainland China have
followed related government regulations and have been published on MOPS.
<BR>
6.Countermeasures: None
<BR>
7.Any other matters that need to be specified: None


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.5</B>



<P align="center" style="font-size: 12pt"><B>To announce related materials on acquisition of machinery and equipment</B>



<P align="left" style="font-size: 12pt">1.Name and nature of the subject matter (e.g.land located at Sublot XX, Lot XX, North District,
Taichung City):Machinery and equipment
<BR>
2.Date of the occurrence of the event: 2009/09/16~2010/01/05
<BR>
3.Transaction volume (e.g.XX square meters, equivalent to XX p&#146;ing), unit price, total transaction
price:Transaction volume:one batch;average unit price: $ 578,709,775 NTD;total transaction price:
$ 578,709,775 NTD
<BR>
4.Counterparty to the trade and its relationship with the company (if the trading counterpart is a
natural person and is not an actual related party of the Company, the name of the trading
counterpart is not required to be disclosed): KLA-TENCOR CORPORATION.; non-related party
transaction
<BR>
5.Where the counterpart to the trade is an actual related party, a public announcement shall also
include the reason for choosing the related party as trading counterpart and the identity of the
previous owner (including its relationship with the company and the trading counterpart), price of
transfer and the date of acquisition:Not applicable
<BR>
6.Where a person who owned the property within the past five years has been an actual related
person of the company, a public announcement shall also include the dates and prices of acquisition
and disposal by the related person and the person&#146;s relationship to the company at those times:Not
applicable
<BR>
7.Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets)
(where originally deferred, the status or recognition shall be stated and explained):Not applicable
<BR>
8.Terms of delivery or payment (including payment period and monetary amount):1)90% paid upon
shipment;10% paid after acceptance 2)100% paid after acceptance
<BR>
9.The manner of deciding on this transaction (such as tender invitation, price comparison, or price
negotiation), the reference basis for the decision on price and the decision-making
department:transaction:price negotiation; the reference basis for the decision on price:market
price. The decision-making department:the Selection Meeting
<BR>
10.Name of the professional appraisal institution and its appraisal amount:Not applicable
<BR>
11.Reason for any significant discrepancy with the transaction amount, and opinion of the
certifying CPA:Not applicable
<BR>
12.Is the appraisal report price a limited price or specific price?:Not applicable
<BR>
13.Has an appraisal report not yet been obtained?:Not applicable
<BR>
14.Reason an appraisal report has not yet been obtained:Not applicable
<BR>
15.Broker and broker&#146;s fee:Not applicable
<BR>
16.Concrete purpose or use of the acquisition or disposition:To produce integrated circuits
<BR>
17.Do the directors have any objection to the present transaction?:No
<BR>
18.Any other matters that need to be specified:None


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.6</B>



<P align="left" style="font-size: 12pt"><B>To clarify reports on Economic Daily News on January&nbsp;7, 2010</B>
<BR>
1.Name of the reporting media: Economic Daily News, A2
<BR>
2.Date of the report:2010/01/07
<BR>
3.Content of the report: Rumor on ATIC&#146;s acquiring UMC
<BR>
4.Summary of the information provided by investors: None
<BR>
5.Company&#146;s explanation of the reportage or provided information:The Company can not comment on
media&#146;s speculative reports.
<BR>
6.Countermeasures: None
<BR>
7.Any other matters that need to be specified: None


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.7</B>



<P align="center" style="font-size: 12pt"><B>The Company&#146;s impairment of assets by applying ROC SFAS No.&nbsp;34</B>



<P align="left" style="font-size: 12pt">1.Date of occurrence of the event:2010/01/08
<BR>
2.Company name:United Microelectronics Corp.
<BR>
3.Relationship to the Company (please enter &#147;head office&#148; or &#147;affiliate company&#148;):head office
<BR>
4.Reciprocal shareholding ratios:N/A
<BR>
5.Cause of occurrence:none
<BR>
6.Countermeasures:none
<BR>
7.Any other matters that need to be specified:(1)Following the impairment test pursuant to ROC SFAS
No.&nbsp;34, the companyhas decided to recognize an other-than-temporary impairment loss, totaling
NTD300&nbsp;millions from holdings of financial assets measured at cost , Taiwan High Speed Rail
Corporation Stock-Preferred stocks. (2)This is a non-cash impairment loss, and does not have any
impact on the working-capital and cash flow of the company. (3)All figures are unaudited, and have
not yet been reviewed by an independent accountant.


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.8</B>



<P align="center" style="font-size: 12pt"><B>UMC will attend investor conferences on2010/01/12</B>



<P align="left" style="font-size: 12pt">1.Date of the investor/press conference:2010/01/12
<BR>
2.Location of the investor/press conference: Beijing, China
<BR>
3.Financial and business related information:The Company will attend the Access China Conference
held by Deutsche Bank from 2010/01/12 to 2010/01/13 in Beijing, China.
<BR>
4.Any other matters that need to be specified:Please refer to MOPS or Company website for more
information.


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.9</B>



<P align="left" style="font-size: 12pt"><B>To clarify reports on Economic Daily News on January&nbsp;11, 2010</B>
<BR>
1.Name of the reporting media: Economic Daily News, A1
<BR>
2.Date of the report:2010/01/11
<BR>
3.Content of the report: UMC intends to take over ProMOS 12&#148; FAB in Hsinchu Science Park
<BR>
4.Summary of the information provided by investors: None
<BR>
5.Company&#146;s explanation of the reportage or provided information:The Company can not comment on
media&#146;s speculative reports.
<BR>
6.Countermeasures: None
<BR>
7.Any other matters that need to be specified: None


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.10</B>



<P align="center" style="font-size: 12pt"><B>To announce related materials on acquisition of machinery and equipment</B>



<P align="left" style="font-size: 12pt">1.Name and nature of the subject matter (e.g.land located at Sublot XX, Lot XX, North District,
Taichung City):Machinery and equipment
<BR>
2.Date of the occurrence of the event: 2009/11/30~2010/01/18
<BR>
3.Transaction volume (e.g.XX square meters, equivalent to XX p&#146;ing), unit price, total transaction
price:Transaction volume:one batch;average unit price: $ 537,391,220 NTD;total transaction price:
$ 537,391,220 NTD
<BR>
4.Counterparty to the trade and its relationship with the company (if the trading counterpart is a
natural person and is not an actual related party of the Company, the name of the trading
counterpart is not required to be disclosed): TOKYO ELECTRON LIMITED; non-related party transaction
<BR>
5.Where the counterpart to the trade is an actual related party, a public announcement shall also
include the reason for choosing the related party as trading counterpart and the identity of the
previous owner (including its relationship with the company and the trading counterpart), price of
transfer and the date of acquisition:Not applicable
<BR>
6.Where a person who owned the property within the past five years has been an actual related
person of the company, a public announcement shall also include the dates and prices of acquisition
and disposal by the related person and the person&#146;s relationship to the company at those times:Not
applicable
<BR>
7.Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets)
(where originally deferred, the status or recognition shall be stated and explained):Not applicable
<BR>
8.Terms of delivery or payment (including payment period and monetary amount):1)90% paid upon
shipment;10% paid after acceptance 2)100% paid after acceptance
<BR>
9.The manner of deciding on this transaction (such as tender invitation, price comparison, or price
negotiation), the reference basis for the decision on price and the decision-making
department:transaction:price negotiation; the reference basis for the decision on price:market
price. The decision-making department:the Selection Meeting
<BR>
10.Name of the professional appraisal institution and its appraisal amount:Not applicable
<BR>
11.Reason for any significant discrepancy with the transaction amount, and opinion of the
certifying CPA:Not applicable
<BR>
12.Is the appraisal report price a limited price or specific price?:Not applicable
<BR>
13.Has an appraisal report not yet been obtained?:Not applicable
<BR>
14.Reason an appraisal report has not yet been obtained:Not applicable
<BR>
15.Broker and broker&#146;s fee:Not applicable
<BR>
16.Concrete purpose or use of the acquisition or disposition:To produce integrated circuits
<BR>
17.Do the directors have any objection to the present transaction?:No
<BR>
18.Any other matters that need to be specified:None


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.11</B>



<P align="center" style="font-size: 12pt"><B>United Microelectronics Corporation</B><BR>
January&nbsp;8, 2010



<P align="left" style="font-size: 12pt">This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3)
Endorsements and guarantees 4) Financial derivative transactions for the period of December&nbsp;2009.


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Sales volume (NT$ Thousand)</TD>
</TR>

</TABLE>

<DIV align="center">
<TABLE style="font-size: 12pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="6%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="6%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="6%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="6%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
</TR>
<TR style="font-size: 12pt" valign="bottom">
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Period</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Items</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>2009</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>2008</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Changes</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>%</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom" style="font-size: 12pt">
    <TD nowrap colspan="3" align="center" valign="top"><I>December</I>
</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><I>Invoice amount</I>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">6,816,187</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">3,295,033</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">3,521,154</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">106.86</TD>
    <TD nowrap valign="top">%</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top"><I>2009</I></TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><I>Invoice amount</I>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">68,007,459</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">72,656,319</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">-4,648,860</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">-6.40</TD>
    <TD nowrap valign="top">%</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD nowrap colspan="3" align="center" valign="top"><I>December</I>
</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><I>Net sales</I>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">9,292,732</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4,609,683</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4,683,049</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">101.59</TD>
    <TD nowrap valign="top">%</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top"><I>2009</I></TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><I>Net sales</I>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">88,617,572</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">92,530,051</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">-3,912,479</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">-4.23</TD>
    <TD nowrap valign="top">%</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Funds lent to other parties (NT$ Thousand)</TD>
</TR>

</TABLE>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="50%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="14%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="14%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B><I>Balance as of period end</I></B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>This Month</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Last Month</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Limit of lending</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom" style="font-size: 10pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><FONT style="font-size: 12pt"><I>UMC</I></FONT></DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">25,975,543</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><FONT style="font-size: 12pt"><I>UMC&#146;s subsidiaries</I></FONT></DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">3)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Endorsements and guarantees (NT$ Thousand)</TD>
</TR>

</TABLE>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="50%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="14%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="14%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Change in This Month</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Balance as of period end</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><B>Limit of endorsements</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom" style="font-size: 10pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>UMC</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">51,951,085</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><FONT style="font-size: 10pt"><I>UMC&#146;s subsidiaries</I></FONT></DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD colspan="5" align="left"><FONT style="font-size: 10pt"><I>UMC endorses for subsidiaries</I></FONT><BR></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><I><FONT style="font-size: 10pt"></I><FONT style="font-size: 12pt">0</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD colspan="5" align="left"><FONT style="font-size: 10pt"><I>UMC&#146;s subsidiaries endorse for UMC</I></FONT><BR></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><I><FONT style="font-size: 10pt"></I><FONT style="font-size: 12pt">0</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD colspan="5" align="left"><FONT style="font-size: 10pt"><I>UMC endorses for PRC companies</I></FONT><BR></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><I><FONT style="font-size: 10pt"></I><FONT style="font-size: 12pt">0</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD colspan="5" align="left"><FONT style="font-size: 10pt"><I>UMC&#146;s subsidiaries endorse for PRC companies</I></FONT><BR></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><I><FONT style="font-size: 10pt"></I><FONT style="font-size: 12pt">0</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right"><FONT style="font-size: 12pt"></FONT></TD>
    <TD align="right"><FONT style="font-size: 12pt">0</FONT></TD>
    <TD><FONT style="font-size: 12pt"></FONT></TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD colspan="5" align="left"><FONT style="font-size: 12pt">&nbsp;</FONT><BR></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">4)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Financial derivatives transactions</TD>
</TR>

</TABLE>


<P align="left" style="font-size: 12pt">a Hedging purpose : NT$ thousand

<DIV align="center">
<TABLE style="font-size: 12pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="59%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="6%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
</TR>
<TR style="font-size: 12pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><I>Financial instruments</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000">Forwards</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000">IRS</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Deposit Paid</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Royalty Income (Paid)</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Unwritten-off Trading
Contracts</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">8,525,310</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">7,500,000</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Fair Value</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">75,366</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">88,410</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Net Profit from Fair Value</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">15,616</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">8,049</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Written-off Trading Contracts</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">57,393,721</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">7,500,000</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Realized profit (loss)</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">147,692</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="right">&nbsp;</TD>
    <TD align="right">(33,190</TD>
    <TD nowrap>)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="left" style="font-size: 12pt">b Trading purpose :</FONT><FONT style="font-size: 10pt"> </FONT><FONT style="font-size: 12pt">NT$ thousand
</FONT>
<DIV align="center">
<TABLE style="font-size: 12pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="92%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 12pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><I>Financial instruments</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000">Credit-linked Deposits</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Deposit Paid</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Unwritten-off Trading Contracts</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Net Profit from Market Value</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Written-off Trading Contracts</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="font-size: 12pt">
    <TD><DIV style="margin-left:10px; text-indent:-10px"><I>Realized profit (loss)</I></DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0</TD>
    <TD>&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt; display: none">2
<!-- PAGEBREAK -->


<P align="right" style="font-size: 12pt"><B>Exhibit&nbsp;99.12</B>



<P align="center" style="font-size: 12pt"><B>United Microelectronics Corporation</B><BR>
For the month of December, 2009



<P align="left" style="font-size: 12pt">This is to report 1) the trading of directors, supervisors, executive officers and 10% shareholders
of United Microelectronics Corporation (&#147;UMC&#148;) (NYSE: UMC); 2) the pledge and clear of pledge of
UMC common shares by directors, supervisors, executive officers and 10% shareholders of UMC; 3) the
acquisition assets by UMC; 4) the disposition of assets by UMC for the month of December, 2009.


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 12pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The trading of directors, supervisors, executive officers and 10% shareholders</TD>
</TR>

</TABLE>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="20%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>Number of shares</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>Number of shares held as</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>held as of</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>of</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="left" colspan="3" style="border-bottom: 1px solid #000000"><I>Title</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>Name</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>November 30, 2009</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>December 31, 2009</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>Changes</I></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<!-- End Table Body -->
</TABLE>
</DIV>


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right"><FONT style="font-size: 12pt">2)</FONT></TD>
    <TD width="1%">&nbsp;</TD>
    <TD><FONT style="font-size: 12pt">The pledge and clear of pledge of UMC common shares by directors, supervisors, executive
officers and 10% shareholders:</FONT></TD>
</TR>

</TABLE>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="95%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="20%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="7%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>Number of shares</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>Number of shares held as</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>held as of</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><I>of</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="left" colspan="3" style="border-bottom: 1px solid #000000"><I>Title</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>Name</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>November 30, 2009</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>December 31, 2009</I></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000"><I>Changes</I></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt; display: none">3




<!-- v.121908 -->
</BODY>

<!-- End ExhibitContentPage -->
<!-- ExhibitContentFooter Page -->
</HTML>
<!-- ExhibitContentFooter Page -->
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
