<SEC-DOCUMENT>0001144204-13-005718.txt : 20130204
<SEC-HEADER>0001144204-13-005718.hdr.sgml : 20130204
<ACCEPTANCE-DATETIME>20130204144845
ACCESSION NUMBER:		0001144204-13-005718
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20130204
DATE AS OF CHANGE:		20130204

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SILICON LABORATORIES INC
		CENTRAL INDEX KEY:			0001038074
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				742793174
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-60853
		FILM NUMBER:		13569566

	BUSINESS ADDRESS:	
		STREET 1:		400 W CESAR CHAVEZ
		CITY:			AUSTIN
		STATE:			TX
		ZIP:			78701
		BUSINESS PHONE:		5124168500

	MAIL ADDRESS:	
		STREET 1:		400 W CESAR CHAVEZ
		CITY:			AUSTIN
		STATE:			TX
		ZIP:			78701

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLAIR WILLIAM & CO/IL
		CENTRAL INDEX KEY:			0000902367
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				362214610
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		222 WEST ADAMS ST
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606-5312
		BUSINESS PHONE:		3122361600

	MAIL ADDRESS:	
		STREET 1:		222 WEST ADAMS
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>v333496_sc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SCHEDULE 13G*</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Rule 13d-102)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION TO BE INCLUDED IN STATEMENTS
FILED PURSUANT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>TO &sect; 240.13d-1(b), (c), AND (d)
AND AMENDMENTS THERETO FILED </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PURSUANT TO &sect; 240.13d-2</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Amendment No. _10__)*</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; border-bottom: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">Silicon Laboratories, Inc.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">(Name of Issuer)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">Common Stock</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">(Title of Class of Securities)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">826919102</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">(CUSIP Number)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">December 31, 2012</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">(Date of Event Which Requires Filing of the Statement)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Check the appropriate box to designate
the rule pursuant to which this Schedule is filed:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">x</FONT>&#9;Rule 13d-1(b)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">o</FONT>&#9;Rule 13d-1(c)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">o</FONT>&#9;Rule 13d-1(d)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">*The remainder of this cover page shall be
filled out for a reporting person&rsquo;s initial filing on this form with respect to the subject class of securities, and for
any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">The information required in the remainder
of this cover page shall not be deemed to be &ldquo;filed&rdquo; for the purpose of Section 18 of the Securities Exchange Act of
1934 (&ldquo;Act&rdquo;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions
of the Act (however, see the Notes).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 34%; border: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Cusip No. 826919102</TD>
    <TD STYLE="width: 33%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center"><B>13G</B></TD>
    <TD STYLE="width: 33%; border: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Page 2 of 5 Pages</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"> </FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; border-top: windowtext 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">1.</P></TD>
    <TD STYLE="width: 93%; border-top: windowtext 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">NAME OF REPORTING PERSONS</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">William Blair &amp; Company, LLC
</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; border-top-color: black; border-top-width: 1pt; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">2.</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(see instructions)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT STYLE="font-family: Wingdings">o</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT STYLE="font-family: Wingdings">o</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; border-top-color: black; border-top-width: 1pt; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">3.</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC USE ONLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: windowtext 1pt solid; border-left: black 1pt solid; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">4.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.35pt; padding-left: 6.35pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CITIZENSHIP OR PLACE OF ORGANIZATION</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">222 W. ADAMS STREET, CHICAGO, IL 60606 USA</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD ROWSPAN="4" STYLE="width: 30%; border-right: windowtext 1pt solid; border-left: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">NUMBER OF</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SHARES</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">BENEFICIALLY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">OWNED BY</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">EACH</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">REPORTING</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PERSON</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">WITH</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="width: 7%; border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">5.</P></TD>
    <TD STYLE="width: 63%; border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">2,142,114</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">6.</P></TD>
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED VOTING POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">7.</P></TD>
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SOLE DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">2,142,114</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">8.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="border-right: windowtext 1pt solid; padding-right: 6.6pt; padding-left: 6.6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SHARED DISPOSITIVE POWER</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">0</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 7%; border: windowtext 1pt solid; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">9.</P></TD>
    <TD STYLE="width: 93%; border-top: windowtext 1pt solid; border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; border-left-color: windowtext; border-left-width: 1pt; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">2,142,114</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; border-left: windowtext 1pt solid; border-top-color: windowtext; border-top-width: 1pt; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">10.</P></TD>
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">CHECK IF THE AGGREGATE AMOUNT
        IN ROW (9) EXCLUDES CERTAIN SHARES</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">(SEE INSTRUCTIONS)</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0; text-align: right">o</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; border-left: windowtext 1pt solid; border-top-color: windowtext; border-top-width: 1pt; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.5in; text-indent: -0.5in">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">11.</P></TD>
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5.15%</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; border-left: windowtext 1pt solid; border-top-color: windowtext; border-top-width: 1pt; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">12.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD>
    <TD STYLE="border-right: windowtext 1pt solid; border-bottom: windowtext 1pt solid; padding-right: 6.7pt; padding-left: 6.7pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">BD, IA</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 108.25pt; text-indent: -108.25pt">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 108.25pt; text-indent: -108.25pt">&nbsp;</P></TD></TR>
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    <TD STYLE="width: 34%; border: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Cusip No. 826919102</TD>
    <TD STYLE="width: 33%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;<B>13G</B></TD>
    <TD STYLE="width: 33%; border: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Page 3  of 5
    Pages</TD></TR>
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    <TD STYLE="width: 10%; padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 1(a).</TD>
    <TD STYLE="width: 90%; padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Name of Issuer:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">Silicon Laboratories, Inc.</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 1(b).</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Address of Issuer&rsquo;s Principal Executive Offices:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">400 West Cesar Chavez, Austin, TX 78701, United States</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 2(a).</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Name of Person Filing:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">WILLIAM BLAIR &amp; COMPANY, LLC</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 2(b).</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Address of Principal Business Office or, if none, Residence:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">222 WEST ADAMS STREET, CHICAGO, IL 60606</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 2(c).</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Citizenship:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">USA</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 2(d).</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Title of Class of Securities:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">COMMON STOCK</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 2(e).</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">CUSIP Number:</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">826919102</TD>
    </TR>
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    <TD STYLE="padding-right: 0; padding-left: 0; text-align: justify; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: justify; font-weight: bold">&nbsp;</TD>
    </TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: justify; font-weight: bold">Item 3.</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; text-align: justify; font-weight: bold">If this statement is filed pursuant to &sect;&sect; 240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a:</TD>
    </TR>
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    <TD STYLE="width: 10%; text-align: left; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="width: 5%; text-align: left; text-indent: 0in; layout-grid-mode: line">(a)</TD>
    <TD STYLE="width: 5%; text-align: left; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">x</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line; width: 60%">Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o);</TD></TR>
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    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(b)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(c)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(d)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(e)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">x</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">An investment adviser in accordance with &sect; 240.13d-1(b)(1)(ii)(E);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(f)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">An employee benefit plan or endowment fund in accordance with &sect; 240.13d-1(b)(1)(ii)(F);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(g)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">A parent holding company or control person in accordance with &sect; 240.13d-1(b)(1)(ii)(G);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(h)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(i)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act (15 U.S.C. 80a-3);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(j)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">A non-U.S. institution in accordance with &sect; 240.13d-1(b)(1)(ii)(J);</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; layout-grid-mode: line">(k)</TD>
    <TD STYLE="text-align: justify; text-indent: 0in; font-family: Wingdings; layout-grid-mode: line">o</TD>
    <TD STYLE="text-align: left; text-indent: 0in; layout-grid-mode: line">Group, in accordance with &sect; 240.13d-1(b)(1)(ii)(K).</TD></TR>
</TABLE>
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    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; width: 10%">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; width: 90%">If filing as a non-U.S. institution in accordance with
&sect; 240.13d-1(b)(1)(ii)(J), please specify the type of institution: ____________.</TD>
    </TR>
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    <TD STYLE="width: 34%; border: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Cusip No. 826919102</TD>
    <TD STYLE="width: 33%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;<B>13G</B></TD>
    <TD STYLE="width: 33%; border: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Page 4  of 5
    Pages</TD></TR>
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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-right: 0; padding-left: 0; text-align: justify; font-size: 10pt; font-weight: bold">Item 4.</TD>
    <TD STYLE="width: 90%; padding-right: 0; padding-left: 0; text-align: justify; font-size: 10pt; font-weight: bold">Ownership:</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; layout-grid-mode: line"></TD>
    <TD STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; layout-grid-mode: line">Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.</TD></TR>
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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(a)</TD><TD STYLE="text-align: left; padding-right: 0; padding-left: 0">Amount beneficially owned: 2,142,114</TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(b)</TD><TD STYLE="text-align: left; padding-right: 0; padding-left: 0">Percent of class: 5.15%</TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(c)</TD><TD STYLE="text-align: left; padding-right: 0; padding-left: 0">Number of shares as to which the person has:</TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1.5in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(i)</TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">Sole power to vote or to direct the vote: 2,142,114</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1.5in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(ii)</TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">Shared power to vote or to direct the vote: 0</TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1.5in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(iii)</TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">Sole power to dispose or to direct the disposition of: 2,142,114</TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 1.5in; padding-right: 0; padding-left: 0"></TD><TD STYLE="width: 0.5in; padding-right: 0; padding-left: 0">(iv)</TD><TD STYLE="text-align: justify; padding-right: 0; padding-left: 0">Shared power to dispose or to direct the disposition of: 0</TD></TR></TABLE>

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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-right: 0; padding-left: 0; text-align: justify; font-weight: bold">Item 5.</TD>
    <TD STYLE="width: 90%; padding-right: 0; padding-left: 0; text-align: justify; font-weight: bold">Ownership of Five Percent or Less of a Class:</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following <FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT>.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 6.</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Ownership of More Than Five Percent on Behalf of Another Person:</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">N/A</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 7.</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company:</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">N/A</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 8.</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Identification and Classification of Members of the Group:</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">N/A</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 9.</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Notice of Dissolution of Group:</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">N/A</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Item 10.</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line; font-weight: bold">Certifications:</TD></TR>
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    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="padding-right: 0; padding-left: 0; layout-grid-mode: line">N/A</TD></TR>
</TABLE>

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    <TD STYLE="width: 34%; border: windowtext 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Cusip No. 826919102</TD>
    <TD STYLE="width: 33%; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt; text-align: center">&nbsp;<B>13G</B></TD>
    <TD STYLE="width: 33%; border: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; font-size: 10pt">Page&nbsp;5   of 5
    Pages</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in"><B>SIGNATURE</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left; text-indent: 0in">After reasonable inquiry
and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.</P>

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    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 35%">&nbsp;</TD>
    <TD STYLE="width: 10%">&nbsp;</TD>
    <TD STYLE="width: 5%">Date:</TD>
    <TD STYLE="width: 35%; padding-left: 4pt"><P STYLE="margin: 0pt 0">February 4, 2013</P>


</TD>
    <TD STYLE="width: 10%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD NOWRAP STYLE="padding-left: 4pt">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: white 3pt solid">By:</TD>
    <TD NOWRAP STYLE="border-bottom: black 1.5pt solid; padding-left: 4pt">/s/ Michelle R. Seitz</TD>
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD NOWRAP STYLE="padding-left: 4pt">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: white 3pt solid">Name:</TD>
    <TD NOWRAP STYLE="border-bottom: black 1.5pt solid; padding-left: 4pt">Michelle R. Seitz</TD>
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD NOWRAP STYLE="padding-left: 4pt">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: white 3pt solid">Title:</TD>
    <TD NOWRAP STYLE="border-bottom: black 1.5pt solid; padding-left: 4pt">Principal, Head of Investment Management</TD>
    <TD STYLE="border-bottom: white 3pt solid">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD NOWRAP STYLE="padding-left: 4pt">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The original statement shall be signed by each person on whose
behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized
representative other than an executive officer or general partner of the filing person, evidence of the representative&rsquo;s
authority to sign on behalf of such person shall be filed with the statement, <I>Provided, however</I>, that a power of attorney
for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each
person who signs the statement shall be typed or printed beneath his signature.</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0"><B>Attention: Intentional
misstatements or omissions of fact constitute Federal criminal violations</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0">(<I>see</I> 18 U.S.C.
1001).</P>

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