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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001193125-06-110838.txt : 20060512
<SEC-HEADER>0001193125-06-110838.hdr.sgml : 20060512
<ACCEPTANCE-DATETIME>20060512162413
ACCESSION NUMBER:		0001193125-06-110838
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20060512
DATE AS OF CHANGE:		20060512

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CECO ENVIRONMENTAL CORP
		CENTRAL INDEX KEY:			0000003197
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFYING EQUIP [3564]
		IRS NUMBER:				132566064
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-130294
		FILM NUMBER:		06835155

	BUSINESS ADDRESS:	
		STREET 1:		3120 FORRER STREET
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45209
		BUSINESS PHONE:		4165936543

	MAIL ADDRESS:	
		STREET 1:		505 UNIVERSITY AVENUE
		STREET 2:		SUITE 1400
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5G 1X3

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	API ENTERPRISES INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALARM PRODUCTS INTERNATIONAL INC
		DATE OF NAME CHANGE:	19851210
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>d424b3.htm
<DESCRIPTION>SUPPLEMENT #2
<TEXT>
<HTML><HEAD>
<TITLE>Supplement #2</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE">

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT FACE="Times New Roman" SIZE="2">Filed pursuant to 424(b)(3) </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT
FACE="Times New Roman" SIZE="2">Registration #333-130294 </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">SUPPLEMENT NO. 2 </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"
ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">DATED MAY 12, 2006 </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">TO THE PROSPECTUS DATED MARCH 31, 2006 </FONT></P> <P
STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">OF CECO ENVIRONMENTAL CORP. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">Up to 2,392,334
Common Shares </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">We are providing this Supplement No.&nbsp;2 to you in order to supplement our prospectus. This Supplement updates
information in the &#147;Selling Stockholders&#148; section of our prospectus. This Supplement No.&nbsp;2 supplements, modifies or supercedes certain information contained in our prospectus dated March&nbsp;31, 2006, as amended by Supplement
No.&nbsp;1 dated April&nbsp;12, 2006 and must be read in conjunction with our prospectus as amended. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">The purpose of this Prospectus
Supplement is to amend the &#147;Selling Stockholders&#148; section beginning on page 8 of the Prospectus in order to reflect the transfer of Investor Warrants by Robert Geras, a selling stockholder named in the original prospectus, to Allen I.
Kutchins and the substitution of Allen I. Kutchins as a selling stockholder. Except as amended by the Prospectus Supplement, the &#147;Selling Stockholder&#148; section of the Prospectus is not affected by this Prospectus Supplement. </FONT></P> <P
STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">Our shares of common stock are traded on the Nasdaq SmallCap Market under the symbol CECE. On May&nbsp;10, 2006, the closing sales price of our shares of
common stock on Nasdaq was $10.00 per share. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" ALIGN="center">

<TR>
<TD WIDTH="100%"></TD></TR>
<TR>
<TD VALIGN="bottom"> <P STYLE="margin-right:0px;margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="2"><B>Consider carefully the risk of factors beginning on page 3 in the Prospectus before investing
in our securities.</B></FONT></P></TD></TR>
</TABLE> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT FACE="Times New Roman" SIZE="2"><B>This Prospectus Supplement should be read in conjunction with the Prospectus as amended and this Prospectus
Supplement is qualified in its entirety by reference to the Prospectus as amended except to the extent that the information contained herein modifies or supersedes the information contained in the Prospectus. Capitalized terms used in this
Prospectus Supplement and not otherwise defined herein shall have the same meaning specified in the Prospectus. </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT FACE="Times New Roman" SIZE="2"><B>Neither the Securities and Exchange
Commission nor any state securities commission has approved or disapproved of these securities or passed on the adequacy or accuracy of the Prospectus and this Prospectus Supplement. Any representation to the contrary is a criminal offense.
</B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2"><B>The date of this prospectus supplement is May&nbsp;12, 2006. </B></FONT></P>

<p Style='page-break-before:always'>
<HR  SIZE="3" COLOR="#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">SUBSTITUTION OF SELLING STOCKHOLDERS </FONT></P> <P
STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">The reference to Robert Geras in the selling stockholder table in the section of the Prospectus entitled <I>&#147;Selling Stockholders&#148;
</I>beginning on page 8 of the Prospectus is deleted. The table below sets forth, with respect to the substituted selling stockholder for Robert Geras, as of the date of this prospectus supplement its name and certain beneficial ownership
information. Robert Geras transferred all of his Investor Warrants for 70,000 shares of Common Stock to Allen I. Kutchins. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">Percentage
beneficial ownership is based on 11,459,447 shares of common stock outstanding as of May&nbsp;9, 2006. Beneficial ownership is calculated based on SEC requirements. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" ALIGN="center">

<TR>
<TD WIDTH="69%"></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="4%"></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="3" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Shares<BR>Beneficially&nbsp;Owned<BR>Before&nbsp;Offering</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ROWSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Number&nbsp;of<BR>Shares<BR>Being&nbsp;Offered</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="3" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Shares<BR>Beneficially&nbsp;Owned<BR>After Offering</B></FONT></TD></TR>
<TR>
<TD VALIGN="bottom"> <P STYLE="margin-right:0px;margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Selling Stockholders</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Number</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Percent</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Number<SUP>1</SUP></B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Percent</B></FONT></TD></TR>
<TR>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Allen I. Kutchins</FONT></P> <P
STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">1101 Perimeter Drive</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT
FACE="Times New Roman" SIZE="2">Suite 760</FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Schaumburg, Illinois 60173</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">70,000</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">0.6%</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">70,000</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">0</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">*</FONT></TD></TR>
</TABLE> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">*</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">Less than 1% </FONT></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2"></FONT><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP>1</SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Assumes sale of all shares of common stock offered hereby. </FONT></TD></TR></TABLE>
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