<SEC-DOCUMENT>0001193125-17-082021-index.html : 20170314
<SEC-HEADER>0001193125-17-082021.hdr.sgml : 20170314
<ACCEPTANCE-DATETIME>20170314160603
ACCESSION NUMBER:		0001193125-17-082021
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20170314
DATE AS OF CHANGE:		20170314
GROUP MEMBERS:		J. BRYAN KING
GROUP MEMBERS:		J. LUTHER KING, JR.
GROUP MEMBERS:		LKCM CORE DISCIPLINE, L.P.
GROUP MEMBERS:		LKCM INVESTMENT PARTNERSHIP II, L.P.
GROUP MEMBERS:		LKCM INVESTMENT PARTNERSHIP, L.P.
GROUP MEMBERS:		LKCM MICRO-CAP PARTNERSHIP, L.P.
GROUP MEMBERS:		LKCM PRIVATE DISCIPLINE MASTER FUND, SPC

SUBJECT COMPANY:	

	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:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-19763
		FILM NUMBER:		17688112

	BUSINESS ADDRESS:	
		STREET 1:		4625 RED BANK ROAD, SUITE 200
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45227
		BUSINESS PHONE:		4165936543

	MAIL ADDRESS:	
		STREET 1:		2300 YONGE STREET, P.O. BOX 2408
		STREET 2:		SUITE 1710
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M4P 1E4

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KING LUTHER CAPITAL MANAGEMENT CORP
		CENTRAL INDEX KEY:			0000310051
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				75163030
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	BUSINESS ADDRESS:	
		STREET 1:		301 COMMERCE SUITE 1600
		CITY:			FORT WORTH
		STATE:			TX
		ZIP:			76102
		BUSINESS PHONE:		8173323235

	MAIL ADDRESS:	
		STREET 1:		301 COMMERCE SUITE 1600
		CITY:			FORT WORTH
		STATE:			TX
		ZIP:			76102
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>d360550dsc13d.htm
<DESCRIPTION>SC 13D
<TEXT>
Document 1 - file: d360550dsc13d.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>2 <FILENAME>d360550dex991.htm <DESCRIPTION>EX-99.1 <TEXT> Document 2 - file: d360550dex991.htm
</DOCUMENT> </SEC-DOCUMENT>