<SEC-DOCUMENT>0001193125-15-043156-index.html : 20150211
<SEC-HEADER>0001193125-15-043156.hdr.sgml : 20150211
<ACCEPTANCE-DATETIME>20150211103852
ACCESSION NUMBER:		0001193125-15-043156
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20150211
DATE AS OF CHANGE:		20150211
GROUP MEMBERS:		COLUMBIA ACORN FUND

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ESCO TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0000866706
		STANDARD INDUSTRIAL CLASSIFICATION:	COMMUNICATIONS EQUIPMENT, NEC [3669]
		IRS NUMBER:				431554045
		STATE OF INCORPORATION:			MO
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-41209
		FILM NUMBER:		15597378

	BUSINESS ADDRESS:	
		STREET 1:		9900 A CLAYTON RD
		CITY:			ST LOUIS
		STATE:			MO
		ZIP:			63124
		BUSINESS PHONE:		3142137200

	MAIL ADDRESS:	
		STREET 1:		9900 A CLAYTON RD
		CITY:			ST LOUIS
		STATE:			MO
		ZIP:			63124

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ESCO ELECTRONICS CORP
		DATE OF NAME CHANGE:	19920703

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLUMBIA WANGER ASSET MANAGEMENT LLC
		CENTRAL INDEX KEY:			0000908733
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				043519872
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		227 W MONROE STREET
		STREET 2:		SUITE 3000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		312-634-9200

	MAIL ADDRESS:	
		STREET 1:		227 W MONROE ST
		STREET 2:		STE 3000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLUMBIA WANGER ASSET MANAGEMENT LP
		DATE OF NAME CHANGE:	20040427

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LIBERTY WANGER ASSET MANAGEMENT LP
		DATE OF NAME CHANGE:	20010220

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WANGER ASSET MANAGEMENT LP
		DATE OF NAME CHANGE:	19990108
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>d866435dsc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: d866435dsc13ga.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d866435dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d866435dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>