<SEC-DOCUMENT>0001193125-18-042390-index.html : 20180213
<SEC-HEADER>0001193125-18-042390.hdr.sgml : 20180213
<ACCEPTANCE-DATETIME>20180213154203
ACCESSION NUMBER:		0001193125-18-042390
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180213
DATE AS OF CHANGE:		20180213

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CARRIZO OIL & GAS INC
		CENTRAL INDEX KEY:			0001040593
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				760415919
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-51465
		FILM NUMBER:		18602944

	BUSINESS ADDRESS:	
		STREET 1:		500 DALLAS STREET
		STREET 2:		SUITE 2300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		7133281000

	MAIL ADDRESS:	
		STREET 1:		500 DALLAS STREET
		STREET 2:		SUITE 2300
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NWQ INVESTMENT MANAGEMENT COMPANY, LLC
		CENTRAL INDEX KEY:			0000763848
		IRS NUMBER:				470875103
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		2049 CENTURY PARK EAST
		STREET 2:		16TH FLOOR
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90067
		BUSINESS PHONE:		(310) 552-5114

	MAIL ADDRESS:	
		STREET 1:		2049 CENTURY PARK EAST
		STREET 2:		16TH FLOOR
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90067

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NWQ INVESTMENT MANAGEMENT CO LLC
		DATE OF NAME CHANGE:	20030416

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NWQ INVESTMENT MANAGEMENT CO /CA/
		DATE OF NAME CHANGE:	19990407
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>d538274dsc13ga.htm
<DESCRIPTION>CARRIZO OIL & GAS INC
<TEXT>
Document 1 - file: d538274dsc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>