<SEC-DOCUMENT>0000807249-18-000190-index.html : 20181009
<SEC-HEADER>0000807249-18-000190.hdr.sgml : 20181009
<ACCEPTANCE-DATETIME>20181009160011
ACCESSION NUMBER:		0000807249-18-000190
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20181009
DATE AS OF CHANGE:		20181009

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHWEST GAS CORP
		CENTRAL INDEX KEY:			0000092416
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION & DISTRIBUTION [4923]
		IRS NUMBER:				880085720
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-32272
		FILM NUMBER:		181113632

	BUSINESS ADDRESS:	
		STREET 1:		5241 SPRING MOUNTAIN RD
		STREET 2:		PO BOX 98510
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89193-8510
		BUSINESS PHONE:		7028767083

	MAIL ADDRESS:	
		STREET 1:		5241 SPRING MOUNTAIN RD
		STREET 2:		PO BOX 98510
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89193-8510

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GAMCO INVESTORS, INC. ET AL
		CENTRAL INDEX KEY:			0000807249
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				133056041
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE CORPORATE CENTER
		CITY:			RYE
		STATE:			NY
		ZIP:			10580-1434
		BUSINESS PHONE:		9149215000

	MAIL ADDRESS:	
		STREET 1:		ONE CORPORATE CENTER
		CITY:			RYE
		STATE:			NY
		ZIP:			10580

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GABELLI ASSET MANAGEMENT INC ET AL
		DATE OF NAME CHANGE:	20020828

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GABELLI FUNDS INC ET AL
		DATE OF NAME CHANGE:	19940714
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>swx_31.htm
<TEXT>
Document 1 - file: swx_31.htm

</DOCUMENT>
</SEC-DOCUMENT>