<SEC-DOCUMENT>0001193125-21-145210-index.html : 20210430
<SEC-HEADER>0001193125-21-145210.hdr.sgml : 20210430
<ACCEPTANCE-DATETIME>20210430162509
ACCESSION NUMBER:		0001193125-21-145210
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20210430
DATE AS OF CHANGE:		20210430

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATURAL GAS SERVICES GROUP INC
		CENTRAL INDEX KEY:			0001084991
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL, GAS FIELD SERVICES, NBC [1389]
		IRS NUMBER:				752811855
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31398
		FILM NUMBER:		21878472

	BUSINESS ADDRESS:	
		STREET 1:		404 VETERANS AIRPARK LANE
		STREET 2:		SUITE 300
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79705
		BUSINESS PHONE:		(432) 262-2700

	MAIL ADDRESS:	
		STREET 1:		404 VETERANS AIRPARK LANE
		STREET 2:		SUITE 300
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79705
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d182685ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d182685ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g1826851.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g1826851.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g182685g01e52.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g182685g01e52.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g182685g02h64.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g182685g02h64.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g182685g03u41.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g182685g03u41.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g182685g04l85.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g182685g04l85.jpg

</DOCUMENT>
</SEC-DOCUMENT>