As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 5/17/24‡ Natural Gas Services Group Inc.   8-K:2,7     5/16/24    2:2.3M                                                            
 5/15/24  Natural Gas Services Group Inc.   8-K:2       5/15/24   11:460K                                                            
 5/15/24  Natural Gas Services Group Inc.   10-Q        3/31/24   58:13M                                                             
 5/13/24  Bradshaw David L                  4/A        Director²   1:4K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
 5/13/24  Jacobs Justin                     4          Dir.,Off.²  1:6K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
 5/13/24  Tringali Donald J                 4          Director²   1:7K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
 5/13/24  Jenvey Nigel                      4          Director²   1:6K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
 5/13/24  Bradshaw David L                  4          Director²   1:6K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
  5/8/24  Hazlett James R                   4          Officer²    1:7K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
  5/3/24  Hazlett James R                   4          Officer²    1:6K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
  5/3/24  Natural Gas Services Group Inc.   ARS        12/31/23    2:33M                                                             
  5/2/24  Natural Gas Services Group Inc.   DEFA14A                1:429K                                                            
 4/29/24  Natural Gas Services Group Inc.   DEF 14A    12/31/23   11:2.5M                                                            
  4/1/24  Natural Gas Services Group Inc.   8-K:2,9     3/31/24   11:582K                                                            
  4/1/24  Natural Gas Services Group Inc.   10-K       12/31/23   90:7.6M                                                            
 3/18/24  Hazlett James R                   4          Officer²    1:6K   Natural Gas Services Group Inc.   Natural Gas Svcs Gp Inc. 
  3/7/24  Tucker Brian L                    4          Officer²    1:6K   Natural Gas Services Group Inc.                            
  2/9/24  Dimensional Fund Advisors LP      SC 13G/A               1:17K  Natural Gas Services Group Inc.                            
  2/8/24  Aegis Financial Corp.             SC 13G                 1:61K  Natural Gas Services Group Inc.   Toppan Merrill/FA        
          Scott L. Barbee³
  2/1/24  Natural Gas Services Group Inc.   8-K:5,8,9   1/29/24   14:4.7M                                                            

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:  -K
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-K	Annual Report — Form 10-K.
	10-Q	Quarterly Report — Form 10-Q.
	ARS	Annual Report to Security Holders.
	DEF 14A	Definitive Proxy Statement — Schedule 14A.
	DEFA14A	Definitive Additional Proxy Soliciting Material — Schedule 14A.
	SC 13G	Statement of Acquisition of Beneficial Ownership by a “Passive” Investor — Schedule 13G.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.