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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
Filed by the Registrant þ
Filed by a Party other than the Registrant o
Check the appropriate box:
o   Preliminary proxy statement
 
o   Confidential, for use of the Commission Only (as permitted by Rule 14a-6(e)(2))
 
o   Definitive Proxy Statement
 
þ   Definitive Additional Materials
 
o   Soliciting Material Pursuant to Section 240.14a-12
NATURAL GAS SERVICES GROUP, INC.
 
(Name of Registrant as Specified in its Charter)
Payment of Filing Fee (Check the appropriate box):
þ   No fee required.
 
o   Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
  (1)   Title of each class of securities to which the transaction applies:
 
  (2)   Aggregate number of securities to which transaction applies:
 
  (3)   Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11:
 
  (4)   Proposed maximum aggregate value of transaction:
 
  (5)   Total fee paid:
o   Fee paid previously with preliminary materials.
 
o   Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the form or schedule and the date of its filing.
  (1)   Amount Previously Paid:
 
  (2)   Form, Schedule or Registration Statement No.:
 
  (3)   Filing Party:
 
  (4)   Date Filed:


 

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*** Exercise Your Right to Vote ***
Important Notice Regarding the Availability of Proxy Materials for the
Shareholder Meeting to Be Held on June 15, 2010

NATURAL GAS SERVICES GROUP, INC.

Meeting Information
Meeting Type: Annual Meeting
For holders as of: April 19, 2010
Date: June 15, 2010      Time: 9:00 AM CDT
Location:    Hilton Hotel
117 West Wall Street
Midland, TX 79701
You are receiving this communication because you hold shares in the above named company.
This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).
We encourage you to access and review all of the important information contained in the proxy materials before voting.
See the reverse side of this notice to obtain proxy materials and voting instructions.




 


 

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Before You Vote
How to Access the Proxy Materials
Proxy Materials Available to VIEW or RECEIVE:
1. Notice & Proxy Statement     2. 10-K/Annual Report Combo
How to View Online:
Have the 12-Digit Control Number available (located on the following page) and visit: www.proxyvote.com.
How to Request and Receive a PAPER or E-MAIL Copy:
If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:
     
1) BY INTERNET:
  www.proxyvote.com
2) BY TELEPHONE:
  1-800-579-1639
3) BY E-MAIL*:
  sendmaterial@proxyvote.com
*  
If requesting materials by e-mail, please send a blank e-mail with the 12-Digit Control Number (located on the following page) in the subject line.
Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before June 01, 2010 to facilitate timely delivery.
How To Vote
Please Choose One of the Following Voting Methods
Vote In Person: If you choose to vote these shares in person at the meeting, you must request a “legal proxy.” To do so, please follow the instructions at www.proxyvote.com or request a paper copy of the materials, which will contain the appropriate instructions. Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance.
Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the 12-Digit Control Number available and follow the instructions.
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a voting instruction form.


 


 

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Voting items
The Board of Directors recommends that you
vote FOR the following:
1.  
Election of Directors
Nominees
01  
John W. Chisholm              02  Richard L. Yadon
The Board of Directors recommends you vote FOR the following proposal(s):
2   Ratification of the appointment of BDO Seidman, LLP as the Company’s Independent Registered Public Accounting Firm for 2010.
 
NOTE:   In their discretion, upon such other matters that may properly come before the meeting or any adjournment or adjournments thereof. The shares represented by this proxy when properly executed will be voted in the manner directed herein by the undersigned Shareholder(s). If no discretion is made, this proxy will be voted FOR Items 1 and 2. If any other matters properly come before the meeting, the person named in this proxy will vote in their discretion.
 
        




 


 

 
 
Voting Instructions
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(NSGS LOGO)

NATURAL GAS SERVICES GROUP, INC
508 WEST WALL STREET, SUITE 550
MIDLAND, TX 79701
 
 
VOTE BY INTERNET - www.proxyvote.com
Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 P.M. Eastern Time on June 14, 2010. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.

Electronic Delivery of Future PROXY MATERIALS
If you would like to reduce the costs incurred by our company in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access proxy materials electronically in future years.

VOTE BY PHONE - 1-800-690-6903
Use any touch-tone telephone to transmit your voting instructions up until 11:59 P.M. Eastern Time on June 14, 2010. Have your proxy card in hand when you call and then follow the instructions.

VOTE BY MAIL
Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.

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TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:
    KEEP THIS PORTION FOR YOUR RECORDS
    DETACH AND RETURN THIS PORTION ONLY
THIS  PROXY  CARD  IS  VALID  ONLY  WHEN  SIGNED  AND  DATED.
                           
  For
All
  Withhold
All
  For All
Except
 
To withhold authority to vote for any individual nominee(s), mark “For All Except” and write the number(s) of the nominee(s) on the line below.


 
 
  The Board of Directors recommends that you
vote FOR the following:
 

o
 

o
 

o
     
                     
  1. Election of Directors
Nominees
                     
                           
                           
  01   John W. Chisholm          02  Richard L. Yadon
                         
                 
 
The Board of Directors recommends you vote FOR the following proposal(s):
  For   Against   Abstain
 
               
 
Ratification of the appointment of BDO Seidman, LLP as the Company’s Independent Registered Public Accounting Firm for 2010.
  o   o   o
 
               
 
NOTE: In their discretion, upon such other matters that may properly come before the meeting or any adjournment or adjournments thereof. The shares represented by this proxy when properly executed will be voted in the manner directed herein by the undersigned Shareholder(s). If no discretion is made, this proxy will be voted FOR Items 1 and 2. If any other matters properly come before the meeting, the person named in this proxy will vote in their discretion.            
 
               
                               
Please indicate if you plan to attend this meeting.
Yes

o
  No

o
                       
 
Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name, by authorized officer.                      
                           
                     
Signature [PLEASE SIGN WITHIN BOX] Date           Signature (Joint Owners) Date    

 


 

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Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice & Proxy Statement, 10-K/Annual Report Combo is/are available at www.proxyvote.com.
 

NATURAL GAS SERVICES GROUP, INC.
THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD
OF DIRECTORS
ANNUAL MEETING OF SHAREHOLDERS June 15, 2010.
The shareholder(s) hereby appoint(s) Stephen C. Taylor and Gene A. Strasheim, or either of them, as proxies, each with the power to appoint his substitute, and hereby authorizes them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of Common Stock of NATURAL GAS SERVICES GROUP, INC. that the shareholder(s) is/are entitled to vote at the Annual Meeting of Shareholder(s) to be held at 09:00 AM, CDT on June 15, 2010, at the Hilton Hotel at 117 West Wall Street Midland, TX 79701, and any adjournment or postponement thereof.
THIS PROXY, WHEN PROPERLY EXECUTED WILL BE VOTED AS DIRECTED BY THE SHAREHOLDER(S). IF NO SUCH DIRECTIONS ARE MADE, THIS PROXY WILL BE VOTED FOR THE ELECTION OF THE NOMINESS LISTED ON THE REVERSE SIDE FOR THE BOARD OF DIRECTORS AND FOR THE PROPOSAL.
PLEASE MARK,SIGN, DATE AND RETURN THIS PROXY CARD PROMPTLY USING THE ENCLOSED REPLY ENVELOPE.
Continued and to be signed on reverse side