SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549



                                    FORM 8-K


                                 CURRENT REPORT



                     Pursuant to Section 13 or 15 (d) of the
                         Securities Exchange Act of 1934

                                   May 8, 2003
                Date of Report (date of earliest event reported)



                        NATURAL GAS SERVICES GROUP, INC.
                        --------------------------------
             (Exact name of registrant as specified in its charter)



         Colorado                       1-31398                  5-2811855
- ----------------------------      ---------------------      -------------------
(State or other jurisdiction      (Commission File No.)       (I.R.S. Employer
       of incorporation)                                     Identification No.)



2911 SCR 1260, Midland, Texas                                       79706
- -----------------------------                                -------------------
(Address of principal executive offices)                          (Zip Code)



                                 (915) 563-3974
                              ---------------------
              (Registrant's telephone number, including area code)




ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (a) Financial Statements None (b) Pro Forma Financial Information None (c) Exhibits Exhibit 99 News Release issued by Natural Gas Services Group, Inc. on May 8, 2003 ITEM 12. RESULTS OF OPERATIONS AND FINANCIAL CONDITION. On May 8, 2003, Natural Gas Services Group, Inc. issued a news release announcing its unaudited financial results for the quarter ended March 31, 2003.

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Dated: May 8, 2003 NATURAL GAS SERVICES GROUP, INC. By: /s/ Wayne L. Vinson --------------------------- Wayne L. Vinson President

EXHIBIT INDEX EXHIBIT NUMBER EXHIBIT - -------------- ------- 99 News Release dated May 8, 2003

                                                                      EXHIBIT 99


FOR IMMEDIATE RELEASE:                                                      NEWS
- ----------------------
May 8, 2003                                                  Amex  - NGS, NGS.WS

                NATURAL GAS SERVICES GROUP REPORTS FIRST QUARTER
                                FINANCIAL RESULTS

         First Quarter Revenue from Core Leasing Business Advances 40%,
        Gross Margin Improves to 52% from 38% in First Quarter Last Year

MIDLAND, Texas -- Natural Gas Services Group, Inc. (NGSG) (Amex: NGS, NGS.WS), a
provider of equipment  and services to the natural gas and oil  industry,  today
announced financial results for the first quarter ended March 31, 2003.

Total first quarter revenue was $2,343,745  versus  $2,690,396 in 2002.  Revenue
from the Company's core leasing business increased to $1,401,163 versus $999,517
in the same quarter of 2002,  while  equipment  sales  declined to $565,272 from
$1,349,017 a year ago. First quarter service revenue  increased to $377,310 from
$341,862.

Wayne  Vinson,  president  and CEO,  said,  "The 40%  increase in first  quarter
leasing  revenue  is  consistent  with the  growth  trends we are seeing in this
segment of our business,  and also reflects our determined efforts to expand our
core leasing  programs.  As we reported in the fourth quarter,  equipment sales,
which can fluctuate  considerably from quarter to quarter, have been impacted by
the slowdown in the economy and by reductions in capital spending.  Fortunately,
current economic  conditions are fueling  increased demand for rental equipment,
as is evident by the high utilization rate of our lease fleet."

On the strength of the gross margins generated by NGSG's leasing business, total
first quarter gross margins  increased to 52% from 38% in the first quarter last
year. First quarter EBITDA (see discussion of EBITDA at the end of this release)
increased 3% to $717,788  versus  $696,503 in the same period a year ago,  while
net income  available to common  shareholders  increased 67% to $86,873,  or .02
cents per diluted share, from $51,991, or .01 cent per diluted share, in 2002.

NGSG's lease fleet grew by 13% during the first quarter. This growth was driven
in part by the  January 1, 2003,  acquisition  of 28  compressor  packages  from
Hy-Bon Engineering Company, as well as internal production. The Company ended
the quarter with 347 compressor packages in its rental fleet, up from 308 units
at end of fiscal 2002.

Cash used in operating activities during the first quarter increased to $133,361
compared with $77,807 used in operating activities during the first quarter of
last year.

NGSG  manufactures,   fabricates,   sells,   leases  and  services  natural  gas
compressors  that enhance the production of oil and gas wells.  The Company also
manufactures  and sells flare systems and flare  ignition  systems for plant and
production facilities.  For more information on NGSG, please visit the Company's
website at www.ngsgi.com.

                                                             Continued on Page 2


Page 2 of 4 Except for historical information contained herein, the statements in this release are forward-looking and made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve known and unknown risks and uncertainties, which may cause NGSG's actual results in future periods to differ materially from forecasted results. Those risks include, among other things, the loss of market share through competition or otherwise; the introduction of competing technologies by other companies; a prolonged, substantial reduction in oil and gas prices which could cause a decline in the demand for NGSG's products and services; and new governmental safety, health and environmental regulations which could require NGSG to make significant capital expenditures. The forward-looking statements included in this press release are only made as of the date of this press release, and NGSG undertakes no obligation to publicly update such forward-looking statements to reflect subsequent events or circumstances. A discussion of these factors is included in the Company's Annual Report on Form 10-KSB filed with the Securities and Exchange Commission. Natural Gas Services Group, Inc. Consolidated Income Statement (unaudited) Three months ended March 31, ---------------------------- 2003 2002 ----------- ----------- Revenue: Sales $ 565,272 $ 1,349,017 Service and maintenance income 377,310 341,862 Leasing income 1,401,163 999,517 ----------- ----------- 2,343,745 2,690,396 Costs of revenue: Cost of sales 433,173 1,065,152 Cost of service and maintenance 335,301 333,148 Cost of leasing 360,917 282,535 ----------- ----------- 1,129,391 1,680,835 ----------- ----------- Gross margin 1,214,354 1,009,561 Operating Costs: Selling expense 138,947 124,667 General and administrative expense 380,166 273,541 Amortization and depreciation 361,966 254,404 ----------- ----------- 881,079 652,612 ----------- ----------- Operating income 333,275 356,949 Interest expense (154,083) (257,360) Equity in earnings of joint venture -- 83,452 Other income 22,547 1,698 ----------- ----------- Income before income taxes 201,739 184,739 Provision for income tax 83,856 88,563 ----------- ----------- Net income 117,883 96,176 Preferred dividends 31,010 44,185 ----------- ----------- Net income available to common shareholders $ 86,873 $ 51,991 =========== =========== Earnings per share: Basic $ 0.02 $ 0.02 Diluted $ 0.02 $ 0.01 Weighted average share: Basic 4,857,632 3,357,632 Diluted 5,059,456 3,798,176 Continued on Page 3

Page 3 of 4 Natural Gas Services, Inc. Consolidated Balance Sheet (unaudited) March 31, 2003 ASSETS ----------- Current assets: Cash and cash equivalents $ 1,611,244 Accounts receivable- trade 981,398 Lease receivable- net 100,143 Inventory 2,204,467 Prepaid expenses 45,038 ----------- Total current assets 4,942,290 Property plant and equipment, net 18,443,470 Goodwill, net 2,589,655 Patents, net 134,555 Lease receivable net 87,198 Other assets 113,423 ----------- Total assets $26,310,591 =========== LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Current portion of long term debt and capital lease $ 2,224,133 Accounts payable 848,809 Unearned income 423,946 ----------- Total current liabilities 3,496,888 Long term portion, less current portion and capital lease 7,110,375 Subordinated notes, net 1,360,626 Deferred income tax payable 1,254,856 ----------- Total liabilities 13,222,745 SHAREHOLDERS' EQUITY Preferred stock 3,817 Common stock 48,576 Paid in capital 10,968,733 Retained earnings 2,066,720 ----------- Shareholders' equity 13,087,846 ----------- Total liabilities and shareholders' equity $26,310,591 =========== Continued on Page 4

Page 4 of 4 Natural Gas Services, Inc. "EBITDA" reflects net income or loss before interest, taxes, depreciation and amortization. EBITDA is a measure used by analysts and investors as an indicator of operating cash flow since it excludes the impact of movements in working capital items, non-cash charges and financing costs. Therefore, EBITDA gives an investor information as to the cash generated from the operations of a business. However, EBITDA is not a measure of financial performance under accounting principles generally accepted in the United States of America ("GAAP"), and should not be considered a substitute for other financial measures of performance. EBITDA as calculated by NGSG may not be comparable to EBITDA as calculated and reported by other companies. The most comparable GAAP measure to EBITDA is net income. The reconciliation of EBITDA to net income is as follows: Three months ended March 31, 2003 2002 ------------ ------------ EBITDA $ 717,788 $ 696,503 Adjustments to reconcile EBITDA to net income: Amortization and depreciation (361,966) (254,404) Interest expense (154,083) (257,360) Provision for income tax (83,856) (88,563) ------------ ------------ Net income $ 117,883 $ 96,176 ============ ============ ### CONTACTS: Natural Gas Services Group, Inc. Pfeiffer High Public Relations, Inc. Wayne Vinson or Wallace Sparkman Geoff High 915-563-3974 303-393-7044