UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q

     [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

     For the quarterly period ended June 30, 2006
                                       or

     [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

     For the transition period from __________________ to __________________.

                         Commission file number: 0-18953

                                   AAON, INC.
                                   ----------
             (Exact name of registrant as specified in its charter)

             Nevada                                               87-0448736
             ------                                               ----------
  (State or other jurisdiction                                  (IRS Employer
of incorporation or organization)                            Identification No.)

                     2425 South Yukon, Tulsa, Oklahoma 74107
                     ---------------------------------------
                    (Address of principal executive offices)
                                   (Zip Code)

                                 (918) 583-2266
                                 --------------
              (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.

         Yes   |X|          No   |_|

Indicate by check mark whether the registrant is a large accelerated filer, an
accelerated filer, or a non-accelerated filer.

Large accelerated filer |_|   Accelerated filer |X|   Non-accelerated filer |_|

Indicate by check mark whether the registrant is a shell company (as defined in
Rule 12b-2 of the Exchange Act).

         Yes   |_|          No   |X|

As of August 1, 2006, registrant had outstanding a total of 12,392,608 shares of
its $.004 par value Common Stock.



                         PART I - FINANCIAL INFORMATION

Item 1.  Financial Statements.

                          AAON, Inc., and Subsidiaries
                           Consolidated Balance Sheets
                                   (unaudited)

                                                             June 30,         December 31,
                                                               2006               2005
                                                     --------------------------------------
                                                     (in thousands, except for share data)
                                                                         
Assets
Current assets:
   Cash and cash equivalents                                $      66          $     837
   Certificate of deposit                                       1,000              1,000
   Accounts receivable, net                                    37,637             32,487
   Inventories, net                                            23,895             23,708
   Prepaid expenses                                               383              1,041
   Deferred tax asset                                           3,670              3,877
                                                     --------------------------------------
Total current assets                                           66,651             62,950
   Property, plant and equipment, net                          58,440             50,581
   Notes receivable, long-term                                     75                 75
                                                     --------------------------------------
Total assets                                                $ 125,166          $ 113,606
                                                     ================== ===================

Liabilities and Stockholders' Equity
Current liabilities:
   Revolving credit facility                                $   2,225          $       -
   Current maturities of long-term debt                           108                108
   Accounts payable                                            16,481             11,643
   Accrued liabilities                                         17,518             17,827
                                                     --------------------------------------
Total current liabilities                                   $  36,332          $  29,578

Long-term debt, less current maturities                             5                 59

Deferred tax liability                                          3,969              4,474

Stockholders' equity:
   Preferred stock, $.001 par value, 5,000,000
     shares authorized, no shares issued                            -                  -
   Common stock, $.004 par value, 50,000,000
     shares authorized, 12,335,891 and 12,233,558
     issued and outstanding at June 30, 2006,
     and December 31, 2005, respectively                           49                 49
   Additional paid in capital                                     622                  -
   Accumulated other comprehensive  income, net of tax            848                513
   Retained earnings                                           83,341             78,933
                                                     --------------------------------------
Total stockholders' equity                                     84,860             79,495
                                                     --------------------------------------
Total liabilities and stockholders' equity                  $ 125,166          $ 113,606
                                                     ======================================


The accompanying notes are an integral part of these statements.

                                      -1-


                          AAON, Inc., and Subsidiaries
                        Consolidated Statements of Income
                                   (unaudited)

                                                    Three Months Ended                             Six Months Ended
                                           June 30, 2006          June 30, 2005           June 30, 2006         June 30, 2005
                                          -------------------------------------------------------------------------------------
                                                            (in thousands, except share and per share data)
                                                                                                       
Net sales                                     $  59,137              $  45,394               $ 112,757             $  88,174

Cost of sales                                    49,018                 37,022                  92,254                69,752
                                          ----------------       ----------------        ----------------      ----------------
      Gross profit                               10,119                  8,372                  20,503                18,422

Selling, general and
    administrative expenses                       4,853                  3,810                   9,418                 8,573
                                          ----------------       ----------------        ----------------      ----------------
     Income from operations                       5,266                  4,562                  11,085                 9,849

Interest expense                                    (10)                    (4)                    (22)                   (6)

Interest income                                      15                     11                      24                    25

Other income                                        138                     54                     264                   190
                                          ----------------       ----------------        ----------------      ----------------
Income before income taxes                        5,409                  4,623                  11,351                10,058

Income tax provision                              1,954                  1,498                   4,153                 3,646
                                          ----------------       ----------------        ----------------      ----------------
     Net income                               $   3,455              $   3,125               $   7,198             $   6,412
                                          ================       ================        ================      ================
Earnings per share:
   Basic                                      $    0.28              $    0.25               $    0.59             $    0.52
                                          ================       ================        ================      ================
   Diluted                                    $    0.27              $    0.24               $    0.57             $    0.50
                                          ================       ================        ================      ================
Weighted average shares outstanding:
   Basic                                     12,315,485             12,360,071              12,296,426            12,373,381
                                          ================       ================        ================      ================
   Diluted                                   12,666,393             12,786,294              12,650,201            12,790,635
                                          ================       ================        ================      ================


The accompanying notes are an integral part of these statements.

                                      -2-


                          AAON, Inc., and Subsidiaries
    Consolidated Statements of Stockholders' Equity and Comprehensive Income
                                   (unaudited)

                                                                                   Accumulated
                                                                                      Other
                                              Common Stock           Paid-in      Comprehensive      Retained
                                           Shares        Amount      Capital          Income         Earnings      Total
                                       --------------------------------------------------------------------------------------
                                                                           (in thousands)
                                       --------------------------------------------------------------------------------------
                                                                                               
Balance at December 31, 2005               12,234        $   49      $     -         $   513         $ 78,933    $ 79,495
Comprehensive income:
   Net income                                   -             -            -               -            7,198       7,198
   Foreign currency translation
     adjustment                                 -             -            -             335                -         335
                                                                                                               --------------
   Total comprehensive income                                                                                       7,533
Stock options exercised, including tax
  benefits                                    195             -        2,272               -                -       2,272
Share based compensation                        -             -          236               -                -         236
Stock repurchased and retired                 (93)            -       (1,886)              -             (312)     (2,198)
Dividend payment                                -             -            -               -           (2,478)     (2,478)
                                       --------------------------------------------------------------------------------------
Balance at June 30, 2006                   12,336        $   49      $   622         $   848         $ 83,341    $ 84,860
                                       ======================================================================================


The accompanying notes are an integral part of these statements.

                                      -3-


                          AAON, Inc., and Subsidiaries
                      Consolidated Statements of Cash Flows
                                   (unaudited)

                                                                            Six Months                Six Months
                                                                               Ended                     Ended
                                                                           June 30, 2006             June 30, 2005
                                                                       -----------------------------------------------
                                                                                       (in thousands)
                                                                                                   
OPERATING ACTIVITIES
     Net income                                                                $   7,198                 $   6,412
       Adjustments to reconcile net income to net cash
          provided by operating activities:
         Depreciation                                                              4,478                     4,019
         Provision for losses on accounts receivable                                 375                       149
         Loss on disposition of assets                                                 -                        28
         Share-based compensation                                                    236                         -
         Excess tax benefits from stock options exercised                         (1,270)                        -
         Deferred income taxes                                                      (298)                   (1,108)
         Changes in assets and liabilities:
                Accounts receivable                                               (5,525)                     (759)
                Inventories                                                         (187)                   (2,342)
                Prepaid expenses                                                     658                       247
                Accounts payable                                                   4,838                    (1,103)
                Accrued liabilities                                                  961                       539
                                                                       -----------------------------------------------
     Net cash provided by operating activities                                    11,464                     6,082

INVESTING ACTIVITIES
     Proceeds from matured certificate of deposit                                  2,000                     3,000
     Investment in certificate of deposit                                         (2,000)                   (2,500)
     Notes receivable, long-term                                                       -                       (75)
     Capital expenditures                                                        (12,337)                   (5,471)
                                                                       -----------------------------------------------
     Net cash used in investing activities                                       (12,337)                   (5,046)

FINANCING ACTIVITIES
     Borrowings under revolving credit facility                                   22,810                    10,971
     Payments under revolving credit facility                                    (20,585)                  (10,713)
     Payments of long-term debt                                                      (54)                      (51)
     Stock options exercised                                                       1,002                       491
     Excess tax benefits from stock options exercised                              1,270                         -
     Repurchase of stock                                                          (2,199)                   (2,401)
     Cash dividends paid to stockholders                                          (2,478)                        -
                                                                       -----------------------------------------------
     Net cash used in financing activities                                          (234)                   (1,703)
                                                                       -----------------------------------------------

Effect of exchange rate on cash                                                      336                       (91)
                                                                       -----------------------------------------------
Net decrease in cash and cash equivalents                                           (771)                     (758)
                                                                       -----------------------------------------------
Cash and cash equivalents, beginning of year                                         837                       994
                                                                       -----------------------------------------------
Cash and cash equivalents, end of period                                       $      66                 $     236
                                                                       ===============================================


The accompanying notes are an integral part of these statements.

                                      -4-


                          AAON, Inc., and Subsidiaries
                 Notes to the Consolidated Financial Statements
                                  June 30, 2006
                                   (unaudited)

1.   BASIS OF PRESENTATION

The financial statements included herein have been prepared by the Company,
without audit, pursuant to the rules and regulations of the Securities and
Exchange Commission (SEC). Certain information and footnote disclosures normally
included in financial statements prepared in accordance with accounting
principles generally accepted in the United States have been condensed or
omitted pursuant to such rules and regulations. The Company believes that the
disclosures made in these financial statements are adequate to make the
information presented not misleading when read in conjunction with the financial
statements and the notes thereto included in the Company's latest audited
financial statements which were included in the Form 10-K Report for the fiscal
year ended December 31, 2005, filed by AAON, Inc. with the SEC. In the opinion
of management, the accompanying financial statements include all normal,
recurring adjustments required for a fair presentation of the results of the
periods presented. Operating results for the six months ended June 30, 2006, are
not necessarily indicative of the results that may be expected for the year
ending December 31, 2006.

Currency

Foreign currency transactions and financial statements are translated in
accordance with Statement of Financial Standards No. 52, Foreign Currency
Translations. The Company uses the U.S. dollar as its functional currency,
except for the Company's Canadian subsidiaries, which use the Canadian dollar.
Adjustments arising from translation of the Canadian subsidiaries' financial
statements are reflected in the Consolidated Statement of Stockholders' Equity.
Transaction gains or losses that arise from exchange rate fluctuations
applicable to transactions are denominated in Canadian currency and are included
in the results of operations as incurred.

New Accounting Pronouncements

FASB (Financial Accounting Standards Board) Statement 123(R) replaces FASB
Statement No.123, Accounting for Stock-Based Compensation, and supersedes APB
Opinion No. 25, Accounting for Stock Issued to Employees. The Statement requires
measurement of the cost of employee services received in exchange for an award
of equity instruments based on the grant-date fair value of the award. The
compensation cost will be recognized over the period of time during which an
employee is required to provide service in exchange for the award. The Statement
applies to all awards granted and any unvested awards at December 31, 2005.
Effective January 1, 2006, the Company adopted the fair value recognition method
of Statement of Financial Accounting Standards No. 123(R) Accounting for Stock
Based Compensation (SFAS 123R), using the modified-prospective-transition
method.

FASB Statement 151, Inventory Costs, replaces Accounting Research Bulletin No.
43, Chapter 4, Inventory Pricing. The Statement requires that abnormal amounts
of idle facility expense, freight, handling costs and spoilage should be
expensed as incurred and not included in overhead as an inventory cost. The new
statement also requires that allocation of fixed production overhead costs
should be based on normal capacity of the production facilities. The Statement
was effective January 1, 2006. The adoption of this statement did not have a
material impact on the Company's Consolidated Financial Statements.

In July 2006, the FASB released FASB Interpretation No. 48, Accounting for
Uncertainty in Income Taxes, an Interpretation of FASB Statement 109. FIN 48
clarifies the accounting for uncertain tax positions as described in SFAS No.
109, Accounting for Income Taxes, and requires a company to recognize, in its
financial statements, the impact of a tax position only if that position is
"more likely than not" of being sustained on an audit basis solely on the
technical merits of the position. FIN 48 also requires qualitative and
quantitative disclosures including a discussion of reasonably possible changes
that might occur in the recognized tax benefits over the next twelve months as
well as a roll-forward of all unrecognized tax benefits. FIN 48 is effective for
fiscal years beginning after December 15, 2006. The Company is currently
evaluating the effect FIN 48 will have on the Company's Consolidated Financial
Statements.

                                      -5-


2.  STOCK COMPENSATION

The Company maintains a stock option plan for key employees, directors and
consultants. The Company's stock option plan provided for 2,925,000 shares of
common stock to be issued under the plan. Under the terms of the plan, the
exercise price of shares granted may not be less than 85% of the fair market
value at the date of the grant. Options granted to directors prior to May 25,
2004, vest one year from the date of grant and are exercisable for nine years
thereafter. Options granted to directors on or after May 25, 2004, vest
one-third each after 1-3 years. All other options granted vest at a rate of 20%
per year, commencing one year after date of grant, and are exercisable during
years 2-10.

Prior to January 1, 2006, the Company accounted for its nonqualified stock
options under the recognition and measurement principles of APB Opinion No. 25,
Accounting for Stock Issued to Employees, and related interpretations. Under APB
25, no stock-based employee compensation cost was reflected in net income, as
all options granted under the plan qualified for "fixed" plan accounting and had
an exercise price equal to the market value of the underlying common stock on
the date of grant. The Company had adopted the disclosure-only provisions of
Statement of Financial Accounting Standards No. 123, Accounting for Stock Based
Compensation (SFAS 123). No stock based compensation cost was recognized in the
Consolidated Statements of Income for the six months ended June 30, 2005.
Effective January 1, 2006, the Company adopted the fair value recognition method
of Statement of Financial Accounting Standards No. 123(R) Share-Based Payment
(SFAS 123R), using the modified-prospective-transition method. Under that
transition method, compensation cost recognized in the first six months of 2006
includes all share-based payments granted prior to, but not yet vested as of
January 1, 2006, and compensation cost for all share-based payments granted
subsequent to January 1, 2006. The compensation cost is based on the grant date
fair value calculated using a Black-Scholes-Merton Option Pricing Model in
accordance with provisions of Statement 123(R).

For the three month period and the six month period ended June 30, 2006, the
Company recognized approximately $107,000 and $233,000, respectively, in pre-tax
compensation expense in the Consolidated Statement of Income related to the
stock option plan. The total pre-tax compensation cost related to nonvested
stock options not yet recognized as of June 30, 2006, is $1.7 million and is
expected to be recognized over a weighted-average period of 2.7 years.

The effect on net income and earnings per share if the Company had applied the
fair value recognition provisions of SFAS No. 123, Accounting for Stock-Based
Compensation, to stock-based employee compensation is as follows:



                                                         Three Months Ended                    Six Months Ended
                                                     June 30,          June 30,           June 30,          June 30,
                                                       2006              2005               2006              2005
                                                 ---------------------------------------------------------------------
                                                                  (in thousands, except share data)
                                                                                                
Net income as reported                               $3,455            $3,125             $7,198            $6,412

Deduct additional compensation expense
determined under fair value method for all
awards, net of related tax effects                        -              (105)                 -              (188)
                                                 --------------    --------------     --------------    --------------
Pro forma net income                                 $3,455            $3,020             $7,198            $6,224
                                                 ==============    ==============     ==============    ==============

Earnings per share:

     Basic, as reported                              $ 0.28            $ 0.25             $ 0.59            $ 0.52
                                                 ==============    ==============     ==============    ==============
     Basic, pro forma                                $ 0.28            $ 0.24             $ 0.59            $ 0.50
                                                 ==============    ==============     ==============    ==============

     Diluted, as reported                            $ 0.27            $ 0.24             $ 0.57            $ 0.50
                                                 ==============    ==============     ==============    ==============
     Diluted, pro forma                              $ 0.27            $ 0.24             $ 0.57            $ 0.49
                                                 ==============    ==============     ==============    ==============


                                      -6-


The following assumptions were used to determine the fair value of the unvested
stock options on the original grant date for expense recognition purposes for
options granted during the six months ended June 30, 2006 and for pro forma
disclosure purposes for the six months ended June 30, 2005:

                                                    Six Months Ended
                                            June 30, 2006     June 30, 2005
                                            -------------------------------
     Directors and Officers:
         Expected dividend yield                    1.65%               -
         Expected volatility                       36.48%            33.13%
         Risk-free interest rate                    5.15%             3.94%
         Expected life                            8.0 yrs           8.0 yrs

     Employees:
         Expected dividend yield                    1.65%               -
         Expected volatility                       36.48%            33.13%
         Risk-free interest rate                    5.15%             3.94%
         Expected life                           6.30 yrs           8.0 yrs

A summary of option activity under the plan as of June 30, 2006, is a follows:



                                                                            Weighted
                                                                             Average
                                                                            Remaining         Aggregate
                                                   Weighted Average        Contractual        Intrinsic
      Options                   Shares (000)        Exercise Price             Term          Value ($000)
      -------                 ----------------    ------------------    ----------------    --------------
                                                                                       
Outstanding at 1-1-06               1,113,680                  7.51

Granted                                75,000                 25.01

Exercised                            (194,575)                 5.15

Forfeited or Expired                  (19,500)                14.94
                              ----------------
Outstanding at 6-30-06                974,605                  9.20                 4.1            15,804
                              ================    ==================    ================    ==============
Exercisable at 6-30-06                772,585                  6.40                 2.8            14,695
                              ================    ==================    ================    ==============


The weighted average grant date fair value of options granted during 2006 was
$9.82. The total intrinsic value of options exercised during 2006 was $3.9
million.

A summary of the status of the non vested shares as of June 30, 2006, is as
follows:

                                                              Weighted Average
                                                              Grant Date Fair
                                     Shares                        Value
                               --------------------           ----------------
Nonvested at 1-1-06                        197,420                  7.73
Granted                                     75,000                  9.82
Vested                                     (50,900)                 7.33
Forfeited                                  (19,500)                 7.49
                              ---------------------
Nonvested at 6-30-06                       202,020                  8.63
                              =====================

                                      -7-


3.  CASH AND CASH EQUIVALENTS

Cash and cash equivalents consist of bank deposits and highly liquid,
interest-bearing money market funds with initial maturities of three months or
less.

4.  CERTIFICATE OF DEPOSIT

At June 30, 2006, the Company had invested $1 million in a 30-day certificate of
deposit that bears interest at 4.61% per annum and matures on July 6, 2006.

5.  ACCOUNTS RECEIVABLE

The Company grants credit to its customers and performs ongoing credit
evaluations. The Company generally does not require collateral or charge
interest. The Company establishes an allowance for doubtful accounts based upon
factors surrounding the credit risk of specific customers, historical trends,
economic and market conditions and the age of the receivable. Past due accounts
are generally written off against the allowance for doubtful accounts only after
all collection attempts have been exhausted.

Accounts receivable and the related allowance for doubtful accounts are as
follows:



                                                                June 30,                  December 31,
                                                                  2006                        2005
                                                         -------------------------------------------------
                                                                          (in thousands)
                                                                                    
Accounts receivable                                           $   38,012                  $   33,172
Less: allowance for doubtful accounts                               (375)                       (685)
                                                         ---------------------       ---------------------
Total, net                                                    $   37,637                  $   32,487
                                                         =====================       =====================



                                                                         Six Months Ended
                                                                June 30,                    June 30,
                                                                  2006                        2005
                                                         -------------------------------------------------
                                                                          (in thousands)
                                                                                    
Allowance for doubtful accounts:
   Balance, beginning of period                               $      685                  $      717
   Provision for losses on accounts receivable, net of
   adjustments to provision                                          (28)                        149
   Accounts receivable written off, net of recoveries               (282)                       (201)
                                                         ---------------------       ---------------------
   Balance, end of period                                     $      375                  $      665
                                                         =====================       =====================


6.  INVENTORIES

Inventories are valued at the lower of cost or market. Cost is determined by the
first-in, first-out (FIFO) method. The Company establishes an allowance for
excess and obsolete inventories based on product line changes, the feasibility
of substituting parts and the need for supply and replacement parts. At June 30,
2006, and December 31, 2005, inventory balances and the related changes in the
allowance for excess and obsolete inventories account are as follows:



                                                                June 30,                  December 31,
                                                                  2006                        2005
                                                         -------------------------------------------------
                                                                          (in thousands)
                                                                                    
Raw materials                                                 $   18,139                  $   18,256
Work in process                                                    2,204                       1,981
Finished goods                                                     3,902                       3,821
                                                         ---------------------       ---------------------
                                                                  24,245                      24,058

Less: Inventory reserve                                             (350)                       (350)
                                                         ---------------------       ---------------------
Total, net                                                    $   23,895                  $   23,708
                                                         =====================       =====================


                                      -8-



                                                                         Six Months Ended
                                                                June 30,                    June 30,
                                                                  2006                        2005
                                                         -------------------------------------------------
                                                                          (in thousands)
                                                                                    
Allowance for excess and obsolete inventories:
   Balance, beginning of period                               $      350                  $    1,050
   Provision for excess and obsolete inventories                       -                           -
   Adjustments to reserve                                              -                           -
                                                         ---------------------       ---------------------
   Balance, end of period                                     $      350                  $    1,050
                                                         =====================       =====================


7.   ACCRUED LIABILITIES

At June 30, 2006, and December 31, 2005, accrued liabilities were comprised of
the following:



                                                                June 30,                  December 31,
                                                                  2006                        2005
                                                         -------------------------------------------------
                                                                          (in thousands)
                                                                                    
           Warranty                                           $    6,814                  $    6,282
           Commissions                                             6,922                       8,037
           Payroll                                                 1,059                       1,215
           Income taxes                                                -                         623
           Workers' compensation                                     494                         555
           Medical self-insurance                                    897                         664
           Other                                                   1,332                         451
                                                         ---------------------       ---------------------
           Total                                              $   17,518                  $   17,827
                                                         =====================       =====================


                                      -9-


8.  REVOLVING CREDIT FACILITY

The Company's revolving credit facility provides for maximum borrowings of $15.2
million. Interest on borrowings is payable monthly at the Wall Street Journal
prime rate less .5% or LIBOR plus 1.6%, at the election of the Company with a
maturity date of June 30, 2006. On July 30, 2006, the company renewed the line
of credit with a new maturity date of July 30, 2007. At June 30, 2006, the
Company had $2.2 million in borrowings under the revolving credit facility
compared to $258,000 at June 30, 2005. The Company had no borrowings under the
revolving credit facility at December 31, 2005. Borrowings available under the
revolving credit facility at June 30, 2006, were $12.4 million. In addition, the
Company has a $600,000 letter of credit that expires December 31, 2006. The
credit facility previously required the Company to maintain a certain financial
ratio and prohibited the declaration of cash dividends. On February 14, 2006,
the Board of Directors voted to initiate a semi-annual cash dividend of $0.20
per share to the holders of the outstanding Common Stock of the Company as of
the close of business on June 12, 2006, the record date, payable on July 3,
2006. In conjunction with the Board's vote on February 14th, the restriction of
payments of dividends was waived by the lender and removed from the covenants
with the renewal of the line of credit July 30, 2006. At June 30, 2006, the
Company was in compliance with its financial ratio covenants.

9.  EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per
share:



                                                         Three Months Ended                    Six Months Ended
                                                     June 30,          June 30,           June 30,          June 30,
                                                       2006              2005               2006              2005
                                                 ---------------------------------------------------------------------
                                                              (in thousands, except share and per share data)
                                                                                                
Numerator:

Net income                                           $ 3,455           $ 3,125            $ 7,198           $ 6,412

Denominator:
Denominator for basic earnings per share -
   Weighted average shares                        12,315,485        12,360,071         12,296,426        12,373,381
Effect of dilutive employee stock options            350,908           426,223            353,775           417,254
                                              ---------------   ---------------    ---------------   ---------------
Denominator for diluted earnings per share-
   Weighted average shares                        12,666,393        12,786,294         12,650,201        12,790,635
                                              ===============   ================   ===============   ===============
Basic earnings per share                             $  0.28           $  0.25            $  0.59           $  0.52
                                              ===============   ================   ===============   ===============
Diluted earnings per share                           $  0.27           $  0.24            $  0.57           $  0.50
                                              ===============   ================   ===============   ===============

Anti-dilutive shares                                                                       75,000            99,250
                                                                                   ===============   ===============
Weighted average exercise price                                                           $ 25.01           $ 19.03
                                                                                   ===============   ===============



                                      -10-


10. STOCK REPURCHASE

Following repurchases of approximately 12% of its outstanding Common Stock
between September 1999 and September 2001, the Company announced and began its
current stock repurchase program on October 17, 2002, targeting repurchases of
up to an additional 10% (1,325,000 shares) of its outstanding stock. Through
June 30, 2006, the Company had repurchased a total of 1,257,864 shares under the
current program for an aggregate price of $22,034,568, or an average of $17.52
per share. On February 14, 2006, the Board of Directors approved the suspension
of the Company's repurchase program.

On July 1, 2005, the Company entered into a stock repurchase arrangement by
which employee-participants in AAON's 401K Savings and Investment Plan are
entitled to have shares of AAON stock in their accounts sold to the Company to
provide diversification of their investments. Through June 30, 2006, the Company
repurchased 187,771 shares for an aggregate price of $3,786,310 or an average
price of $20.16 per share.

11. CONTINGENCIES

The Company is subject to claims and legal actions that arise in the ordinary
course of business. Management believes that the ultimate liability, if any,
will not have a material effect on the Company's results of operations or
financial position.

                                      -11-


Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations.

AAON engineers, manufactures and markets air-conditioning and heating equipment
consisting of standardized and custom rooftop units, chillers, air-handling
units, make-up units, heat recovery units, condensing units and coils.

AAON sells its products to property owners and contractors through a network of
manufacturers' representatives and its internal sales force. Demand for the
Company's products is influenced by national and regional economic and
demographic factors. The commercial and industrial new construction market is
subject to cyclical fluctuations in that it is generally tied to housing starts,
but has a lag factor of 6-18 months. Housing starts, in turn, are affected by
such factors as interest rates, the state of the economy, population growth and
the relative age of the population. When new construction is down, the Company
emphasizes the replacement market.

The principal components of cost of goods sold are labor, raw materials,
component costs, factory overhead, freight out and engineering expense. The
principal raw materials used in AAON's manufacturing processes are steel, copper
and aluminum. The major component costs include compressors, electric motors and
electronic controls.

Selling, general, and administrative ("SG&A") costs include the Company's
internal sales force, warranty costs, profit sharing and administrative expense.
Warranty expense is estimated based on historical trends and other factors. The
Company's warranty on its products is: for parts only, the earlier of one year
from the date of first use or 14 months from date of shipment; compressors (if
applicable), an additional four years, on gas-fired heat exchangers (if
applicable), 15 years, and on stainless steel heat exchangers (if applicable),
25 years.

The Company's operations in Burlington, Ontario, Canada, are located at 279
Sumach Drive, consisting of an 82,000 sq. ft. office/manufacturing facility on a
5.6 acre tract of land.

The office facilities of AAON, Inc. consist of a 337,000 square foot building
(322,000 sq. ft. of manufacturing/warehouse space and 15,000 sq. ft. of office
space) located at 2425 S. Yukon Avenue, Tulsa, Oklahoma (the "original
facility"), and a 563,000 square foot manufacturing/warehouse building and a
22,000 square foot office building (the "expansion facility") located across the
street from the original facility at 2440 S. Yukon Avenue. The Company utilizes
39% of the expansion facility and the remaining 61% is leased to a third party.
The operations of AAON Coil Products, Inc. are conducted in a plant/office
building at 203-207 Gum Springs Road in Longview, Texas, containing 258,000
square feet (251,000 sq. ft. of manufacturing/warehouse and 7,000 sq. ft. of
office space). In 2004 and 2005, AAON Coil Products purchased an additional 15
acres of land for future expansion.

                                      -12-


Set forth below is unaudited income statement information with respect to the
Company for the periods ended June 30, 2006, and 2005:





                                                   Three Months Ended                        Six Months Ended
                                           June 30, 2006       June 30, 2005         June 30, 2006      June 30, 2005
                                          ----------------------------------------------------------------------------
                                                                        (In thousands)
                                                                                              
Net sales                                    $  59,137           $  45,394             $  112,757         $   88,174

Cost of sales                                   49,018              37,022                 92,254             69,752
                                          ----------------   ------------------    ----------------    ---------------
     Gross profit                               10,119               8,372                 20,503             18,422

Selling, general and administrative
    expenses                                     4,853               3,810                  9,418              8,573
                                          ----------------   ------------------    ----------------    ---------------
     Income from operations                      5,266               4,562                 11,085              9,849

Interest expense                                   (10)                 (4)                   (22)                (6)
Interest income                                     15                  11                     24                 25
Other income                                       138                  54                    264                190
                                          ----------------   ------------------    ----------------    ---------------
Income before income taxes                       5,409               4,623                 11,351             10,058
Income tax provision                             1,954               1,498                  4,153              3,646
                                          ----------------   ------------------    ----------------    ---------------
     Net income                              $   3,455           $   3,125             $    7,198         $    6,412
                                          ================   ==================    ================    ===============


Results of Operations

Net sales increased $13.7 million (30.3%) to $59.1 million from $45.3 million
for the three months ended June 30, 2006, and $24.6 million (27.9%) to $112.8
million from $88.1 million for the six months ended June 30, 2006, compared to
the same periods in 2005. Increased sales were attributable to an increase in
volume of product sold related to an improvement of the commercial and
industrial construction industry, the Company's new and redesigned products
being favorably received by its customers, and price increases.

Gross profit increased $1.7 million (20.9%) to $10.1 million from $8.4 million
for the three months ended June 30, 2006, and increased $2.1 million (11.3%) to
$20.5 million from $18.4 million for the six months ended June 30, 2006,
compared to the same periods in 2005. Gross margins were 17.1% compared to 18.4%
for the three months ended June 30, 2006 and June 30, 2005, respectively, and
were 18.2% compared to 20.9% for the six months ended June 30, 2006 and June 30,
2005, respectively. The decrease in gross margin percent was due primarily to
continuing increases in copper and steel prices, an increase in manufacturing
expense and inbound and outbound transportation charges related to the increase
in fuel costs offset in part by price increases. The increase in total gross
profits was due primarily to increased volume of product sold.

Steel, copper and aluminum are high volume materials used in the manufacturing
of the Company's products, which are obtained from domestic suppliers. The
Company experienced increased copper and steel prices during the first six
months of the year with some stabilization of copper pricing during the second
quarter. The Company also purchases from other domestic manufacturers certain
components, including compressors, electric motors and electrical controls used
in its products. The suppliers of these components are significantly affected by
the rising raw material costs as steel, copper and aluminum are used in the
manufacturing of their products. The Company is also experiencing price
increases from component part suppliers. The Company attempts to limit the
impact of price increases on these materials by entering into cancelable fixed
price contracts with its major suppliers for periods of 6-12 months.

                                      -13-


Selling, general and administrative expenses increased $1.0 million (27.4%) to
$4.9 million from $3.8 million for the three months ended June 30, 2006, and
increased $.8 million (9.9%) to $9.4 million from $8.6 million for the six
months ended June 30, 2006, compared to the same periods in 2005. The increase
was due primarily to an increase in warranty and sales expenses related to
increased sales.

The decrease in the income tax provision effective tax rate to 37% from 39.5%
was related to the impact of state and foreign taxes.

Financial Condition and Liquidity

Net accounts receivable increased $5.2 million from $32.4 million at December
31, 2005, to $37.6 million at June 30, 2006, due to the increase in sales.

Inventories increased $187,000 to $23,895,000 at June 30, 2006, compared to
$23,708,000 at December 31, 2005, due to the timing of procurement of raw
material and purchased parts required to accommodate increases sales.

Accounts payable and accrued liabilities increased $4.5 million to $34.0 million
at June 30, 2006, compared to $29.5 million at December 31, 2005, due primarily
to an increase in expenses and timing of payments to vendors.

The Company generated $11.5 million and $6.1 million cash from operating
activities during the six months ended June 30, 2006, and June 30, 2005,
respectively. The increase in 2006 related primarily to an increase in net
income and the timing of accounts payable payments and receipt of accounts
receivable.

Cash flows used in investing activities were $12.3 million for the six months
ended June 30, 2006, and $5.0 million for the six months ended June 30, 2005.
Cash flows used in investing activities in 2006 and in 2005 were related
primarily to capital expenditures for additions of machinery and equipment. All
capital expenditures were financed out of cash generated from operations.

Cash flows used in financing activities were $234,000 and $1.7 million during
the six months ended June 30, 2006, and June 30, 2005, respectively. The cash
flows used in financing activities in 2006 included the effects of stock options
exercised and the related excess tax benefits. On February 14, 2006, the board
of Directors voted to initiate a semi-annual cash dividend of $0.20 per share to
the holders of the outstanding Common Stock of the Company as of the close of
business on June 12, 2006, the record date, payable on July 3, 2006. The
dividend payment of $2.4 million was financed primarily by the revolving credit
facility on June 30, 2006. On July 1, 2005, the Company entered into a stock
repurchase arrangement by which employee-participants in AAON's 401K Savings and
Investment Plan are entitled to have shares of AAON stock in their accounts sold
to the Company to provide diversification of their investments. Through June 30,
2006, the Company repurchased 187,771 shares for an aggregate price of $3.8
million. The cash used in financing activities in 2005 was related primarily to
net borrowings under the revolving credit agreement. The Company's revolving
credit facility provides for maximum borrowings of $15.2 million. Interest on
borrowings is payable monthly at the Wall Street Journal prime rate less .5% or
LIBOR plus 1.6%, at the election of the Company. The Company's borrowings under
the revolving credit facility were $2.2 million compared to $258,000 at June 30,
2006 and June 30, 2005, respectively. Borrowings available under the revolving
credit facility at June 30, 2006, were $12.4 million. In addition, the Company
has a $600,000 letter of credit that expires December 31, 2006. The credit
facility requires that the Company maintain a certain financial ratio. A
restriction of payments of dividends was waived by the lender on February 14th,
and removed from the covenants with the renewal of the line of credit on July
30, 2006. On July 30, 2006, the Company renewed the line of credit with a
maturity date of July 30, 2007. At June 30, 2006, the Company was in compliance
with its financial ratio covenants.

                                      -14-


Management believes the Company's bank revolving credit facility (or comparable
financing), and projected cash flows from operations will provide the necessary
liquidity and capital resources to the Company for a minimum of the next twelve
months. The Company's belief that it will have the necessary liquidity and
capital resources is based upon its knowledge of the HVAC industry and its place
in that industry, its ability to limit the growth of its business if necessary,
and its relationship with its existing bank lender. For information concerning
the Company's revolving credit facility at June 30, 2006, see Note 8 to the
financial statements included in this report.

Critical Accounting Policies

The preparation of financial statements in conformity with accounting principles
generally accepted in the United States requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosures of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Because these estimates and assumptions require significant
judgment, future actual results could differ from those estimates and could have
a significant impact on the Company's results of operations, financial position
and cash flows. The Company reevaluates its estimates and assumptions on a
monthly basis.

The following accounting policies may involve a higher degree of estimation or
assumption:

Allowance for Doubtful Accounts - The Company establishes an allowance for
doubtful accounts based upon factors surrounding the credit risk of specific
customers, historical trends in collections and write-offs, current customer
status, the age of the receivable, economic conditions and other information.
Aged receivables are reviewed on a monthly basis to determine if the reserve is
adequate and adjusted accordingly at that time.

Inventory Reserves - The Company establishes a reserve for inventories based on
the change in inventory requirements due to product line changes, the
feasibility of using obsolete parts for upgraded part substitutions, the
required parts needed for part supply sales, replacement parts and for estimated
shrinkage.

Warranty - A provision is made for estimated warranty costs at the time the
product is shipped and revenue is recognized. The warranty period is: for parts
only, the earlier of one year from the date of first use or 14 months from date
of shipment; compressors (if applicable), an additional four years; on gas-fired
heat exchangers (if applicable), 15 years; and on stainless steel heat
exchangers (if applicable), 25 years. Warranty expense is estimated based on the
Company's warranty period, historical warranty trends and associated costs, and
any known identifiable warranty issue. Due to the absence of warranty history on
new products, an additional provision may be made for such products.

Medical Insurance - A provision is made for medical costs associated with the
Company's Medical Employee Benefit Plan, which is primarily a self-funded plan.
A provision is made for estimated medical costs based on historical claims paid
and any known potential of significant future claims. The plan is supplemented
by employee contributions and an excess policy for claims over $100,000 each.

Historically, reserves have been within management's expectations.

New Accounting Pronouncements

FASB (Financial Accounting Standards Board) Statement 123(R), Accounting for
Stock-Based Compensation replaces FASB Statement No.123, Accounting for
Stock-Based Compensation, and supersedes APB Opinion No. 25, Accounting for
Stock Issued to Employees. The Statement requires measurement of the cost of
employee services received in exchange for an award of equity instruments based
on the grant-date fair value of the award. The compensation cost will be
recognized over the period of time during which an employee is required to
provide service in exchange for the award, which will be the vesting period. The
Statement applies to all awards granted and any unvested awards at December 31,
2005. Effective January 1, 2006, the Company adopted the fair value recognition
method of Statement of Financial Accounting Standards No. 123(R) Share-Based
Payments (SFAS 123R), using the modified-prospective-transition method.

FASB Statement 151, Inventory Costs, replaces Accounting Research Bulletin No.
43, Chapter 4, Inventory Pricing. The Statement requires that abnormal amounts
of idle facility expense, freight, handling costs and spoilage should be
expensed as incurred and not included in overhead as an inventory cost. The new
statement also requires that allocation of fixed production overhead costs
should be based on normal capacity of the production facilities. The Statement
was effective January 1, 2006. The adoption of this statement did not have a
material impact on the Company's consolidated financial statements.

                                      -15-


In July 2006, the FASB released FASB Interpretation No. 48, Accounting for
Uncertainty in Income Taxes, an Interpretation of FASB Statement 109. FIN 48
clarifies the accounting for uncertain tax positions as described in SFAS No.
109, Accounting for Income Taxes, and requires a company to recognize, in its
financial statements, the impact of a tax position only if that position is
"more likely than not" of being sustained on an audit basis solely on the
technical merits of the position. FIN 48 also requires qualitative and
quantitative disclosures including a discussion of reasonably possible changes
that might occur in the recognized tax benefits over the next twelve months as
well as a roll-forward of all unrecognized tax benefits. FIN 48 is effective for
fiscal years beginning after December 15, 2006. The Company is currently
evaluating the effect FIN 48 will have on the Company's Consolidated Financial
Statements.

Forward-Looking Statements

This Annual Report includes "forward-looking statements" within the meaning of
the Private Securities Litigation Reform Act of 1995. Words such as "expects",
"anticipates", "intends", "plans", "believes", "seeks", "estimates", "will", and
variations of such words and similar expressions are intended to identify such
forward-looking statements. These statements are not guarantees of future
performance and involve certain risks, uncertainties and assumptions, which are
difficult to predict. Therefore, actual outcomes and results may differ
materially from what is expressed or forecasted in such forward-looking
statements. Readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. The Company undertakes no obligations to update publicly any
forward-looking statements, whether as a result of new information, future
events or otherwise. Important factors that could cause results to differ
materially from those in the forward-looking statements include (1) the timing
and extent of changes in raw material and component prices, (2) the effects of
fluctuations in the commercial/industrial new construction market, (3) the
timing and extent of changes in interest rates, as well as other competitive
factors during the year, and (4) general economic, market or business
conditions.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk.

The Company is subject to interest rate risk on its revolving credit facility
which bears variable interest based upon a prime or LIBOR rate. The Company had
an outstanding balance of $2.2 million as of June 30, 2006.

Foreign sales accounted for less than 4% of the Company's sales in 2006 and the
Company accepts payment for such sales in U.S. and Canadian dollars; therefore,
the Company believes it is not exposed to significant foreign currency exchange
rate risk on these sales. Foreign currency transactions and financial statements
are translated in accordance with Statement of Financial Standards No. 52,
Foreign Currency Translation. The Company uses the U.S. dollar as its functional
currency, except for the Company's Canadian subsidiaries, which use the Canadian
dollar. Adjustments arising from translation of the Canadian subsidiaries'
financial statements are reflected in Consolidated Statements of Stockholders'
Equity. Transaction gains or losses that arise from exchange rate fluctuations
applicable to transactions are denominated in Canadian currency and are included
in the results of operations as incurred.

Important raw materials purchased by the Company are steel, copper and aluminum,
which are subject to price fluctuations. The Company attempts to limit the
impact of price increases on these materials by entering cancelable fixed price
contracts with its major suppliers for periods of 6 -12 months. However, in 2006
cost increases in basic commodities, such as steel, copper and aluminum,
severely impacted profit margins.

The Company does not utilize derivative financial instruments to hedge its
interest rate or raw materials price risks.

                                      -16-


Item 4.  Controls and Procedures.

(a)   Evaluation of Disclosure Controls and Procedures

At the end of the period covered by this Quarterly Report on Form 10-Q, the
Company's management, under the supervision and with the participation of the
Company's Chief Executive Officer and Chief Financial Officer, has evaluated the
effectiveness of the design and operation of the Company's disclosure controls
and procedures. Based on that evaluation, the Company's Chief Executive Officer
and Chief Financial Officer believe that:

     o    The Company's disclosure controls and procedures are designed to
          ensure that information required to be disclosed by the Company in the
          reports it files under the Securities Exchange Act of 1934 is
          recorded, processed, summarized and reported within the time periods
          specified in the SEC's rules and forms; and

     o    The Company's disclosure controls and procedures operate such that
          important information flows to appropriate collection and disclosure
          points in a timely manner and are effective to ensure that such
          information is accumulated and communicated to the Company's
          management, and made known to the Company's Chief Executive Officer
          and Chief Financial Officer, particularly during the period when this
          Quarterly Report was prepared, as appropriate to allow timely
          decisions regarding the required disclosure.

AAON's Chief Executive Officer and Chief Financial Officer have evaluated the
Company's disclosure controls and procedures and concluded that these controls
and procedures were effective as of June 30, 2006.

(b)   Management's Quarterly Report on Internal Control over Financial Reporting

The management of AAON, Inc. and its subsidiaries (AAON) is responsible for
establishing and maintaining adequate internal control over financial reporting.
AAON's internal control system was designed to provide reasonable assurance to
the Company's management and Board of Directors regarding the preparation and
fair presentation of published financial statements.

All internal control systems, no matter how well designed, have inherent
limitations. Therefore, even those systems determined to be effective can
provide only reasonable assurance with respect to financial statement
preparation and presentation.

In making its assessment of internal control over financial reporting,
management used the criteria issued by the Committee of Sponsoring Organizations
of the Treadway Commission (COSO) in Internal Control--Integrated Framework.
Based on our assessment, we believe that, as of June 30, 2006, the Company's
internal control over financial reporting is effective based on those criteria.

(c)   Changes in Internal Control over Financial Reporting

There have been no changes in internal control over financial reporting that
occurred during 2006 that have materially affected, or are reasonably likely to
materially affect, the Company's internal control over financial reporting.

                                      -17-


                           PART II - OTHER INFORMATION

Item 1A. Risk Factors.

There have been no material changes from risk factors as previously disclosed in
registrant's Form 10-K in response to Item 1A, to Part I of Form 10-K.

Item 2.  Unregistered Sales of Equity and Securities and Use of Proceeds.

Following repurchases of approximately 12% of its outstanding Common Stock
between September 1999 and September 2001, the Company announced and began its
current stock repurchase program on October 17, 2002, targeting repurchases of
up to an additional 10% (1,325,000 shares) of its outstanding stock. Through
June 30, 2006, the Company had repurchased a total of 1,257,864 shares under the
current program for an aggregate price of $22,034,568, or an average of $17.52
per share. On February 14, 2006, the Board of Directors approved the suspension
of the Company's repurchase program.

On July 1, 2005, the Company entered into a stock repurchase arrangement by
which employee-participants in AAON's 401K Savings and Investment Plan are
entitled to have shares of AAON stock in their accounts sold to the Company to
provide diversification of their investments. Through June 30, 2006, the Company
repurchased 187,771 shares for an aggregate price of $3,786,310 or an average
price of $20.16 per share.

Item 4.  Submission of Matters to a Vote of Security Holders.

At the Company's Annual Meeting of Stockholders held on May 31, 2006, Norman H.
Asbjornson, John B. Johnson, Jr., and Charles C. Stephenson, Jr., were reelected
as directors for three-year terms by votes of 9,652,527, 9,546,042 and
10,626,579, shares, respectively "For"; 1,003,705, 1,110,190 and 29,653 shares,
respectively, "Against"; and 83,925 shares each "Withheld Authority". Other
directors whose terms of office continued after the meeting are: Thomas E.
Naugle and Jerry E. Ryan whose terms end in 2007 and Anthony Pantaleoni and Jack
E. Short whose terms end in 2008.

Item 5.  Other Information.

Although the Company has paid no cash dividends from inception to date, on
February 14, 2006, the Board of Directors voted to initiate a semi-annual cash
dividend of $0.20 per share to the holders of the outstanding Common Stock of
the Company as of the close of business on June 12, 2006, the record date,
payable on July 3, 2006.

                                      -18-


Item 6.  Exhibits.

         (a)  Exhibits

         (i)         Exhibit 31.1         Section 302 Certification of CEO
         (ii)        Exhibit 31.2         Section 302 Certification of CFO
         (iii)       Exhibit 32.1         Section 1350 Certification of CEO
         (iv)        Exhibit 32.2         Section 1350 Certification of CFO



                                   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 thereunto duly authorized.


                                              AAON, INC.



Dated: August 7, 2006                         By:   /s/ Norman H. Asbjornson
                                                  ------------------------------
                                                        Norman H. Asbjornson
                                                        President/CEO



Dated: August 7, 2006                         By:   /s/ Kathy I. Sheffield
                                                  ------------------------------
                                                        Kathy I. Sheffield
                                                        Vice President/CFO

                                      -19-