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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 March 31, 2010

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 0-7406





PrimeEnergy Corporation

(Exact name of registrant as specified in its charter)







|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Delaware                                                       |  | 84-0637348                          
|(State or other jurisdiction of
incorporation or organization) |  | (I.R.S. employer
Identification No.)

One Landmark Square, Stamford, Connecticut 06901

(Address of principal executive offices)

(203) 358-5700

(Registrants telephone number, including area code)



(Former name, former address and former fiscal year, if changed
since last report)





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 filings required for the past 90
days.    Yes  x    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File
required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈    No   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting
company. See the definitions of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act.



|                        |  |                                                |  |                           |  |  
|----------------------- |  | ---------------------------------------------- |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈                                              |  | Accelerated filer         |  |  ̈
|                        |  |                                                | 
|Non-accelerated filer   |  |  ̈  (Do not check if smaller reporting company) |  | Smaller reporting company |  | x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  x

The number of shares outstanding of each class of the Registrants Common Stock as of May 11, 2010 was: Common Stock, $0.10 par value,
3,026,397 shares.









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##### Table of Contents

PrimeEnergy Corporation

Index to Form 10-Q

March 31, 2010



|                                                                                                   |  |       |  |     
|-------------------------------------------------------------------------------------------------- |  | ----- |  | ----
|                                                                                                   |  |       |  | Page
|Part I - Financial Information                                                                     |  |      
|                                                                                                   | 
|Item 1. Financial Statements                                                                       |  |      
|                                                                                                   | 
|Consolidated Balance Sheet  March 31, 2010 and December 31,
2009                                  |  | 3-4  
|                                                                                                   | 
|Consolidated Statement of Operations for the three months ended March 31, 2010 and 2009            |  | 5    
|                                                                                                   | 
|Consolidated Statement of Stockholders Equity for the three months ended March 
31, 2010          |  | 6    
|                                                                                                   | 
|Consolidated Statement of Comprehensive Income for the three months ended March 
31, 2010 and 2009 |  | 7    
|                                                                                                   | 
|Consolidated Statement of Cash Flows for the three months ended March 31, 2010 and 2009            |  | 8    
|                                                                                                   | 
|Notes to Consolidated Financial Statements                                                         |  | 9-15 
|                                                                                                   | 
|Item 
2. Managements Discussion and Analysis of Financial Conditions and Results of Operation     |  | 16-17
|                                                                                                   | 
|Item 3. Quantitative and Qualitative Disclosures About Market Risk                                 |  | 18   
|                                                                                                   | 
|Item 4. Controls and Procedures                                                                    |  | 18   
|                                                                                                   | 
|Part II - Other Information                                                                        |  | 18   
|                                                                                                   | 
|Item 1. Legal Proceedings                                                                          |  | 18   
|                                                                                                   | 
|Item 1A. Risk Factors                                                                              |  | 18   
|                                                                                                   | 
|Item 2. Unregistered Sales of Equity Securities and Use of Proceeds                                |  | 18   
|                                                                                                   | 
|Item 3. Defaults Upon Senior Securities                                                            |  | 18   
|                                                                                                   | 
|Item 4. Reserved                                                                                   |  | 18   
|                                                                                                   | 
|Item 5. Other Information                                                                          |  | 18   
|                                                                                                   | 
|Item 6. Exhibits                                                                                   |  | 19   
|                                                                                                   | 
|Signatures                                                                                         |  | 22   



2



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PART IFINANCIAL INFORMATION



|Item 1. | FINANCIAL STATEMENTS
|------- | --------------------

PrimeEnergy Corporation

Consolidated Balance Sheet

March 31, 2010 and December 31, 2009



|                                                        |  |               |             |                  |   |            
|------------------------------------------------------- |  | ------------- | ----------- | ---------------- | - | -----------
|                                                        |  | March 31,2010 |             | December 31,2009
|                                                        |  | (Unaudited)   |             | (Audited)       
|ASSETS                                                  |  |               |             |                  |   |            
|Current assets:                                         |  |               |             |                  |   |            
|Cash and cash equivalents                               |  | $             | 10,946,000  |                  | $ | 11,779,000 
|Restricted cash and cash equivalents                    |  |               | 5,019,000   |                  |   | 5,497,000  
|Accounts receivable, net                                |  |               | 13,767,000  |                  |   | 13,876,000 
|Due from related parties                                |  |               | 65,000      |                  |   | 30,000     
|Prepaid expenses                                        |  |               | 561,000     |                  |   | 1,100,000  
|Derivative contracts                                    |  |               | 3,417,000   |                  |   | 657,000    
|Inventory at cost                                       |  |               | 1,626,000   |                  |   | 1,871,000  
|Deferred income taxes                                   |  |               | 750,000     |                  |   | 838,000    
|                                                        |  |               |             |                  |   |            
|Total current assets                                    |  |               | 36,151,000  |                  |   | 35,648,000 
|                                                        |  |               |             |                  |   |            
|                                                        |  |              
|Property and equipment, at cost                         |  |               |             |                  |   |            
|Oil and gas properties (successful efforts method), net |  |               | 167,004,000 |                  |   | 173,843,000
|Field service equipment and other, net                  |  |               | 7,154,000   |                  |   | 7,263,000  
|                                                        |  |               |             |                  |   |            
|                                                        |  |              
|Net property and equipment                              |  |               | 174,158,000 |                  |   | 181,106,000
|                                                        |  |              
|Other assets                                            |  |               | 1,074,000   |                  |   | 764,000    
|                                                        |  |               |             |                  |   |            
|                                                        |  |              
|Total assets                                            |  | $             | 211,383,000 |                  | $ | 217,518,000
|                                                        |  |               |             |                  |   |            

See accompanying notes to the consolidated financial
statements.



3



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PrimeEnergy Corporation

Consolidated Balance Sheet

March 31, 2010 and December 31, 2009



|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------- | ----------- | - | ---------------- | - | ----------- | -
|                                                                                                                                                                            |  | March 31,2010 |             |   | December 31,2009 |  
|                                                                                                                                                                            |  | (Unaudited)   |             |   | (Audited)        |  
|LIABILITIES and STOCKHOLDERS EQUITY                                                                                                                                        |  |               |             |   |                  |   |             |  
|Current liabilities:                                                                                                                                                        |  |               |             |   |                  |   |             |  
|Current bank debt                                                                                                                                                           |  | $             | 5,500,000   |   |                  | $ | 7,000,000   |  
|Accounts payable                                                                                                                                                            |  |               | 19,028,000  |   |                  |   | 21,291,000  |  
|Current portion of asset retirement and other long-term obligations                                                                                                         |  |               | 2,873,000   |   |                  |   | 3,374,000   |  
|Derivative liability short term                                                                                                                                             |  |               | 2,505,000   |   |                  |   | 2,288,000   |  
|Accrued liabilities                                                                                                                                                         |  |               | 5,407,000   |   |                  |   | 5,985,000   |  
|Due to related parties                                                                                                                                                      |  |               | 473,000     |   |                  |   | 450,000     |  
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|Total current liabilities                                                                                                                                                   |  |               | 35,786,000  |   |                  |   | 40,388,000  |  
|                                                                                                                                                                            |  |              
|Long-term bank debt                                                                                                                                                         |  |               | 81,330,000  |   |                  |   | 86,955,000  |  
|Indebtedness to related parties                                                                                                                                             |  |               | 20,000,000  |   |                  |   | 20,000,000  |  
|Asset retirement obligations                                                                                                                                                |  |               | 16,821,000  |   |                  |   | 16,862,000  |  
|Derivative liability long term                                                                                                                                              |  |               | 1,612,000   |   |                  |   | 2,892,000   |  
|Deferred income taxes                                                                                                                                                       |  |               | 18,241,000  |   |                  |   | 16,635,000  |  
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|Total liabilities                                                                                                                                                           |  |               | 173,790,000 |   |                  |   | 183,732,000 |  
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|                                                                                                                                                                            |  |              
|Stockholders equityPrimeEnergy:                                                                                                                                           |  |               |             |   |                  |   |             |  
|Common stock, $.10 par value; 2010 and 2009: Authorized: 4,000,000 shares, issued: 3,836,397 shares; outstanding 2010: 3,026,397
shares; outstanding 2009: 3,032,097 shares |  |               | 383,000     |   |                  |   | 383,000     |  
|Paid in capital                                                                                                                                                             |  |               | 5,475,000   |   |                  |   | 5,465,000   |  
|Retained earnings                                                                                                                                                           |  |               | 47,165,000  |   |                  |   | 43,725,000  |  
|Accumulated other comprehensive income, net                                                                                                                                 |  |               | (60,000     | ) |                  |   | (214,000    | )
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|                                                                                                                                                                            |  |               | 52,963,000  |   |                  |   | 49,359,000  |  
|Treasury stock, at cost; 2010: 810,000 shares; 2009: 804,300 shares                                                                                                         |  |               | (25,586,000 | ) |                  |   | (25,417,000 | )
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|Total stockholders equityPrimeEnergy                                                                                                                                      |  |               | 27,377,000  |   |                  |   | 23,942,000  |  
|Non-controlling interest                                                                                                                                                    |  |               | 10,216,000  |   |                  |   | 9,844,000   |  
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|Total stockholders equity                                                                                                                                                  |  |               | 37,593,000  |   |                  |   | 33,786,000  |  
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  
|Total liabilities and stockholders equity                                                                                                                                  |  | $             | 211,383,000 |   |                  | $ | 217,518,000 |  
|                                                                                                                                                                            |  |               |             |   |                  |   |             |  

See accompanying notes to the consolidated financial statements.



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PrimeEnergy Corporation

Consolidated Statement of Operations

Three Months Ended March 31, 2010 and 2009

(Unaudited)



|                                                              |  |      |            |      |   |            |  
|------------------------------------------------------------- |  | ---- | ---------- | ---- | - | ---------- | -
|                                                              |  | 2010 |            | 2009 |  
|Revenue:                                                      |  |      |            |      |   |            |  
|Oil and gas sales                                             |  | $    | 22,305,000 |      | $ | 16,038,000 |  
|Field service income                                          |  |      | 4,035,000  |      |   | 4,958,000  |  
|Administrative overhead fees                                  |  |      | 2,048,000  |      |   | 2,269,000  |  
|Gain on derivative instruments                                |  |      | 3,884,000  |      |   |           |  
|Other income                                                  |  |      | 75,000     |      |   | 12,000     |  
|                                                              |  |      |            |      |   |            |  
|Total revenue                                                 |  |      | 32,347,000 |      |   | 23,277,000 |  
|                                                              |  |      |            |      |   |            |  
|                                                              |  |     
|Costs and expenses:                                           |  |      |            |      |   |            |  
|Lease operating expense                                       |  |      | 8,869,000  |      |   | 8,227,000  |  
|Field service expense                                         |  |      | 3,268,000  |      |   | 4,065,000  |  
|Depreciation, depletion and amortization                      |  |      | 9,638,000  |      |   | 11,768,000 |  
|General and administrative expense                            |  |      | 3,032,000  |      |   | 2,857,000  |  
|Exploration costs                                             |  |      | 1,000      |      |   | 6,000      |  
|                                                              |  |      |            |      |   |            |  
|Total costs and expenses                                      |  |      | 24,808,000 |      |   | 26,923,000 |  
|                                                              |  |      |            |      |   |            |  
|Gain on sale and exchange of assets                           |  |      | 34,000     |      |   | 96,000     |  
|                                                              |  |      |            |      |   |            |  
|Income (loss) from operations                                 |  |      | 7,573,000  |      |   | (3,550,000 | )
|                                                              |  |     
|Other income and expenses:                                    |  |      |            |      |   |            |  
|Less: Interest expense                                        |  |      | 1,993,000  |      |   | 1,566,000  |  
|Add: Interest income                                          |  |      | 11,000     |      |   | 10,000     |  
|                                                              |  |      |            |      |   |            |  
|                                                              |  |     
|Income (loss) before provision (benefit) for income taxes     |  |      | 5,591,000  |      |   | (5,106,000 | )
|Provision (benefit) for income taxes                          |  |      | 1,709,000  |      |   | (1,623,000 | )
|                                                              |  |      |            |      |   |            |  
|Net income (loss)                                             |  |      | 3,882,000  |      |   | (3,483,000 | )
|                                                              |  |      |            |      |   |            |  
|                                                              |  |     
|Less: Net income attributable to the non-controlling interest |  |      | 442,000    |      |   | 15,000     |  
|                                                              |  |      |            |      |   |            |  
|Net income (loss) attributable to PrimeEnergy                 |  | $    | 3,440,000  |      | $ | (3,498,000 | )
|                                                              |  |      |            |      |   |            |  
|                                                              |  |     
|Basic income (loss) per common share                          |  | $    | 1.14       |      | $ | (1.15      | )
|                                                              |  |      |            |      |   |            |  
|                                                              |  |     
|Diluted income (loss) per common share                        |  | $    | .91        |      | $ | (1.15      | )
|                                                              |  |      |            |      |   |            |  

See accompanying notes to the consolidated financial statements.



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PrimeEnergy Corporation

Consolidated Statement of Stockholders Equity

Three Months Ended March 31, 2010

(Unaudited)



|                                           |  |              |  |                          |         |                  |   |                                            |  |   |                |  |   |                                      |   |  |                         |             |   |                          |   |            |   |  |   |            |   |  |   |            |  
|------------------------------------------ |  | ------------ |  | ------------------------ | ------- | ---------------- | - | ------------------------------------------ |  | - | -------------- |  | - | ------------------------------------ | - |  | ----------------------- | ----------- | - | ------------------------ | - | ---------- | - |  | - | ---------- | - |  | - | ---------- | -
|                                           |  | Common Stock |  | AdditionalPaid
inCapital |         | RetainedEarnings |   | AccumulatedOtherComprehensiveIncome (Loss) |  |   | Treasury Stock |  |   | TotalStockholdersEquityPrimeEnergy |   |  | Non-ControllingInterest |             |   | TotalStockholdersEquity |  
|                                           |  | Shares       |  | Amount                   |         |                  |   |                                            |  |   |               
|Balance at December 31, 2009               |  | 3,836,397    |  | $                        | 383,000 |                  | $ | 5,465,000                                  |  | $ | 43,725,000     |  | $ | (214,000                             | ) |  | $                       | (25,417,000 | ) |                          | $ | 23,942,000 |   |  | $ | 9,844,000  |   |  | $ | 33,786,000 |  
|Purchase 5,700 shares of common stock      |  |              |  |                          |         |                  |   |                                            |  |   |                |  |   |                                      |   |  |                         | (169,000    | ) |                          |   | (169,000   | ) |  |   |            |   |  |   | (169,000   | )
|Net income                                 |  |              |  |                          |         |                  |   |                                            |  |   | 3,440,000      |  |   |                                      |   |  |                         |             |   |                          |   | 3,440,000  |   |  |   | 442,000    |   |  |   | 3,882,000  |  
|Other comprehensive income, net of taxes   |  |              |  |                          |         |                  |   |                                            |  |   |                |  |   | 154,000                              |   |  |                         |             |   |                          |   | 154,000    |   |  |   |            |   |  |   | 154,000    |  
|Purchase of non-controlling interests      |  |              |  |                          |         |                  |   | 10,000                                     |  |   |                |  |   |                                      |   |  |                         |             |   |                          |   | 10,000     |   |  |   | (11,000    | ) |  |   | (1,000     | )
|Distributions to non-controlling interests |  |              |  |                          |         |                  |   |                                            |  |   |                |  |   |                                      |   |  |                         |             |   |                          |   |           |   |  |   | (59,000    | ) |  |   | (59,000    | )
|                                           |  |              |  |                          |         |                  |   |                                            |  |   |                |  |   |                                      |   |  |                         |             |   |                          |   |            |   |  |   |            |   |  |   |            |  
|Balance at March 31, 2010                  |  | 3,836,397    |  | $                        | 383,000 |                  | $ | 5,475,000                                  |  | $ | 47,165,000     |  | $ | (60,000                              | ) |  | $                       | (25,586,000 | ) |                          | $ | 27,377,000 |   |  | $ | 10,216,000 |   |  | $ | 37,593,000 |  
|                                           |  |              |  |                          |         |                  |   |                                            |  |   |                |  |   |                                      |   |  |                         |             |   |                          |   |            |   |  |   |            |   |  |   |            |  

See accompanying notes to the consolidated financial statements.



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PrimeEnergy Corporation

Consolidated Statement of Comprehensive Income



|                                                                                                       |  |                            |           |   |                            |   |            |  
|------------------------------------------------------------------------------------------------------ |  | -------------------------- | --------- | - | -------------------------- | - | ---------- | -
|                                                                                                       |  | Quarter EndedMarch 31,2010 |           |   | Quarter EndedMarch 31,2009 |  
|Net income (loss)                                                                                      |  | $                          | 3,882,000 |   |                            | $ | (3,483,000 | )
|                                                                                                       |  |                           
|Other comprehensive income (loss), net of taxes:                                                       |  |                            |           |   |                            |   |            |  
|Reclassification adjustment for settled contracts, net of taxes of $115,000 and $403,000, respectively |  |                            | 203,000   |   |                            |   | (716,000   | )
|Changes in fair value of hedge positions, net of taxes of $28,000 and $271,000, respectively           |  |                            | (49,000   | ) |                            |   | 482,000    |  
|                                                                                                       |  |                            |           |   |                            |   |            |  
|Total other comprehensive income (loss)                                                                |  |                            | 154,000   |   |                            |   | (234,000   | )
|                                                                                                       |  |                            |           |   |                            |   |            |  
|                                                                                                       |  |                           
|Comprehensive income (loss)                                                                            |  |                            | 4,036,000 |   |                            |   | (3,717,000 | )
|                                                                                                       |  |                            |           |   |                            |   |            |  
|Less: Comprehensive income attributable to non-controlling interest                                    |  |                            | 442,000   |   |                            |   | 15,000     |  
|                                                                                                       |  |                            |           |   |                            |   |            |  
|Comprehensive income (loss) attributable to PrimeEnergy                                                |  | $                          | 3,594,000 |   |                            | $ | (3,732,000 | )
|                                                                                                       |  |                            |           |   |                            |   |            |  

See accompanying notes to the consolidated financial statements.



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PrimeEnergy Corporation

Consolidated Statements of Cash Flows

Three Months Ended March 31, 2010 and 2009

(Unaudited)



|                                                                                         |  |      |             |   |      |   |             |  
|---------------------------------------------------------------------------------------- |  | ---- | ----------- | - | ---- | - | ----------- | -
|                                                                                         |  | 2010 |             |   | 2009 |  
|Cash flows from operating activities:                                                    |  |      |             |   |      |   |             |  
|Net income (loss)                                                                        |  | $    | 3,440,000   |   |      | $ | (3,498,000  | )
|Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |      |             |   |      |   |             |  
|Non-controlling interest in earnings of partnerships                                     |  |      | 442,000     |   |      |   | (15,000     | )
|Depreciation, depletion, amortization and accretion on discounted liabilities            |  |      | 9,638,000   |   |      |   | 11,768,000  |  
|Gain on sale of properties                                                               |  |      | (34,000     | ) |      |   | (96,000     | )
|Unrealized gain on derivative instruments                                                |  |      | (3,884,000  | ) |      |   |            |  
|Provision for deferred income taxes                                                      |  |      | 1,706,000   |   |      |   | (1,781,000  | )
|Changes in assets and liabilities:                                                       |  |      |             |   |      |   |             |  
|(Increase) decrease in accounts receivable                                               |  |      | 69,000      |   |      |   | 6,880,000   |  
|(Increase) decrease in due from related parties                                          |  |      | (35,000     | ) |      |   | 439,000     |  
|(Increase) decrease in inventories                                                       |  |      | 245,000     |   |      |   | 26,000      |  
|(Increase) decrease in prepaid expenses and other assets                                 |  |      | 170,000     |   |      |   | 142,000     |  
|Increase (decrease) in accounts payable                                                  |  |      | (1,786,000  | ) |      |   | (2,864,000  | )
|Increase (decrease) in accrued liabilities                                               |  |      | 677,000     |   |      |   | (212,000    | )
|Increase (decrease) in due to related parties                                            |  |      | 22,000      |   |      |   | 170,000     |  
|                                                                                         |  |      |             |   |      |   |             |  
|Net cash provided by operating activities                                                |  |      | 10,670,000  |   |      |   | 10,959,000  |  
|                                                                                         |  |      |             |   |      |   |             |  
|                                                                                         |  |     
|Cash flows from investing activities                                                     |  |      |             |   |      |   |             |  
|Capital expenditures, including exploration expense                                      |  |      | (3,468,000  | ) |      |   | (8,611,000  | )
|Proceeds from sale of properties and equipment                                           |  |      | 34,000      |   |      |   | 96,000      |  
|                                                                                         |  |      |             |   |      |   |             |  
|Net cash used in investing activities                                                    |  |      | (3,434,000  | ) |      |   | (8,515,000  | )
|                                                                                         |  |      |             |   |      |   |             |  
|                                                                                         |  |     
|Cash flows from financing activities                                                     |  |      |             |   |      |   |             |  
|Purchase of stock for treasury                                                           |  |      | (169,000    | ) |      |   | (225,000    | )
|Purchase of non-controlling interests                                                    |  |      | (1,000      | ) |      |   |            |  
|Increase in long-term bank debt and other long-term obligations                          |  |      | 15,422,000  |   |      |   | 20,520,000  |  
|Repayment of long-term bank debt and other long-term obligations                         |  |      | (23,262,000 | ) |      |   | (22,323,000 | )
|Distribution to non-controlling interest                                                 |  |      | (59,000     | ) |      |   | (631,000    | )
|                                                                                         |  |      |             |   |      |   |             |  
|Net cash used in financing activities                                                    |  |      | (8,069,000  | ) |      |   | (2,659,000  | )
|                                                                                         |  |      |             |   |      |   |             |  
|Net (decrease) in cash and cash equivalents                                              |  |      | (833,000    | ) |      |   | (215,000    | )
|                                                                                         |  |     
|Cash and cash equivalents at the beginning of the period                                 |  |      | 11,779,000  |   |      |   | 11,808,000  |  
|                                                                                         |  |      |             |   |      |   |             |  
|Cash and cash equivalents at the end of the period                                       |  | $    | 10,946,000  |   |      | $ | 11,593,000  |  
|                                                                                         |  |      |             |   |      |   |             |  
|Supplemental disclosures:                                                                |  |      |             |   |      |   |             |  
|Income taxes paid                                                                        |  | $    | 2,000       |   |      | $ | 148,000     |  
|Interest paid                                                                            |  | $    | 1,993,000   |   |      | $ | 1,566,000   |  

See accompanying notes
to the consolidated financial statements.



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##### Table of Contents

PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010

(1) Interim
Financial Statements:

The accompanying consolidated financial statements of PrimeEnergy Corporation (PEC), with
the exception of the consolidated balance sheet at December 31, 2009, have not been audited by independent public accountants. In accordance with applicable SEC rules and regulations, the accompanying interim financial statements do not include
all disclosures presented in annual financial statements and the reader should refer to the Companys Form 10-K for the year ended December 31, 2009 filed April 15, 2010. In the opinion of management, the accompanying interim
consolidated financial statements reflect all adjustments necessary to present fairly the financial position at March 31, 2010 and the results of operations and cash flows for the three months ended March 31, 2010 and 2009. All such
adjustments are of a normal recurring nature. Certain amounts presented in prior period financial statements have been reclassified for consistency with current period presentation. The results for interim periods are not necessarily indicative
of annual results. For purposes of disclosure in the consolidated financial statements, subsequent events have been evaluated through May 17, 2010, the date the statements were issued.

Recently Adopted Accounting Standards

In January 2010, the Financial Accounting Standards Board (FASB) issued an Accounting Standards Update (ASU), Oil and Gas Reserve
Estimation and Disclosures, which aligns the FASBs oil and gas reserve estimation and disclosure requirements with the requirements in SEC Release No. 33-8955, Modernization of Oil and Gas Reporting Requirements (the
Release) issued in December 2008. The ASU is effective for reporting periods ending on or after December 31, 2009. The provisions include changes to pricing used to estimate reserves (with the use of an average of the
first-day-of-the-month price for the 12-month period, rather than a year-end price for determining whether reserves can be produced economically), an expanded definition of oil and gas producing activities to include nontraditional resources, and
amended definitions of key terms such as reliable technology and reasonable certainty which are used in estimating proved oil and gas reserve quantities. The primary objectives of the revisions are to increase the
transparency and information value of reserve disclosures and improve comparability among oil and gas companies. The adoption of these requirements did not significantly impact the reported value of the Companys reserves or its financial
statements.

In February 2010, the FASB issued authoritative guidance on subsequent events that removes the requirement for an
SEC filer to disclose the date through which subsequent events have been evaluated in both issued and revised financial statements. This guidance was effective upon issuance. The adoption of the subsequent events standard had no impact on our
consolidated financial position, results of operations or cash flows.

In January 2010, the FASB issued changes clarifying
existing disclosure requirements for fair value measurements and requiring gross presentation of activities within the reconciliation for the period, whereby entities must present separately information about purchases, sales, issuances and
settlements. The update also added a new requirement to disclose fair value transfers in and out of Levels 1 and 2 and describe the reasons for the transfers. These changes were effective for financial statements issued for the first interim or
annual reporting period beginning after December 15, 2009, except for gross presentation of the Level 3 reconciliation for the period, which will become effective for annual reporting periods beginning after December 15, 2010. There was no
impact on the Companys consolidated financial position, results of operations or cash flows as a result of the adoption of the required provisions.

(2) Acquisitions and Dispositions

Historically the Company has repurchased the interests of the partners and trust unit holders in certain of the Partnerships, which
consist primarily of oil and gas interests. The Company purchased such interests in an amount totaling $1,000 for the three months ended March 31, 2010. There were no purchases of such interests for the three months ended March 31, 2009.

(3) Restricted Cash and Cash Equivalents:

Restricted cash and cash equivalents include $5,019,000 and $5,497,000 at March 31, 2010 and December 31, 2009, respectively, of
cash primarily pertaining to oil and gas revenue payments. There were corresponding accounts payable recorded at March 31, 2010 and December 31, 2009 for these liabilities. Both the restricted cash and the accounts payable are classified
as current on the accompanying balance sheet.



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PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010



(4) Additional Balance Sheet Information

Certain balance sheet amounts are comprised of the following:



|                                      |  |                |            |                   |   |           
|------------------------------------- |  | -------------- | ---------- | ----------------- | - | ----------
|                                      |  | March 31, 2010 |            | December 31, 2009
|Accounts Receivable:                  |  |                |            |                   |   |           
|Joint interest billing                |  | $              | 2,079,000  |                   | $ | 2,411,000 
|Trade receivables                     |  |                | 1,501,000  |                   |   | 1,565,000 
|Oil and gas sales                     |  |                | 8,153,000  |                   |   | 7,774,000 
|Refundable prior years income taxes   |  |                | 2,426,000  |                   |   | 2,466,000 
|Other                                 |  |                | 53,000     |                   |   | 83,000    
|                                      |  |                |            |                   |   |           
|                                      |  |                | 14,212,000 |                   |   | 14,299,000
|Less: Allowance for doubtful accounts |  |                | 445,000    |                   |   | 423,000   
|                                      |  |                |            |                   |   |           
|                                      |  |               
|Total                                 |  | $              | 13,767,000 |                   | $ | 13,876,000
|                                      |  |                |            |                   |   |           
|                                      |  |               
|Accounts Payable:                     |  |                |            |                   |   |           
|Trade                                 |  | $              | 4,254,000  |                   | $ | 5,862,000 
|Royalty and other owners              |  |                | 8,825,000  |                   |   | 9,920,000 
|Other                                 |  |                | 5,949,000  |                   |   | 5,509,000 
|                                      |  |                |            |                   |   |           
|                                      |  |               
|Total                                 |  | $              | 19,028,000 |                   | $ | 21,291,000
|                                      |  |                |            |                   |   |           
|                                      |  |               
|Accrued Liabilities:                  |  |                |            |                   |   |           
|Compensation and related expenses     |  | $              | 2,357,000  |                   | $ | 2,009,000 
|Property costs                        |  |                | 1,074,000  |                   |   | 2,137,000 
|Income tax                            |  |                | 229,000    |                   |   | 170,000   
|Other                                 |  |                | 1,747,000  |                   |   | 1,669,000 
|                                      |  |                |            |                   |   |           
|Total                                 |  | $              | 5,407,000  |                   | $ | 5,985,000 
|                                      |  |                |            |                   |   |           

(5) Property and Equipment:

Property and equipment at March 31, 2010 and December 31, 2009 consisted of the following:



|                                             |  |               |             |                  |   |            
|-------------------------------------------- |  | ------------- | ----------- | ---------------- | - | -----------
|                                             |  | March 31,2010 |             | December 31,2009
|Proved oil and gas properties, at cost       |  | $             | 443,170,000 |                  | $ | 441,035,000
|Unproved oil and gas properties, at cost     |  |               | 1,322,000   |                  |   | 1,322,000  
|Less: Accumulated depletion and depreciation |  |               | 277,488,000 |                  |   | 268,514,000
|                                             |  |               |             |                  |   |            
|                                             |  | $             | 167,004,000 |                  | $ | 173,843,000
|                                             |  |              
|Field service equipment and other            |  |               | 19,555,000  |                  |   | 19,462,000 
|Less: Accumulated depreciation               |  |               | 12,401,000  |                  |   | 12,199,000 
|                                             |  |               |             |                  |   |            
|                                             |  | $             | 7,154,000   |                  | $ | 7,263,000  
|                                             |  |               |             |                  |   |            
|Total net property and equipment             |  | $             | 174,158,000 |                  | $ | 181,106,000
|                                             |  |               |             |                  |   |            

(6) Long-Term Bank Debt:

Prior to August 21, 2009 the Companys long-term debt consisted of an onshore facility owed to a syndicate of banks and an
offshore facility owed to one principal lender. The agent for the syndicate of banks and principal lender was Guaranty Bank. On August 21, 2009, Guaranty Bank was closed by the Office of Thrift Suspension. Subsequently, the Federal Deposit
Insurance Corporation (FDIC) was named Receiver. Loan administration and all deposit accounts were transferred to BBVA Compass from the FDIC at that time. BBVA Compass became the agent for the syndicate of banks holding the onshore credit facility
and the lender for the offshore facility.

The Company has revolving lines of credit up to a total of $360 million, consisting
of a $200 million credit facility (the offshore facility) and a $160 million credit facility through a syndicate of banks (the onshore facility). The offshore facilitys maturity date is October 1, 2010 and the onshore credit facility
matures April 1, 2011. Availability under the credit facilities is based on the loan value assigned to PECs oil and gas properties. The determination of the borrowing base is made by the lenders taking into consideration the estimated
value of PECs oil and gas properties in accordance with the lenders customary practices for oil and gas loans. This process involves reviewing PECs estimated proved reserves and their valuation. The borrowing base is re-determined
semi-annually, and the available borrowing amount could be increased or decreased as a result of such redetermination. In addition, PEC and the lenders each have discretion at any time to have the borrowing base re-determined. A revision to
PECs reserves may prompt such a request on the part of the lenders, which could possibly result in a reduction in the borrowing base and availability under the credit facilities. If outstanding borrowings under either of the credit facilities
exceed the applicable portion of the borrowing base, PEC would be required to repay the excess amount within a prescribed period. If the Company is unable to pay the excess amount, it would cause an event of default.



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PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010



The credit facilities include terms and covenants that require the Company to maintain a
minimum current ratio, tangible net worth, debt coverage ratio and interest coverage ratio, as defined, and restrictions are placed on the payment of dividends and the amount of treasury stock the Company may purchase. The credit facilities are
collateralized by substantially all of the Companys assets. The Company is required to mortgage, and grant a security interest in, consolidated proved oil and gas properties. PEC also pledged the stock of several subsidiaries to the lenders to
secure the credit facilities.

As of March 31, 2010, the onshore facilities borrowing base was $100 million. As of
March 31, 2010 the offshore facilities borrowing base was $5.5 million with a monthly reduction of $500 thousand which began in August 2009. The Companys borrowing rates in both facilities have a floor of 2% plus applicable margin rates
that vary from 3% to 5% depending on which facility, the value of current borrowings and the actual available borrowing base. On March 1, 2010, the Company amended its onshore credit facility to formally include BBVA Compass as agent of the
syndicate of banks holding the facility. Also included in this amendment is a reduction to the availability of the borrowing base which will begin June 1, 2010 in the amount of $2 million.

At March 31, 2010, the outstanding balance of the Companys bank debt was $81.33 million under the onshore credit facility, with
an additional availability of $18.67 million at a weighted average interest rate of 6.86%. Under the offshore credit facility the outstanding balance was $5.5 million, with no further availability, at a weighted average interest rate of 6.07%. Total
outstanding bank debt was $86.83 million at March 31, 2010. The combined weighted average interest rates paid on outstanding bank borrowings subject to interest at the banks base rate and on outstanding bank borrowings bearing interest
based upon the LIBO rate were 6.09% during 2010 as compared to 4.43% during 2009.

The Company entered into interest rate hedge
agreements to help manage interest rate exposure. These contracts include interest rate swaps. Interest rate swap transactions generally involve the exchange of fixed and floating rate interest payment obligations without the exchange of the
underlying principal amounts. The Company entered into interest swap agreements for a period of two years, which commenced in April 2008, related to $60 million of Company bank debt resulting in a fixed rate of 2.375% plus the Companys current
applicable margin. The underlying debt contracts above are re-priced quarterly based upon the three-month LIBO rates, the Companys floor of 2% and the applicable margin per the onshore credit facility. Subsequent to March 31, 2010, these
interest swap agreements expired in April 2010, and they have not been replaced.

Indebtedness to related
partiesnon-current:

During the second quarter 2008, the Companys offshore subsidiary entered into a subordinated
credit facility with a private lender with an availability of $50 million. The private lender has specific collateral pledged under a separate credit agreement. The private lender is controlled by a director of the Company. Effective June 30,
2009, the private lender agreed to release the pledged collateral under this credit facility in favor of the offshore credit facility in exchange for a second lien position on all of the assets of the offshore subsidiary and a pledge from PEC to pay
the outstanding balance under the facility in full after PECs current bank debt is paid off and not take on any additional debt on its existing asset base. This amended facility will mature in January 2012, which will be accelerated if there
is a change in control or management of PrimeEnergy Corporation, and bears interest at a rate of 10% per annum. As of March 31, 2010 advances from this facility amounted to $20 million.



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##### Table of Contents

PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010



(7) Other Long-Term Obligations and Commitments:

Operating Leases:

The Company has several non-cancelable operating leases, primarily for rental of office space, that have a term of more than one year. The
future minimum lease payments for the rest of the fiscal 2010 and thereafter for the operating leases are as follows.



|                       |  |                  |          
|---------------------- |  | ---------------- | ---------
|                       |  | Operating Leases
|2010                   |  | $                | 566,000  
|2011                   |  |                  | 384,000  
|2012                   |  |                  | 121,000  
|                       |  |                  |          
|Total minimum payments |  | $                | 1,071,000
|                       |  |                  |          

Rent expense for office space for the three months
ended March 31, 2010 and 2009 was $214,000 and $123,000, respectively.

Asset Retirement Obligation:

A reconciliation of the liability for plugging and abandonment costs for the three months ended March 31, 2010 is as follows:



|                                                |  |   |            |  
|----------------------------------------------- |  | - | ---------- | -
|Asset retirement obligation  December 31, 2009 |  | $ | 19,366,000 |  
|Liabilities incurred                            |  |   |           |  
|Liabilities settled                             |  |   | (292,000   | )
|Accretion expense                               |  |   | 227,000    |  
|Revisions in estimated liabilities              |  |   | 309,000    |  
|                                                |  |   |            |  
|Asset retirement obligation  March 31, 2010    |  | $ | 19,610,000 |  
|                                                |  |   |            |  

The Companys liability is determined using significant assumptions, including current estimates of
plugging and abandonment costs, annual inflation of these costs, the productive life of wells and a risk-adjusted interest rate. Changes in any of these assumptions can result in significant revisions to the estimated asset retirement obligation.
Revisions to the asset retirement obligation are recorded with an offsetting change to producing properties, resulting in prospective changes to depreciation, depletion and amortization expense and accretion of discount. Because of the subjectivity
of assumptions and the relatively long life of most of the Companys wells, the costs to ultimately retire the wells may vary significantly from previous estimates.

(8) Contingent Liabilities:

The Company, as managing general partner of the affiliated Partnerships, is responsible for all Partnership activities, including the
drilling of development wells and the production and sale of oil and gas from productive wells. The Company also provides the administration, accounting and tax preparation work for the Partnerships, and is liable for all debts and liabilities of
the affiliated Partnerships, to the extent that the assets of a given limited Partnership are not sufficient to satisfy its obligations. As of March 31, 2010, the affiliated Partnerships have established cash reserves in excess of their debts
and liabilities and the Company believes these reserves will be sufficient to satisfy Partnership obligations.

The Company is
subject to environmental laws and regulations. Management believes that future expenses, before recoveries from third parties, if any, will not have a material effect on the Companys financial condition. This opinion is based on expenses
incurred to date for remediation and compliance with laws and regulations, which have not been material to the Companys results of operations.

From time to time, the Company is party to certain legal actions arising in the ordinary course of business. While the outcome of these
events cannot be predicted with certainty, management does not expect these matters to have a materially adverse effect on the financial position or results of operations of the Company.

(9) Stock Options and Other Compensation:

In May 1989, non-statutory stock options were granted by the Company to four key executive officers for the purchase of shares of common
stock. At March 31, 2010 and 2009, options on 767,500 shares were outstanding and exercisable at prices ranging from $1.00 to $1.25. According to their terms, the options have no expiration date.



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##### Table of Contents

PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010



(10) Related Party Transactions:

The Company, as managing general partner or managing trustee, makes an annual offer to repurchase the interests of the partners and trust
unit holders in certain of the Partnerships or Trusts. The Company purchased such interests in an amount totaling $1,000 for the three months ended March 31, 2010. There were no purchases of such interests for the three months ended
March 31, 2009.

Treasury stock purchases in any reported period may include shares from a related party. Purchases from
related parties during the first quarter of 2010 included 2,000 shares purchased for a total consideration of $70,000. There were no related party treasury stock purchases during the three months ended March 31, 2009.

Receivables from related parties consist of reimbursable general and administrative costs, lease operating expenses and reimbursement for
property development and related costs. These receivables are due from joint venture partners, which may include members of the Companys Board of Directors.

Payables owed to related parties primarily represent receipts collected by the Company as agent for the joint venture partners, which may
include members of the Companys Board of Directors, for oil and gas sales net of expenses. Also included in due to related parties is the amount of accrued interest owed to a related party, a company controlled by a director of the Company,
with whom the Companys offshore subsidiary entered into a credit agreement. The agreement provides for a loan of $20 million at a rate of 10% per annum and is secured by a second lien position of all the assets of the offshore subsidiary.
Included at each of March 31, 2010 and December 31, 2009 was $170,000 of accrued interest on the related party loan.

(11) Financial
Instruments

Fair Value measurements:

Authoritative guidance on fair value measurements defines fair value, establishes a framework for measuring fair value and stipulates the
related disclosure requirements. The Company follows a three-level hierarchy, prioritizing and defining the types of inputs used to measure fair value. The fair values of the Companys interest rate swaps, natural gas and crude oil price
collars and swaps are designated as Level 3. The following fair value hierarchy table presents information about the Companys assets and liabilities measured at fair value on a recurring basis as of March 31, 2010 and December 31,
2009:



|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|---------------------------------- |  | ----------------------------------------------------------- |  | ------------------------------------------ |  | --------------------------------------- | ---------- | - | ----------------------------- | - | ---------- | -
|                                   |  | Quoted Prices inActive MarketsFor IdenticalAssets (Level 1) |  | SignificantOtherObservableInputs (Level 2) |  | SignificantUnobservableInputs (Level 3) |            |   | Balance as ofMarch 31,2010    |  
|Assets                             |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Commodity derivative contracts     |  |                                                            |  |                                           |  | $                                       | 3,943,000  |   |                               | $ | 3,943,000  |  
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Total assets                       |  |                                                            |  |                                           |  | $                                       | 3,943,000  |   |                               | $ | 3,943,000  |  
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Liabilities                        |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Commodity derivative contracts     |  |                                                            |  |                                           |  | $                                       | (4,024,000 | ) |                               | $ | (4,024,000 | )
|                                   |  |                                                             |  |                                           
|Interest rate derivative contracts |  |                                                            |  |                                           |  |                                         | (93,000    | ) |                               |   | (93,000    | )
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Total liability                    |  |                                                            |  |                                           |  | $                                       | (4,117,000 | ) |                               | $ | (4,117,000 | )
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|                                   |  | Quoted Prices inActive MarketsFor IdenticalAssets (Level 1) |  | SignificantOtherObservableInputs (Level 2) |  | SignificantUnobservableInputs (Level 3) |            |   | Balance as ofDecember 31,2009 |  
|Assets                             |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Commodity derivative contracts     |  |                                                            |  |                                           |  | $                                       | 879,000    |   |                               | $ | 879,000    |  
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Total assets                       |  |                                                            |  |                                           |  | $                                       | 879,000    |   |                               | $ | 879,000    |  
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Liabilities                        |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Commodity derivative contracts     |  |                                                            |  |                                           |  | $                                       | (4,845,000 | ) |                               | $ | (4,845,000 | )
|                                   |  |                                                             |  |                                           
|Interest rate derivative contracts |  |                                                            |  |                                           |  |                                         | (335,000   | ) |                               |   | (335,000   | )
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  
|                                   |  |                                                             |  |                                           
|Total liability                    |  |                                                            |  |                                           |  | $                                       | (5,180,000 | ) |                               | $ | (5,180,000 | )
|                                   |  |                                                             |  |                                            |  |                                         |            |   |                               |   |            |  



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PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010



The following table sets forth a reconciliation of changes in the fair value of
financial assets and liabilities classified as level 3 in the fair value hierarchy for the three months ended March 31, 2010.



|                                                 |  |   |            |  
|------------------------------------------------ |  | - | ---------- | -
|Net assets (liabilities)December 31, 2009       |  | $ | (4,301,000 | )
|Total realized and unrealized gains or losses:   |  |   |            |  
|Included in earnings (a)                         |  |   | 3,925,000  |  
|Included in other comprehensive income           |  |   | 445,000    |  
|Purchases, sales, issuances and settlements, net |  |   | (243,000   | )
|                                                 |  |   |            |  
|Net assets (liabilities)March 31, 2010          |  | $ | (174,000   | )
|                                                 |  |   |            |  



|(a) | Amounts reported in net income are classified as oil and gas sales for commodity derivative instruments reported as cash flow hedges prior to July 1, 2009 and as a
reduction to interest expense for interest rate swap instruments. Derivative instruments for periods after July 1, 2009 are reported in oil and gas sales as realized gain/loss and on a separately reported line item captioned unrealized
gain/loss on derivative instruments.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Assuming no change in interest prices, after March 31, 2010, the
Company would expect to reclassify to the statement of operations, over the next twelve months, $60,000 in after-tax loss associated with interest rate swaps. This reclassification represents the net short-term payable associated with open swaps
currently not reflected in earnings at March 31, 2010 related to anticipated interest expense.

Derivative
Instruments:

In March 2008, the FASB issued guidance and amended the disclosure requirements for derivative and
hedging activities. Entities are now required to provide greater transparency about how and why the entity uses derivative instruments, how the instruments and related hedged items are accounted for and how the instruments and related hedged items
affect the financial position, results of operations and cash flows of the entity.

The Company is exposed to commodity price
and interest rate risk, and management considers periodically the Companys exposure to cash flow variability resulting from the commodity price changes and interest rate fluctuations. Futures, swaps and options are used to manage the
Companys exposure to commodity price risk inherent in the Companys oil and gas production operations. The Company does not apply hedge accounting to any of its commodity based derivatives. The application of hedge accounting for
commodities was discontinued for periods after July 1, 2009. As a result, both realized and unrealized gains and losses associated with derivative instruments are recognized in earnings. If the derivatives previously reported as cash flow
hedges had losses or gains not yet settled, these items would be reported in accumulated other comprehensive income until settlement occurs and reclassified appropriately from accumulated other comprehensive income into the statement of operations.

Interest rate swaps derivatives continue to be treated as cash-flow hedges and are used to fix or float interest rates on
existing debt. The value of these interest rate swaps at March 31, 2010 is located in accumulated other comprehensive income and settlement of the swaps is recorded within interest expense.

Effect of derivative instruments on the consolidated balance sheet:



|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|-------------------------------------------------- |  | ------------------------------- |  | -------------- | ---------- | - | ----------------- | - | ---------- | -
|                                                   |  |                                 |  | Fair Value     |           
|                                                   |  | Balance Sheet Location          |  | March 31, 2010 |            |   | December 31, 2009 |  
|Asset Derivatives:                                 |  |                                 |  |                |            |   |                   |   |            |  
|Derivatives designated as hedging instruments:     |  |                                 |  |                |            |   |                   |   |            |  
|Crude oil commodity contracts                      |  | Current derivative contracts    |  | $              |           |   |                   | $ |           |  
|Crude oil commodity contracts                      |  | Other assets                    |  |                |           |   |                   |   |           |  
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Total                                              |  |                                 |  | $              |           |   |                   | $ |           |  
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Derivatives not designated as hedging instruments: |  |                                 |  |                |            |   |                   |   |            |  
|Natural gas commodity contracts                    |  | Current derivative contracts    |  | $              | 3,417,000  |   |                   | $ | 657,000    |  
|Natural gas commodity contracts                    |  | Other assets                    |  |                | 526,000    |   |                   |   | 222,000    |  
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Total                                              |  |                                 |  | $              | 3,943,000  |   |                   | $ | 879,000    |  
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Liability Derivatives:                             |  |                                 |  |                |            |   |                   |   |            |  
|Derivatives designated as hedging instruments:     |  |                                 |  |                |            |   |                   |   |            |  
|Interest rate swap derivatives                     |  | Derivative liability short term |  | $              | (93,000    | ) |                   | $ | (335,000   | )
|Interest rate swap derivatives                     |  | Derivative liability long term  |  |                |           |   |                   |   |           |  
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Total                                              |  |                                 |  | $              | (93,000    | ) |                   | $ | (335,000   | )
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Derivatives not designated as hedging instruments: |  |                                 |  |                |            |   |                   |   |            |  
|Crude oil commodity contracts                      |  | Derivative liability short term |  | $              | (2,412,000 | ) |                   | $ | (1,953,000 | )
|Crude oil commodity contracts                      |  | Derivative liability long term  |  |                | (1,612,000 | ) |                   |   | (2,892,000 | )
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Total                                              |  |                                 |  | $              | (4,024,000 | ) |                   | $ | (4,845,000 | )
|                                                   |  |                                 |  |                |            |   |                   |   |            |  
|Total derivative instruments                       |  |                                 |  | $              | (174,000   | ) |                   | $ | (4,301,000 | )
|                                                   |  |                                 |  |                |            |   |                   |   |            |  



14



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##### Table of Contents

PrimeEnergy Corporation

Notes to Consolidated Financial Statements

March 31, 2010



Effect of derivative instruments on the consolidated statement of operations for the quarterly periods
ended March 31, 2010 and 2009:



|                                                          |  |                                                        |      |                                                                 |           |      |  |   |           |  
|--------------------------------------------------------- |  | ------------------------------------------------------ | ---- | --------------------------------------------------------------- | --------- | ---- |  | - | --------- | -
|                                                          |  | Location of gain/loss reclassifiedfrom OCI into income |      | Amount of gain/lossreclassified from accumulatedOCI into
income |          
|                                                          |  |                                                        | 2010 |                                                                 |           | 2009 | 
|Derivatives designated as cash-flow hedges                |  |                                                        |      |                                                                 |           |      |  |   |           |  
|Interest rate swap derivatives                            |  | Interest expense                                       |      | $                                                               | (318,000  | )    |  | $ | (108,000  | )
|Crude oil commodity contracts                             |  | Oil and gas sales                                      |      |                                                                 |          |      |  |   | 1,227,000 |  
|                                                          |  |                                                        |      |                                                                 |           |      |  |   |           |  
|                                                          |  |                                                        |      | $                                                               | (318,000  | )    |  | $ | 1,119,000 |  
|                                                          |  |                                                        |      |                                                                 |           |      |  |   |           |  
|                                                          |  |                                                       
|                                                          |  | Location of gain/loss recognizedin income              |      | Amount of gain/lossrecognized in income                         |          
|                                                          |  |                                                        | 2010 |                                                                 |           | 2009 | 
|Derivatives not designated as cash-flow hedge instruments |  |                                                        |      |                                                                 |           |      |  |   |           |  
|Natural gas commodity contracts                           |  | Gain on derivative instruments                         |      | $                                                               | 3,064,000 |      |  | $ |          |  
|Crude oil commodity contracts                             |  | Gain on derivative instruments                         |      |                                                                 | 821,000   |      |  |   |          |  
|Natural gas commodity contracts                           |  | Oil and gas sales                                      |      |                                                                 | 460,000   |      |  |   |          |  
|Crude oil commodity contracts                             |  | Oil and gas sales                                      |      |                                                                 | (7,000    | )    |  |   |          |  
|                                                          |  |                                                        |      |                                                                 |           |      |  |   |           |  
|                                                          |  |                                                        |      | $                                                               | 4,338,000 |      |  | $ |          |  
|                                                          |  |                                                        |      |                                                                 |           |      |  |   |           |  

(12) Earnings (Loss) Per Share:

Basic earnings (loss) per share are computed by dividing earnings (loss) available to common stockholders by the weighted average number
of common shares outstanding during the period. Diluted earnings per share reflect per share amounts that would have resulted if dilutive potential common stock had been converted to common stock in gain periods. The following reconciles
amounts reported in the financial statements:



|                                           |  |                                   |           |                                           |           |                 |   |          |  |   |                                           |   |                 |           |  |   |       |  
|------------------------------------------ |  | --------------------------------- | --------- | ----------------------------------------- | --------- | --------------- | - | -------- |  | - | ----------------------------------------- | - | --------------- | --------- |  | - | ----- | -
|                                           |  | Three Months Ended March 31, 2010 |           | Three Months Ended March 31, 2009         |          
|                                           |  | Net Income                        |           | WeightedAverageNumber ofSharesOutstanding |           | Per ShareAmount |   | Net Loss |  |   | WeightedAverageNumber ofSharesOutstanding |   | Per ShareAmount |          
|Net income (loss) per common share         |  | $                                 | 3,440,000 |                                           | 3,028,993 |                 | $ | 1.14     |  | $ | (3,498,000                                | ) |                 | 3,044,745 |  | $ | (1.15 | )
|Effect of dilutive securities:             |  |                                   |           |                                           |           |                 |   |          |  |   |                                           |   |                 |           |  |   |       |  
|Options (a)                                |  |                                   |           |                                           | 739,725   |                 |   |          |  |   |                                           |   |                 |           |  |   |       |  
|                                           |  |                                   |           |                                           |           |                 |   |          |  |   |                                           |   |                 |           |  |   |       |  
|Diluted net income (loss) per common share |  | $                                 | 3,440,000 |                                           | 3,768,718 |                 | $ | .91      |  | $ | (3,498,000                                | ) |                 | 3,044,745 |  | $ | (1.15 | )
|                                           |  |                                   |           |                                           |           |                 |   |          |  |   |                                           |   |                 |           |  |   |       |  



|(a) | The dilutive effect of 767,500 outstanding stock purchase options is not considered for the three months ended March 31, 2009, due to the loss incurred for such
period.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

|Item 2. | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
|------- | -------------------------------------------------------------------------------------

This discussion should be read in conjunction with the consolidated financial statements of the Company and notes thereto.

LIQUIDITY AND CAPITAL RESOURCES

Cash flow
provided by operations for the three month period ended March 31, 2010 was $10,670,000. Excluding the effects of significant unforeseen expenses or other income, our cash flow from operations fluctuates primarily because of variations in oil
and gas production and prices or changes in working capital accounts. Our oil and gas production will vary based on actual well performance but may be curtailed due to factors beyond our control. Hurricanes in the Gulf of Mexico may shut down our
production for the duration of the storms presence in the Gulf or damage production facilities so that we cannot produce from a particular property for an extended amount of time. In addition, downstream activities on major pipelines in the
Gulf of Mexico can also cause us to shut-in production for various lengths of time.

Our realized oil and gas prices vary due to world
political events, supply and demand of products, product storage levels, and weather patterns. We sell the vast majority of our production at spot market prices. Accordingly, product price volatility will affect our cash flow from operations. To
mitigate price volatility we sometimes lock in prices for some portion of our production through the use of financial instruments.

The
Companys activities include development and exploratory drilling. The Companys strategy is to develop a balanced portfolio of drilling prospects that includes lower risk wells with a high probability of success and higher risk wells with
greater economic potential. The Company plans on drilling in excess of 20 wells, mainly in the Permian Basin in West Texas.

The
Companys strategy in 2010 is to continue to reduce its outstanding debt which decreased by approximately $10,000,000 in 2009 and $7,000,000 in the first quarter of 2010. This decreased leveraged position will better provide the Company the
ability to participate in a significant acquisition, should the opportunity arise this year.

The Company has in place both a stock repurchase
program and a limited partnership interest repurchase program. Spending under these programs in 2009 was $565,000. The Company expects to continue spending under the programs in 2010. During the first quarter of 2010 the Company spent $170,000 under
these programs.

The Company currently maintains two credit facilities totaling $360 million, with a combined current borrowing base of $105.5
million. The bank reviews the borrowing base semi-annually and, at their discretion, may decrease or propose an increase to the borrowing base relative to a redetermined estimate of proved oil and gas reserves. Our oil and gas properties are
pledged as collateral for the line of credit and we are subject to certain financial covenants defined in the agreement. We are currently in compliance with these financial covenants. If we do not comply with these covenants on a continuing basis,
the lenders have the right to refuse to advance additional funds under the facility and/or declare all principal and interest immediately due and payable.

The Companys offshore subsidiary maintains a subordinated credit facility with a private lender controlled by a director of the Company. The
facility provides availability of $50 million and is secured by properties released by the bank and pledged under this agreement. The current advances under this credit facility are $20 million due January 2012.

It is the goal of the Company to increase its oil and gas reserves and production through the acquisition and development of oil and gas properties. The
Company also continues to explore and consider opportunities to further expand its oilfield servicing revenues through additional investment in field service equipment. However, the majority of the Companys capital spending is discretionary,
and the ultimate level of expenditures will be dependent on the Companys assessment of the oil and gas business environment, the number and quality of oil and gas prospects available, the market for oilfield services, and oil and gas business
opportunities in general.



16



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##### Table of Contents

|Item 2. | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (CONTINUED)
|------- | -------------------------------------------------------------------------------------------------



RESULTS OF OPERATIONS

Revenues and net income during the three month period ended March 31, 2010, as compared to the same period in 2009 reflect the increased oil and gas
sales, presented below, offset by depreciation and depletion of oil and gas properties. The table summarizes production volumes and average sales prices realized (including realized gains and losses from derivatives).



|                        |  |                              |            |      |   |                      |  |   |           |  
|----------------------- |  | ---------------------------- | ---------- | ---- | - | -------------------- |  | - | --------- | -
|                        |  | Three Months Ended March 31, |           
|                        |  | 2010                         |            | 2009 |   | Increase /(Decrease) | 
|Barrels of Oil Produced |  |                              | 160,000    |      |   | 172,000              |  |   | (12,000   | )
|Average Price Received  |  | $                            | 75.06      |      | $ | 44.10                |  | $ | 30.96     |  
|                        |  |                              |            |      |   |                      |  |   |           |  
|Oil Revenue             |  | $                            | 12,010,000 |      | $ | 7,575,000            |  | $ | 4,435,000 |  
|                        |  |                              |            |      |   |                      |  |   |           |  
|Mcf of Gas Produced     |  |                              | 1,538,000  |      |   | 1,871,000            |  |   | (333,000  | )
|Average Price Received  |  | $                            | 6.69       |      | $ | 4.52                 |  | $ | 2.17      |  
|                        |  |                              |            |      |   |                      |  |   |           |  
|Gas Revenue             |  | $                            | 10,295,000 |      | $ | 8,463,000            |  | $ | 1,832,000 |  
|                        |  |                              |            |      |   |                      |  |   |           |  
|Total Oil & Gas Revenue |  | $                            | 22,305,000 |      | $ | 16,038,000           |  | $ | 6,267,000 |  
|                        |  |                              |            |      |   |                      |  |   |           |  

Oil and gas prices received excluding the impact of derivatives were:



|          |  |                              |       |      |   |                      |  |   |      
|--------- |  | ---------------------------- | ----- | ---- | - | -------------------- |  | - | -----
|          |  | Three Months Ended March 31,
|          |  | 2010                         |       | 2009 |   | Increase /(Decrease)
|Oil Price |  | $                            | 75.11 |      | $ | 36.96                |  | $ | 38.15
|Gas Price |  | $                            | 6.39  |      | $ | 4.52                 |  | $ | 1.87 

The decrease in oil production
reflects properties added during 2009 from our 2009 West Texas drilling program offset by the natural decline of existing properties. The decrease in gas production is primarily due to the natural decline of the offshore properties.

Lease operating expense for the three months of 2010 increased by $642,000 or 7.8 % compared to 2009 due to increased production taxes related to
higher commodity prices.

General and administrative expenses increased $175,000 in the first three months of 2010 or 6.1% as compared to 2009
primarily due to increased rent and engineering expenses.

Field service income for the three months of 2010 decreased $923,000 or 18.6%
compared to 2009. Field service expense for the three month of 2010 decreased $797,000 or 19.6% compared to 2009. These changes reflect decreased utilization and rates in South Texas and Oklahoma offset by increases in West Texas.

Depreciation, depletion and amortization expense decreased to $9,638,000 in 2010 from $11,768,000 in 2009 or 18.1%. This decrease is primarily related to
the decrease in offshore production during the first quarter of 2010.

This Report contains forward-looking statements that are based on
managements current expectations, estimates and projections. Words such as expects, anticipates, intends, plans, believes, projects and estimates, and
variations of such words and similar expressions are intended to identify such forward-looking statements. These statements constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, and
are subject to the safe harbors created thereby. These statements are not guarantees of future performance and involve risks and uncertainties and are based on a number of assumptions that could ultimately prove inaccurate and, therefore, there
can be no assurance that they will prove to be accurate. Actual results and outcomes may vary materially from what is expressed or forecast in such statements due to various risks and uncertainties. These risks and uncertainties include, among
other things, the possibility of drilling cost overruns and technical difficulties, volatility of oil and gas prices, competition, risks inherent in the Companys oil and gas operations, the inexact nature of interpretation of seismic and other
geological and geophysical data, imprecision of reserve estimates, and the Companys ability to replace and expand oil and gas reserves. Accordingly, stockholders and potential investors are cautioned that certain events or circumstances could
cause actual results to differ materially from those projected.



17



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##### Table of Contents

|Item 3. | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
|------- | ----------------------------------------------------------

The Company is a smaller reporting company and no response is required pursuant to this Item.



|Item 4. | CONTROLS AND PROCEDURES
|------- | -----------------------

As of the end of the
current reported period covered by this report, the Company carried out an evaluation, under the supervision and with the participation of the Companys management, including the Companys Chief Executive Officer and Chief Financial
Officer, of the effectiveness of the design and operation of the Companys disclosure controls and procedures pursuant to Rules 13a-15 and 15d-15 of the Securities Exchange Act of 1934 (the Exchange Act). Based upon that evaluation,
the Chief Executive Officer and Chief Financial Officer concluded that the Companys disclosure controls and procedures are effective with respect to the recording, processing, summarizing and reporting, within the time periods specified in the
Commissions rules and forms, of information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act.

There were no significant changes in the Companys internal control over financial reporting that occurred during the first quarter of 2010 that
have materially affected, or are reasonably likely to materially affect, the Companys internal control over financial reporting.

PART IIOTHER INFORMATION



|Item 1. | LEGAL PROCEEDINGS
|------- | -----------------

Not applicable.



|Item 1A. | RISK FACTORS
|-------- | ------------

The Company is a smaller reporting
company and no response is required pursuant to this Item.



|Item 2. | UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
|------- | -----------------------------------------------------------

There were no sales of equity securities by the Company during the period covered by this report.

During the three months ended March 31, 2010, the Company purchased the following shares of common stock as treasury shares.



|              |  |                  |  |                             |       |                                                                                    |        
|------------- |  | ---------------- |  | --------------------------- | ----- | ---------------------------------------------------------------------------------- | -------
|2010 Month    |  | Number of Shares |  | Average PricePaid per share |       | MaximumNumber of Sharesthat May Yet BePurchased UnderThe Program atMonth - End
(1)
|January       |  | 2,000            |  | $                           | 35.00 |                                                                                    | 183,641
|February      |  | 2,000            |  | $                           | 26.89 |                                                                                    | 181,641
|March         |  | 1,700            |  | $                           | 26.40 |                                                                                    | 179,941
|              |  |                  |  |                             |       |                                                                                    |        
|Total/Average |  | 5,700            |  | $                           | 29.59 |                                                                                    |        
|              |  |                  |  |                             |       |                                                                                    |        



|(1) | In December 1993, we announced that our board of directors authorized a stock repurchase program whereby we may purchase outstanding shares of our common stock from
time-to-time, in open market transactions or negotiated sales. A total of 2,700,000 shares have been authorized, to date, under this program. Through March 31, 2010 we repurchased a total of 2,520,059 shares under this program for $34,242,937
at an average price of $13.59 per share. Additional purchases may occur as market conditions warrant. We expect future purchases will be funded with internally generated cash flow or from working capital.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|Item 3. | DEFAULTS UPON SENIOR SECURITIES
|------- | -------------------------------

None



|Item 4. | RESERVED
|------- | --------



|Item 5. | OTHER INFORMATION
|------- | -----------------

None



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##### Table of Contents

|Item 6. | EXHIBITS
|------- | --------

The following
exhibits are filed as a part of this Report:



|            |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|----------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit No. |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|3.1         |  | Restated Certificate of Incorporation of PrimeEnergy Corporation (effective July 1, 2009) (Incorporated by reference to Exhibit 3.1 to PrimeEnergy Corporation Form 10-Q for the
quarter ended June 30, 2009)                                                                                                                                                                                                                                                                                                                                                                                                          
|            | 
|3.2         |  | Bylaws of PrimeEnergy Corporation (Incorporated by reference to Exhibit 3.2 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2004)                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|            | 
|10.3.1      |  | Adoption Agreement #003 dated 4/23/2002, MassMutual Life Insurance Company Flexinvest Prototype Non-Standardized 401(k) Profit-Sharing Plan; EGTRRA Amendment to the PrimeEnergy
employees 401(k) Savings Plan; MassMutual Retirement Services Flexinvest Defined Contribution Prototype Plan; Protected Benefit Addendum; Addendum to the Administrative Services Agreement Loan Agreement; Addendum to Administrative Services Agreement
GUST Restatement Provisions; General Trust Agreement (Incorporated by reference to Exhibit 10.3.1 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2002)
|            | 
|10.3.2      |  | First Amendment to the PrimeEnergy Corporation Employees 401(k) Savings Plan (Incorporated by reference to Exhibit 10.3.2 of PrimeEnergy Corporation Form 10-K for the year ended
December 31, 2006)                                                                                                                                                                                                                                                                                                                                                                                                                   
|            | 
|10.4        |  | Amended and Restated Agreement of Limited Partnership, FWOE Partners L.P., dated as of August 22, 2005 (Incorporated by reference to Exhibit 10.3 of PrimeEnergy Corporation Form 8-K
for events of August 22, 2005)                                                                                                                                                                                                                                                                                                                                                                                                   
|            | 
|10.4.1      |  | Contribution Agreement between F-W Oil Exploration L.L.C. and FWOE Partners L.P. dated as of August 22, 2005 (Incorporated by reference to exhibit 10.4 of PrimeEnergy Corporation
Form 8-K for events of August 22, 2005)                                                                                                                                                                                                                                                                                                                                                                                             
|            | 
|10.18       |  | Composite copy of Non-Statutory Option Agreements (Incorporated by reference to Exhibit 10.18 of PrimeEnergy Corporation Form 10-K for the year ended December 31,
2004)                                                                                                                                                                                                                                                                                                                                                                                                                                               
|            | 
|10.22.5     |  | Amended and Restated Credit Agreement among PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service Company, Southwest
Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB as Agent and Letter of Credit Issuer and BNP Paribas, as Co-Documentation Agent and JPMorgan Chase Bank, N.A., as Co-Documentation Agent and the Lenders Signatory hereto,
December 28, 2006 (Incorporated by reference to Exhibit 10.22.5 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                         
|            | 
|10.22.5.1   |  | Letter from BNP Paribas regarding Amended and Restated Credit Agreement effective as of December 28, 2006, among PrimeEnergy Corporation, et al, and Guaranty Bank, FSB (Incorporated
by reference to Exhibit 10.22.5.1 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                                                                                                                                                                     
|            | 
|10.22.5.2   |  | First Amendment to Amended and Restated Credit Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB as Agent and Letter of Credit Issuer BNP Paribas, as Co-Documentation Agent and JPMorgan Chase Bank, N.A. as Co-Documentation Agent and the Lenders
Signatory Hereto, dated July 17, 2007. (Incorporated by reference to Exhibit 10.22.5.2 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2008)                    



19



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##### Table of Contents

|          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|--------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|          | 
|10.22.5.3 |  | Second Amendment to Amended and Restated Credit Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB as Agent and Letter of Credit Issuer BNP Paribas, as Co-Documentation Agent and JPMorgan Chase Bank, N.A. as Co-Documentation Agent and the Lenders
Signatory Hereto, dated October 9, 2007. (Incorporated by reference to Exhibit 10.22.5.3 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2008)
|          | 
|10.22.5.4 |  | Third Amendment to Amended and Restated Credit Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB as Agent and Letter of Credit Issuer and the Lenders Signatory Hereto, effective January 22, 2008. (Incorporated by reference to Exhibit 10.22.5.4 of
PrimeEnergy Corporation Form 10-K for the year ended December 31, 2008)                                                                                           
|          | 
|10.22.5.5 |  | Fourth Amendment to Amended and Restated Credit Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB as Agent and Letter of Credit Issuer and the Lenders Signatory Hereto, effective February 8, 2008. (Incorporated by reference to Exhibit 10.22.5.5 of
PrimeEnergy Corporation Form 10-K for the year ended December 31, 2008)                                                                                          
|          | 
|10.22.5.6 |  | Fifth Amendment to Amended and Restated Credit Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB as Agent and Letter of Credit Issuer and the Lenders Signatory Hereto, effective October 30, 2008. (Incorporated by reference to Exhibit 10.22.5.6 of
PrimeEnergy Corporation Form 10-K for the year ended December 31, 2008)                                                                                           
|          | 
|10.22.5.7 |  | Sixth Amendment to Amended and Restated Credit Agreement Among PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Guaranty Bank, FSB, as Agent and Letter of Credit Issuer and the Lenders Signatory Hereto, effective June 19, 2009. (Incorporated by reference to Exhibit 10.22.5.7 to
PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2009)                                                                                                
|          | 
|10.22.5.8 |  | Seventh Amendment to Amended and Restated Credit Agreement Among PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service
Company, Southwest Oilfield Construction Company, EOWS Midland Company and Compass Bank (successor in interest to Guaranty Bank, FSB), as Agent and Letter of Credit Issuer and the Lenders Signatory Hereto, effective March 1, 2010. (Incorporated by
reference to Exhibit 10.22.5.8 to PrimeEnergy Corporation Form 10-K for the year ended December 31, 2009)                                                     
|          | 
|10.23.2   |  | Amended and Restated Security Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service Company, Southwest
Oilfield Construction Company, EOWS Midland Company, (debtor) and Guaranty Bank, FSB as Agent (secured party) December 28, 2006 (Incorporated by reference to Exhibit 10.23.2 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                            
|          | 
|10.23.3   |  | Amended and Restated Security Agreement (Membership Pledge) by PrimeEnergy Corporation in favor of Guaranty Bank, FSB as Agent December 28, 2006 (Incorporated by reference to
Exhibit 10.23.3 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                                                                                                                                                                             
|          | 
|10.23.4   |  | Amended and Restated Security Agreement between PrimeEnergy Corporation, PrimeEnergy Management Corporation, Prime Operating Company, Eastern Oil Well Service Company, Southwest
Oilfield Construction Company, EOWS Midland Company, (debtor) and Guaranty Bank, FSB as Agent (secured party) December 28, 2006 (Incorporated by reference to Exhibit 10.23.4 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                            
|          | 
|10.23.5   |  | Amended and Restated Security Agreement between Eastern Oil Well Service Company, EOWS Midland Company, (debtor) and Guaranty Bank, FSB as Agent (secured party) December 28, 2006
(Incorporated by reference to Exhibit 10.23.5 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                                                                                                                                           
|          | 
|10.23.6   |  | Security Agreement between Eastern Oil Well Service Company, EOWS Midland Company, (debtor) and Guaranty Bank, FSB as Agent (secured party) December 28, 2006 (Incorporated by
reference to Exhibit 10.23.6 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                                                                                                                                                                
|          | 
|10.23.7   |  | Amended and Restated Security Agreement between Southwest Oilfield Construction Company, (debtor) and Guaranty Bank, FSB as Agent (secured party) December 28, 2006 (Incorporated by
reference to Exhibit 10.23.7 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                                                                                                                                                          



20



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##### Table of Contents

|          |  |                                                                                                                                                                                                                                                                                                                                                                                                                                         
|--------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|          | 
|10.23.8   |  | Amended and Restated Security Agreement effective between EOWS Midland Company, (debtor) and Guaranty Bank, FSB as Agent (secured party) December 28, 2006 (Incorporated by
reference to Exhibit 10.23.8 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                     
|          | 
|10.23.9   |  | Ratification of and Amendment to Mortgage, Deed of Trust, Security Agreement, Financing Statement and Assignment of Production, dated effective February 24, 2010, by and
between PrimeEnergy Corporation and PrimeEnergy Management Corporation and Compass Bank (successor in interest to Guaranty Bank, FSB) (Incorporated by reference to Exhibit 10.23.9 to PrimeEnergy Corporation Form 10-K for the year ended
December 31, 2009)
|          | 
|10.25     |  | Credit Agreement dated as of June 1, 2006 (but effective for all purposes as of August 22, 2005), between Prime Offshore L.L.C. as Borrower and PrimeEnergy Corporation as Lender
(Incorporated by reference to Exhibit 10.25 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                
|          | 
|10.26.1   |  | Subordination Agreement effective as of June 29, 2006, between Prime Offshore L.L.C., PrimeEnergy Corporation, and Guaranty Bank, FSB (Incorporated by reference to Exhibit 10.26.1
of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                          
|          | 
|10.26.2   |  | Amended and Restated Credit Agreement among Prime Offshore L.L.C. between Guaranty Bank, FSB, as agent and the Lenders party hereto effective March 31, 2008. (Incorporated by
reference to Exhibit 10.26.2 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2008)                                                                                                                                                   
|          | 
|10.26.3   |  | Consent, Waiver and First Amendment to Amended and Restated Credit Agreement Among Prime Offshore L.L.C., Guaranty Bank, FSB, as Agent and the Lenders Party Hereto, effective
June 30, 2009. (Incorporated by reference to Exhibit 10.26.3 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2009)                                                                                                                   
|          | 
|10.27     |  | Security Agreement effective June 29, 2006 between Prime Offshore L.L.C., and Guaranty Bank, FSB (debtor) and Guaranty Bank, FSB as Agent (secured party) (Incorporated by reference
to Exhibit 10.27 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                        
|          | 
|10.27.1   |  | Mortgage, Deed of Trust, Security Agreement, Financing Statement and Assignment of Production from Prime Offshore L.L.C. for the benefit of Guaranty Bank, FSB, Agent, effective
June 30, 2009. (Incorporated by reference to Exhibit 10.27.1 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2009)                                                                                                                 
|          | 
|10.27.2   |  | Pledge Agreement as of June 29, 2006, between Guaranty Bank, FSB and Prime Offshore L.L.C. (Incorporated by reference to Exhibit 10.27.2 of PrimeEnergy Corporation Form 10-K for the
year ended December 31, 2006)                                                                                                                                                                                                                     
|          | 
|10.27.3   |  | Subordinated Promissory Note dated effective March 31, 2008 in the face principal amount of up to $50,000,000 executed by Prime Offshore L.L.C. and payable to Artic Management
Corporation. (Incorporated by reference to Exhibit 10.27.3 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2008)                                                                                                                    
|          | 
|10.27.3.1 |  | Loan Modification effective
30thday of June, 2009 by and between Artic Management
Corporation, Prime Offshore L.L.C. and PrimeEnergy Corporation. (Incorporated by reference to Exhibit 10.27.3.1 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2009)                                                                                                                                                             
|          | 
|10.27.4   |  | Mortgage, Deed of Trust, Security Agreement, Financing Statement and Assignment of Production Dated effective as of March 31, 2008 from Prime Offshore L.L.C. to Mathias Eckenstein
TTEE for Artic Management Corporation (first lien). (Incorporated by reference to Exhibit 10.27.4 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2008)                                                                         
|          | 
|10.27.5   |  | Mortgage, Deed of Trust, Security Agreement, Financing Statement and Assignment of Production Dated effective as of March 31, 2008 from Prime Offshore L.L.C. to Mathias Eckenstein
TTEE for Artic Management Corporation (second lien). (Incorporated by reference to Exhibit 10.27.5 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2008)                                                                        
|          | 
|10.27.6   |  | Pledge Agreement dated as effective March 31, 2008 between Prime Offshore L.L.C. and Artic Management Corporation (General Partner Interest in FWOE Partners L.P.) (Incorporated by
reference to Exhibit 10.27.6 to PrimeEnergy Corporation Form 10-Q for the quarter ended June 30, 2008)                                                                                                                                              
|          | 
|10.27.7   |  | Pledge Agreement made effective June 30, 2009, by and between Prime Offshore L.L.C. and Guaranty Bank, FSB, as Agent. (Incorporated by reference to Exhibit 10.27.7 to PrimeEnergy
Corporation Form 10-Q for the quarter ended June 30, 2009)                                                                                                                                                                                           
|          | 
|10.27.8   |  | Subordination of Liens and Security Interests effective June 30, 2009, by Artic Management Corporation for the benefit of Guaranty Bank, FSB, as Agent. (Incorporated by reference
to Exhibit 10.27.8 to PrimeEnergy CorporationForm 10-Q for the quarter ended June 30, 2009)                                                                                                                                                          
|          | 
|10.28     |  | Completion and Liquidity Maintenance Agreement effective as of June 29, 2006, between PrimeEnergy Corporation, Guaranty Bank, FSB, and Prime Offshore, L.L.C. (Incorporated by
reference to Exhibit 10.28 of PrimeEnergy Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                    
|          | 
|10.29     |  | Put Right Agreement effective as of June 29, 2006, by and among PrimeEnergy Corporation and Prime Offshore L.L.C. (Incorporated by reference to Exhibit 10.29 of PrimeEnergy
Corporation Form 10-K for the year ended December 31, 2006)                                                                                                                                                                                                
|          | 
|31.1      |  | Certification of Chief Executive Officer pursuant to Rule 13(a)-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as amended (filed herewith).                                                                                                                                                                                                                                                                                    
|          | 
|31.2      |  | Certification of Chief Financial Officer pursuant to Rule 13(a)-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as amended (filed herewith).                                                                                                                                                                                                                                                                                    
|          | 
|32.1      |  | Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (filed herewith).                                                                                                                                                                                                                                                                        
|          | 
|32.2      |  | Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (filed
herewith).                                                                                                                                                                                                                                                                        



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##### Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



|             |  |                                         
|------------ |  | ----------------------------------------
|             |  | PrimeEnergy Corporation                 
|             |  | (Registrant)                            
|             | 
|May 17, 2010 |  | /s/ Charles E. Drimal, Jr.              
|(Date)       |  | Charles E. Drimal, Jr.                  
|             |  | President                               
|             |  | Principal Executive Officer             
|             | 
|May 17, 2010 |  | /s/ Beverly A. Cummings                 
|(Date)       |  | Beverly A. Cummings                     
|             |  | Executive Vice President                
|             |  | Principal Financial Officer             
|             | 
|May 17, 2010 |  | /s/ Lynne Pizor                         
|(Date)       |  | Lynne Pizor                             
|             |  | Controller, Principal Accounting Officer



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