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| Delaware                                                       | 73-1283193 |
| (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.) |
|                                                           |   |
| 8200 South Unit DriveTulsa, Oklahoma                           | 74132 |
| (Address of principal executive offices)                       | (Zip Code) |

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| Title of each class                                                 | Name of each exchange on which registered |
| Common Stock, par value $.20 per share                              | NYSE |
| Rights to Purchase Series A ParticipatingCumulative Preferred Stock | NYSE |

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|                                                    |  |  |  |  |  |  |
| Large accelerated filer    [ ] |   | Accelerated filer    [x] |   | Non-accelerated filer    [ ] |   | Smaller reporting company    [ ] |

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|                                         |  |
| Class                                   | Outstanding at February 10, 2017 |
| Common Stock, $0.20 par value per share | 51,650,140 shares |

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|                                                                                                                                                                                                                                                                                                   |  |
| Document                                                                                                                                                                                                                                                                                          | Parts Into Which Incorporated |
| Portions of the registrant’s definitive proxy statement (the Proxy Statement) with respect to its annual meeting of shareholders scheduled to be held on May 3, 2017. The Proxy Statement will be filed within 120 days after the end of the fiscal year to which this report relates. | Part III |

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| 3.1     |   | Restated Certificate of Incorporation of Unit Corporation (filed as Exhibit 3.1 to Unit's Form 8-K, dated June 29, 2000, which is incorporated herein by reference). |
|    |   |   |
| 3.1.2   |   | Certificate of Amendment of Amended and Restated Certificate of Incorporation of the Company (filed as Exhibit 3.1 to Unit’s Form 8-K, dated May 9, 2006 which is incorporated herein by reference). |
|    |   |   |
| 3.2     |   | By-laws of Unit Corporation, as amended and restated on June 17, 2014 (filed as Exhibit 3.3 to our Registration Statement on Form S-3 (File No. 333-202956), and incorporated by reference herein). |
|    |   |   |
| 4.1     |   | Form of Common Stock Certificate (filed as Exhibit 4.1 to Unit’s Form S-3 (File No. 333-83551), which is incorporated herein by reference). |
|    |   |   |
| 4.5     |   | Indenture dated as of May 18, 2011, by and between the Company and Wilmington Trust FSB, as trustee (filed as Exhibit 4.1 to Unit’s Form 8-K dated May 18, 2011, which is incorporated herein by reference). |
|    |   |   |
| 4.6     |   | First Supplemental Indenture (including form of note) dated as of May 18, 2011, by and among the Company, as issuer, the Subsidiary Guarantors (as defined therein), as guarantors and Wilmington Trust FSB as trustee (filed as Exhibit 4.1 to Unit’s Form 8-K dated May 18, 2011, which is incorporated herein by reference). |
|    |   |   |
| 4.7     |   | Second Supplemental Indenture (including form of note) dated as of January 7, 2013, by and among the Registrant, as issuer, the Subsidiary Guarantors (as defined therein), as guarantors and Wilmington Trust, National Association as trustee (filed as Exhibit 4.10 to Unit’s Post-Effective Amendment No.1 to the Registration Statement on Form S-3 dated February 16, 2016, which is incorporated herein by reference). |
|    |   |   |
| 10.1.2* |   | Form of Unit Corporation Restricted Stock Bonus Agreement (filed as Exhibit 10.1 to Unit’s Form 8-K dated December 13, 2005, which is incorporated herein by reference). |
|    |   |   |
| 10.1.3* |   | Unit Corporation Stock and Incentive Compensation Plan Amended and Restated May 2, 2012 (filed as Exhibit 10 to Unit’s Form 8-K dated May 2, 2012, which is incorporated herein by reference). |
|    |   |   |
| 10.1.4  |   | Amended and Restated Key Employee Change of Control Contract dated August 19, 2008 (filed as Exhibit 10.1 to Unit’s Form 8-K dated August 25, 2008, which is incorporated herein by reference). |
|    |   |   |
| 10.1.5  |   | Senior Credit Agreement dated September 13, 2011 by and among the Company and the subsidiaries named therein (as borrowers), BOKF, NA DBA Bank of Oklahoma, as Administrative Agent, and the institutions named therein (as lenders) (filed as Exhibit 10.1 to Unit’s Form 8-K dated September 13, 2011, which is incorporated herein by reference). |
|    |   |   |
| 10.1.6  |   | Gas Purchase Agreement dated November 21, 2011 by and between Superior Pipeline Company, L.L.C. and Sullivan and Company, L.L.C. (filed as Exhibit 10.1 to Unit’s Form 8-K dated November 21, 2011, which is incorporated herein by reference). |
|    |   |   |
| 10.1.7  |   | First Amendment and Consent, dated September 5, 2012, to the Senior Credit Agreement by and among the Company and the subsidiaries named therein (as borrowers), BOKF, NA DBA Bank of Oklahoma, as Administrative Agent, and the institutions named therein (as lenders) (filed as exhibit 10.1 to Unit's Form 8-K dated September 5, 2012, which is incorporated herein by reference). |
|    |   |   |
| 10.1.8* |   | Second Amended and Restated Unit Corporation Stock and Incentive Compensation Plan dated May 6, 2015 (filed as Exhibit 10 to Unit's Form 8-K dated May 8, 2015, which is incorporated herein by reference). |
|    |   |   |
| 10.2.1  |   | Unit 1979 Oil and Gas Program Agreement of Limited Partnership (filed as Exhibit I to Unit Drilling and Exploration Company’s Registration Statement on Form S-1 as S.E.C. File No. 2-66347, which is incorporated herein by reference). |
|    |   |   |

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| 10.2.3*  |   | Unit’s Amended and Restated Stock Option Plan (filed as an Exhibit to Unit’s Registration Statement on Form S-8 as S.E.C. File No’s. 33-19652, 33-44103, 33-64323 and 333-39584 which is incorporated herein by reference). |
|     |   |   |
| 10.2.4*  |   | Unit Corporation Non-Employee Directors’ Stock Option Plan (filed as an Exhibit to Form S-8 as S.E.C. File No. 33-49724 and File No. 333-166605, which are incorporated herein by reference). |
|     |   |   |
| 10.2.5*  |   | Unit Corporation Employees’ Thrift Plan (filed as an Exhibit to Form S-8 as S.E.C. File No. 33-53542, which is incorporated herein by reference). |
|     |   |   |
| 10.2.6   |   | Unit Consolidated Employee Oil and Gas Limited Partnership Agreement (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 1993, which is incorporated herein by reference). |
|     |   |   |
| 10.2.7*  |   | Unit Corporation Salary Deferral Plan (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 1993, which is incorporated herein by reference). |
|     |   |   |
| 10.2.8*  |   | Unit Corporation Separation Benefit Plan for Senior Management as amended (filed as an Exhibit 10.1 to Unit’s Form 8-K dated December 20, 2004). |
|     |   |   |
| 10.2.9*  |   | Unit Corporation Special Separation Benefit Plan as amended (filed as Exhibit 10.3 to Unit’s Form 8-K dated December 20, 2004). |
|     |   |   |
| 10.2.10  |   | Unit 2000 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under the cover of Form 10-K for the year ended December 31, 1999). |
|     |   |   |
| 10.2.11* |   | Unit Corporation 2000 Non-Employee Directors’ Stock Option Plan (filed as an Exhibit to Form S-8 as S.E.C. File No. 333-38166, which is incorporated herein by reference). |
|     |   |   |
| 10.2.12  |   | Unit 2001 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under the cover of Form 10-K for the year ended December 31, 2000). |
|     |   |   |
| 10.2.13  |   | Unit 2002 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2001). |
|     |   |   |
| 10.2.14  |   | Unit 2003 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2002). |
|     |   |   |
| 10.2.15  |   | Unit 2004 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2003). |
|     |   |   |
| 10.2.16  |   | Unit 2005 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2004). |
|     |   |   |
| 10.2.17* |   | Form of Indemnification Agreement entered into between the Company and its executive officers and directors (filed as Exhibit 10.1 to Unit’s Form 8-K dated February 22, 2005, which is incorporated herein by reference). |
|     |   |   |
| 10.2.18* |   | Form of Indemnification Agreement entered into between the Company and its executive officers and directors (filed herein as Exhibit 10.1). |
|     |   |   |
| 10.2.19  |   | Unit 2006 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2005). |
|     |   |   |
| 10.2.20  |   | Unit 2007 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2006). |
|     |   |   |
| 10.2.21* |   | Separation Benefit Plan as amended August 21, 2007 (filed as an Exhibit to Unit’s Form 10-Q for the quarter ended September 30, 2007). |
|     |   |   |
| 10.2.22  |   | Unit 2008 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2007). |
|     |   |   |
| 10.2.23* |   | Annual Bonus Performance Plan entered into October 21, 2008 (filed as Exhibit 10.1 to Unit’s Form 8-K dated October 23, 2008, which is incorporated herein by reference). |
|     |   |   |
| 10.2.24* |   | Separation Benefit Plan as amended October 21, 2008 (filed as Exhibit 10.2 to Unit’s Form 8-K dated October 23, 2008, which is incorporated herein by reference). |
|     |   |   |
| 10.2.25* |   | Separation Benefit Plan as amended December 31, 2008 (filed as Exhibit 10.1 to Unit’s Form 8-K dated January 6, 2009, which is incorporated herein by reference). |
|     |   |   |

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| 10.2.26* |   | Special Separation Benefit Plan as amended December 31, 2008 (filed as Exhibit 10.2 to Unit’s Form 8-K dated January 6, 2009, which is incorporated herein by reference). |
|     |   |   |
| 10.2.27* |   | Separation Benefit Plan for Senior Management as amended December 31, 2008 (filed as Exhibit 10.3 to Unit’s Form 8-K dated January 6, 2009, which is incorporated herein by reference). |
|     |   |   |
| 10.2.28  |   | Unit 2009 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2008). |
|     |   |   |
| 10.2.29* |   | Unit Corporation 2000 Non-Employee Directors’ Stock Option Plan as Amended and Restated August 25, 2004 (as amended on May 29, 2009 and filed as Exhibit 10.1 to Unit’s Form 8-K dated May 29, 2009, which is incorporated herein by reference). |
|     |   |   |
| 10.2.30  |   | Unit 2010 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2009). |
|     |   |   |
| 10.2.31  |   | Unit 2011 Employee Oil and Gas Limited Partnership Agreement of Limited Partnership (filed as an Exhibit to Unit’s Annual Report under cover of Form 10-K for the year ended December 31, 2010). |
|     |   |   |
| 10.2.32  |   | Second Amendment and Consent, dated April 10, 2015, to the Senior Credit Agreement by and among the Company and the subsidiaries named therein (as borrowers), BOKF, NA DBA Bank of Oklahoma, as Administrative Agent, and the institutions named therein (as lenders) (filed as exhibit 10.1 to Unit's Form 8-K dated April 13, 2015, which is incorporated herein by reference). |
|     |   |   |
| 10.2.33* |   | Separation Benefit Plan as amended December 8, 2015 (filed as Exhibit 10.1 to Unit’s Form 8-K dated December 14, 2015, which is incorporated herein by reference). |
|     |   |   |
| 10.2.34* |   | Special Separation Benefit Plan as amended December 8, 2015 (filed as Exhibit 10.2 to Unit’s Form 8-K dated December 14, 2015, which is incorporated herein by reference). |
|     |   |   |
| 10.2.35  |   | Third Amendment and Consent, dated April 8, 2016, to the Senior Credit Agreement by and among the Company and the subsidiaries named therein (as borrowers), BOKF, NA DBA Bank of Oklahoma, as Administrative Agent, and the institutions named therein (as lenders) (filed as exhibit 10.2 to Unit's Form 8-K/A dated April 13, 2016, which is incorporated herein by reference). |
|     |   |   |
| 12       |   | Computation Ratio of Earnings to Fixed Charges (filed as an Exhibit to Unit's Annual Report under cover of Form 10-K for the year ended December 31, 2016). |
|     |   |   |
| 21       |   | Subsidiaries of the Registrant (filed as an Exhibit to Unit's Annual Report under cover of Form 10-K for the year ended December 31, 2016). |
|     |   |   |
| 23.1     |   | Consent of Independent Registered Public Accounting Firm, PricewaterhouseCoopers LLP (filed as an Exhibit to Unit's Annual Report under cover of Form 10-K for the year ended December 31, 2016). |
|     |   |   |
| 23.2     |   | Consent of Ryder Scott Company, L.P. (filed as an Exhibit to Unit's Annual Report under cover of Form 10-K for the year ended December 31, 2016). |
|     |   |   |
| 31.1     |   | Certification of Chief Executive Officer under Rule 13a - 14(a) of the Exchange Act (filed herein). |
|     |   |   |
| 31.2     |   | Certification of Chief Financial Officer under Rule 13a - 14(a) of the Exchange Act (filed herein). |
|     |   |   |
| 32       |   | Certification of Chief Executive Officer and Chief Financial Officer under Rule 13a-14(a) of the Exchange Act and 18 U.S.C. Section 1350, as adopted under Section 906 of the Sarbanes-Oxley Act of 2002 (filed as an Exhibit to Unit's Annual Report under cover of Form 10-K for the year ended December 31, 2016). |
|     |   |   |
| 99.1     |   | Ryder Scott Company, L.P. Summary Report (filed as an Exhibit to Unit's Annual Report under cover of Form 10-K for the year ended December 31, 2016). |
|     |   |   |
| 101.INS  |   | XBRL Instance Document. |
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| 101.SCH  |   | XBRL Taxonomy Extension Schema Document. |
|     |   |   |
| 101.CAL  |   | XBRL Taxonomy Extension Calculation Linkbase Document. |
|     |   |   |
| 101.DEF  |   | XBRL Taxonomy Extension Definition Linkbase Document. |
|     |   |   |
| 101.LAB  |   | XBRL Taxonomy Extension Labels Linkbase Document. |
|     |   |   |
| 101.PRE  |   | XBRL Taxonomy Extension Presentation Linkbase Document. |

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|   |   |   | UNIT CORPORATION |
|   |   |   |   |
| DATE:  | March 30, 2017 | By: | /s/    LARRY D. PINKSTON         |
|   |   |   | LARRY D. PINKSTON |
|   |   |   | President and Chief Executive Officer(Principal Executive Officer) |

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| Exhibit No. |    | Description |
| 31.1             |    | Certification of Chief Executive Officer under Rule 13a—14(a) of the Exchange Act. |
|             |   |   |
| 31.2             |    | Certification of Chief Financial Officer under Rule 13a—14(a) of the Exchange Act. |
|             |   |   |