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


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934

                               (Amendment No. 9)*


                                   Unit Corp.
                                (Name of Issuer)

                          COMMON STOCK, $.20 PAR VALUE
                         (Title of Class of Securities)

                                    909218109
                                 (CUSIP Number)


                                December 31, 2005
             (Date of Event Which Requires Filing of This Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                      [x]  Rule 13d-1(b)
                                      [ ]  Rule 13d-1(c)
                                      [ ]  Rule 13d-1(d)

    *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

    The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).



CUSIP NO. 909218109                   13G                      Page 2 of 7 pages

1  NAME OF REPORTING PERSON
   S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

   Forstmann-Leff Associates, LLC
   52-2169043

2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                                (a) [ ]

                                                (b) [ ]
3  SEC USE ONLY

4  CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware

                    5  SOLE VOTING POWER
   NUMBER OF
     SHARES            142,663 shares
  BENEFICIALLY
    OWNED BY        6  SHARED VOTING POWER
      EACH
    REPORTING          55,375 shares
     PERSON
      WITH          7  SOLE DISPOSITIVE POWER

                       147,083 shares

                    8  SHARED DISPOSITIVE POWER

                       62,219 shares

9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      209,302 shares (includes shares beneficially owned by FLA Asset
      Management, LLC)

10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

                                                 [ ]

11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     .5%

12  TYPE OF REPORTING PERSON

     IA, OO



CUSIP NO. 909218109                   13G                      Page 3 of 7 pages

1  NAME OF REPORTING PERSON
   S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

   FLA Asset Management, LLC
   52-2169045

2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                (a) [ ]

                                                (b) [ ]

3  SEC USE ONLY

4  CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware

                    5  SOLE VOTING POWER
   NUMBER OF
     SHARES            None
  BENEFICIALLY
    OWNED BY        6  SHARED VOTING POWER
      EACH
    REPORTING          55,375 shares
     PERSON
      WITH          7  SOLE DISPOSITIVE POWER

                       None

                    8  SHARED DISPOSITIVE POWER

                       62,219 shares

9   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     62,219 shares

10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

                                                    [ ]

11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     .1%

12  TYPE OF REPORTING PERSON

     IA, OO



                                                               Page 4 of 7 pages

Item 1(a) NAME OF ISSUER:

     Unit Corp.

Item 1(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

     7130 South Lewis Avenue, Suite 1000
     Tulsa, Oklahoma 74136

Item 2(a) NAME OF PERSON FILING:

     See Item 1 of the cover pages attached hereto

Item 2(b) Address of Principal Business Office, or if none, residence:

     590 Madison Avenue
     New York, New York  10022

Item 2(c) CITIZENSHIP:

     See Item 4 of the cover pages attached hereto

Item 2(d) TITLE OF CLASS OF SECURITIES:

     Common Stock, $.20 par value

Item 2(e) CUSIP NUMBER:

     909218109

Item 3    Forstmann-Leff Associates, LLC, a Delaware limited liability company,
          is a registered investment adviser under Section 203 of the Investment
          Advisers Act of 1940 (the "Act"). FLA Asset Management, LLC, a
          Delaware limited liability company, is a registered investment adviser
          under the Act and a subsidiary of Forstmann-Leff Associates, LLC.




                                                               Page 5 of 7 pages

Item 4    OWNERSHIP:

     (a)  Amount beneficially owned:
          See Item 9 of the cover pages attached hereto

     (b)  Percent of Class:
          See Item 11 of the cover pages attached hereto

     (c)  See Items 5 through 8 of the cover pages attached hereto

Item 5    OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

          Not applicable

Item 6    OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

          This statement is being filed to report that as of December
          31, 2005, the reporting persons ceased to be a beneficial
          owner of more than 5% of the Common Stock of Unit Corp.

Item 7    IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
          SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:

          Not Applicable

Item 8    IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

          Not Applicable

Item 9    NOTICE OF DISSOLUTION OF GROUP:

          Not Applicable

Item 10   CERTIFICATION:

          By signing below I certify that, to the best of my knowledge and
          belief, the securities referred to above were acquired and are held in
          the ordinary course of business and were not acquired and are not held
          for the purpose of or with the effect of changing or influencing the
          control of the issuer of the securities and were not acquired and are
          not held in connection with or as a participant in any transaction
          having that purpose or effect.




                                                               Page 6 of 7 pages

                                   SIGNATURES
                                   ----------

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

February 9, 2006


                                            FORSTMANN-LEFF ASSOCIATES, LLC


                                            By:  /s/ Kristin Mariani
                                            Chief Compliance Officer


                                            FLA ASSET MANAGEMENT, LLC


                                            By:  Forstmann-Leff Associates, LLC,
                                                 its Sole Member


                                            By:  /s/ Kristin Mariani
                                            Chief Compliance Officer









                                                               Page 7 of 7 pages

                                                                       Exhibit A

                                    AGREEMENT
                                    ---------

         The undersigned, Forstmann-Leff Associates, LLC and FLA Asset
Management, LLC agree that the statement to which this exhibit is appended is
filed on behalf of each of them.


February 9, 2006

                                           FORSTMANN-LEFF ASSOCIATES, LLC


                                           By:  /s/ Kristin Mariani
                                           Chief Compliance Officer


                                           FLA ASSET MANAGEMENT, LLC


                                           By:  Forstmann-Leff Associates, LLC,
                                                its Sole Member


                                           By:  /s/ Kristin Mariani
                                           Chief Compliance Officer