UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 8-K

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

        Date of report (Date of earliest event reported) January 19, 2006

                              WILLBROS GROUP, INC.
             (Exact Name of Registrant as Specified in Its Charter)

                               Republic of Panama
                 (State or Other Jurisdiction of Incorporation)


                                            
         1-11953                                           98-0160660
(Commission File Number)                       (IRS Employer Identification No.)


       Plaza 2000 Building, 50th Street, 8th Floor, P.O. Box 0816-01098,
                           Panama, Republic of Panama
(Address of Principal Executive Offices)                              (Zip Code)

                                 +50-7-213-0947
              (Registrant's Telephone Number, Including Area Code)

                                 Not Applicable
          (Former Name or Former Address, if Changed Since Last Report)

     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)

     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
          CFR 240.14a-12)

     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))

     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))



ITEM 2.03. CREATION OF A DIRECT FINANCIAL OBLIGATION OR AN OBLIGATION UNDER AN
OFF BALANCE SHEET ARRANGEMENT OF A REGISTRANT.

     The description of the sale by Willbros Group, Inc. (the "Company"), of
$7.5 million of 6.50% Senior Convertible Notes due 2012 (the "Notes"), set forth
under Item 3.02 of this Current Report on Form 8-K is incorporated by reference
herein. The description of the terms and conditions of the Notes, the purchase
agreement dated as of December 22, 2005 (the "Purchase Agreement"), and the
indenture dated December 23, 2005 governing the Notes (the "Indenture"), set
forth under Item 1.01 of the Company's Current Report on Form 8-K filed on
December 23, 2005, together with the complete text of the Purchase Agreement and
the Indenture, which are filed as exhibits to such report, are also incorporated
by reference herein.

ITEM 3.02. UNREGISTERED SALES OF EQUITY SECURITIES.

     The Purchase Agreement provides that at any time during a period of 90 days
following the initial December 23, 2005 closing of the sale of $65 million in
aggregate principal amount of Notes, the Note purchasers may purchase up to an
additional $19.5 million in aggregate principal amount of Notes. On January 19,
2006, two of the initial purchasers exercised their respective options to
purchase an additional $7.5 million in aggregate principal amount of Notes. As a
result, the aggregate principal amount of the Notes is currently $72.5 million.
The Notes are convertible into a number of shares of the Company's common stock
at a conversion rate of 56.9606 shares of common stock per $1,000 principal
amount of Notes, which is equivalent to an initial conversion price of
approximately $17.56 per share, subject to adjustment in certain circumstances.
After payment of cash selling commission fees in the amount of $255,000, the
Company will receive net proceeds of approximately $7,245,000 million.

     The securities sold here (and initially) were offered pursuant to
exemptions from registration under Section 4(2) of the Securities Act of 1933,
as amended, and Rule 506 of Regulation D. There were a total of two purchasers
from among the eight initial purchasers, both of whom are accredited.


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                                   SIGNATURES

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

                                      WILLBROS GROUP, INC.


Date: January 19, 2006                By: /s/ Warren L. Williams
                                          --------------------------------------
                                          Warren L. Williams
                                          Senior Vice President, Chief Financial
                                          Officer and Treasurer


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