SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  -------------

                                    FORM 11-K

                                  -------------


 [X] Annual Report Pursuant to Section 15(d) of the Securities Exchange Act of

     1934 For the Fiscal Year Ended December 31, 2005

                                       or

 [ ] Transition Report Pursuant to Section 15(d) of the Securities Exchange Act

     of 1934 For the transition period from _______________ to ______________


Commission File Number: 001-10607
                        ---------

                                  -------------


                           GREAT WEST CASUALTY COMPANY
                               PROFIT SHARING PLAN

                                  -------------


                     OLD REPUBLIC INTERNATIONAL CORPORATION
                            307 NORTH MICHIGAN AVENUE
                             CHICAGO, ILLINOIS 60601

















                                 Total Pages: 14



                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the Plan
Committee has duly caused this annual report to be signed on behalf of the
undersigned, thereunto duly authorized.


                                   GREAT WEST CASUALTY COMPANY
                                   PROFIT SHARING PLAN, Registrant


                                   By, /s/ Hugh H. Fugleberg
                                      -----------------------------------------
                                      Hugh H. Fugleberg, Plan Committee Member


                                   By, /s/ Vickie Hirschert
                                      -----------------------------------------
                                      Vickie Hirchert, Plan Committee Member


                                   By, /s/ R. Scott Rager
                                      -----------------------------------------
                                      R. Scott Rager, Plan Committee Member


                                   By, /s/ Gaylen L. TenHulzen
                                      -----------------------------------------
                                      Gaylen L. TenHulzen, Plan Committee Member



Dated: May 19, 2006
















                           GREAT WEST CASUALTY COMPANY

                               PROFIT SHARING PLAN















                    REPORT ON AUDITS OF FINANCIAL STATEMENTS
                            AND SUPPLEMENTAL SCHEDULE
                 for the years ended December 31, 2005 and 2004














                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN

                          Index to Financial Statements


--------------------------------------------------------------------------------


                                                                        Page No.


Report of Independent Registered Public Accounting Firm                    1

Financial Statements:
   Statements of Net Assets Available for Benefits at
      December 31, 2005 and 2004                                           2

   Statements of Changes in Net Assets Available for Benefits
      for the years ended December 31, 2005 and 2004                       3

Notes to Financial Statements                                            4 - 9

Supplemental Schedule:
   Schedule of Assets (Held at End of Year) at December 31, 2005          10






Note: Supplemental schedules required by the Employee Retirement Income Security
Act of 1974 that have not been included herein are not applicable.







            Report of Independent Registered Public Accounting Firm



To the Participants and Administrator of
Great West Casualty Company Profit Sharing Plan:

In our opinion, the accompanying statements of net assets available for benefits
and the  related  statements  of changes in net assets  available  for  benefits
present fairly, in all material respects,  the net assets available for benefits
of Great West Casualty  Company Profit Sharing Plan (the "Plan") at December 31,
2005 and 2004,  and the changes in net assets  available  for  benefits  for the
years then ended in conformity with accounting  principles generally accepted in
the United States of America.  These financial statements are the responsibility
of the Plan's  management.  Our responsibility is to express an opinion on these
financial  statements  based on our  audits.  We  conducted  our audits of these
statements in accordance  with the  standards of the Public  Company  Accounting
Oversight  Board  (United  States).  Those  standards  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements,  assessing the accounting  principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

Our audits  were  conducted  for the  purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental Schedule of Assets (Held
at End of Year) is presented for the purpose of additional analysis and is not a
required part of the basic financial statements but is supplementary information
required by the  Department of Labor's Rules and  Regulations  for Reporting and
Disclosure  under the Employee  Retirement  Income  Security  Act of 1974.  This
supplemental  schedule  is the  responsibility  of the  Plan's  management.  The
supplemental  schedule has been subjected to the auditing  procedures applied in
the audits of the basic  financial  statements  and, in our  opinion,  is fairly
stated in all material  respects in relation to the basic  financial  statements
taken as a whole.



                                        /s/ PricewaterhouseCoopers, LLP

Chicago, IL
June 23, 2006



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                          DECEMBER 31, 2005 AND 2004                                           2
-------------------------------------------------------------------------------------------------


                                                                             December 31,
                                                                   ------------------------------
                                                                        2005            2004
                                                                   --------------  --------------
                                                                             
ASSETS:

Investments, at fair value:
    Old Republic International Corporation (ORI) common stock         $6,855,698      $5,660,947
    Pooled separate accounts                                          31,992,840      27,861,282
    Participant loans                                                  1,788,235       1,720,773
Investment, at contract value:
    PRIAC Guaranteed Long-Term Account                                18,621,369      18,016,808
                                                                   --------------  --------------

Net assets available for benefits                                    $59,258,142     $53,259,810
                                                                   ==============  ==============







The accompanying notes are an integral part of these financial statements.



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
           STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                 FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004                                3
-------------------------------------------------------------------------------------------------


                                                                      Years Ended December 31,
                                                                   -----------------------------
                                                                        2005           2004
                                                                   --------------  --------------
                                                                             
Contributions:
  Employer                                                            $3,595,933      $3,304,732
  Employee                                                             2,093,113       1,820,761
                                                                   --------------  --------------
    Total contributions                                                5,689,046       5,125,493
                                                                   --------------  --------------

Investment Income:
  Interest from PRIAC Guaranteed Long-Term Account                       588,885         556,309
  Dividends from ORI common stock                                        388,114         109,175
  Net appreciation (depreciation) of ORI common stock                    191,450         (20,533)
  Net investment gain from pooled separate accounts                    2,245,552       2,795,508
  Interest from participant loans                                        107,173          89,530
                                                                   --------------  --------------
    Total investment income                                            3,521,174       3,529,989
                                                                   --------------  --------------

Deductions:
  Benefits paid to participants                                       (3,204,527)     (1,875,437)
  Administrative expenses                                                 (7,361)        (10,373)
                                                                   --------------  --------------
    Total deductions                                                  (3,211,888)     (1,885,810)
                                                                   --------------  --------------

    Net increase                                                       5,998,332       6,769,672

Net assets available for benefits:
  Beginning of year                                                   53,259,810      46,490,138
                                                                   --------------  --------------
  End of year                                                        $59,258,142     $53,259,810
                                                                   ==============  ==============






The accompanying notes are an integral part of these financial statements.



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                          NOTES TO FINANCIAL STATEMENTS
                 FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004               4
--------------------------------------------------------------------------------

NOTE 1 - DESCRIPTION OF PLAN

The  following  brief  description  of the Great West  Casualty  Company  Profit
Sharing  Plan  (Plan)  is  provided  for  general  information   purposes  only.
Participants should refer to the Plan agreement for a more complete  description
of the Plan's provisions.

(a) General

The Plan is a defined  contribution  profit-sharing plan sponsored by Great West
Casualty Company (the Company),  covering all eligible  employees of the Company
as well as its affiliates. The Plan is subject to the provisions of the Employee
Retirement Income Security Act of 1974, as amended (ERISA).

(b) Contributions and Participant Accounts

Participants  may  contribute  1/2% to 15% of their annual wages to the Plan. In
2005 and 2004, the Company made matching  contributions to the Plan equal to 25%
of the first 6% of the employees' pre-tax contribution amount.  Participants may
elect  to have  their  contributions  invested  in any  one or more of  thirteen
separate  investment  funds.  The  Company  may also  contribute  an  additional
nonmatching  amount  out of its  current  or  accumulated  profits,  if any,  as
determined by the Company.

Each participant's  account is credited with the participant's  contribution and
an allocation of (a) the Company's contributions as described above and (b) Plan
earnings.  Allocations are based on participant account balances as defined. The
benefit to which a  participant  is entitled is the benefit that can be provided
from the participant's account.

(c) Eligibility and Vesting

Under the terms of the Plan, an employee shall become  eligible for inclusion in
the Plan 30 days following the first day he/she completes an hour of service and
upon  reaching  age  21.  An  employee   shall  become   eligible  for  employer
discretionary  contributions  upon reaching age 21 and after completion of 1,000
hours of service in any one Plan year,  beginning with date of hire. Minimum age
for vesting service is 18 years.

All employee and employer  matching  contributions  are immediately 100% vested.
Participants become fully vested in the value of the discretionary contributions
after 6 years of credited service.



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                    NOTES TO FINANCIAL STATEMENTS, Continued
                 FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004               5
--------------------------------------------------------------------------------

NOTE 1 - DESCRIPTION OF PLAN, Continued

(d) Payment of Benefits

On  termination  of  service,  retirement,  or death a  participant  or  his/her
beneficiary  may elect to leave funds in the Plan or receive either a single-sum
payment or purchase of a single  premium  life annuity  contract.  Net assets at
December 31, 2005 and 2004,  include funds totaling  $5,499,110 and  $4,923,285,
respectively,  which  represent  the account  balance of retired and  terminated
participants  who have elected to leave the funds in the Plan upon retirement or
termination.

(e) Forfeitures

All  forfeitures  are  segregated  until the employee  has attained  break(s) in
service totaling five years. At that time, forfeitures are allocated pro-rata to
each participant  account according to their respective  earnings for that year.
There were unallocated assets of $521 and $601,651, respectively at December 31,
2005 and 2004, related to these forfeitures.

(f) Loans

Participants may elect to borrow from the Plan based upon specified  conditions.
A participant  may have two outstanding  loans at any time.  Minimum single loan
amount is $1,000.  In no case shall the aggregate amount loaned to a participant
exceed the lesser of the  following:  (a)  $50,000  reduced by the excess of the
highest  outstanding  balance of loans from the Plan  during the one year period
ending on the date before the date of the loan to the participant; or (b) 50% of
the participant's vested interest.  The interest rate on such loans is the prime
rate  as  declared  in the  Wall  Street  Journal  plus  1% at the  time of loan
origination.  Principal and interest is repaid ratably through bi-weekly payroll
deductions.  Loans are  repaid  within 5 years or within 10 years if the loan is
used to acquire the participant's  principal residence.  Interest rates on loans
outstanding as of December 31, 2005 range from 5.00% to 10.00%.

(g) Administrative Expenses

The Company  provides  administrative  support for the Plan and pays for certain
administrative and trustee fees.



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                    NOTES TO FINANCIAL STATEMENTS, Continued
                 FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004               6
--------------------------------------------------------------------------------

NOTE 1 - DESCRIPTION OF PLAN, Continued

(h) Catch-up Contributions

Effective  January 1, 2002,  Participants  who have  attained  age 50 before the
close of the Plan Year shall be eligible to make catch-up  contributions  to the
Plan. The additional  catch-up  contributions  permitted will be $3,000 in 2004,
$4,000 in 2005 and $5,000 in 2006.  Thereafter,  the  catch-up  amount  shall be
indexed for cost-of-living increases in $500 increments.

(i) Rollovers

Distributions from another "qualified" plan may be transferred into the Plan,
provided that the Internal Revenue Code permits a tax-free rollover.  Any amount
so transferred will be placed in a rollover contribution account, which is fully
vested. Withdrawals from rollover contribution accounts other than Plan loans
are not allowed prior to termination of employment.

NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

(a) Basis of Presentation

The accompanying financial statements have been prepared on the accrual basis.

(b) Use of Estimates

The preparation of financial statements in conformity with accounting principles
generally  accepted in the United States of America requires  management to make
estimates  and  assumptions  that  affect  the  reported  amounts  of net assets
available for benefits and  disclosure of contingent  assets and  liabilities at
the date of the financial statements and the changes in net assets available for
benefits  during the reporting  period.  Actual  results could differ from those
estimates.

(c) Risks and Uncertainties

The Plan provides for various  investment  options in any combination of stocks,
bonds, fixed income securities,  mutual funds, and other investment  securities.
Investment  securities  are exposed to various  risks,  such as  interest  rate,
market and credit.  Due to the level of risk associated with certain  investment
securities  and the level of  uncertainty  related  to  changes  in the value of
investment  securities,  it is possible  that  changes in risks in the near term
would materially affect participants'  account balances and the amounts reported
in the  statement of net assets  available  for  benefits  and the  statement of
changes in net assets available for benefits.



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                    NOTES TO FINANCIAL STATEMENTS, Continued
                 FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004               7
--------------------------------------------------------------------------------

NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Continued

(d) Investments and Income Recognition

At  December  31, 2003 the Plan had a contract  with  Connecticut  General  Life
Insurance Company (CIGNA). On April 1, 2004 Prudential Financial,  Inc. acquired
CIGNA and formed Prudential Retirement Insurance and Annuity Company (PRIAC). As
of this date,  the  thirteen  pooled  investment  funds remain the same with the
exception of the fund name changes. The Plan entered into a contract with PRIAC,
where  PRIAC  maintains  contributions  in a  contractholder's  account and such
contributions  are  allocated  to  thirteen  separate  pooled  investment  funds
according to participant  elections.  The accounts are credited with earnings on
the underlying investments and charges for Plan benefits paid and deductions for
investment  expenses,  risk, profit and annual management fees charged by PRIAC.
The pooled  separate  accounts are included in the financial  statements at fair
value.

The  PRIAC  Guaranteed  Long - Term  Account,  which is a  general  account,  is
included  in the  financial  statements  at  contract  value,  (which  represent
contributions  made under the contract,  plus  earnings,  less  withdrawals  and
adminstrative  expenses)  because the account is fully benefit  responsive.  For
example, participants may ordinarily direct the withdrawal or transfer of all or
a portion of their  investment at contract value.  There are no reserves against
contract  value for credit risk of the contract  issuer or  otherwise.  The fair
value of the investment  contract at December 31, 2005 and 2004 was  $18,621,369
and $18,016,308,  respectively.  The average yield and crediting  interest rates
were  approximately  3.45%  and  3.15%  for 2005  and  2004,  respectively.  The
crediting  interest rate is based on an agreed-upon  formula with the issuer and
is evaluated every six months.

On December 29, 2005, the Financial  Accounting  Standards Board (FASB) released
FASB  Staff  Position  nos.  AAG  INV-1  and  SOP  94-4-1,  Reporting  of  Fully
Benefit-Responsive  Investment  Contracts Held by Certain  Investment  Companies
Subject to the AICPA Investment  Company Guide and  Defined-Contribution  Health
and Welfare and Pension Plans (FSP).  The FSP clarifies the  definition of fully
benefit-responsive   investment   contracts  for   contracts   held  by  defined
contribution  plans.  The FSP  also  establishes  enhanced  financial  statement
presentation and disclosure  requirements for defined contribution plans subject
to the FSP effective for financial  statements  issued for periods  ending after
December 15, 2006.



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                    NOTES TO FINANCIAL STATEMENTS, Continued
                 FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004               8
--------------------------------------------------------------------------------

NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Continued

Management  intends to adopt the FSP in the Plan's financial  statements for the
year ended  December  31,  2006.  The effect of the FSP on the Plan's  financial
statements  is expected  to be enhanced  financial  statement  presentation  and
disclosure requirements. Benefit-responsive investment contracts (investments in
bank   collective  investment  funds  that  hold  benefit-responsive  investment
contracts)  will be  presented  at fair  value on the  statement  of net  assets
available for benefits and the amount  representing the difference  between fair
value  and  contract  value of the  investment  contracts  (or  bank  collective
investment  fund) shall be presented on the face of the  statement of net assets
available for benefits as a single amount,  calculated as the sum of the amounts
necessary  to adjust  the  portion  of net  assets  attributable  to each  fully
benefit-responsive  investment  contract from fair value to contract value.  The
statement of changes in net assets available for benefits shall be prepared on a
basis  that  reflects  income  credited  to  participants  in the  Plan  and net
appreciation  or  depreciaiton  in the  fair  value  of  only  those  investment
contracts that are not deemed to be fully benefit responsive.

Old  Republic  International  Corporation  (ORI)  common stock is stated at fair
value based on quoted closing market value on the last business day of the year.

The Plan  presents  in the  statements  of changes in net assets  available  for
benefits the net appreciation  (depreciation) in the fair value of the ORI stock
account,  which  consists  of the  realized  gains or losses and the  unrealized
appreciation (depreciation) of this investment. Investment income is recorded on
the accrual basis. Dividends on stocks are credited to income on the ex-dividend
date.

(e) Benefit Payments

Benefit payments to participants are recorded upon distribution.

NOTE 3 - ASSETS GREATER THAN 5% OF PLAN ASSETS

Investments that represent 5% or more of plan assets are as follows:

                                                                             December 31,
                                                                          2005          2004
                                                                          ----          ----
                                                                             
PRIAC Guaranteed Long-Term Account                                    $18,621,369  $18,016,808
ORI Common Stock                                                        6,855,698   5,660,947
PRIAC Separate Account - Large Cap Value/LSV Asset Management           5,785,133     397,716
PRIAC Stock Market Index Account                                        5,030,516   4,780,275
PRIAC Separate Account - International Blend/The Boston Co.             4,226,456   3,145,958
PRIAC Separate Account - Alliance Balanced Shares Fund                  4,000,136   3,590,278
PRIAC Separate Account - Small Value/Perkins Wolf McDonnell             3,988,436   3,801,090



                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                          NOTES TO FINANCIAL STATEMENTS, Continued
                FOR THE YEARS ENDED DECEMBER 31, 2005 AND 2004                9
--------------------------------------------------------------------------------

NOTE 4 - TAX STATUS

The Internal  Revenue Service has issued a determination  letter,  dated October
23,  2002,  stating  that the Plan is designed  in  accordance  with  applicable
sections of the  Internal  Revenue Code (IRC).  The Plan has been amended  since
receiving the determination letter.  However,  management believes that the Plan
is designed and is currently  being  operated in compliance  with the applicable
requirements of the IRC.

NOTE 5 -  PLAN TERMINATION

Although  it has not  expressed  any intent to do so, the  Company has the right
under the Plan to discontinue its contributions at any time and to terminate the
Plan  subject  to the  provisions  of ERISA.  In the event of plan  termination,
participants  shall become 100 percent vested in their accounts and are entitled
to a distribution of their account balances.

NOTE 6 -  RELATED PARTY TRANSACTIONS

The ORI common stock is stock of Old  Republic  International  Corporation,  the
ultimate  parent of the Company.  Plan assets  include  investments  in thirteen
pooled  investment funds.  These funds are related parties of PRIAC,  which is a
party in interest.




                 GREAT WEST CASUALTY COMPANY PROFIT SHARING PLAN
                              SUPPLEMENTAL SCHEDULE
                                DECEMBER 31, 2005                            10
--------------------------------------------------------------------------------

         Schedule H, Line 4i - Schedule of Assets (Held at End of Year)
         -------------------------------------------------------------

                                                                                                                       (e)Contract/
                                                                                                                          Current
(a)  (b) Identity of Issue                                                  (c) Identity of Issue         (d) Cost         Value
---  ---------------------                                                  ---------------------         --------     -------------
                                                                                                           
 *   PRIAC Guaranteed Long-Term Account                                     Long-term investment fund         **        $18,621,369
 *   PRIAC Stock Market Index Account                                       Short-term investment fund        **          5,030,516
 *   ORI Common Stock                                                       Common Stock                      **          6,855,698
 *   PRIAC Separate Account- Corporate Bond Fund                            Pooled separate account           **            701,770
 *   PRIAC Separate Account- Small Value/Perkins Wolf McDonnell             Pooled separate account           **          3,988,436
 *   PRIAC Separate Account- Alliance Balanced Shares Fund                  Pooled separate account           **          4,000,136
 *   PRIAC Separate Account- Oakmark Select Fund                            Pooled separate account           **          1,532,090
 *   PRIAC Separate Account- Mid Cap Growth/Artisan Partners                Pooled separate account           **          1,794,498
 *   PRIAC Separate Account- Small Cap Growth/TimesSquare Fund              Pooled separate account           **            693,351
 *   PRIAC Separate Account- Lifetime 20                                    Pooled separate account           **            267,192
 *   PRIAC Separate Account- Lifetime 30                                    Pooled separate account           **            263,977
 *   PRIAC Separate Account- Lifetime 40                                    Pooled separate account           **          1,313,433
 *   PRIAC Separate Account- AP Fund                                        Pooled separate account           **              4,376
 *   PRIAC Separate Account- Lifetime 50                                    Pooled separate account           **            737,949
 *   PRIAC Separate Account- Lifetime 60                                    Pooled separate account           **            262,624
 *   PRIAC Separate Account- Large Cap Growth/Turner Investment Partners    Pooledtseparate account           **          1,390,903
 *   PRIAC Separate Account- International Blend/The Boston Co.             Pooled separate account           **          4,226,456
 *   PRIAC Separate Account- Large Cap Value/LSV Asset Managet Management   Pooled separate account           **          5,785,133
 *   Participants Loans                                                     Participant loans, interest rates
                                                                            range from 5.00% to 10.00%,
                                                                            are repaid in a series of
                                                                            substantially equal payments
                                                                            over the term of the loan                     1,788,235
                                                                                                                        ------------
                                                                                                                        $59,258,142
                                                                                                                        ============

*  Party in interest.
** Cost data has been omitted as all investments are participant directed.