UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 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): December 31, 2008

                          Willis Group Holdings Limited
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             (Exact Name of Registrant as Specified in Its Charter)

                                     Bermuda
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                 (State or Other Jurisdiction of Incorporation)

           001-16503                                   98-0352587
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    (Commission File Number)               (IRS Employer Identification No.)

                            c/o Willis Group Limited
                                 51 Lime Street
                            London EC3M 7DQ, England
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                    (Address of Principal Executive Offices)

                               (44) (20) 7488-8111
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              (Registrant's Telephone Number, Including Area Code)

                                 Not Applicable
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          (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 5.02 Compensatory Arrangements of Certain Officers. On December 31, 2008, Willis Group Holdings Limited (the "Company") entered into the First Amendment to the Fourth Amended and Restated Employment Agreement, between the Company, Willis North America Inc., and Joseph J. Plumeri (the "Amendment"). The Amendment makes a number of changes to (i) make Mr Plumeri's employment agreement compliant with IRS Code Section 409A regarding the taxation of deferred compensation; (ii) clarify that the Company will gross-up the actual amount of tax paid on certain benefits that the Company has already agreed to gross-up, and (iii) clarify that the payment of certain benefits due "promptly" after a termination will be within 30 days. The Amendment also updates the performance targets and conditions applicable to the option to purchase the Company's shares granted, in accordance with the Fourth Amended and Restated Employment Agreement, to Mr. Plumeri on May 6, 2008 (the "Option") under the Willis Group Holdings Limited 2001 Share Purchase and Option Plan (the "2001 Plan") following the acquisition of Hilb Rogal & Hobbs Company ("HRH") which was completed on October 1, 2008, to match those performance targets previously approved by the Compensation Committee of the Board of Directors for all other 2008 option grants. As provided in the 2001 Plan, the Compensation Committee of the Board of Directors may make adjustments to the targets originally set to take into account, among other things, extraordinary transactions and mergers. On June 8, 2008, the Company updated its financial targets for 2009 and 2010, subject to the completion of its acquisition of HRH, to Adjusted EPS of $3.15 to $3.25 and Adjusted Operating Margin of 24% for 2009, and Adjusted EPS of $4.05 to $4.15 and Adjusted Operating Margin of 27% for 2010. Following the closing of the transaction, on October 21, 2008 the Compensation Committee of the Board of Directors of the Company voted to approve and adopt these performance targets for 2009 and 2010 as the performance targets contained in the option grants made on May 6, 2008, to its senior executive officers under the Willis Group Holdings Limited 2008 Share Purchase and Option Plan. The Compensation Committee of the Board of Directors of the Company voted on December 29, 2008 to similarly approve and adopt these performance targets for 2009 and 2010 as the performance targets contained in the Option granted to Mr. Plumeri. Because the transaction closed earlier than expected, rather than adjusting the targets for 2008 the Compensation Committee agreed that the financial targets should stay the same but be based on results for the Company exclusive of HRH. A copy of the First Amendment to the Fourth Amended and Restated Employment Agreement is attached hereto and is incorporated by reference. This discussion includes references to non-GAAP financial measures as defined in Regulation G of SEC rules. We present such non-GAAP financial measures, as we believe such information is of interest to the investment community because it provides additional meaningful methods of evaluating certain aspects of the Company's operating performance from period to period on a basis that may not be otherwise apparent on a GAAP basis. These financial measures should be viewed in addition to, not in lieu of, the Company's condensed consolidated financial statements. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. 10.1 First Amendment dated December 31, 2008 to the Fourth Amended and Restated Employment Agreement between Willis Group Holdings Limited, Willis North America Inc., and Joseph J. Plumeri.

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. WILLIS GROUP HOLDINGS LIMITED Date: January 5, 2009 By: /s/ Adam G. Ciongoli ------------------------- Name: Adam G. Ciongoli Title: General Counsel

EXHIBIT INDEX Exhibit No. Description - ----------- ----------- 10.1 First Amendment dated December 31, 2008 to the Fourth Amended and Restated Employment Agreement between Willis Group Holdings Limited, Willis North America Inc., and Joseph J. Plumeri.

                                                                    Exhibit 10.1

                                 FIRST AMENDMENT

                                       TO

              THE FOURTH AMENDED AND RESTATED EMPLOYMENT AGREEMENT

     This  FIRST  AMENDMENT  (this  "Amendment")  is  dated  as the  31st day of
December,  2008,  by and  between  WILLIS  GROUP  HOLDINGS  LIMITED,  a  company
established under the laws of Bermuda ("Willis Holdings"),  WILLIS NORTH AMERICA
INC.  (collectively  with Willis  Holdings,  "Employer")  and JOSEPH J.  PLUMERI
("Executive").

     WHEREAS,  Executive has been employed by Employer  pursuant to the terms of
the Fourth Amended and Restated Employment  Agreement,  dated as of February 29,
2008 (the "Employment Agreement"); and

     WHEREAS,  the parties desire to amend the  Employment  Agreement to further
comply  with,  or be exempt  from,  Internal  Revenue  Code Section 409A and the
regulations  and  guidance  promulgated  thereunder  to  the  extent  applicable
(collectively "Section 409A"); and

     WHEREAS, on October 21, 2008 the Compensation  Committee of Willis Holdings
revised  the  performance  targets  for the stock  options  granted to all other
senior  Associates  under the Willis Partners Plan grant of May 6, 2008 in light
of the  acquisition  of Hilb  Rogal & Hobbs  Company  ("HRH")  and seek to treat
Executive  the same in the grants  issued  pursuant to the  requirements  of the
Employment Agreement; and

     WHEREAS,  the  parties  desire to make  certain  changes to the  Employment
Agreement as set forth herein.

     NOW,  THEREFORE,  in  consideration  of the mutual  covenants  and promises
contained  herein  and  for  other  valuable  consideration,   the  receipt  and
sufficiency  of which are  hereby  acknowledged,  the  parties  hereby  agree as
follows:

1. Section 3(d)(i)(x) of the Employment  Agreement is hereby amended by changing
"promptly"  to  "within  thirty  (30)  days"  where the  former  appears in such
Section.

2. The first  sentence in Section  4(b) of the  Employment  Agreement  is hereby
amended by changing  "highest  marginal rates" and "highest  effective rates" to
"actual tax rates" and "actual tax rates"  respectively  where the former appear
in such Section.

3. The first sentence of Section  7(l)(i) of the Employment  Agreement is hereby
amended  by adding  the phrase  "or be exempt  therefrom"  in between  the words
"thereunder" and "and" where they appear in such sentence.

4. Section 7(l)(ii) of the Employment  Agreement is hereby amended by (i) adding
the phrase "subject to Section 409A" in between the words  "benefits" and "upon"
where they appear in the first  sentence of such  Section and (ii)  deleting the
phrase "or the  provision of any benefit that is specified  herein as subject to
this Section or is  otherwise"  where it appears in the second  sentence of such
Section, and "or benefit" where it appears later in the same sentence.

5. The first sentence of Section 7(l)(iii) of the Employment Agreement is hereby amended by (i) adding the phrase "or otherwise" in between the words "hereof" and "that" where they appear in such sentence, and (ii) deleting the phrase "or pays such related tax" where it appears in such sentence. 6. Section 7(l)(v)(x) of the Employment Agreement is hereby amended by changing all the references to "excise" to "additional" where the former appears in such Section. 7. Section 7(l)(v)(y) of the Employment Agreement is hereby amended by (i) changing the word "must" to "shall" where the former appears in the third sentence of such Section; (ii) deleting the phrase "within the ten (10) business days immediately following the date that the amount of such excess is finally determined" where such phrase appears in the third sentence of such Section; and (iii) adding the phrase "but in all events within the time period specified in (iii) above" at the end of the last sentence of such Section. 8. The fourth sentence in Exhibit A of the Employment Agreement is hereby amended by adding the phrase "and the last sentence of this paragraph, and shall be distributed at the earlier of the annual meeting in 2011 or when Executive incurs "a separation from service" as defined in Section 409A" at the end thereof. 9. Exhibit B attached to the Employment Agreement is hereby replaced in its entirety by the Exhibit B attached hereto which sets forth the revised performance targets for the stock options granted under the Employment Agreement. 10. By signing below, Executive reaffirms Executive's agreement to abide by the terms and conditions the Employment Agreement (subject to the terms of this Amendment). 11. The Recitals set forth above constitute operative provisions hereof and are deemed incorporated in the operative text of this Amendment. 12. Except as expressly amended and modified by this Amendment, the Employment Agreement shall remain in full force and effect. 13. If there is any conflict between the terms of the Employment Agreement and this Amendment, the terms of this Amendment shall prevail. 14. Employer shall promptly pay Executive's reasonable legal and financial advisory fees incurred in connection with entering into this Amendment and shall, to the extent such amounts would be taxable to Executive, fully gross up such payments so that Executive shall have no net after-tax cost in respect of such payments. Any reimbursement hereunder that is treated as taxable income shall be paid to Executive promptly and in accordance with Section 7(l)(iii) of the Employment Agreement. 2

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment as of the date first above written. WILLIS NORTH AMERICA, INC. By: _________________________________ Name: _________________________________ Title: _________________________________ AND, signed as a Deed and delivered By WILLIS GROUP HOLDINGS LIMITED ) ________________________________ ) Director ) ________________________________ Director/Secretary EXECUTIVE: _________________________________ Joseph J. Plumeri 3

EXHIBIT B --------- Stock Option Grant Given that the shareholders of the Company approved a new equity plan at the 2008 annual general shareholder's meeting, and that the Executive as provided in his then-effective contract, was promptly thereafter awarded 1,700,000 options at the fair market value on the date of grant, such grant shall be subject to earning and vesting, as follows: 1. Earning of 1,200,000 based on earnings per share and operating budgets for calendar 2008, 2009 and 2010 with a catch-up in 2010 for nonvesting in 2008 and 2009, as follows: (x) EPS At least Options Earned --- -------- -------------- 2008 $2.85 200,000 2009 $3.15 200,000 2010 $4.05 200,000 plus any unearned options from 2008 or 2009 (y) Operating Margin Target Options Earned ---------------- ------ -------------- 2008 24.0% 200,000 2009 24.0% 200,000 2010 27.0% 200,000 plus any unearned options from 2008 or 2009 (z) Kicker Target Options Earned ------ ------ -------------- 2010 EPS Exceed 250,000 $4.15 Annual Average At least 250,000 TSR from 2008-2010 S&P 500 & 1.5% The targets for 2008 shall be based on Willis Holdings only results, ignoring the effects of Hilb Rogal & Hobbs Company which was acquired by the Willis Holdings on October 1, 2008. The Compensation Committee will have discretion to treat the kicker options as earned if targets are not met for reasons beyond Executive's control. To be considered in good faith by the Compensation Committee and Board. 4

2. Options shall have at least a 7-year term (or such longer term as provided in grants to other executives at or about the time of grant) with two years (not to go beyond the original term) to exercise after later of (A) the end of the relevant performance period, if applicable, and (B) death, Disability Termination, Termination without Cause or Termination for Good Reason, any termination on or after annual meeting in 2011 or Mutual Retirement. If employed at the time of the annual meeting in 2011, the earned options will be exercisable from that date forward. If not so employed because of any of the foregoing events, options will be exercisable from the dates provided in the prior sentence. If termination is for Cause or without Good Reason (and, in both cases, not either after the annual meeting in 2011 or as a result of Mutual Retirement), the options shall be forfeited upon such termination. 3. In the event of termination as a result of death, Disability Termination, Termination without Cause, Termination for Good Reason, any employment condition is waived but performance criteria remain for Options not then earned. 4. In the event of a Mutual Retirement, the employment condition is waived with respect to Options theretofore earned. 5. In the event of a Change in Control of the Company before the end of 2010 (if Executive is then employed by the Company or his employment had terminated prior thereto on a basis covered by paragraph 3 above), all performance criteria are deemed satisfied, but, if then employed, the employment obligation remains until the annual meeting in 2011 or an earlier Termination without Cause, Termination for Good Reason, Mutual Retirement, death or incurring of a Disability Termination; also fully vests and the Options become immediately exercisable if a Good Reason event occurs after a Change in Control and Executive agrees to waive it. 6. All criteria will be adjusted for change in GAAP, mergers, acquisitions, dispositions, material change in actual stock repurchases as compared to budgeted repurchases for purposes of calculating the projected EPS or other material corporate event, as determined in good faith by the Compensation Committee. 7. There will be no forfeiture provisions (other than above forfeiture for nonvesting) and no post-employment restrictions in grant. 8. Forms of grants will be agreed by Company and Executive in good faith. 9. All terms shall have the same meaning as in the Employment Agreement. 5