EXHIBIT 10.06
                                TOWER GROUP, INC.

                          CAPITAL SECURITY CERTIFICATE

         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS  AMENDED  (THE  "SECURITIES  ACT"),  ANY STATE  SECURITIES  LAWS OR ANY OTHER
APPLICABLE   SECURITIES   LAW.   NEITHER  THIS  SECURITY  NOR  ANY  INTEREST  OR
PARTICIPATION  HEREIN MAY BE REOFFERED,  SOLD, ASSIGNED,  TRANSFERRED,  PLEDGED,
ENCUMBERED  OR  OTHERWISE  DISPOSED  OF IN THE ABSENCE OF SUCH  REGISTRATION  OR
UNLESS SUCH  TRANSACTION  IS EXEMPT  FROM,  OR NOT SUBJECT TO, THE  REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS. THE
HOLDER OF THIS  SECURITY  BY ITS  ACCEPTANCE  HEREOF  AGREES  TO OFFER,  SELL OR
OTHERWISE  TRANSFER  THIS  SECURITY  ONLY (A) TO THE  SPONSOR OR THE TRUST,  (B)
PURSUANT TO A REGISTRATION  STATEMENT THAT HAS BEEN DECLARED EFFECTIVE UNDER THE
SECURITIES  ACT,  (C) TO A  PERSON  WHOM THE  SELLER  REASONABLY  BELIEVES  IS A
QUALIFIED  INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
144A SO LONG AS THIS  SECURITY IS ELIGIBLE  FOR RESALE  PURSUANT TO RULE 144A IN
ACCORDANCE WITH RULE 144A, (D) TO A NON-U.S.  PERSON IN AN OFFSHORE  TRANSACTION
IN ACCORDANCE  WITH RULE 903 OR RULE 904 (AS  APPLICABLE)  OF REGULATION S UNDER
THE SECURITIES ACT, (E) TO AN  INSTITUTIONAL  "ACCREDITED  INVESTOR"  WITHIN THE
MEANING  OF  SUBPARAGRAPH  (A) OF RULE  501  UNDER  THE  SECURITIES  ACT THAT IS
ACQUIRING THIS CAPITAL SECURITY FOR ITS OWN ACCOUNT,  OR FOR THE ACCOUNT OF SUCH
AN INSTITUTIONAL  ACCREDITED  INVESTOR,  FOR INVESTMENT  PURPOSES AND NOT WITH A
VIEW TO, OR FOR OFFER OR SALE IN CONNECTION  WITH, ANY DISTRIBUTION IN VIOLATION
OF THE SECURITIES ACT, OR (F) PURSUANT TO ANY OTHER AVAILABLE EXEMPTION FROM THE
REGISTRATION  REQUIREMENTS OF THE SECURITIES  ACT,  SUBJECT TO THE SPONSOR'S AND
THE  TRUST'S  RIGHT  PRIOR TO ANY SUCH  OFFER,  SALE OR  TRANSFER TO REQUIRE THE
DELIVERY  OF AN OPINION  OF  COUNSEL,  CERTIFICATION  AND/OR  OTHER  INFORMATION
SATISFACTORY  TO EACH  OF  THEM IN  ACCORDANCE  WITH  THE  DECLARATION  (DEFINED
HEREIN), A COPY OF WHICH MAY BE OBTAINED FROM THE SPONSOR OR THE TRUST.  HEDGING
TRANSACTIONS  INVOLVING THIS SECURITY MAY NOT BE CONDUCTED  UNLESS IN COMPLIANCE
WITH THE SECURITIES ACT.

         THE HOLDER OF THIS  SECURITY  BY ITS  ACCEPTANCE  HEREOF  ALSO  AGREES,
REPRESENTS  AND  WARRANTS  THAT  IT  IS  NOT  AN  EMPLOYEE  BENEFIT,  INDIVIDUAL
RETIREMENT  ACCOUNT  OR  OTHER  PLAN OR  ARRANGEMENT  SUBJECT  TO TITLE I OF THE
EMPLOYEE  RETIREMENT  INCOME  SECURITY  ACT OF 1974,  AS AMENDED  ("ERISA"),  OR
SECTION 4975 OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE "CODE") (EACH
A "PLAN"),  OR AN ENTITY WHOSE UNDERLYING ASSETS INCLUDE "PLAN ASSETS" BY REASON
OF ANY PLAN'S INVESTMENT IN THE ENTITY, AND NO PERSON INVESTING "PLAN ASSETS" OF
ANY PLAN MAY ACQUIRE OR HOLD THE SECURITIES OR ANY INTEREST THEREIN, UNLESS SUCH
PURCHASER  OR HOLDER IS  ELIGIBLE  FOR  EXEMPTIVE  RELIEF  AVAILABLE  UNDER U.S.
DEPARTMENT OF LABOR PROHIBITED  TRANSACTION CLASS EXEMPTION 96-23, 95-60, 91-38,
90-1 OR 84-14 OR ANOTHER  APPLICABLE  EXEMPTION  OR ITS  PURCHASE AND HOLDING OF
THIS  SECURITY IS NOT  PROHIBITED BY SECTION 406 OF ERISA OR SECTION 4975 OF THE
CODE WITH RESPECT TO SUCH  PURCHASE OR HOLDING.  ANY  PURCHASER OR HOLDER OF THE
SECURITIES  OR ANY INTEREST  THEREIN WILL BE DEEMED TO HAVE  REPRESENTED  BY ITS
PURCHASE AND HOLDING THEREOF THAT EITHER (i) IT IS NOT AN EMPLOYEE  BENEFIT PLAN
WITHIN THE MEANING OF SECTION 3(3) OF ERISA,  OR A PLAN TO WHICH SECTION 4975 OF
THE CODE IS  APPLICABLE,  A  TRUSTEE  OR OTHER  PERSON  ACTING  ON  BEHALF OF AN
EMPLOYEE BENEFIT PLAN OR PLAN, OR ANY OTHER PERSON OR ENTITY USING THE ASSETS OF
ANY  EMPLOYEE  BENEFIT  PLAN OR PLAN TO  FINANCE  SUCH  PURCHASE,  OR (ii)  SUCH
PURCHASE WILL NOT RESULT IN A PROHIBITED  TRANSACTION UNDER SECTION 406 OF ERISA
OR  SECTION  4975 OF THE CODE FOR  WHICH  THERE IS NO  APPLICABLE  STATUTORY  OR
ADMINISTRATIVE EXEMPTION.

         THIS  SECURITY  WILL BE ISSUED  AND MAY BE  TRANSFERRED  ONLY IN BLOCKS
HAVING A LIQUIDATION  AMOUNT OF NOT LESS THAN  $100,000.00  (100 SECURITIES) AND
MULTIPLES OF $1,000.00 IN EXCESS THEREOF.  ANY ATTEMPTED  TRANSFER OF SECURITIES
IN A BLOCK HAVING A LIQUIDATION  AMOUNT OF LESS THAN $100,000.00 SHALL BE DEEMED
TO BE VOID AND OF NO LEGAL EFFECT WHATSOEVER.

         THE  HOLDER  OF THIS  SECURITY  AGREES  THAT IT WILL  COMPLY  WITH  THE
FOREGOING RESTRICTIONS.

         THIS  SECURITY  IS IN  REGISTERED  FORM  WITHIN THE MEANING OF TREASURY
REGULATIONS  SECTION  1.871-14(c)(1)(i)  FOR U.S. FEDERAL INCOME AND WITHHOLDING
TAX PURPOSES.

         IN  CONNECTION  WITH ANY  TRANSFER,  THE  HOLDER  WILL  DELIVER  TO THE
REGISTRAR AND TRANSFER AGENT SUCH  CERTIFICATES AND OTHER  INFORMATION AS MAY BE
REQUIRED BY THE  DECLARATION  TO CONFIRM  THAT THE  TRANSFER  COMPLIES  WITH THE
FOREGOING RESTRICTIONS.









                Certificate Number P-1       13,000 Capital Securities

                                December 21, 2004

             Certificate Evidencing Floating Rate Capital Securities

                                       of

                         Tower Group Statutory Trust IV

               (liquidation amount $1,000.00 per Capital Security)

         Tower Group  Statutory  Trust IV, a statutory  trust  created under the
laws of the State of Delaware (the "Trust"), hereby certifies that Merrill Lynch
International  (the  "Holder"),  is  the  registered  owner  of  13,000  capital
securities  of the Trust  representing  undivided  beneficial  interests  in the
assets of the Trust,  (liquidation  amount $1,000.00 per capital  security) (the
"Capital  Securities").  Subject to the  Declaration  (as  defined  below),  the
Capital  Securities  are  transferable  on the books and records of the Trust in
person or by a duly authorized attorney, upon surrender of this Certificate duly
endorsed and in proper form for  transfer.  The Capital  Securities  represented
hereby  are  issued  pursuant  to,  and  the  designation,  rights,  privileges,
restrictions,  preferences  and  other  terms  and  provisions  of  the  Capital
Securities  shall in all respects be subject to, the  provisions  of the Amended
and  Restated  Declaration  of Trust of the Trust dated as of December 21, 2004,
among  Michael  H.  Lee,   Francis  M.   Colalucci  and  Steven  G.  Fauth,   as
Administrators,  Chase  Mahattan  Bank USA,  National  Association,  as Delaware
Trustee,  JPMorgan Chase Bank, National Association,  as Institutional  Trustee,
Tower Group,  Inc.,  as Sponsor,  and the holders from time to time of undivided
beneficial  interests in the assets of the Trust,  including the  designation of
the terms of the Capital  Securities as set forth in Annex I to such amended and
restated  declaration  as the  same  may be  amended  from  time  to  time  (the
"Declaration").  Capitalized  terms used herein but not  defined  shall have the
meaning given them in the Declaration. The Holder is entitled to the benefits of
the Guarantee and the Indenture to the extent provided therein. The Sponsor will
provide a copy of the  Declaration,  the  Guarantee,  and the  Indenture  to the
Holder without charge upon written request to the Sponsor at its principal place
of business.

         Upon receipt of this Security,  the Holder is bound by the  Declaration
and is entitled to the benefits thereunder.

         By acceptance of this Security,  the Holder agrees to treat, for United
States  federal  income tax purposes,  the  Debentures as  indebtedness  and the
Capital Securities as evidence of beneficial ownership in the Debentures.

         This  Capital  Security  is  governed  by,  and shall be  construed  in
accordance with, the laws of the State of Delaware, without regard to principles
of conflict of laws.

                       SIGNATURES APPEAR ON FOLLOWING PAGE







         IN WITNESS WHEREOF, the Trust has duly executed this certificate.

                                       Tower Group STATUTORY TRUST IV



                                       By: /s/ Francis M. Colalucci
                                       --------------------------------
                                         Name: Francis M. Colalucci
                                         Title:  Administrator


                          CERTIFICATE OF AUTHENTICATION

         This   is  one  of  the   Capital   Securities   referred   to  in  the
within-mentioned Declaration.


                                       JPMORGAN CHASE BANK, NATIONAL
                                       ASSOCIATION,
                                       as the Institutional Trustee


                                       By: /s/ Maria D. Calzado
                                       --------------------------------
                                            Authorized Officer







                          [REVERSE OF CAPITAL SECURITY]

         Distributions  payable on each  Capital  Security  will be payable at a
variable per annum rate of interest, reset quarterly, equal to LIBOR (as defined
in the  Declaration)  plus 3.40% (the "Coupon  Rate") of the stated  liquidation
amount of $1,000  per  Capital  Security,  such  Coupon  Rate  being the rate of
interest  payable on the  Debentures  to be held by the  Institutional  Trustee.
Distributions  in arrears for more than one quarterly  period will bear interest
thereon  compounded  quaraterly at the then applicable Coupon Rate for each such
quarterly  period  (to the  extent  permitted  by  applicable  law).  The  terms
"Distributions" as used herein includes cash distributions,  any such compounded
distributions and any Additional Sums payable on the Debentures unless otherwise
stated.  A Distribution  is payable only to the extent that payments are made in
respect of the Debentures  held by the  Institutional  Trustee and to the extent
the  Institutional  Trustee has funds legally  available in the Property Account
therefor.  The amount of  Distributions  payable for any period will be computed
for any full  quarterly  Distribution  period on the basis of a 360-day year and
the actual number of days elapsed in the relevant Distribution Payment Period.

         The Interest Rate for any Distribution Period will at no time be higher
than the maximum rate then permitted by New York law as the same may be modified
by United States law.

         All  percentages   resulting  from  any  calculations  on  the  Capital
Securities will be rounded, if necessary,  to the nearest one hundred-thousandth
of a percentage  point,  with five  one-millionths of a percentage point rounded
upward (e.g.,  9.876545% (or .09876545) being rounded to 9.87655% (or .0987655),
and all  dollar  amounts  used in or  resulting  from such  calculation  will be
rounded to the nearest cent (with one-half cent being rounded upward)).

         Except as  otherwise  described  below,  Distributions  on the  Capital
Securities  will be cumulative,  will accrue from the date of original  issuance
and will be payable  quarterly in arrears on March 15, June 15, September 15 and
December  15 of each year or if such day is not a  Business  Day,  then the next
succeeding  Business  Day (each  such  date,  a  "Distribution  Payment  Date"),
commencing on the Distribution  Payment Date in March 2005. The Debenture Issuer
has the  right  under  the  Indenture  to  defer  payments  of  interest  on the
Debentures,  so long as no  Indenture  Event  of  Default  has  occurred  and is
continuing,  by extending the interest  payment  period for up to 20 consecutive
quarterly periods (each an "Extension Period") at any time and from time to time
on the  Debentures,  subject to the  conditions  described  below,  during which
Extension  Period no interest  shall be due and  payable.  During any  Extension
Period, interest will continue to accrue on the Debentures, and interest on such
accrued interest will accrue at an annual rate equal to the Distribution Rate in
effect for each such Extension Period,  compounded  quarterly from the date such
interest  would have been payable were it not for the Extension  Period,  to the
extent  permitted  by law (such  interest  referred  to  herein  as  "Additional
Interest").  No  Extension  Period may end on a date  other than a  Distribution
Payment Date. At the end of any such Extension Period the Debenture Issuer shall
pay all  interest  then  accrued  and unpaid on the  Debentures  (together  with
Additional Interest thereon);  PROVIDED,  HOWEVER,  that no Extension Period may
extend  beyond the Maturity  Date.  Prior to the  termination  of any  Extension
Period, the Debenture Issuer may further extend such period,  provided that such
period  together  with all such  previous  and  further  consecutive  extensions
thereof shall not exceed 20 consecutive  quarterly periods, or extend beyond the
Maturity Date. Upon the termination of any Extension Period and upon the payment
of all accrued and unpaid interest and Additional Interest, the Debenture Issuer
may commence a new Extension Period, subject to the foregoing  requirements.  No






interest or  Additional  Interest  shall be due and payable  during an Extension
Period,  except at the end thereof,  but each installment of interest that would
otherwise  have been due and payable  during such  Extension  Period  shall bear
Additional Interest.  During any Extension Period,  Distributions on the Capital
Securities  shall be deferred for a period  equal to the  Extension  Period.  If
Distributions are deferred, the Distributions due shall be paid on the date that
the related  Extension Period  terminates,  to Holders of the Securities as they
appear on the books and  records  of the Trust on the  record  date  immediately
preceding such date.  Distributions  on the Securities must be paid on the dates
payable  (after giving  effect to any  Extension  Period) to the extent that the
Trust has funds available for the payment of such  distributions in the Property
Account of the Trust.  The  Trust's  funds  available  for  Distribution  to the
Holders  of the  Securities  will be  limited  to  payments  received  from  the
Debenture  Issuer.  The payment of Distributions out of moneys held by the Trust
is guaranteed by the Guarantor pursuant to the Guarantee.

         The  Capital   Securities  shall  be  redeemable  as  provided  in  the
Declaration.







                                   ASSIGNMENT

         FOR VALUE RECEIVED,  the undersigned assigns and transfers this Capital
Security Certificate to:

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         (Insert assignee's social security or tax identification number)

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         (Insert address and zip code of assignee) and irrevocably appoints

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         agent to transfer this Capital Security Certificate on the books of the
Trust. The agent may substitute another to act for him or her.

         Date:
              ---------------------------------------

         Signature:
                   ----------------------------------

         (Sign  exactly as your name  appears on the other side of this  Capital
Security Certificate)

         Signature Guarantee:(1)


- --------

(1)      Signature  must be  guaranteed by an "eligible  guarantor  institution"
         that is a bank,  stockbroker,  savings and loan  association  or credit
         union  meeting  the  requirements  of  the  Security  registrar,  which
         requirements  include  membership or  participation  in the  Securities
         Transfer Agents  Medallion  Program  ("STAMP") or such other "signature
         guarantee  program" as may be determined  by the Security  registrar in
         addition to, or in substitution  for, STAMP, all in accordance with the
         Securities Exchange Act of 1934, as amended.