Exhibit 10.6

FOURTH AMENDMENT AGREEMENT AND WAIVER

THIS FOURTH AMENDMENT AGREEMENT AND WAIVER, dated as of April 3, 2013 (this
“Agreement”) is between Tower Group, Inc., a Delaware corporation (the
“Borrower”), each lender party hereto (collectively, the “Lenders” and
individually, a “Lender”), and Bank of America, N.A., as Administrative Agent,
Fronting Bank and L/C Administrator (“Bank of America”).

WHEREAS, the Borrower, the Lenders and Bank of America are parties to the
Amended and Restated Credit Agreement, dated as of February 15, 2012, as amended
by the First Amendment to Credit Agreement, dated as of June 22, 2012, as
amended by the Second Amendment to Credit Agreement and Consent, dated
November 26, 2012, as amended by the Letter Agreement, dated as of January 23,
2013, and as amended by the Limited Waiver and Amendment, dated as of March 3,
2013 (as so amended, the “Credit Agreement”). Terms defined in the Credit
Agreement are, unless otherwise defined herein or the context otherwise
requires, used herein as defined therein.

WHEREAS, the Borrower has given notice to the Administrative Agent and the
Lenders that it is not in compliance with Section 7.02(g) of the Credit
Agreement (the “Section 7.02 Default”).

WHEREAS, the Lenders have agreed to waive the Section 7.02 Default pursuant to
and upon the terms and conditions of this Agreement (the “Waiver”). Consistent
with the foregoing, nothing contained herein is intended or shall be deemed to
constitute an acknowledgment, representation, warranty, covenant, or other
agreement on the part of the Lenders that they have agreed or they will agree
(i) to enter into any amendment to the Credit Agreement and the other Loan
Documents on any terms and conditions other than as set forth herein or (ii) to
any waiver relating to any Default or Event of Default other than the
Section 7.02 Default.

NOW, THEREFORE, in consideration of the premises and for other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged),
the parties hereto agree as follows:

1. AMENDMENT TO CREDIT AGREEMENT. Section 7.02(g) of the Credit Agreement is
amended by replacing “$126,200,000” with “$275,000,000”.

2. LIMITED WAIVER. Subject to the terms and conditions of this Agreement, the
Lenders hereby agree to waive the Section 7.02 Default, effective April 3, 2013,
subject to the provisions of Section 4 hereof.

3. REAFFIRMATION. All provisions of the Credit Agreement and the other Loan
Documents shall continue in full force and effect in accordance with the
provisions thereof, and the Borrower reaffirms all its agreements under the
Credit Agreement and the Loan Documents, notwithstanding the occurrence of the
Section 7.02 Default.

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4. CONDITIONS TO EFFECTIVENESS. This Agreement will be effective once this
Agreement shall have been executed and delivered by the Borrower, the
Administrative Agent, and the Required Lenders.

5. REPRESENTATIONS AND WARRANTIES. To induce the Lenders and the Administrative
Agent to enter into this Agreement, the Borrower represents and warrants to the
Administrative Agent and each Lender as follows:

5.1 Due Authorization, Non-Contravention, etc. The execution, delivery and
performance of this Agreement by the Borrower are within its powers, have been
duly authorized by all necessary action, and do not:

(a) contravene its Organization Documents;

(b) contravene any contractual restriction, law or governmental regulation or
court decree or order binding on or affecting the Borrower or any of its
Subsidiaries; or

(c) result in, or require the creation or imposition of, any Lien on any of the
properties of the Borrower or any of its Subsidiaries.

5.2 Defaults. The Section 7.02 Default is the only Default or Event of Default
that has occurred and is continuing.

5.3 Credit Agreement Representations and Warranties. The representations and
warranties set forth in Article VI of the Credit Agreement are true and correct
with the same effect as if made as of the date hereof (unless stated to relate
solely to an earlier date, in which case such representations and warranties
shall be true and correct as of such earlier date).

5.4 Validity, etc. This Agreement constitutes the legal, valid and binding
obligation of the Borrower enforceable against the Borrower in accordance with
its terms.

6. MISCELLANEOUS.

6.1 Limited Waiver; Continuing Effectiveness, etc. This Agreement shall be
strictly limited to its terms. In this Agreement, the Lenders waive no Default
or Event of Default, whether presently or subsequently existing except for the
Section 7.02 Default. This Agreement shall be deemed to be an amendment to the
Credit Agreement, and the Credit Agreement, as amended hereby, shall remain in
full force and effect and is hereby ratified, approved and confirmed in each and
every respect. After the amendments set forth herein have become effective, all
references to the Credit Agreement in the Loan Documents or in any other
document, instrument, agreement or writing shall be deemed to refer to the
Credit Agreement as amended hereby. Each other Loan Document is hereby ratified,
approved and confirmed in each and every respect.

6.2 Payment of Costs and Expenses. The Borrower agrees to pay on demand all
reasonable expenses of the Administrative Agent (including the reasonable fees
and out-of-pocket expenses of counsel to the Administrative Agent) in connection
with the negotiation, preparation, execution and delivery of this Agreement and
the transactions contemplated hereby.

 

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6.3 Severability. Any provision of this Agreement which is prohibited or
unenforceable in any jurisdiction shall, as to such provision and such
jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions of this Agreement
or affecting the validity or enforceability of such provision in any other
jurisdiction.

6.4 Headings. The various headings of this Agreement are inserted for
convenience only and shall not affect the meaning or interpretation of this
Agreement or any provisions hereof.

6.5 Execution in Counterparts. This Agreement may be executed by the parties
hereto in several counterparts, each of which shall be deemed to be an original
and all of which shall constitute together but one and the same agreement.
Delivery of an executed counterpart hereof, or signature page hereto, to the
Administrative Agent by facsimile or in a .pdf or similar file shall be
effective as delivery of a manually-executed counterpart hereof.

6.6 Governing Law. THIS AGREEMENT SHALL BE DEEMED TO BE A CONTRACT MADE UNDER
AND GOVERNED BY THE INTERNAL LAWS OF THE STATE OF NEW YORK.

6.7 Successors and Assigns. This Agreement shall be binding upon and shall inure
to the benefit of the parties hereto and their respective successors and
assigns.

[Signature Pages Follow]

 

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed as of the date first above written.

 

TOWER GROUP, INC. By:  

/s/ Vito A. Nigro

Name:  

Vito A. Nigro

Title:  

Managing VP and Treasurer

Limited Waiver and Fourth Amendment Agreement

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BANK OF AMERICA, N.A., as Administrative Agent, L/C Administrator, Fronting Bank
and Lender By:  

/s/ Tiffany Burgess

Name:  

Tiffany Burgess

Title:  

Vice President

Limited Waiver and Fourth Amendment Agreement

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JPMORGAN CHASE BANK, N.A. By:  

/s/ Hector J. Verona

Name:  

Hector J. Verona

Title:  

Vice President

Limited Waiver and Fourth Amendment Agreement

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KEYBANK NATIONAL ASSOCIATION By:  

/s/ James Cribbet

Name:  

James Cribbet

Title:  

Senior Vice President

Limited Waiver and Fourth Amendment Agreement

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PNC BANK, NATIONAL ASSOCIATION By:  

/s/ Gustavus A. Bahr

Name:  

Gustavus A. Bahr

Title:  

Senior Vice Presidentpp

Limited Waiver and Fourth Amendment Agreement

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WELLS FARGO BANK, N.A. By:  

/s/ Robert P. Callahan

Name:  

Robert P. Callahan

Title:  

Director

Limited Waiver and Fourth Amendment Agreement