RETENTION AND CHANGE IN CONTROL AGREEMENT Agreement, made as of the 5th day of May 2000, by and between Arch Capital Group Ltd., a Delaware corporation (the "Company"), and Robert Clements (the "Executive"). WHEREAS, the board of directors of the Company (the "Board") wishes to assure that it will have the continued dedication of the Executive and the availability of his advice and counsel notwithstanding the possibility, threat or occurrence of a bid to take over control of the Company, and to induce the Executive to remain in the service of the Company; and WHEREAS, the Executive is willing to continue to serve the Company or one of its subsidiaries taking into account the provisions of this Agreement; NOW, THEREFORE, in consideration of the foregoing, and the respective covenants and agreements of the parties herein contained, the parties agree as follows: 1. Position & Responsibilities: The Board retains the Executive to serve as Chairman of the Board, and in such capacity the Executive shall report to the Board, and the Executive shall accept said retention. The term of the Executive's retention shall terminate upon notice by either the Company to the Executive or by the Executive to the Company. 2. Compensation: Compensation for the Executive's services shall be at an annual base salary rate equal to 50% of the then annual base salary of the President and Chief Executive Officer of the Company. The Executive may also receive an annual cash bonus to be determined by the Board. The annual salary for each year shall be payable in shares of restricted common stock of the Company based on the fair market value of the shares of common stock of the Company on January 1 of that year, except in the case of the salary for 2000, which shall be based on the fair market value of the shares of common stock of the Company on May 5, 2000. The shares of restricted stock granted as salary for any year shall fully vest on January 1 of the following year. If the Executive's service as chairman is terminated for any reason, he shall receive an amount equal to a prorated portion of his salary for that year. 3. Additional Terms: The Executive is eligible to participate in the Company's 1995 and 1999 Long Term Incentive and Share Award Plans under which annual awards of options and/or other stock-based awards may be granted by the Board or its duly authorized committee. 4. Definitions. (i) "Change in Control" means any of the following occurring after the date hereof: (A) any person (within the meaning of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), other than a Permitted Person or an Initial Investor, is or becomes the "beneficial owner" (as defined in Rule 13d-3 under the Exchange Act), directly or 2 indirectly, of Voting Securities representing 35% or more of the total voting power of all the then outstanding Voting Securities; or (B) any Initial Investor is or becomes the "beneficial owner" (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of Voting Securities representing 50% or more of the total voting power of all the then outstanding Voting Securities; or (C) the individuals who, as of the date hereof, constitute the Board together with those who become directors subsequent to such date and whose recommendation, election or nomination for election to the Board was approved by a vote of at least a majority of the directors then still in office who either were directors as of such date or whose recommendation, election or nomination for election was previously so approved, cease for any reason to constitute a majority of the members of the Board; or (D) the consummation of a merger, consolidation, recapitalization, liquidation, sale or disposition by the Company of all or substantially all of the Company's assets, or reorganization of the Company, other than any such transaction which would (x) result in at least 60% of the total voting power represented by the voting securities of the surviving entity or, in the case of an asset sale, the successor entity, outstanding immediately after such transaction being beneficially owned, directly or indirectly, by the stockholders of the Company immediately preceding the transaction and (y) not otherwise be deemed a Change in Control under clause (A), (B), (C) or (E) of this subsection (i); or (E) the Board adopts a resolution to the effect that, for purposes hereof, a Change in Control has occurred. (ii) "Change in Control Date" means any date during the term of this Agreement on which a Change in Control occurs. (iii) "Initial Investors" means (A) The Trident Partnership, L.P.; (B) Marsh & McLennan Risk Capital Holdings, Ltd.; or (C) any majority-owned subsidiary or parent (or equivalent in the case of a non-corporate entity) of the foregoing. (iv) "Permitted Persons" means (A) the Company; (B) any Related Party; or (C) any group (as defined in Rule 13d-3 under the Exchange Act) comprised of any or all of the foregoing. (v) "Protection Period" means the period beginning on the Change in Control Date and ending on the second anniversary of the Change in Control Date. (vi) "Related Party" means (A) a majority-owned subsidiary of the Company; (B) a trustee or other fiduciary holding securities under an employee benefit plan of the Company or any majority-owned subsidiary of the Company; or (C) a corporation owned directly or indirectly by the stockholders of the Company in substantially the same proportion as their ownership of Voting Securities. 3 (vii) "Voting Security" means any security of the Company which carries the right to vote generally in the election of directors. 5. Acceleration of Vesting Upon Change in Control. All stock options and restricted stock issued under the Company's 1995 and 1999 Long Term Incentive and Share Award Plans (or any successor plan) shall become immediately vested in full and, in the case of stock options, immediately exercisable in full, upon a Change in Control in accordance with the applicable restricted stock agreements and stock option agreements. 6. Termination Following Change in Control. The Executive shall be entitled to the benefits provided in Section 7 hereof upon any termination of his service as Chairman of the Board within a Protection Period, except a termination of such service (a) because of his death, (b) because of a "Disability," (c) by the Company or any of its subsidiaries for "Cause," or (d) by the Executive other than due to "Constructive Termination." No benefits shall be paid under Section 7 of this Agreement if the Executive's service terminates outside of a Protection Period, whether or not a Change in Control is then contemplated. (i) Disability. The Executive's services shall be deemed to have terminated because of a "Disability" if, for a period of twelve consecutive months, the Executive is incapable of substantially fulfilling his responsibilities with the Company because of physical or mental incapacity resulting from injury, sickness or disease. Any question as to the existence, extent or potentiality of the Executive's Disability upon which the Executive and the Company cannot agree shall be determined by a qualified, independent physician selected by the Company and approved by the Executive (which approval shall not be unreasonably withheld). The determination of any such physician shall be final and conclusive for all purposes of this Agreement. The Executive or his legal representative or any adult member of his immediate family shall have the right to present to such physician such information and arguments as to the Executive's Disability as he, she or they deem appropriate, including the opinion of the Executive's personal physician. (ii) Cause. Termination of the Executive's service by the Company or any of its subsidiaries for "Cause" shall mean termination by reason of the Executive's willful engagement in conduct which involves dishonesty or moral turpitude in connection with his service and which is demonstrably and materially injurious to the financial condition or reputation of the Company. An act or omission shall be deemed "willful" only if done, or omitted to be done, in bad faith and without reasonable belief that it was in the best interest of the Company. Notwithstanding the foregoing, the Executive shall not be deemed to have been terminated for Cause unless and until there shall have been delivered to the Executive a written notice of termination from the compensation committee of the Board after reasonable notice to the Executive and an opportunity for him, together with his counsel, to be heard before such committee. (iii) Without Cause. The Company or any of its subsidiaries may terminate the service of the Executive without Cause during a Protection Period only by giving the Executive written notice of termination to that effect. In that event, the Executive's service shall 4 terminate on the last day of the month in which such notice is given (or such later date as may be specified in such notice), and the benefits set forth in Section 7 hereof shall be provided to the Executive. (iv) Constructive Termination. Termination of service by the Executive due to "Constructive Termination" shall mean termination by the Executive subsequent to any of the following: (A) the assignment of duties and responsibilities inconsistent in any material and adverse respect with the Executive's position or a significant diminution in his duties or responsibilities; provided, however, that Constructive Termination shall not be deemed to occur upon a change in duties or responsibilities that is solely and directly a result of the Company no longer being a publicly traded entity, and does not involve any other event set forth in this definition; (B) a reduction in the Executive's base salary or bonus opportunity; (C) the requirement that the Executive work at a location outside of Fairfield County, Connecticut, or Westchester County, New York; (D) the failure to provide the Executive with benefits and incentive compensation opportunities at least as favorable, in the aggregate, as the benefits and incentive compensation opportunities available to the Executive immediately prior to a Change in Control; or (E) if the Company has failed to obtain the assumption of the obligations contained in this Agreement by any successor as contemplated in Section 12(c) hereof. The Executive shall exercise his right to terminate his services due to Constructive Termination by giving the Company a written notice of termination specifying in reasonable detail the circumstances constituting such Constructive Termination. In that event, the Executive's services shall terminate on the last day of the month in which such notice is given unless an earlier date is specified in writing by the Executive. A termination of services by the Executive shall be due to Constructive Termination if one of the occurrences specified in this subsection (iv) shall have occurred, notwithstanding that the Executive may have other reasons for terminating service, including employment by another company which the Executive desires to accept. 7. Benefits Upon Termination Within Protection Period. If, within a Protection Period, the Executive's services with the Company and its subsidiaries shall be terminated (a) by the Company or any of its subsidiaries other than for Cause and other than because of a Disability or death, or (b) by the Executive due to Constructive Termination, the Executive shall be entitled to the benefits provided for below: 5 (i) The Company shall pay to the Executive, through the date of the Executive's termination of services, salary at the rate then in effect; (ii) The Company shall pay to the Executive an amount equal to the product of (A) the amount of the Executive's annual bonus for the year preceding the year that includes the Change in Control Date (or the year that includes the termination date, if higher), multiplied by (B) a fraction, the numerator of which is the number of days elapsed in the calendar year through the date of termination of the Executive's services, and the denominator of which is 365; and such payment shall be made in a lump sum within 10 business days after the date of such termination of services; and (iii) The Company shall pay to the Executive an amount equal to 2.99 times the sum of (A) the Executive's annual base salary in effect on the Change in Control Date (or the date of termination, if higher), and (B) the Executive's annual bonus for the year preceding the year that includes the Change in Control Date (or the year that includes the termination date, if higher); and such payment shall be made in a lump sum within 10 business days after the date of such termination of services. 8. Non-Exclusivity of Rights. Nothing in this Agreement shall prevent or limit the Executive's continuing or future participation in any benefit, bonus, policies or programs provided by the Company or any of its subsidiaries and for which the Executive may qualify, nor shall anything herein limit or otherwise affect such rights as the Executive may have under any stock option or other agreements with the Company or any of its subsidiaries; provided, however, that amounts payable hereunder are in lieu of any severance benefit payable under any other severance plan or agreement of the Company or its subsidiaries in effect on the date hereof. Amounts which are vested benefits or which the Executive is otherwise entitled to receive under any plan, practice, policy or program of the Company or any of its subsidiaries at or subsequent to the date of termination of the Executive's services shall be payable in accordance with such plan, practice, policy or program. 9. Full Settlement; Legal Expenses. The Company's obligation to make the payments provided for in this Agreement and otherwise to perform its obligations hereunder shall not be affected by any set-off, counterclaim, recoupment, defense or other claim, right or action which the Company or any of its subsidiaries may have against the Executive or others. In no event shall the Executive be obligated to seek other employment or take any other action by way of mitigation of the amounts payable to the Executive under any of the provisions of this Agreement, and amounts payable hereunder will not be reduced by compensation the Executive receives from other employment. The Company agrees to pay, upon written demand therefor by the Executive, all legal fees and expenses which the Executive may reasonably incur as a result of any dispute or contest by or with the Company or others regarding the validity or enforceability of, or liability under, any provision of this Agreement (including as a result of any contest by the Executive about the amount of any payment hereunder), plus in each case interest at the applicable federal rate provided for in Section 7872(f)(2) of the Internal Revenue Code of 1986, as amended (the "Code"), unless the Company prevails on all causes of action in the dispute or contest. In any such action brought by the Executive for damages or to enforce any provisions of this Agreement, the Executive shall be entitled to seek both legal and eq- 6 uitable relief and remedies, including, without limitation, specific performance of the Company's obligations hereunder, in the Executive's sole discretion. 10. Limitation on Payments by the Company. Anything in this Agreement to the contrary notwithstanding, in the event that any payment or distribution made, or benefit provided (including, without limitation, the acceleration of any payment, distribution or benefit and the acceleration of exercisability of any stock option) by the Company to or for the benefit of the Executive (whether paid or payable or distributed or distributable pursuant to the terms of this Agreement or otherwise) would be subject to the excise tax imposed by Section 4999 of the Code as an "excess parachute payment" (within the meaning of Section 280G of the Code), the payment set forth in Section 7(iii) hereof shall be reduced to the smallest extent possible such that no amount payable hereunder constitutes an "excess parachute payment" (within the meaning of Section 280G of the Code). 11. Confidential Information; Nonsolicitation of Employees and Customers. The Executive shall hold in a fiduciary capacity for the benefit of the Company and its subsidiaries all secret or confidential information, knowledge or data relating to the Company or any of its subsidiaries, and their respective businesses, which shall have been obtained by the Executive during the Executive's services with the Company or any of its subsidiaries (except for information, knowledge or data which shall be or subsequently become known or generally available to the public other than by acts of the Executive or his representatives in violation of this Agreement). After the date of termination of the Executive's services with the Company or any of its subsidiaries, the Executive shall not, without the prior written consent of the Company, communicate or divulge any such information, knowledge or data to anyone other than the Company and those designated by the Company. The Executive shall return to the Company at the time of the termination of the Executive's services with the Company or any of its subsidiaries all tangible property of the Company or any its subsidiaries in the Executive's possession, including, but not limited to, confidential information relating to the Company or any of its subsidiaries. The Executive shall not, during the term of his retention by the Company or any of its subsidiaries and for one year thereafter, directly or indirectly, on behalf of the Executive or any other person or entity, (i) induce, or seek to induce, any employee of the Company or any of its subsidiaries to terminate services with the Company or any of its subsidiaries or (ii) solicit business from any person, firm or company which is (during the period the Executive is employed by the Company or any of its subsidiaries), or at the time of the termination of the Executive was, a customer of the Company or any of its subsidiaries, or induce, or seek to induce, any such customer of the Company or any of its subsidiaries to cease doing business with the Company or any of its subsidiaries. In the event of a breach or threatened breach by the Executive of any provision of this Section 11, the Executive acknowledges that the Company and its subsidiaries shall be entitled to an injunction restraining the Executive from such act or threatened act, in addition to monetary damages and any other available remedies. The Executive hereby expressly consents and agrees that, for any breach or threatened breach of any provision of this Section 11, a restraining order and/or an injunction may be issued against the Executive in addition to any other rights the Company or any of its subsidiaries may have with respect to such violation or breach. In no event shall an asserted violation of the provisions of this Section 11 constitute a basis for deferring or withholding any amounts otherwise payable to the Executive under this Agreement. The provisions of this Section 11 shall apply to the Executive whether or not there has been a Change in Control. 7 12. Successors. (a) This Agreement is personal to the Executive and without the prior written consent of the Company shall not be assignable by the Executive otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Executive's legal representatives or successors in interest. (b) This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns. (c) The Company will require any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company to assume expressly and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform it if no such succession had taken place. For this purpose, any company that becomes directly owned by stockholders of the Company pursuant to a merger or consolidation in which the Company becomes a wholly owned subsidiary of such company shall be deemed to be a successor of the Company. As used in this Agreement, "Company" shall mean the Company as hereinbefore defined and any successor to its business and/or assets as aforesaid which assumes and agrees (or is required hereunder to assume and agree) to perform this Agreement by operation of law or otherwise. A subsequent Change in Control of a successor shall be considered a Change in Control under Section 4 hereof upon termination of Executive's employment with the successor within a Protection Period. 13. Miscellaneous. (a) This Agreement shall be governed by and construed in accordance with the laws of the State of Connecticut, without reference to principles of conflict of laws. The captions of this Agreement are not part of the provisions hereof and shall have no force or effect. This Agreement may not be amended or modified otherwise than by a written agreement executed by the parties hereto or their respective successors and legal representatives. (b) All notices and other communications hereunder shall be in writing and shall be given by hand delivery to the other party or by registered or certified mail, return receipt requested, postage prepaid, addressed as follows: If to the Executive: Robert Clements 104 Wallachs Point Drive Stamford, CT 06902 If to the Company: Arch Capital Group Ltd. 20 Horseneck Lane Greenwich, CT 06830 Attention: General Counsel 8 or to such other address as either party shall have furnished to the other in writing in accordance herewith. Notice and communications shall be effective when actually received by the addressee. (c) The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement. (d) The Company or any of its subsidiaries may withhold from any amounts payable under this Agreement such federal, state or local taxes as shall be required to be withheld pursuant to any applicable law or regulation. (e) The Executive's failure to insist upon strict compliance with any provision hereof shall not be deemed to be a waiver of such provision or any other provision thereof. (f) This Agreement contains the entire understanding of the Company and the Executive with respect to the subject matter hereof but, except as otherwise expressly stated herein, does not supersede or override the provisions of any stock option, employee benefit or other plan, program, policy or practice in which the Executive is a participant or under which the Executive is a beneficiary. (g) The parties expressly agree that if prior to a Change in Control the Board determines to terminate the Executive's services, this Agreement shall terminate and the Executive shall not be entitled to any benefits hereunder (other than under Section 7(i) of this Agreement), whether or not a Change in Control is then contemplated. 9 IN WITNESS WHEREOF, the Executive has hereunto set his hand and, pursuant to the authorization from its Board of Directors, the Company has caused this Agreement to be executed as of the date first above written. ARCH CAPITAL GROUP LTD. By: /s/ Peter A. Appel ---------------------------------------------- Name: Peter A. Appel Title: President and Chief Executive Officer EXECUTIVE: /s/ Robert Clements -------------------------------------------------- Robert Clements