Exhibit 15
| PricewaterhouseCoopers LLP 300 Madison Avenue New York NY 10017 Telephone (646) 471-3000 www.pwc.com |
November 10, 2008
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Commissioners:
We are aware that our report dated November 7, 2008 on our review of interim financial information of Arch Capital Group Ltd. and its subsidiaries (the “Company”) for the three-month and nine-month periods ended September 30, 2008 and September 30, 2007 and included in the Company’s quarterly report on Form 10-Q for the quarter ended September 30, 2008 is incorporated by reference in the Registration Statement on Forms S-3 (Registration No. 33-34499, Registration No. 333-82612, Registration No. 333-110190, Registration No. 333-117099 and Registration No. 333-135421) and in the Registration Statements on Forms S-8 (Registration No. 33-99974, Registration No. 333-86145, Registration No. 333-72182, Registration No. 333-82772, Registration No. 333-98971, Registration No. 333-124422 and Registration No. 333-142835).
Very truly yours, |
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/s/ PricewaterhouseCoopers LLP |
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