NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES

The New York Stock Exchange hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on October 31, 2008, pursuant to the provisions of Rule 12d2-2 (a).

[  X  ] 17 CFR 240.12d2-2(a)(3)  That on October 20, 2008 the instruments representing the securities comprising the entire class of this security came to evidence, by operation of law or otherwise, other securities in substitution therefore and represent no other right except, if such be the fact, the right  to receive an immediate cash payment.

The merger between Darwin Professional Underwriters, Inc. and Allied World Merger Company, an indirect wholly owned subsidiary of Allied World Assurance Company Holdings, Ltd. became effective on October 20, 2008.  Each share of Common Stock of Darwin Professional Underwriters, Inc. was converted into $32.00 in cash per share.

The Exchange also notifies the Securities and Exchange Commission that as a result of the above indicated conditions this security was suspended from trading on October 21, 2008.