Arch CapitalGroup Ltd. has completed a public of 18 million depositaryshares, each representing a 0.001 interest in a 5.25% series E noncumulative preferredshare.

The company previously said it plans to use the net proceedsfrom the offering to fund a portion of the cash consideration for itsacquisition ofUnited Guaranty Corp.and AIG United Guaranty Insurance(Asia) Ltd. from American International Group Inc., to pay related costsand expenses, and for general corporate purposes.

Credit Suisse Securities (USA) LLC, Merrill Lynch PierceFenner & Smith Inc., Wells Fargo Securities LLC, J.P. Morgan Securities LLCand RBC Capital Markets LLC served as joint book-running managers for theoffering.