Pulte Homes (PH) agreed to buy Del Webb (WBB) for $40.51 per share, subject to adjustments.
Marshall & Ilsley (MI) will buy National City Bancorp (NCBM) on the basis of 0.58462 Marshall share per National City share.
All shares of STV Group (STVI) not owned by STV Inc. are to be exchanged for $11.25 cash per share.
Chemical Financial (CHFC) will buy Bank West (BWFC) for $11.50 per share.
On Assignment (ASGN) hired Lehman Bros. to assist it in evaluating options.
Carl Icahn will proceed with due diligence efforts in regard to VISX Inc. (EYE); Icahn says VISX is showing "sincere" interest in a sale at $32 per share cash.
BFMA Holding Corp. offered to buy the remaining shares of Mortons Restaurant Group (MRG) for $28.25 per share cash.