X0202 4 2007-07-23 1 0000898018 MOUNTAIN BANK HOLDING CO 623852100 0001235249 BOWEN HAHTO SUSAN 22717 105TH CT E BUCKLEY WA 98321 1 0 0 0 Common Stock 2007-07-23 4 D 0 32765 D 0 D Common Stock 2007-07-23 4 D 0 2100 D 0 I Spouse Employee Stock Option (Right to Buy) 15 2007-07-23 4 D 0 267 D 2019-06-15 Common Stock 267 0 D Disposed of pursuant to merger agreement between issuer and Columbia Banking System, Inc. in exchange for 13,862 shares of Columbia Banking System common stock having a value of $23.54 per share based on the exchange ratio. This option,which provided for vesting in three equal annual installments beginning June 15, 2007, was assumed by Columbia Banking System, Inc. in the merger and replaced with an option to purchase 216 shares of Columbia Banking Systems common stock for $18.51. Susan K. Bowen-Hahto 2007-07-23