southwestern energy co shares were down 10 to 497 after the company said a previously announced underwritten block trade of 64 million common shares by certain shareholders who received their shares as part of southwestern energys acquisition of indigo natural resources llc had priced the company said the offering would result in total proceeds to the selling stockholders of 3282 million southwestern energy said it wouldnt sell any shares in the offering and wont receive any proceeds from the sale by the selling stockholders the offering is expected to close wednesday