carvana co shares were down 4 to 3726 after barrons reported the company will lay off 12 of its staff and after saying it is buying adesas us physical auction business from kar auction services inc for 22 billion the stock hit its 52week low of 3508 earlier in the session carvana stock closed mondays session down 17 according to an email from chief executive ernie garcia reviewed by barrons the company is laying off about 2500 employees primarily in operational positions carvana said the auction business it is buying from kar auction consists of 56 adesa us locations totaling about 65 million square feet of buildings on more than 4000 acres kar auction shares were down 5 to 1228