Private investment firm Chatham Asset Management LLC on Tuesday outbid an earlier offer from Atlas Holdings LLC for printing company R.R. Donnelley & Sons Co. . Chatham said it would pay $9.10 a share for R.R. Donnelley, higher than a Nov. 3 offer of $8.52 a share from Atlas Holdings. Chatham would increase its price to $9.34 a share if the Atlas termination fee is eliminated. Chatham said its offer is worth $47.9 million to $67.9 million more than Atlas' offer. Chatham currently manages funds that own about 14.9% of the outstanding common stock of R.R. Donnelley.