CHICAGO—  RR Donnelley (RRD)  has received a revised proposal from its largest investor, Chatham Asset Management, as the bidding war over the future of North America's largest printerintensifies. It has received a proposal from Chatham RRD largest share holder to acquire all of the RRD shares that it does not already own for $10.25 cash per share . Chatham previous offer was $9.10 per share, while a deal for RRD to be taken over by Atlas Holdings had already been agreed at $8.52 per share. Atlas Holdings also owns LSC Communications, one of three companies formed when the old RR Donnelley & Sons group was split up in 2017. RRD board has stated  “At this time, the board has not determined that the Revised Chatham Proposal or the Go-Shop Proposal constitutes a Superior Proposal, and there can be no assurances that a transaction will result from either proposal or that any alternative transaction will be entered into or consummated.”