rr donnelley  sons co said it has accepted a proposal from affiliates of atlas holdings llc to increase the price per share of their pending acquisition to 1035 a share in cash and has entered into an amendment to its previously announced definitive merger agreement from nov 3 rr donnelley shares were halted at 1041 at 121 pm et pending news under the terms of the amended agreement rr donnelley stockholders will receive 1035 in cash for each share they own representing a premium of 215 over 852 the price per share of rr donnelley stock from the original agreement the revised allcash transaction is valued at a total enterprise value of 22 billion and total equity value of 856 million rr donnelley and atlas negotiated the amendment following a determination that an unsolicited proposal from chatham asset management llc constituted a superior proposal as defined in the original agreement chatham proposed to buy all rr donnelley common stock already not owned by chatham and its affiliates for 1025 a share in cash