International Paper (IP) has submitted a definitive proxy statement to the U.S. Securities and Exchange Commission related to its pending acquisition of DS Smith Plc (DITHF) . IP moves a step closer to finalizing the deal, which will strengthen its corrugated packaging business in Europe and prioritize sustainable packaging.The acquisition is expected to be accretive to International Paper’s earnings in the first year of closure and provide at least $514 million of pre-tax cash synergies on an annual run-ra ...