Vale also informs that on this date it started the new buyback program, which is limited to the maximum acquisition of 500 million common shares and their respective ADRs. The new program will be implemented over the next 18 months, starting from the date of the Board's deliberation, which took place on April 27, 2022… On May 17, Vale announced : Vale receives third-party assurance for additional low- carbon nickel products. About 83% of Vale's Class 1 nickel now has an independently verified carbon footprint, underscoring Vale's commitment to delivering low-carbon metals while ensuring responsible carbon data management and transparency… Norilsk Nickel [LSX: MNOD] ( OTCPK:NILSY ) On April 25, Norilsk Nickel announced : "Nornickel and Rosatom sign cooperation agreement…" On April 29, Norilsk Nickel announced : "Nornickel develops first operations centre at smelter…"