"The Board of Directors of Central Coalfields limited at its meeting held on March 3, 2017 has considered and approved the buy-back of 5,21,000 fully paid equity shares of face value of Rs 1,000 each from the members of CCl on a proportionate basis through tender offer... for an aggregate amount not exceeding Rs 1,001.88 crore...," the miner said in a regulatory filing to BSE.