The nearly 20.17 million B-series shares in SQM sold on Chile's IPSA stock exchange for 31,000 pesos ($49.05) per share.
China's Tianqi Lithium Corp last month said it would buy nearly a quarter of the lithium miner for $4.1 billion, gaining it coveted access to a key ingredient in rechargeable batteries that power mobile phones and electric cars.
(Reporting by Dave Sherwood; Editing by Chizu Nomiyama)