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DDD<>3D Systems Corp.'s public offering of 3.7 million common shares priced at an 8.7% discount to Wednesday's close.

Shares were down 4.6% at $28.19 in light premarket trading, but up from the offering's price of $27 each.

The 3D printing-services provider said late Tuesday it planned to use the proceeds for future acquisitions, working capital and general corporate purposes