Deep Fission (FISN) has priced its initial public offering of 2.5 million common shares at $16 each for total gross proceeds of $40 million, the nuclear-energy startup said late Wednesday.

Underwriters have been granted a 30-day option to purchase up to an additional 375,000 shares.

Net proceeds will be used for working capital and general corporate purposes, the company said.

Closing is expected to occur on June 22, subject to customary closing conditions.

Shares are expected to debut on the Nasdaq Global Market this Thursday under the ticker "FISN."