06:04 PM EDT, 10/20/2025 (MT Newswires) -- Atai Life Sciences ( ATAI ) said late Monday it has closed its public offering of around 27.3 million shares, including the full exercise of an over-allotment option, raising about $149.5 million.

The clinical-stage biopharmaceutical company said it expects its funds will be sufficient to cover its operations into 2029.

Shares of the company were up about 2% in after-hours activity.