-- Spruce Biosciences (SPRB) said late Monday it commenced an underwritten public offering of common shares or related prefunded warrants.
The company expects to grant underwriters a 30-day option to buy up to 15% more stock at the public offering price, less underwriting discounts and commissions.
The offering is subject to market and other conditions, Spruce said.
Spruce shares fell 13% in after-hours trading.