0001619856 2022-05-12 2022-05-12 false 0001619856 8-K 2022-05-12 Caribou Biosciences, Inc. DE 001-40631 45-3728228 2929 7th Street, Suite 105 Berkeley CA 94710 (510) 982-6030 false false false false Common Stock, $0.0001 par value per share CRBU NASDAQ true false