0001701108 2024-09-09 2024-09-09 Common Stock, $0.001 par value per share false 0001701108 8-K 2024-09-09 SPERO THERAPEUTICS, INC. DE 001-38266 46-4590683 675 Massachusetts Avenue 14th Floor Cambridge MA 02139 (857) 242-1600 false false false false SPRO NASDAQ false