$SPRO: Spero Therapeutics, Inc. - Common Stock
2026-01-21 SPRO 2026-01-21 14:03:32 2.35 2.33 -0.83% SPRO 2026-01-21 15:02:22 2.34 2.33 -1.66% SPRO 2026-01-21 16:03:19 2.37 2.35 -0.83% SPRO 2026-01-21 17:02:22 2.39 2.10 -0.83% SPRO 2026-01-21 18:03:13 2.39 2.12 -0.84% SPRO 2026-01-21 21:05:25 0.00 0.00 -0.84% 2026-01-22 SPRO 2026-01-22 05:02:22 3.77 1.02 -0.84% SPRO 2026-01-22 06:03:14 2.56 2.10 -0.84% SPRO 2026-01-22 08:03:14 2.56 2.31 -0.84% SPRO 2026-01-22 09:02:16 2.56 2.10 -0.84% SPRO 2026-01-22 10:03:15 2.56 2.12 -0.84% SPRO 2026-01-22 11:02:17 2.39 2.37 1.68% SPRO 2026-01-22 12:03:10 2.44 2.43 3.78% SPRO 2026-01-22 13:02:25 2.42 2.41 2.94% SPRO 2026-01-22 14:03:23 2.46 2.45 4.20% SPRO 2026-01-22 15:02:24 2.43 2.42 3.36% SPRO 2026-01-22 16:03:18 2.43 2.42 2.94% SPRO 2026-01-22 17:02:11 2.72 2.41 4.20% SPRO 2026-01-22 18:03:16 2.72 2.12 4.24% SPRO 2026-01-22 21:03:35 0.00 0.00 4.24% 2026-01-23 SPRO 2026-01-23 05:02:25 3.79 1.02 4.24% SPRO 2026-01-23 06:03:23 2.68 2.23 4.24% SPRO 2026-01-23 07:02:32 2.93 2.27 4.24% SPRO 2026-01-23 08:03:15 2.93 2.42 4.24% SPRO 2026-01-23 09:02:25 2.93 2.43 4.24% SPRO 2026-01-23 10:03:16 2.81 2.23 4.24% SPRO 2026-01-23 11:02:26 2.44 2.43 -0.42% SPRO 2026-01-23 12:03:10 2.45 2.44 0.00% SPRO 2026-01-23 13:02:27 2.44 2.43 -0.85% SPRO 2026-01-23 14:03:11 2.46 2.45 0.00% SPRO 2026-01-23 15:02:31 2.44 2.43 -0.42% SPRO 2026-01-23 16:03:16 2.43 2.42 -0.85% SPRO 2026-01-23 17:02:19 2.48 2.37 -0.42% SPRO 2026-01-23 18:03:21 2.48 2.29 -0.41% SPRO 2026-01-23 21:04:08 0.00 0.00 -0.41% 2026-01-26 SPRO 2026-01-26 05:02:23 3.79 1.02 -0.41% SPRO 2026-01-26 06:03:15 2.63 2.10 -0.41% SPRO 2026-01-26 08:03:13 2.64 2.31 -0.41% SPRO 2026-01-26 09:02:21 2.64 2.35 -0.41% SPRO 2026-01-26 11:02:17 2.39 2.37 -2.45% SPRO 2026-01-26 12:03:12 2.40 2.39 -1.63% SPRO 2026-01-26 13:02:15 2.43 2.42 0.00% SPRO 2026-01-26 14:03:23 2.44 2.43 0.00% SPRO 2026-01-26 16:03:20 2.45 2.44 0.82% SPRO 2026-01-26 17:02:17 2.45 2.35 0.82% SPRO 2026-01-26 18:03:11 2.45 2.29 0.82% SPRO 2026-01-26 19:02:32 2.50 2.29 0.82% SPRO 2026-01-26 21:05:10 0.00 0.00 0.82% 2026-01-27 SPRO 2026-01-27 05:02:20 3.92 1.03 0.82% SPRO 2026-01-27 06:03:26 2.93 2.14 0.82% SPRO 2026-01-27 08:03:16 2.45 2.14 0.82% SPRO 2026-01-27 09:02:20 2.70 2.33 0.82% SPRO 2026-01-27 10:03:23 2.45 2.17 -3.28% SPRO 2026-01-27 11:02:24 2.44 2.43 -0.41% SPRO 2026-01-27 12:03:15 2.39 2.37 -2.46% SPRO 2026-01-27 14:03:13 2.36 2.35 -4.10% SPRO 2026-01-27 16:03:10 2.37 2.35 -3.69% SPRO 2026-01-27 17:02:20 2.46 2.27 -3.28% SPRO 2026-01-27 18:03:12 2.43 2.27 -3.27% SPRO 2026-01-27 21:03:41 0.00 0.00 -3.27% SPRO 2026-01-27 22:05:59 2.43 2.27 -3.27% 2026-01-28 SPRO 2026-01-28 05:02:28 3.79 1.02 -3.27% SPRO 2026-01-28 06:03:16 2.65 2.17 -3.27% SPRO 2026-01-28 08:03:12 2.57 2.17 -3.27% SPRO 2026-01-28 10:03:08 2.41 2.35 2.04% SPRO 2026-01-28 11:02:17 2.29 2.27 -3.27% SPRO 2026-01-28 12:03:11 2.30 2.29 -3.27% SPRO 2026-01-28 13:02:15 2.29 2.27 -3.27% SPRO 2026-01-28 15:02:18 2.28 2.27 -4.08% SPRO 2026-01-28 16:03:32 2.27 2.25 -4.08% SPRO 2026-01-28 17:02:34 3.29 2.21 -5.71% SPRO 2026-01-28 18:03:22 2.31 2.21 -5.91% SPRO 2026-01-28 19:02:26 2.65 2.21 -5.91% SPRO 2026-01-28 20:03:15 2.65 2.27 -5.91% SPRO 2026-01-28 21:04:57 0.00 0.00 -5.91% 2026-01-29 SPRO 2026-01-29 05:02:21 3.56 2.15 -5.91% SPRO 2026-01-29 06:03:21 2.93 2.15 -5.91% SPRO 2026-01-29 08:03:12 2.71 2.15 -5.91% SPRO 2026-01-29 11:02:18 2.27 2.25 2.11% SPRO 2026-01-29 12:03:15 2.23 2.22 0.00% SPRO 2026-01-29 13:02:25 2.25 2.24 1.27% SPRO 2026-01-29 14:03:15 2.25 2.23 0.84% SPRO 2026-01-29 15:02:49 2.26 2.25 1.27% SPRO 2026-01-29 17:02:25 3.19 2.21 1.27% SPRO 2026-01-29 18:03:24 2.30 2.21 1.35% SPRO 2026-01-29 19:02:22 2.30 2.24 1.35% SPRO 2026-01-29 21:04:19 0.00 0.00 1.35% 2026-01-30 SPRO 2026-01-30 05:02:22 3.59 0.96 1.35% SPRO 2026-01-30 06:03:22 2.93 2.02 1.35% SPRO 2026-01-30 08:03:21 2.44 2.20 1.35% SPRO 2026-01-30 10:03:15 2.44 2.21 1.35% SPRO 2026-01-30 11:02:21 2.25 2.23 -0.90% SPRO 2026-01-30 12:03:12 2.23 2.21 -1.79% SPRO 2026-01-30 13:02:24 2.21 2.20 -1.79% SPRO 2026-01-30 14:03:10 2.23 2.22 -0.90% SPRO 2026-01-30 16:03:08 2.23 2.21 -0.90% SPRO 2026-01-30 17:02:27 2.25 2.18 -2.69% SPRO 2026-01-30 18:01:11 8-K Sec report https://www.sec.gov/Archives/edgar/data/1701108/000119312526032004/0001193125-26-032004-index.htm 8-K - Spero Therapeutics, Inc. (0001701108) (Filer) SPRO 2026-01-30 18:03:14 2.25 2.18 -2.67% SPRO 2026-01-30 19:02:22 2.25 2.19 -2.67% SPRO 2026-01-30 21:05:54 0.00 0.00 -2.67% 2026-02-02 SPRO 2026-02-02 05:02:15 3.43 0.93 -2.67% SPRO 2026-02-02 06:03:09 2.38 1.94 -2.67% SPRO 2026-02-02 10:03:15 2.38 2.12 -2.67% SPRO 2026-02-02 11:02:17 2.17 2.16 -0.89% SPRO 2026-02-02 12:03:12 2.19 2.18 0.00% SPRO 2026-02-02 13:02:22 2.20 2.19 0.89% SPRO 2026-02-02 14:03:10 2.23 2.22 2.22% SPRO 2026-02-02 15:02:36 2.25 2.24 3.11% SPRO 2026-02-02 16:03:29 2.26 2.25 3.56% SPRO 2026-02-02 17:02:17 2.29 2.21 2.22% SPRO 2026-02-02 18:03:21 2.29 2.21 2.28% SPRO 2026-02-02 21:06:20 0.00 0.00 2.28% 2026-02-03 SPRO 2026-02-03 05:02:16 3.56 0.95 2.28% SPRO 2026-02-03 06:03:12 2.50 2.29 3.20% SPRO 2026-02-03 08:03:08 2.37 2.29 3.20% SPRO 2026-02-03 09:02:19 2.50 2.20 3.20% SPRO 2026-02-03 10:03:12 2.28 2.20 3.20% SPRO 2026-02-03 11:02:14 2.23 2.21 -0.91% SPRO 2026-02-03 12:03:11 2.18 2.17 -1.83% SPRO 2026-02-03 13:02:28 2.14 2.12 -3.65% SPRO 2026-02-03 14:03:20 2.11 2.10 -5.48% SPRO 2026-02-03 15:02:21 2.12 2.10 -4.57% SPRO 2026-02-03 16:03:17 2.15 2.14 -3.65% SPRO 2026-02-03 17:02:20 2.29 2.02 -3.65% SPRO 2026-02-03 18:03:16 2.29 2.02 -3.59% SPRO 2026-02-03 19:02:20 2.50 2.02 -3.59% SPRO 2026-02-03 21:06:52 0.00 0.00 -3.59% 2026-02-04 SPRO 2026-02-04 05:02:23 2.42 2.25 -3.59% SPRO 2026-02-04 06:03:13 2.33 2.27 -3.59% SPRO 2026-02-04 07:02:19 2.30 2.27 5.83% SPRO 2026-02-04 08:03:05 2.31 2.25 5.83% SPRO 2026-02-04 10:03:14 2.28 2.25 5.83% SPRO 2026-02-04 11:02:16 2.25 2.24 4.93% SPRO 2026-02-04 12:03:27 2.23 2.22 4.04% SPRO 2026-02-04 13:02:22 2.21 2.20 3.14% SPRO 2026-02-04 14:03:32 2.25 2.23 4.93% SPRO 2026-02-04 15:02:23 2.26 2.25 5.83% SPRO 2026-02-04 16:03:15 2.29 2.27 6.73% SPRO 2026-02-04 17:02:12 2.31 2.25 6.73% SPRO 2026-02-04 18:03:12 2.31 2.20 7.01% SPRO 2026-02-04 21:07:03 0.00 0.00 7.01% 2026-02-05 SPRO 2026-02-05 05:02:31 3.66 0.97 7.01% SPRO 2026-02-05 06:03:17 2.64 2.19 7.01% SPRO 2026-02-05 08:03:16 2.58 2.22 7.01% SPRO 2026-02-05 10:03:13 2.29 2.22 7.01% 2026-02-06 SPRO 2026-02-06 10:05:13 2.60 2.31 0.87% SPRO 2026-02-06 11:02:18 2.34 2.33 2.18% SPRO 2026-02-06 12:03:16 2.38 2.37 2.62% SPRO 2026-02-06 13:02:24 2.39 2.37 4.37% SPRO 2026-02-06 16:03:19 2.42 2.41 5.68% SPRO 2026-02-06 17:02:22 2.44 2.33 5.68% SPRO 2026-02-06 18:03:12 2.48 2.33 6.52% SPRO 2026-02-06 19:02:19 2.60 2.33 6.52% SPRO 2026-02-06 21:02:51 0.00 0.00 6.52% 2026-02-09 SPRO 2026-02-09 05:02:25 3.77 0.97 6.52% SPRO 2026-02-09 06:03:19 2.84 2.04 6.52% SPRO 2026-02-09 07:02:24 2.63 2.04 6.52% SPRO 2026-02-09 08:03:14 2.68 2.04 6.52% SPRO 2026-02-09 09:02:21 2.68 2.06 6.52% SPRO 2026-02-09 11:02:20 2.34 2.31 -4.35% SPRO 2026-02-09 12:03:14 2.32 2.31 -4.35% SPRO 2026-02-09 13:02:22 2.33 2.31 -3.48% SPRO 2026-02-09 14:03:11 2.31 2.29 -4.35% SPRO 2026-02-09 15:02:21 2.36 2.35 -2.61% SPRO 2026-02-09 16:03:43 2.36 2.33 -2.61% SPRO 2026-02-09 17:02:15 2.86 2.31 -2.61% SPRO 2026-02-09 18:03:05 2.56 2.29 -2.48% 2026-02-10 SPRO 2026-02-10 05:02:28 3.68 0.97 -2.48% SPRO 2026-02-10 06:03:16 2.56 2.08 -2.48% SPRO 2026-02-10 08:03:17 2.48 2.08 -2.48% SPRO 2026-02-10 09:02:29 2.48 2.29 -2.48% SPRO 2026-02-10 11:02:20 2.38 2.35 0.00% SPRO 2026-02-10 12:03:09 2.37 2.35 0.83% SPRO 2026-02-10 13:02:35 2.38 2.37 1.24% SPRO 2026-02-10 14:11:51 2.38 2.37 0.83% SPRO 2026-02-10 15:02:40 2.36 2.35 0.00% SPRO 2026-02-10 16:03:15 2.37 2.35 0.83% SPRO 2026-02-10 17:02:23 2.48 2.33 0.00% SPRO 2026-02-10 18:03:59 2.48 2.29 0.00% SPRO 2026-02-10 21:07:54 0.00 0.00 0.00% 2026-02-11 SPRO 2026-02-11 05:02:20 2.48 0.99 0.00% SPRO 2026-02-11 06:03:13 2.48 2.10 0.00% SPRO 2026-02-11 08:03:10 2.48 2.16 0.00% SPRO 2026-02-11 09:43:11 Spero Therapeutics: Tebipenem's FDA Path Supports A Speculative Buy SPRO 2026-02-11 10:03:10 2.48 2.21 0.00% SPRO 2026-02-11 11:02:35 2.35 2.33 -0.85% SPRO 2026-02-11 12:03:12 2.34 2.31 -0.85% SPRO 2026-02-11 13:02:17 2.35 2.33 0.00% SPRO 2026-02-11 14:03:14 2.34 2.33 -0.85% SPRO 2026-02-11 15:02:17 2.37 2.35 0.85% SPRO 2026-02-11 16:03:18 2.38 2.37 1.27% SPRO 2026-02-11 17:02:17 2.48 2.31 0.85% SPRO 2026-02-11 21:03:56 0.00 0.00 0.85% 2026-02-12 SPRO 2026-02-12 05:02:28 3.79 0.99 0.85% SPRO 2026-02-12 06:03:29 2.93 2.08 0.85% SPRO 2026-02-12 07:02:31 2.37 2.10 0.85% SPRO 2026-02-12 08:03:16 2.37 2.29 0.85% SPRO 2026-02-12 09:02:35 2.43 2.17 0.00% SPRO 2026-02-12 11:02:49 2.37 2.35 -0.42% SPRO 2026-02-12 12:03:42 2.36 2.35 -0.42% SPRO 2026-02-12 13:08:17 2.35 2.33 -0.85% SPRO 2026-02-12 14:03:15 2.39 2.37 0.42% SPRO 2026-02-12 15:02:41 2.41 2.39 1.27% SPRO 2026-02-12 16:03:18 2.40 2.39 1.27% SPRO 2026-02-12 17:02:58 2.41 2.35 0.42% SPRO 2026-02-12 18:03:07 2.41 2.29 0.42% SPRO 2026-02-12 19:02:30 2.48 2.21 0.42% SPRO 2026-02-12 21:06:38 0.00 0.00 0.42% 2026-02-13 SPRO 2026-02-13 05:03:50 2.93 2.08 0.42% SPRO 2026-02-13 08:04:22 2.44 2.08 0.42% SPRO 2026-02-13 09:02:49 2.44 2.12 0.42% SPRO 2026-02-13 10:03:24 2.44 2.21 0.42% SPRO 2026-02-13 11:03:00 2.42 2.40 2.11% SPRO 2026-02-13 12:03:12 2.43 2.41 1.69% SPRO 2026-02-13 13:03:03 2.41 2.37 2.11% SPRO 2026-02-13 14:03:38 2.43 2.41 2.11% SPRO 2026-02-13 15:02:23 2.42 2.41 2.11% SPRO 2026-02-13 16:03:11 2.41 2.40 2.11% SPRO 2026-02-13 17:02:17 2.58 2.31 0.84% SPRO 2026-02-13 18:03:06 2.58 2.35 0.84% SPRO 2026-02-13 19:02:14 2.58 2.21 0.84% SPRO 2026-02-13 21:04:45 0.00 0.00 0.84% 2026-02-17 SPRO 2026-02-17 05:02:25 3.82 0.99 0.84% SPRO 2026-02-17 06:03:13 2.80 2.39 0.84% SPRO 2026-02-17 07:02:19 2.80 2.08 0.00% SPRO 2026-02-17 08:03:16 2.45 2.19 0.00% SPRO 2026-02-17 10:03:14 3.13 1.73 0.00% SPRO 2026-02-17 11:02:18 2.35 2.33 -2.10% SPRO 2026-02-17 12:03:17 2.36 2.35 -1.68% SPRO 2026-02-17 13:02:20 2.36 2.35 -1.26% SPRO 2026-02-17 14:03:12 2.32 2.31 -2.94% SPRO 2026-02-17 15:02:20 2.36 2.35 -1.26% SPRO 2026-02-17 16:03:15 2.35 2.33 -1.68% SPRO 2026-02-17 17:02:17 2.86 2.31 -1.68% SPRO 2026-02-17 18:03:08 2.65 2.04 -1.67% SPRO 2026-02-17 20:03:07 2.65 2.10 -1.67% SPRO 2026-02-17 21:05:59 0.00 0.00 -1.67% 2026-02-18 SPRO 2026-02-18 05:02:19 3.00 1.03 -1.67% SPRO 2026-02-18 06:03:14 2.80 2.14 -1.67% SPRO 2026-02-18 07:02:18 2.35 2.14 0.00% SPRO 2026-02-18 09:02:23 2.35 2.12 0.00% SPRO 2026-02-18 10:03:22 2.35 2.29 0.00% SPRO 2026-02-18 11:02:19 2.39 2.33 1.26% SPRO 2026-02-18 12:03:13 2.40 2.39 2.09% SPRO 2026-02-18 14:03:15 2.38 2.35 1.26% SPRO 2026-02-18 15:02:22 2.36 2.33 -0.42% SPRO 2026-02-18 16:03:24 2.33 2.31 -0.84% SPRO 2026-02-18 17:02:17 2.50 2.31 -0.84% SPRO 2026-02-18 18:03:11 2.65 2.31 -0.85% SPRO 2026-02-18 19:02:24 2.65 2.27 -0.85% SPRO 2026-02-18 21:06:48 0.00 0.00 -0.85% 2026-02-19 SPRO 2026-02-19 05:02:21 3.72 1.03 -0.85% SPRO 2026-02-19 06:03:16 2.40 2.33 -0.85% SPRO 2026-02-19 08:03:13 2.40 2.10 0.00% SPRO 2026-02-19 09:02:21 2.39 2.33 0.00% SPRO 2026-02-19 10:03:12 2.41 2.33 2.13% SPRO 2026-02-19 11:02:17 2.36 2.33 1.28% SPRO 2026-02-19 12:03:17 2.39 2.37 2.98% SPRO 2026-02-19 13:02:19 2.40 2.37 2.98% SPRO 2026-02-19 14:03:10 2.41 2.39 2.98% SPRO 2026-02-19 15:02:19 2.40 2.39 2.98% SPRO 2026-02-19 17:02:18 2.40 2.35 2.98% SPRO 2026-02-19 18:03:10 2.40 2.35 3.00% SPRO 2026-02-19 19:02:11 2.40 2.33 3.00% SPRO 2026-02-19 21:06:30 0.00 0.00 3.00% 2026-02-20 SPRO 2026-02-20 05:02:17 3.00 1.05 3.00% SPRO 2026-02-20 06:03:15 2.60 2.18 3.00% SPRO 2026-02-20 09:02:24 2.38 2.18 3.00% SPRO 2026-02-20 10:03:15 2.38 2.37 -0.86% SPRO 2026-02-20 11:02:19 2.37 2.35 -1.72% SPRO 2026-02-20 12:03:13 2.36 2.35 -1.72%