Spero Therapeutics, Inc. (SPRO) NASDAQ
Currency In USD
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SPRO Historical Return
If you invested $1000 in Spero Therapeutics, Inc. (SPRO) since IPO date, it would be worth $98.26 as of September 12, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $60.75, while $1000 invested 1 year ago would be worth $594.74. This corresponds to total returns of -90.17%, -93.92%, -40.53%, respectively, with annualized returns of -23.03%, -42.89%, -40.53%.
Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.
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SPRO Historical Data
Date Range:
| Date | Open | Close | Adj Close | High | Low | Volume |
|---|---|---|---|---|---|---|
| September 11, 2026 | 1.14 | 1.13 | 1.13 | 1.15 | 1.13 | 308,629 |
| September 10, 2026 | 1.18 | 1.12 | 1.12 | 1.18 | 1.12 | 569,283 |
| September 09, 2026 | 1.2 | 1.17 | 1.17 | 1.21 | 1.17 | 367,029 |
| September 08, 2026 | 1.21 | 1.19 | 1.19 | 1.22 | 1.19 | 348,124 |
| September 04, 2026 | 1.2 | 1.21 | 1.21 | 1.22 | 1.19 | 362,871 |
| September 03, 2026 | 1.22 | 1.22 | 1.22 | 1.23 | 1.22 | 0 |
| September 02, 2026 | 1.2 | 1.22 | 1.22 | 1.24 | 1.2 | 169,512 |
| September 01, 2026 | 1.22 | 1.2 | 1.2 | 1.22 | 1.18 | 382,297 |
| August 31, 2026 | 1.2 | 1.22 | 1.22 | 1.23 | 1.2 | 330,164 |
| August 28, 2026 | 1.21 | 1.2 | 1.2 | 1.22 | 1.18 | 312,272 |
| August 27, 2026 | 1.22 | 1.21 | 1.21 | 1.23 | 1.18 | 537,656 |
| August 26, 2026 | 1.22 | 1.22 | 1.22 | 1.23 | 1.2 | 154,663 |
| August 25, 2026 | 1.23 | 1.23 | 1.23 | 1.26 | 1.2 | 645,513 |
| August 24, 2026 | 1.22 | 1.22 | 1.22 | 1.24 | 1.2 | 367,271 |
| August 21, 2026 | 1.22 | 1.22 | 1.22 | 1.25 | 1.21 | 359,138 |
| August 20, 2026 | 1.22 | 1.21 | 1.21 | 1.27 | 1.2 | 557,879 |
| August 19, 2026 | 1.23 | 1.23 | 1.23 | 1.24 | 1.19 | 0 |
| August 18, 2026 | 1.2 | 1.2 | 1.2 | 1.2 | 1.18 | 0 |
| August 17, 2026 | 1.21 | 1.19 | 1.19 | 1.24 | 1.19 | 299,010 |
| August 14, 2026 | 1.26 | 1.23 | 1.23 | 1.26 | 1.19 | 744,543 |
| August 13, 2026 | 1.19 | 1.24 | 1.24 | 1.3 | 1.19 | 0 |
| August 12, 2026 | 1.19 | 1.19 | 1.19 | 1.19 | 1.19 | 0 |
| August 11, 2026 | 1.24 | 1.23 | 1.23 | 1.24 | 1.21 | 0 |
| August 10, 2026 | 1.25 | 1.23 | 1.23 | 1.28 | 1.23 | 350,798 |
| August 07, 2026 | 1.27 | 1.26 | 1.26 | 1.28 | 1.24 | 0 |
| August 06, 2026 | 1.26 | 1.27 | 1.27 | 1.27 | 1.23 | 972,468 |
| August 05, 2026 | 1.25 | 1.26 | 1.26 | 1.28 | 1.21 | 574,336 |
| August 04, 2026 | 1.15 | 1.23 | 1.23 | 1.25 | 1.15 | 751,966 |
| August 03, 2026 | 1.19 | 1.15 | 1.15 | 1.22 | 1.13 | 1.37M |
| July 31, 2026 | 1.2 | 1.17 | 1.17 | 1.21 | 1.17 | 811,649 |
| July 30, 2026 | 1.2 | 1.2 | 1.2 | 1.22 | 1.18 | 486,387 |
| July 29, 2026 | 1.2 | 1.19 | 1.19 | 1.21 | 1.16 | 1.06M |
| July 28, 2026 | 1.18 | 1.2 | 1.2 | 1.28 | 1.15 | 1.6M |
| July 27, 2026 | 1.2 | 1.18 | 1.18 | 1.23 | 1.16 | 1.35M |
| July 23, 2026 | 1.28 | 1.16 | 1.16 | 1.28 | 1.1 | 3.72M |
| July 22, 2026 | 1.38 | 1.27 | 1.27 | 1.41 | 1.25 | 1.99M |
| July 21, 2026 | 1.39 | 1.38 | 1.38 | 1.44 | 1.37 | 2.17M |
| July 20, 2026 | 1.57 | 1.44 | 1.44 | 1.57 | 1.41 | 1.71M |
| July 17, 2026 | 1.52 | 1.58 | 1.58 | 1.64 | 1.5 | 1.25M |
| July 16, 2026 | 1.68 | 1.57 | 1.57 | 1.69 | 1.52 | 2.61M |
| July 15, 2026 | 1.71 | 1.7 | 1.7 | 1.71 | 1.63 | 1.41M |
| July 14, 2026 | 2.17 | 1.7 | 1.7 | 2.34 | 1.67 | 11.21M |
| July 13, 2026 | 2.11 | 2.18 | 2.18 | 2.19 | 2.07 | 703,476 |
| July 10, 2026 | 2.12 | 2.1 | 2.1 | 2.16 | 2.05 | 480,934 |
| July 09, 2026 | 2.19 | 2.12 | 2.12 | 2.19 | 2.12 | 369,166 |
| July 08, 2026 | 2.14 | 2.17 | 2.17 | 2.23 | 2.13 | 303,907 |
| July 07, 2026 | 2.16 | 2.16 | 2.16 | 2.19 | 2.12 | 877,693 |
| July 06, 2026 | 2.17 | 2.19 | 2.19 | 2.21 | 2.15 | 355,231 |
| July 02, 2026 | 2.23 | 2.2 | 2.2 | 2.28 | 2.15 | 629,507 |
| July 01, 2026 | 2.21 | 2.22 | 2.22 | 2.27 | 2.21 | 397,474 |
| June 30, 2026 | 2.26 | 2.21 | 2.21 | 2.29 | 2.2 | 433,558 |
| June 29, 2026 | 2.26 | 2.26 | 2.26 | 2.33 | 2.25 | 517,549 |
| June 26, 2026 | 2.03 | 2.26 | 2.26 | 2.33 | 2.01 | 2.22M |
| June 25, 2026 | 2.12 | 2.02 | 2.02 | 2.13 | 2.02 | 1.14M |
| June 24, 2026 | 2.15 | 2.1 | 2.1 | 2.23 | 2.1 | 887,736 |
| June 23, 2026 | 2.16 | 2.15 | 2.15 | 2.23 | 2.15 | 605,520 |
| June 22, 2026 | 2.28 | 2.21 | 2.21 | 2.36 | 2.16 | 2.23M |
| June 18, 2026 | 2.51 | 2.28 | 2.28 | 2.51 | 2.15 | 7.15M |
| June 17, 2026 | 2.87 | 2.11 | 2.11 | 3.05 | 1.95 | 11.04M |
| June 16, 2026 | 2.94 | 2.77 | 2.77 | 2.98 | 2.75 | 1.43M |
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