Spero Therapeutics Inc. (SPRO)
Showing Closing Date Range from Nov 9, 2025 to Nov 9, 2026 compared to Nov 8, 2024 to Nov 8, 2025.
Compare Last 12 Months with Previous Period
Investor Relations:investors.sperotherapeutics.com
Current Period Close
$1.07
Nov 09, 2025 - Nov 09, 2026
Previous Period Close
$2.46
Nov 08, 2024 - Nov 08, 2025
Net Comparison Delta
$-1.39 (-56.50%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(247 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Nov 09, 2026 | $1.07 | Nov 04, 2025 | $2.35 | -54.47% |
| Nov 06, 2026 | $1.03 | Nov 03, 2025 | $2.38 | -56.72% |
| Nov 05, 2026 | $1.02 | Oct 31, 2025 | $2.43 | -58.02% |
| Nov 04, 2026 | $1.07 | Oct 30, 2025 | $2.36 | -54.66% |
| Nov 03, 2026 | $1.04 | Oct 29, 2025 | $2.33 | -55.36% |
| Nov 02, 2026 | $1.04 | Oct 28, 2025 | $2.38 | -56.30% |
| Oct 30, 2026 | $1.06 | Oct 27, 2025 | $2.29 | -53.71% |
| Oct 29, 2026 | $1.11 | Oct 24, 2025 | $2.21 | -49.77% |
| Oct 28, 2026 | $1.17 | Oct 23, 2025 | $2.20 | -46.82% |
| Oct 27, 2026 | $1.14 | Oct 22, 2025 | $2.25 | -49.33% |
| Oct 26, 2026 | $1.07 | Oct 21, 2025 | $2.37 | -54.85% |
| Oct 23, 2026 | $1.11 | Oct 20, 2025 | $2.29 | -51.53% |
| Oct 22, 2026 | $1.13 | Oct 17, 2025 | $2.21 | -48.87% |
| Oct 21, 2026 | $1.17 | Oct 16, 2025 | $2.35 | -50.21% |
| Oct 20, 2026 | $1.22 | Oct 15, 2025 | $2.49 | -51.00% |
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