Upstream Bio Inc. (UPB)
Showing Closing Date Range from Sep 21 to Oct 19, 2026 compared to Aug 23 to Sep 20, 2026.
Compare Last 28 Days with Previous Period
Investor Relations:upstreambio.com
Current Period Close
$2.76
Sep 21, 2026 - Oct 19, 2026
Previous Period Close
$5.34
Aug 23, 2026 - Sep 20, 2026
Net Comparison Delta
$-2.58 (-48.31%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(17 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 16, 2026 | $2.76 | Sep 16, 2026 | $5.33 | -48.22% |
| Oct 15, 2026 | $3.37 | Sep 15, 2026 | $5.48 | -38.50% |
| Oct 14, 2026 | $3.42 | Sep 14, 2026 | $5.81 | -41.14% |
| Oct 13, 2026 | $3.55 | Sep 11, 2026 | $5.73 | -38.05% |
| Oct 12, 2026 | $4.17 | Sep 10, 2026 | $5.75 | -27.48% |
| Oct 09, 2026 | $4.70 | Sep 09, 2026 | $5.96 | -21.14% |
| Oct 08, 2026 | $4.55 | Sep 08, 2026 | $6.19 | -26.49% |
| Oct 07, 2026 | $4.61 | Sep 04, 2026 | $6.01 | -23.29% |
| Oct 06, 2026 | $4.59 | Sep 03, 2026 | $6.08 | -24.51% |
| Oct 05, 2026 | $4.85 | Sep 02, 2026 | $6.48 | -25.15% |
| Oct 02, 2026 | $5.04 | Sep 01, 2026 | $6.55 | -23.05% |
| Sep 28, 2026 | $5.34 | Aug 31, 2026 | $6.62 | -19.34% |
| Sep 25, 2026 | $5.36 | Aug 28, 2026 | $6.69 | -19.88% |
| Sep 24, 2026 | $5.17 | Aug 27, 2026 | $6.79 | -23.86% |
| Sep 23, 2026 | $5.19 | Aug 26, 2026 | $7.13 | -27.21% |
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