Seaport Therapeutics Stock Price History
NASDAQ: SPTXHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
SPTX price history at a glance
The price history for Seaport Therapeutics (SPTX) on this page begins on April 27, 2026, when the stock closed at $19.84; it most recently closed at $18.15 on October 5, 2026. The highest price in this record is $28.38, reached on August 24, 2026; the latest close is 36.0% below that peak. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2026
- $28.38
- Date of high
- Aug 24, 2026
- Low since 2026
- $14.85
- Date of low
- May 4, 2026
- 52-week high
- $28.38
- 52-week low
- $14.85
- IPO year
- 2026
- Last close
- $18.15
SPTX returns
1 week
-1.47%
1 month
-16.55%
3 months
-15.89%
SPTX price return, excluding dividends.
SPTX daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 17.99 | 18.79 | 17.89 | 18.15 | +1.34% | |
| 17.67 | 18.46 | 17.67 | 17.91 | -0.11% | |
| 17.28 | 18.29 | 17.07 | 17.93 | +3.22% | |
| 18.50 | 19.05 | 17.18 | 17.37 | -6.11% | |
| 18.42 | 18.90 | 17.52 | 18.50 | +0.43% | |
| 19.16 | 19.16 | 17.85 | 18.42 | -2.80% | |
| 20.12 | 20.71 | 18.37 | 18.95 | -6.05% | |
| 18.85 | 20.75 | 18.45 | 20.17 | +7.92% | |
| 19.46 | 19.80 | 18.57 | 18.69 | -4.84% | |
| 21.31 | 21.99 | 19.22 | 19.64 | -8.74% | |
| 22.20 | 22.44 | 21.45 | 21.52 | +1.89% | |
| 21.08 | 21.37 | 19.93 | 21.12 | -0.80% | |
| 22.12 | 23.07 | 21.03 | 21.29 | -4.91% | |
| 21.20 | 22.67 | 21.20 | 22.39 | +6.01% | |
| 21.46 | 21.94 | 20.28 | 21.12 | -1.26% | |
| 21.88 | 23.10 | 21.29 | 21.39 | -1.97% | |
| 22.46 | 23.14 | 21.10 | 21.82 | -1.45% | |
| 23.01 | 24.61 | 21.98 | 22.14 | -3.57% | |
| 24.56 | 24.95 | 22.63 | 22.96 | -7.04% | |
| 23.33 | 25.37 | 23.33 | 24.70 | +5.83% | |
| 23.39 | 24.36 | 23.00 | 23.34 | +0.26% | |
| 21.58 | 23.28 | 21.58 | 23.28 | +7.03% | |
| 24.14 | 25.52 | 21.73 | 21.75 | -9.60% | |
| 24.89 | 25.43 | 23.77 | 24.06 | -3.22% | |
| 24.03 | 25.00 | 23.63 | 24.86 | +2.35% | |
| 24.80 | 26.01 | 23.58 | 24.29 | -2.49% | |
| 23.66 | 25.21 | 23.65 | 24.91 | +5.51% | |
| 23.68 | 24.20 | 23.24 | 23.61 | -0.30% | |
| 24.14 | 26.47 | 23.01 | 23.68 | -1.50% | |
| 26.09 | 26.87 | 24.04 | 24.04 | -8.42% | |
| 27.84 | 28.38 | 26.06 | 26.25 | -5.71% | |
| 25.11 | 28.37 | 24.42 | 27.84 | +12.12% | |
| 24.25 | 25.42 | 24.25 | 24.83 | +3.11% | |
| 24.40 | 26.47 | 23.46 | 24.08 | -0.95% | |
| 23.81 | 25.12 | 23.78 | 24.31 | +1.12% | |
| 24.12 | 25.45 | 23.53 | 24.04 | -1.56% | |
| 24.00 | 26.32 | 23.66 | 24.42 | +1.88% | |
| 24.15 | 24.53 | 23.24 | 23.97 | -1.76% | |
| 24.41 | 25.07 | 23.52 | 24.40 | +0.74% | |
| 23.79 | 24.33 | 23.39 | 24.22 | +2.15% | |
| 24.24 | 24.54 | 23.15 | 23.71 | -0.38% | |
| 23.77 | 24.65 | 23.04 | 23.80 | +1.88% | |
| 23.40 | 23.85 | 23.04 | 23.36 | +1.48% | |
| 23.89 | 24.20 | 22.80 | 23.02 | -2.54% | |
| 23.26 | 24.48 | 23.26 | 23.62 | +2.30% | |
| 22.01 | 23.34 | 22.00 | 23.09 | +3.36% | |
| 21.35 | 22.50 | 21.35 | 22.34 | +4.25% | |
| 20.34 | 21.86 | 20.34 | 21.43 | +3.78% | |
| 19.54 | 21.10 | 19.54 | 20.65 | +0.93% | |
| 20.65 | 21.00 | 19.71 | 20.46 | +0.69% | |
| 19.89 | 20.97 | 19.80 | 20.32 | +2.94% | |
| 20.18 | 20.57 | 19.22 | 19.74 | -0.80% | |
| 20.65 | 20.65 | 19.58 | 19.90 | -3.12% | |
| 21.81 | 22.17 | 20.35 | 20.54 | -2.65% | |
| 22.06 | 22.16 | 20.98 | 21.10 | -3.83% | |
| 21.31 | 22.53 | 21.16 | 21.94 | +3.00% | |
| 21.00 | 21.84 | 20.71 | 21.30 | +1.43% | |
| 20.76 | 21.46 | 20.50 | 21.00 | +2.19% | |
| 20.93 | 22.05 | 19.92 | 20.55 | -1.44% | |
| 19.09 | 21.08 | 19.06 | 20.85 | +6.81% | |
| 20.25 | 20.70 | 19.16 | 19.52 | -4.55% | |
| 21.05 | 21.73 | 20.07 | 20.45 | +0.05% | |
| 20.10 | 20.70 | 19.21 | 20.44 | +1.69% | |
| 21.30 | 21.56 | 20.06 | 20.10 | -6.86% | |
| 20.57 | 21.75 | 19.38 | 21.58 | +5.22% | |
| 21.26 | 21.42 | 19.46 | 20.51 | -3.53% | |
| 18.17 | 21.59 | 17.89 | 21.26 | +16.62% | |
| 19.22 | 19.90 | 17.92 | 18.23 | -5.89% | |
| 20.60 | 21.55 | 19.10 | 19.37 | -5.83% | |
| 21.39 | 21.87 | 19.42 | 20.57 | -4.10% | |
| 21.75 | 22.07 | 21.13 | 21.45 | -1.24% | |
| 22.47 | 22.98 | 21.04 | 21.72 | -3.55% | |
| 21.12 | 22.65 | 20.86 | 22.52 | +5.23% | |
| 19.44 | 21.50 | 19.24 | 21.40 | +10.54% | |
| 19.54 | 19.72 | 18.47 | 19.36 | +0.26% | |
| 19.62 | 20.04 | 18.73 | 19.31 | +1.79% | |
| 17.74 | 19.19 | 17.74 | 18.97 | +5.45% | |
| 17.97 | 18.50 | 17.59 | 17.99 | -0.99% | |
| 17.44 | 18.28 | 16.91 | 18.17 | +6.26% | |
| 18.07 | 18.43 | 16.76 | 17.10 | -4.84% | |
| 17.41 | 18.19 | 17.31 | 17.97 | +3.04% | |
| 17.87 | 18.45 | 17.35 | 17.44 | -3.11% | |
| 17.78 | 18.50 | 17.51 | 18.00 | +1.58% | |
| 17.33 | 18.26 | 16.15 | 17.72 | +3.50% | |
| 17.87 | 18.78 | 16.51 | 17.12 | -3.06% | |
| 16.00 | 18.34 | 16.00 | 17.66 | +9.01% | |
| 16.51 | 17.11 | 16.12 | 16.20 | -1.46% | |
| 17.71 | 18.31 | 16.35 | 16.44 | -8.05% | |
| 17.30 | 18.28 | 17.30 | 17.88 | +3.77% | |
| 17.06 | 17.68 | 16.59 | 17.23 | +0.12% | |
| 17.00 | 17.65 | 16.69 | 17.21 | +0.47% | |
| 18.33 | 18.60 | 17.01 | 17.13 | -5.83% | |
| 18.61 | 18.68 | 17.84 | 18.19 | -3.24% | |
| 17.88 | 19.30 | 17.88 | 18.80 | +4.16% | |
| 18.00 | 18.24 | 17.80 | 18.05 | +0.22% | |
| 17.72 | 18.25 | 17.32 | 18.01 | +2.91% | |
| 17.19 | 17.69 | 16.53 | 17.50 | +1.80% | |
| 16.00 | 17.52 | 15.67 | 17.19 | +8.94% | |
| 16.34 | 16.76 | 15.52 | 15.78 | +0.77% | |
| 15.67 | 16.26 | 15.01 | 15.66 | -0.51% | |
| 16.85 | 16.85 | 15.00 | 15.74 | -6.37% | |
| 16.77 | 17.23 | 16.19 | 16.81 | -0.77% | |
| 16.50 | 17.36 | 16.10 | 16.94 | +2.67% | |
| 16.10 | 16.70 | 15.57 | 16.50 | +3.45% | |
| 15.39 | 16.05 | 15.30 | 15.95 | +4.59% | |
| 16.00 | 16.44 | 14.94 | 15.25 | -4.98% | |
| 15.75 | 16.24 | 15.44 | 16.05 | +3.55% | |
| 16.05 | 16.08 | 14.85 | 15.50 | -3.13% | |
| 16.01 | 16.46 | 15.35 | 16.00 | 0.00% | |
| 17.35 | 17.86 | 15.21 | 16.00 | -5.88% | |
| 19.17 | 19.17 | 16.90 | 17.00 | -14.31% | |
| 21.00 | 23.00 | 19.50 | 19.84 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the SPTX chart for longer ranges.