Loading the section…
The price of Seaport Therapeutics, Inc. (SPTX) on October 9, 2026 is 18.15 USD, +1.34% on the day. Over 52 weeks the stock traded between 14.85 USD and 28.38 USD; the price now sits 24% of the way up that range.
Closing prices for 9 October 2026
Next earnings report: 2 November 2026 · Earnings calendar
Change over the period shown (line colour): −8.52 %
The series is stated in the current share scale after splits; dividends are not included in the price
Seaport Therapeutics, Inc. trades on Nasdaq under the ticker SPTX. The trading history on this page starts on 1 May 2026.
Over the past 52 weeks SPTX has traded between 14.85 $ and 28.38 $. As of 9 October 2026 the price stood 24.39 % of the way from the 52-week low to the high.
Price to book is 2.3. Calculated from reports for the period ending 27 July 2026.
| Date | Open | High | Low | Close | Volume, shares |
|---|---|---|---|---|---|
| 9 October 2026 | 18.00 | 18.79 | 17.89 | 18.15 | 171,200 |
| 8 October 2026 | 17.67 | 18.46 | 17.67 | 17.91 | 177,600 |
| 7 October 2026 | 17.28 | 18.29 | 17.07 | 17.93 | 249,100 |
| 6 October 2026 | 18.50 | 19.05 |
Based on reports through 27 July 2026
There is no company information yet.
| 17.18 |
| 17.37 |
| 243,000 |
| 5 October 2026 | 18.42 | 18.90 | 17.52 | 18.50 | 172,500 |
| 2 October 2026 | 19.16 | 19.16 | 17.85 | 18.42 | 258,700 |
| 1 October 2026 | 20.12 | 20.71 | 18.37 | 18.95 | 330,200 |
| 30 September 2026 | 18.85 | 20.75 | 18.45 | 20.17 | 488,700 |
| 29 September 2026 | 19.46 | 19.80 | 18.57 | 18.69 | 288,900 |
| 28 September 2026 | 21.31 | 21.99 | 19.22 | 19.64 | 284,500 |
| 25 September 2026 | 22.20 | 22.44 | 21.45 | 21.52 | 192,800 |
| 24 September 2026 | 21.08 | 21.37 | 19.93 | 21.12 | 105,700 |
| 23 September 2026 | 22.12 | 23.07 | 21.03 | 21.29 | 179,300 |
| 22 September 2026 | 21.20 | 22.67 | 21.20 | 22.39 | 146,500 |
| 21 September 2026 | 21.46 | 21.94 | 20.28 | 21.12 | 234,300 |
| 18 September 2026 | 21.88 | 23.10 | 21.29 | 21.39 | 2M |
| 17 September 2026 | 22.46 | 23.14 | 21.10 | 21.82 | 205,600 |
| 16 September 2026 | 23.01 | 24.61 | 21.98 | 22.14 | 235,900 |
| 15 September 2026 | 24.56 | 24.95 | 22.63 | 22.96 | 158,900 |
| 14 September 2026 | 23.33 | 25.37 | 23.33 | 24.70 | 174,200 |