Stock listing
NASDAQ:SPTX Seaport Therapeutics, Inc. Stock
Home listing (NASDAQ) of Seaport Therapeutics, Inc.
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Share price · NASDAQ:SPTX
$19.60 USD -1.50 (-7.1%)
Close on Oct 30, 2026
- Day range
- $19.00 – $21.16 USDOct 30, 2026
- Volume
- 549,189 sharesOct 30, 2026
- Market cap
- $1.05B USDAt the close on Oct 30, 2026 · price × 53.53M shares outstanding
- Traded on an average day
- $4.36M USDMedian day 145,505 shares · last 3 months, Jul 30, 2026 – Oct 30, 2026
Prices by listing
| Listing | Last | Change | Volume | Open | High | Low | Previous close | Price from |
|---|---|---|---|---|---|---|---|---|
| NASDAQ:SPTX · Home | $19.60 USD | -1.50 (-7.1%) | 549,189 | $20.96 | $21.16 | $19.00 | $21.10 | Close on Oct 30, 2026 |
Daily closes
Last 3 months, Jul 30, 2026 – Oct 30, 2026 · NASDAQ:SPTX · USD, adjusted for splits
| Day | Close | Change | % | Open | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| $19.60 | -1.50 | -7.1% | $20.96 | $21.16 | $19.00 | 549,189 | |
| $21.10 | +0.72 | +3.5% | $20.71 | $22.09 | $20.48 | 272,147 | |
| $20.38 | -0.90 | -4.2% | $20.81 | $21.02 | $19.53 | 355,270 | |
| $21.28 | +0.45 | +2.2% | $21.00 | $22.05 | $20.73 | 219,054 | |
| $20.83 | +0.22 | +1.1% | $20.76 | $21.69 | $20.34 | 124,685 | |
| $20.61 | -0.15 | -0.7% | $20.72 | $20.89 | $19.99 | 164,566 | |
| $20.76 | +1.03 | +5.2% | $19.74 | $21.07 | $19.74 | 131,421 | |
| $19.73 | +0.45 | +2.3% | $19.27 | $20.13 | $18.00 | 134,583 | |
| $19.28 | +1.49 | +8.4% | $17.98 | $19.63 | $17.56 | 145,273 | |
| $17.79 | -0.04 | -0.2% | $17.83 | $18.12 | $17.47 | 145,736 | |
| $17.83 | +0.23 | +1.3% | $17.63 | $18.00 | $17.14 | 184,539 | |
| $17.60 | +0.92 | +5.5% | $16.82 | $17.89 | $16.61 | 164,911 | |
| $16.68 | +0.60 | +3.7% | $15.98 | $16.97 | $15.79 | 208,623 | |
| $16.08 | -1.07 | -6.2% | $17.08 | $17.62 | $16.03 | 227,202 | |
| $17.15 | -1.00 | -5.5% | $18.14 | $18.14 | $17.04 | 126,005 | |
| $18.15 | +0.24 | +1.3% | $18.00 | $18.79 | $17.89 | 171,206 | |
| $17.91 | -0.02 | -0.1% | $17.67 | $18.46 | $17.67 | 177,595 | |
| $17.93 | +0.56 | +3.2% | $17.28 | $18.29 | $17.07 | 249,080 | |
| $17.37 | -1.13 | -6.1% | $18.50 | $19.05 | $17.18 | 243,005 | |
| $18.50 | +0.08 | +0.4% | $18.42 | $18.90 | $17.52 | 172,570 | |
| $18.42 | -0.53 | -2.8% | $19.16 | $19.16 | $17.85 | 258,702 | |
| $18.95 | -1.22 | -6.0% | $20.12 | $20.71 | $18.37 | 330,192 | |
| $20.17 | +1.48 | +7.9% | $18.85 | $20.75 | $18.45 | 488,678 | |
| $18.69 | -0.95 | -4.8% | $19.46 | $19.80 | $18.57 | 288,869 | |
| $19.64 | -1.88 | -8.7% | $21.31 | $21.99 | $19.22 | 284,477 | |
| $21.52 | +0.40 | +1.9% | $22.20 | $22.44 | $21.45 | 192,796 | |
| $21.12 | -0.17 | -0.8% | $21.08 | $21.37 | $19.93 | 105,737 | |
| $21.29 | -1.10 | -4.9% | $22.12 | $23.07 | $21.03 | 179,279 | |
| $22.39 | +1.27 | +6.0% | $21.20 | $22.67 | $21.20 | 146,461 | |
| $21.12 | -0.27 | -1.3% | $21.46 | $21.94 | $20.28 | 234,265 | |
| $21.39 | -0.43 | -2.0% | $21.88 | $23.10 | $21.29 | 2,178,493 | |
| $21.82 | -0.32 | -1.4% | $22.46 | $23.14 | $21.10 | 205,613 | |
| $22.14 | -0.82 | -3.6% | $23.01 | $24.61 | $21.98 | 235,897 | |
| $22.96 | -1.74 | -7.0% | $24.56 | $24.95 | $22.63 | 158,970 | |
| $24.70 | +1.36 | +5.8% | $23.33 | $25.37 | $23.33 | 174,188 | |
| $23.34 | +0.06 | +0.3% | $23.39 | $24.36 | $23.00 | 134,166 | |
| $23.28 | +1.53 | +7.0% | $21.58 | $23.28 | $21.58 | 144,714 | |
| $21.75 | -2.31 | -9.6% | $24.14 | $25.52 | $21.73 | 316,780 | |
| $24.06 | -0.80 | -3.2% | $24.89 | $25.43 | $23.77 | 141,709 | |
| $24.86 | +0.57 | +2.3% | $24.03 | $25.00 | $23.63 | 104,337 | |
| $24.29 | -0.62 | -2.5% | $24.80 | $26.01 | $23.58 | 86,222 | |
| $24.91 | +1.30 | +5.5% | $23.66 | $25.21 | $23.65 | 156,427 | |
| $23.61 | -0.07 | -0.3% | $23.68 | $24.20 | $23.24 | 122,756 | |
| $23.68 | -0.36 | -1.5% | $24.14 | $26.47 | $23.01 | 117,846 | |
| $24.04 | -2.21 | -8.4% | $26.09 | $26.87 | $24.04 | 144,826 | |
| $26.25 | -1.59 | -5.7% | $27.84 | $28.38 | $26.06 | 128,656 | |
| $27.84 | +3.01 | +12.1% | $25.11 | $28.37 | $24.42 | 135,682 | |
| $24.83 | +0.75 | +3.1% | $24.25 | $25.42 | $24.25 | 85,792 | |
| $24.08 | -0.23 | -0.9% | $24.40 | $26.47 | $23.46 | 110,488 | |
| $24.31 | +0.275 | +1.1% | $23.81 | $25.12 | $23.78 | 83,149 | |
| $24.04 | -0.385 | -1.6% | $24.12 | $25.45 | $23.53 | 86,323 | |
| $24.42 | +0.45 | +1.9% | $24.00 | $26.32 | $23.66 | 240,946 | |
| $23.97 | -0.43 | -1.8% | $24.15 | $24.53 | $23.24 | 120,486 | |
| $24.40 | +0.18 | +0.7% | $24.41 | $25.07 | $23.52 | 98,614 | |
| $24.22 | +0.51 | +2.2% | $23.79 | $24.33 | $23.39 | 121,146 | |
| $23.71 | -0.09 | -0.4% | $24.24 | $24.54 | $23.15 | 121,799 | |
| $23.80 | +0.44 | +1.9% | $23.77 | $24.65 | $23.04 | 246,294 | |
| $23.36 | +0.34 | +1.5% | $23.40 | $23.85 | $23.04 | 103,463 | |
| $23.02 | -0.60 | -2.5% | $23.89 | $24.20 | $22.80 | 77,063 | |
| $23.62 | +0.53 | +2.3% | $23.26 | $24.48 | $23.26 | 112,372 | |
| $23.09 | +0.75 | +3.4% | $22.01 | $23.34 | $22.00 | 106,561 | |
| $22.34 | +0.91 | +4.2% | $21.35 | $22.50 | $21.35 | 119,426 | |
| $21.43 | +0.78 | +3.8% | $20.34 | $21.86 | $20.34 | 89,903 | |
| $20.65 | +0.19 | +0.9% | $19.54 | $21.10 | $19.54 | 139,526 | |
| $20.46 | +0.14 | +0.7% | $20.65 | $21.00 | $19.71 | 115,650 | |
| $20.32 | +0.58 | +2.9% | $19.89 | $20.97 | $19.80 | 102,249 |
- Ticker
- NASDAQ:SPTX
- Asset type
- Stock
- Exchange
- NASDAQ
- Currency
- USD
What changed lately
Latest news release · Oct 28, 2026
Seaport Therapeutics to Present at Stifel 2026 Healthcare Conference
Latest deck · October 2026
Investor Presentation (October 2026)
Investor deck · 40 slides
Latest news
Seaport Therapeutics to Present at Stifel 2026 Healthcare Conference
Oct 28, 2026
Closed $20.38 (-4.2%) on Oct 28, 2026
PureTech Founded Entity Seaport Therapeutics Presents Additional Pharmacokinetic Data from Phase 1 Clinical Trial of GlyphAgo™ at the 39th European College of Neuropsychopharmacology (ECNP) Congress
Oct 9, 2026
Closed $18.15 (+1.3%) on Oct 9, 2026
PureTech Founded Entity Seaport Therapeutics Announces First Patient Dosed in Phase 2a Clinical Trial Evaluating GlyphAgo™ in Patients with Generalized Anxiety Disorder and Sleep Disturbance
Oct 7, 2026
Closed $17.93 (+3.2%) on Oct 7, 2026
Seaport Therapeutics Announces First Patient Dosed in Phase 2a Clinical Trial Evaluating GlyphAgoTM in Patients with Generalized Anxiety Disorder and Sleep Disturbance
Oct 7, 2026
Closed $17.93 (+3.2%) on Oct 7, 2026
Seaport Therapeutics to Participate in September Investor Conferences
Sep 14, 2026
Closed $24.70 (+5.8%) on Sep 14, 2026
Seaport Therapeutics Reports Positive Topline Results from Phase 1 Driving Simulation Trial of GlyphAllo™ in Healthy Volunteers
Sep 9, 2026
Closed $21.75 (-9.6%) on Sep 9, 2026
Seaport Therapeutics Reports Second Quarter 2026 Financial Results and Highlights Recent Corporate and Clinical Progress
Aug 3, 2026
Closed $20.65 (+0.9%) on Aug 3, 2026
PureTech Founded Entity Seaport Therapeutics Reports Positive Multiple-Ascending Dose Data from Phase 1 Proof-of-Concept Trial of GlyphAgo™ in Healthy Volunteers
Jun 9, 2026
Closed $17.66 (+9.0%) on Jun 9, 2026
Seaport Therapeutics Reports First Quarter 2026 Financial Results and Highlights Recent Corporate and Clinical Progress
Jun 8, 2026
Closed $16.20 (-1.5%) on Jun 8, 2026
Seaport Therapeutics to Participate in Two Upcoming Investor Conferences
Jun 1, 2026
Closed $17.13 (-5.8%) on Jun 1, 2026
Decks
Investor Presentation (October 2026)
Investor deck · 40 slides · October 2026
Investor Presentation (September 2026)
Investor deck · 40 slides · September 2026
Investor Presentation (September 2026)
Investor deck · 39 slides · September 2026
Investor Presentation (August 2026)
Investor deck · 38 slides · August 2026
Seaport Therapeutics, Inc. on 6ix
- News releases
- 13 in the last 12 months · 13 in all · newest Oct 28, 2026 · oldest 2026
- Decks
- 5 decks · latest October 2026
Where Seaport Therapeutics, Inc. is listed
| Listing | Exchange | Country | Currency |
|---|---|---|---|
| NASDAQ:SPTX · Home listing · This page | NASDAQ | United States | USD |
| BOATS:SPTX | BOATS | United States | USD |
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