Seaport Therapeutics (SPTX) Stock Price, News & Analysis
What Changed
Price Move History
- Daily moves over 5%
- 25 97 sessions, May 1, 2026 to September 18, 2026
- Largest daily move
- +16.6% close of July 8, 2026
Company Description
Seaport Therapeutics (NASDAQ: SPTX) is classified in the biotechnology industry within the Healthcare sector and carries a market capitalization of $1.1B.
SPTX has declined 10.8% over the past month. The last closing price was $21.39.
This page collects what Stock Titan holds for SPTX, including price data, latest news, SEC filings, insider trading activity, financial highlights, upcoming events, and short interest trends.
Stock Performance
Seaport Therapeutics (SPTX) closed at $21.39 on September 18, 2026. Over the past month, the price has lost 10.8%.
SPTX Metrics & Rankings
Price returns through September 18, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Seaport Therapeutics has 10 recent news articles, with the latest published 6 days ago. Of the recent coverage, 3 articles coincided with positive price movement and 6 with negative movement. Key topics include clinical trial, earnings, conferences, IPO, offering. View all SPTX news →
SEC Filings
Seaport Therapeutics has filed 10 recent SEC filings, including 4 Form SCHEDULE 13G, 2 Form 10-Q, 2 Form 8-K, 1 Form 4. The most recent filing was submitted on August 14, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all SPTX SEC filings →
Insider Radar
Insider buying activity at Seaport Therapeutics over the past 90 days may reflect management confidence in the company's direction. Institutional investors and analysts often monitor insider purchases as a potential bullish indicator for the stock.
Financial Highlights
Upcoming Events
BUOY-1 topline data
BUOY-1 topline readout
BUOY-1 topline results
Topline data expected
Seaport Therapeutics has 4 upcoming scheduled events. The next event, "BUOY-1 topline data", is scheduled for January 1, 2027 (in 102 days). Investors can track these dates to stay informed about potential catalysts that may affect the SPTX stock price.
Short Interest History
Short interest in Seaport Therapeutics (SPTX) currently stands at 3.2 million shares, up 4.6% from the previous reporting period, representing 11.0% of the float. Since May 2026, short interest has increased by 116.0%. This moderate level of short interest indicates notable bearish positioning. With 26.0 days to cover, it would take significant time for short sellers to close their positions based on average trading volume.
Days to Cover History
Days to cover for Seaport Therapeutics (SPTX) currently stands at 26.0 days. This elevated days-to-cover ratio indicates it would take over two weeks of average trading volume for short sellers to exit their positions, suggesting potential for a short squeeze if positive news emerges. The days to cover has increased 1410.5% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 1.7 to 30.8 days.
SPTX Company Profile & Sector Positioning
Seaport Therapeutics (SPTX) operates in the Biotechnology industry within the broader Healthcare sector and is listed on the NASDAQ.