Daily trading records
Seaport Therapeutics Stock Price on September 18, 2026
Direct answer
Seaport Therapeutics closed at $21.39 on September 18, 2026.
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Review Seaport Therapeutics's price trend and period performance.
The chart connects verified session closes from June 24, 2026 through September 18, 2026.
Period performance is calculated from verified trading sessions.
5-session performance
-8.35%
From the September 11, 2026 close of $23.34 to $21.39 on September 18, 2026.
20-session performance
-11.00%
From the August 20, 2026 close of $24.035 to $21.39 on September 18, 2026.
60-session performance
+10.77%
From the June 24, 2026 close of $19.31 to $21.39 on September 18, 2026.
Verified data
- Open
- $21.88
- High
- $23.10
- Low
- $21.285
- Close
- $21.39
- Volume
- 2,178,493
- Prior-close change
- -$0.43 (-1.97%)
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Read the frequently asked questions.
What was Seaport Therapeutics's closing price on September 18, 2026?
Seaport Therapeutics closed at $21.39 on September 18, 2026.
What were Seaport Therapeutics's open, high and low on September 18, 2026?
The open was $21.88, the high was $23.10 and the low was $21.285.
How much did Seaport Therapeutics change from the prior close on September 18, 2026?
The change from the prior close was -$0.43 (-1.97%).
What was Seaport Therapeutics's volume on September 18, 2026?
Trading volume was 2,178,493 shares.
What is the source for Seaport Therapeutics's daily prices?
Daily aggregate prices are provided by Polygon.