Daily trading records
Ionis Pharmaceuticals Stock Price on August 18, 2026
Direct answer
Ionis Pharmaceuticals closed at $59.62 on August 18, 2026.
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Review Ionis Pharmaceuticals's price trend and period performance.
The chart connects verified session closes from May 21, 2026 through August 18, 2026.
Period performance is calculated from verified trading sessions.
5-session performance
+7.58%
From the August 11, 2026 close of $55.42 to $59.62 on August 18, 2026.
20-session performance
+11.67%
From the July 21, 2026 close of $53.39 to $59.62 on August 18, 2026.
60-session performance
-21.32%
From the May 21, 2026 close of $75.78 to $59.62 on August 18, 2026.
Verified data
- Open
- $58.405
- High
- $60.19
- Low
- $58.0237
- Close
- $59.62
- Volume
- 3,192,641
- Prior-close change
- +$0.99 (+1.69%)
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Read the frequently asked questions.
What was Ionis Pharmaceuticals's closing price on August 18, 2026?
Ionis Pharmaceuticals closed at $59.62 on August 18, 2026.
What were Ionis Pharmaceuticals's open, high and low on August 18, 2026?
The open was $58.405, the high was $60.19 and the low was $58.0237.
How much did Ionis Pharmaceuticals change from the prior close on August 18, 2026?
The change from the prior close was +$0.99 (+1.69%).
What was Ionis Pharmaceuticals's volume on August 18, 2026?
Trading volume was 3,192,641 shares.
What is the source for Ionis Pharmaceuticals's daily prices?
Daily aggregate prices are provided by Polygon.