Ionis Pharmaceuticals - 34 Year Stock Price History | IONS

The latest closing stock price for Ionis Pharmaceuticals as of May 14, 2025 is 32.60.

  • An investor who bought $1,000 worth of Ionis Pharmaceuticals stock at the IPO in 1991 would have $2,535 today, roughly 3 times their original investment - a 3.78% compound annual growth rate over 34 years.
  • The all-time high Ionis Pharmaceuticals stock closing price was 86.14 on April 08, 2019.
  • The Ionis Pharmaceuticals 52-week high stock price is 52.34, which is 60.6% above the current share price.
  • The Ionis Pharmaceuticals 52-week low stock price is 23.95, which is 26.5% below the current share price.
  • The average Ionis Pharmaceuticals stock price for the last 52 weeks is 38.03.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.

Ionis Pharmaceuticals - 34 Year Stock Price History | IONS

  • An investor who bought $1,000 worth of Ionis Pharmaceuticals stock at the IPO in 1991 would have $2,535 today, roughly 3 times their original investment - a 3.78% compound annual growth rate over 34 years.
  • The all-time high Ionis Pharmaceuticals stock closing price was 86.14 on April 08, 2019.
  • The Ionis Pharmaceuticals 52-week high stock price is 52.34, which is 60.6% above the current share price.
  • The Ionis Pharmaceuticals 52-week low stock price is 23.95, which is 26.5% below the current share price.
  • The average Ionis Pharmaceuticals stock price for the last 52 weeks is 38.03.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.