Ionis Pharmaceuticals, Inc. (Nasdaq: IONS) today announced that management will participate in fireside chats at the following investor conferences:

• 24^th Annual Needham Virtual Healthcare Conference on Monday, April 7, 2025
• Bank of America 2025 Health Care Conference on Wednesday, May 14, 2025
• 2025 RBC Capital Markets Global Healthcare Conference on Wednesday, May 21, 2025

A live webcast of these presentations can be accessed on the Investors & Media section of the Ionis website at https://ir.ionis.com/events-and-presentations/upcoming-events. Replays will be available on the Ionis website within 48 hours and will be archived for a limited time.

About Ionis Pharmaceuticals

For three decades, Ionis has invented medicines that bring better futures to people with serious diseases. Ionis currently has six marketed medicines and a leading pipeline in neurology, cardiology and select areas of high patient need. As the pioneer in RNA-targeted medicines, Ionis continues to drive innovation in RNA therapies in addition to advancing new approaches in gene editing. A deep understanding of disease biology and industry-leading technology propels our work, coupled with a passion and urgency to deliver life-changing advances for patients. To learn more about Ionis, visit Ionis.com and follow us on X (Twitter), LinkedIn and Instagram.

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