Trade Summary

6 days ago, Kordasiewicz Holly B., serving as EVP, Chief Development Officer at IONIS PHARMACEUTICALS INC (IONS), sold 60,846 shares at $73.41 per share, for a total transaction value of $4,466,427.83. Following this transaction, Kordasiewicz Holly B. now holds 22,458 shares of IONS.

This sale represents a 73.04% decrease in Kordasiewicz Holly B.'s stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Friday, June 12, 2026 and publicly disclosed via SEC Form 4 filing on Tuesday, June 16, 2026 at 5:26 PM ET, 4 days after the trade was made.

IONIS PHARMACEUTICALS INC operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.