Trade Summary

4 days ago, BERTHELSEN SPENCER R, serving as Dir at IONIS PHARMACEUTICALS INC (IONS), sold 8,000 shares at $75.67 per share, for a total transaction value of $605,360.00. Following this transaction, BERTHELSEN SPENCER R now holds 156,013 shares of IONS.

This sale represents a 4.88% decrease in BERTHELSEN SPENCER R's stake in the company. This is considered a medium-conviction trade.

The trade was executed on Monday, June 1, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, June 3, 2026 at 5:34 PM ET, 2 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.