Trade Summary

6 days ago, O'Neil Patrick R., serving as EVP CLO, GC at Ionis Pharmaceuticals Inc (IONS), sold 10,148 shares at $75.25 per share, for a total transaction value of $763,662.00. Following this transaction, O'Neil Patrick R. now holds 62,211 shares of IONS.

This sale represents a 14.00% decrease in O'Neil Patrick R.'s stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Monday, March 9, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, March 11, 2026, 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.