Brian Birchler serves as Executive at IONIS PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Brian Birchler has executed 19 insider transactions totaling $3.1M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 30, 2026 involved selling 6,179 shares valued at $513.0K.
Brian Birchler currently holds 66,247 shares of IONIS PHARMACEUTICALS INC (IONS), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Brian Birchler has been a net seller of IONS stock. They have purchased $0 and sold $3.1M worth of shares.
Brian Birchler's most recent insider trade was on Jan 30, 2026, when they sold 6,179 shares at $83.03 per share.
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| $N/A |
| Discretionary |
| Jan 2, 2026 | IONS | $0 | Award | 19,350 | $N/A | Discretionary |
| Nov 6, 2025 | IONS | $609.4K | Sale | 8,000 | $76.17 | Discretionary |
| Oct 15, 2025 | IONS | $897.5K | Sale | 12,425 | $72.23 | Discretionary |
| Oct 15, 2025 | IONS | $668.1K | Option Exercise | 12,425 | $53.77 | Discretionary |
| Oct 14, 2025 | IONS | $617.0K | Option Exercise | 11,475 | $53.77 | Discretionary |
| Oct 14, 2025 | IONS | $826.5K | Sale | 11,475 | $72.03 | Discretionary |
| Aug 29, 2025 | IONS | $4.6K | Other | 166 | $27.71 | Discretionary |
| Aug 30, 2024 | IONS | $464 | Other | 12 | $38.64 | Discretionary |
| Apr 16, 2024 | IONS | $37.7K | Sale | 905 | $41.66 | Discretionary |
| Apr 15, 2024 | IONS | $0 | Option Exercise | 1,875 | $N/A | Discretionary |
| Feb 29, 2024 | IONS | $20.8K | Other | 604 | $34.43 | Discretionary |
| Jan 17, 2024 | IONS | $226.7K | Sale | 4,497 | $50.42 | Discretionary |
| Jan 16, 2024 | IONS | $0 | Option Exercise | 12,080 | $N/A | Discretionary |
| Dec 28, 2023 | IONS | $557.0K | Payment | 11,029 | $50.50 | Discretionary |
| Dec 28, 2023 | IONS | $544.4K | Option Exercise | 11,500 | $47.34 | Discretionary |
| Apr 18, 2023 | IONS | $24.5K | Sale | 672 | $36.50 | Discretionary |
| Apr 17, 2023 | IONS | $0 | Option Exercise | 1,875 | $N/A | Discretionary |