Birchler Brian, EVP of Corporate and Development Operations at IONIS PHARMACEUTICALS INC ($IONS), sold about $3.5 million in company shares across six open market transactions over the past year. His most recent sale occurred on January 30, 2026. These sales rank 2,443rd among 11,678 individual insiders, below the average of $8.6 million per seller and 6.4 transactions. Birchler Brian made no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 27, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | J | Common Stock | 351 | $48.87 | 66,598.0000 | 158,964,772 | 0.53% | 0.00% |
| Jan. 29, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Common Stock | 11991 | $0.00 | 72,426.0000 | 158,964,772 | 19.84% | 0.01% |
| Jan. 30, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 6179 | $83.03 | 66,247.0000 | 158,964,772 | 8.53% | 0.00% |
| Jan. 15, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 20089 | $0.00 | 68,915.0000 | 158,964,772 | 41.14% | 0.01% |
| Jan. 15, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Performance Restricted Stock Units | 25800 | $0.00 | 79,138.0000 | 158,964,772 | 48.37% | 0.02% |
| Jan. 15, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Restricted Stock Unit | 9675 | $0.00 | 50,801.0000 | 158,964,772 | 23.53% | 0.01% |
| Jan. 15, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Restricted Stock Unit | 20089 | $0.00 | 41,126.0000 | 158,964,772 | 32.82% | 0.01% |
| Jan. 16, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 8480 | $75.11 | 60,435.0000 | 158,964,772 | 12.31% | 0.01% |
| Jan. 2, 2026 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Non-Qualified Stock Option (right to buy) | 19350 | $0.00 | 19,350.0000 | 158,964,772 | 9999.99% | 0.01% |
| Nov. 6, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 8000 | $76.17 | 48,826.0000 | 158,964,772 | 14.08% | 0.01% |
| Oct. 14, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Non-Qualified Stock Option (right to buy) | 11475 | $0.00 | 12,425.0000 | 158,964,772 | 48.01% | 0.01% |
| Oct. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 12425 | $53.77 | 69,251.0000 | 158,964,772 | 21.86% | 0.01% |
| Oct. 14, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 11475 | $72.03 | 56,826.0000 | 158,964,772 | 16.80% | 0.01% |
| Oct. 14, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 11475 | $53.77 | 68,301.0000 | 158,964,772 | 20.19% | 0.01% |
| Oct. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Non-Qualified Stock Option (right to buy) | 12425 | $0.00 | 0.0000 | 158,964,772 | 100.00% | 0.01% |
| Oct. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 12425 | $72.23 | 56,826.0000 | 158,964,772 | 17.94% | 0.01% |
| Aug. 29, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | J | Common Stock | 166 | $27.71 | 56,826.0000 | 158,964,772 | 0.29% | 0.00% |
| April 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Restricted Stock Unit | 1875 | $0.00 | 61,215.0000 | 158,964,772 | 2.97% | 0.00% |
| April 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 1875 | $0.00 | 57,340.0000 | 158,964,772 | 3.38% | 0.00% |
| April 16, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 680 | $28.37 | 56,660.0000 | 158,964,772 | 1.19% | 0.00% |
| Feb. 28, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | J | Common Stock | 414 | $28.21 | 55,465.0000 | 158,964,772 | 0.75% | 0.00% |
| Jan. 16, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 5400 | $32.70 | 55,051.0000 | 0 | 8.93% | 0.00% |
| Jan. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 14283 | $0.00 | 60,451.0000 | 0 | 30.94% | 0.00% |
| Jan. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Performance Restricted Stock Units | 22000 | $0.00 | 53,338.0000 | 0 | 70.20% | 0.00% |
| Jan. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Restricted Stock Unit | 33000 | $0.00 | 77,373.0000 | 0 | 74.37% | 0.00% |
| Jan. 15, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Restricted Stock Unit | 14283 | $0.00 | 63,090.0000 | 0 | 18.46% | 0.00% |
| Jan. 2, 2025 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Non-Qualified Stock Option (right to buy) | 22000 | $0.00 | 22,000.0000 | 0 | 9999.99% | 0.00% |
| Aug. 30, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | J | Common Stock | 12 | $38.64 | 46,168.0000 | 0 | 0.03% | 0.00% |
| April 15, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 1875 | $0.00 | 47,061.0000 | 0 | 4.15% | 0.00% |
| April 16, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 905 | $41.66 | 46,156.0000 | 0 | 1.92% | 0.00% |
| April 15, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Restricted Stock Unit | 1875 | $0.00 | 44,373.0000 | 0 | 4.05% | 0.00% |
| Feb. 29, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | Vice President Level 14 | J | Common Stock | 604 | $34.43 | 45,186.0000 | 0 | 1.35% | 0.00% |
| Jan. 16, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Restricted Stock Unit | 12080 | $0.00 | 46,248.0000 | 0 | 20.71% | 0.00% |
| Jan. 17, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 4497 | $50.42 | 44,582.0000 | 0 | 9.16% | 0.00% |
| Jan. 16, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 12080 | $0.00 | 49,079.0000 | 0 | 32.65% | 0.00% |
| Jan. 15, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Performance Restricted Stock Units | 17000 | $0.00 | 31,338.0000 | 0 | 118.57% | 0.00% |
| Jan. 15, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Restricted Stock Unit | 20400 | $0.00 | 58,328.0000 | 0 | 53.79% | 0.00% |
| Jan. 2, 2024 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | A | Non-Qualified Stock Option (right to buy) | 27200 | $0.00 | 27,200.0000 | 0 | 9999.99% | 0.00% |
| Dec. 28, 2023 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Non-Qualified Stock Option (right to buy) | 11500 | $0.00 | 15,482.0000 | 0 | 42.62% | 0.00% |
| Dec. 28, 2023 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 11500 | $47.34 | 48,028.0000 | 0 | 31.48% | 0.00% |
| Dec. 28, 2023 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | F | Common Stock | 11029 | $50.50 | 36,999.0000 | 0 | 22.96% | 0.00% |
| April 17, 2023 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Common Stock | 1875 | $0.00 | 37,200.0000 | 0 | 5.31% | 0.00% |
| April 18, 2023 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | S | Common Stock | 672 | $36.50 | 36,528.0000 | 0 | 1.81% | 0.00% |
| April 17, 2023 | IONIS PHARMACEUTICALS INC | $IONS | Birchler Brian | EVP, Corp and Development Ops | M | Restricted Stock Unit | 1875 | $0.00 | 27,720.0000 | 0 | 6.34% | 0.00% |