Brian Birchler
First SEC filing: March 24, 2023 · Latest: April 17, 2026
Insider at
Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 31, 2026 | IONS | J | 58 | $51.31 | $2,976 | 102,883 Direct | +0.06% | Acquired | -15.2% (price as of 2026-10-05) |
| April 16, 2026 | IONS | S | 973 | $75.04 | $73,014 | 67,500 Direct | -1.42% | Disposed | -42.0% (price as of 2026-10-05) |
| April 15, 2026 | IONS | M | 1,875 | · | · | 48,926 Direct | -3.69% | Disposed | (price as of 2026-10-05) |
| April 15, 2026 | IONS | M | 1,875 | · | · | 68,473 Direct | +2.82% | Acquired | (price as of 2026-10-05) |
| Feb. 27, 2026 | IONS | J | 351 | $48.87 | $17,153 | 66,598 Direct | +0.53% | Acquired | -11.0% (price as of 2026-10-05) |
| Jan. 30, 2026 | IONS | S | 6,179 | $83.03 | $513,042 | 66,247 Direct | -8.53% | Disposed | -47.6% (price as of 2026-10-05) |
| Jan. 29, 2026 | IONS | A | 11,991 | · | · | 72,426 Direct | +19.84% | Acquired | (price as of 2026-10-05) |
| Jan. 16, 2026 | IONS | S | 8,480 | $75.11 | $636,933 | 60,435 Direct | -12.31% | Disposed | -42.1% (price as of 2026-10-05) |
| Jan. 15, 2026 | IONS | A | 9,675 | · | · | 50,801 Direct | +23.53% | Acquired | (price as of 2026-10-05) |
| Jan. 15, 2026 | IONS | M | 20,089 | · | · | 41,126 Direct | -32.82% | Disposed | (price as of 2026-10-05) |
| Jan. 15, 2026 | IONS | A | 25,800 | · | · | 79,138 Direct | +48.37% | Acquired | (price as of 2026-10-05) |
| Jan. 15, 2026 | IONS | M | 20,089 | · | · | 68,915 Direct | +41.14% | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2026 | IONS | A | 19,350 | · | · | 19,350 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 6, 2025 | IONS | S 10b5-1 | 8,000 | $76.17 | $609,360 | 48,826 Direct | -14.08% | Disposed | -42.9% (price as of 2026-10-05) |
| Oct. 15, 2025 | IONS | M | 12,425 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Oct. 15, 2025 | IONS | S 10b5-1 | 12,425 | $72.23 | $897,458 | 56,826 Direct | -17.94% | Disposed | -39.8% (price as of 2026-10-05) |
| Oct. 15, 2025 | IONS | M | 12,425 | $53.77 | $668,092 | 69,251 Direct | +21.86% | Acquired | -19.1% (price as of 2026-10-05) |
| Oct. 14, 2025 | IONS | M | 11,475 | · | · | 12,425 Direct | -48.01% | Disposed | (price as of 2026-10-05) |
| Oct. 14, 2025 | IONS | S 10b5-1 | 11,475 | $72.03 | $826,544 | 56,826 Direct | -16.80% | Disposed | -39.6% (price as of 2026-10-05) |
| Oct. 14, 2025 | IONS | M | 11,475 | $53.77 | $617,011 | 68,301 Direct | +20.19% | Acquired | -19.1% (price as of 2026-10-05) |
| Aug. 29, 2025 | IONS | J | 166 | $27.71 | $4,600 | 56,826 Direct | +0.29% | Acquired | 57.0% (price as of 2026-10-05) |
| April 16, 2025 | IONS | S | 680 | $28.37 | $19,292 | 56,660 Direct | -1.19% | Disposed | 53.3% (price as of 2026-10-05) |
| April 15, 2025 | IONS | M | 1,875 | · | · | 61,215 Direct | -2.97% | Disposed | (price as of 2026-10-05) |
| April 15, 2025 | IONS | M | 1,875 | · | · | 57,340 Direct | +3.38% | Acquired | (price as of 2026-10-05) |
| Feb. 28, 2025 | IONS | J | 414 | $28.21 | $11,679 | 55,465 Direct | +0.75% | Acquired | 54.2% (price as of 2026-10-05) |
| Jan. 16, 2025 | IONS | S | 5,400 | $32.70 | $176,580 | 55,051 Direct | -8.93% | Disposed | 33.0% (price as of 2026-10-05) |
| Jan. 15, 2025 | IONS | M | 14,283 | · | · | 63,090 Direct | -18.46% | Disposed | (price as of 2026-10-05) |
| Jan. 15, 2025 | IONS | A | 33,000 | · | · | 77,373 Direct | +74.37% | Acquired | (price as of 2026-10-05) |
| Jan. 15, 2025 | IONS | A | 22,000 | · | · | 53,338 Direct | +70.20% | Acquired | (price as of 2026-10-05) |
| Jan. 15, 2025 | IONS | M | 14,283 | · | · | 60,451 Direct | +30.94% | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2025 | IONS | A | 22,000 | · | · | 22,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 30, 2024 | IONS | J | 12 | $38.64 | $464 | 46,168 Direct | +0.03% | Acquired | 12.6% (price as of 2026-10-05) |
| April 16, 2024 | IONS | S | 905 | $41.66 | $37,702 | 46,156 Direct | -1.92% | Disposed | 4.4% (price as of 2026-10-05) |
| April 15, 2024 | IONS | M | 1,875 | · | · | 44,373 Direct | -4.05% | Disposed | (price as of 2026-10-05) |
| April 15, 2024 | IONS | M | 1,875 | · | · | 47,061 Direct | +4.15% | Acquired | (price as of 2026-10-05) |
| Feb. 29, 2024 | IONS | J | 604 | $34.42 | $20,790 | 45,186 Direct | +1.35% | Acquired | 26.4% (price as of 2026-10-05) |
| Jan. 17, 2024 | IONS | S | 4,497 | $50.42 | $226,739 | 44,582 Direct | -9.16% | Disposed | -13.7% (price as of 2026-10-05) |
| Jan. 16, 2024 | IONS | M | 12,080 | · | · | 46,248 Direct | -20.71% | Disposed | (price as of 2026-10-05) |
| Jan. 16, 2024 | IONS | M | 12,080 | · | · | 49,079 Direct | +32.65% | Acquired | (price as of 2026-10-05) |
| Jan. 15, 2024 | IONS | A | 20,400 | · | · | 58,328 Direct | +53.79% | Acquired | (price as of 2026-10-05) |
| Jan. 15, 2024 | IONS | A | 17,000 | · | · | 31,338 Direct | +118.57% | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2024 | IONS | A | 27,200 | · | · | 27,200 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 28, 2023 | IONS | M | 11,500 | · | · | 15,482 Direct | -42.62% | Disposed | (price as of 2026-10-05) |
| Dec. 28, 2023 | IONS | F | 11,029 | $50.50 | $556,964 | 36,999 Direct | -22.96% | Disposed | -13.9% (price as of 2026-10-05) |
| Dec. 28, 2023 | IONS | M | 11,500 | $47.34 | $544,410 | 48,028 Direct | +31.48% | Acquired | -8.1% (price as of 2026-10-05) |
| April 18, 2023 | IONS | S | 672 | $36.50 | $24,528 | 36,528 Direct | -1.81% | Disposed | 19.2% (price as of 2026-10-05) |
| April 17, 2023 | IONS | M | 1,875 | · | · | 27,720 Direct | -6.34% | Disposed | (price as of 2026-10-05) |
| April 17, 2023 | IONS | M | 1,875 | · | · | 37,200 Direct | +5.31% | Acquired | (price as of 2026-10-05) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| April 15, 2026 | IONS | Restricted Stock Unit | Common Stock | · | · | 1,875 | Disposed |
| Jan. 15, 2026 | IONS | Restricted Stock Unit [F8] | Common Stock | · | · | 9,675 | Acquired |
| Jan. 15, 2026 | IONS | Restricted Stock Unit | Common Stock | · | · | 20,089 | Disposed |
| Jan. 15, 2026 | IONS | Performance Restricted Stock Units [F4] | Common Stock | $0.00 | · | 25,800 | Acquired |
| Jan. 2, 2026 | IONS | Non-Qualified Stock Option (right to buy) | Common Stock | $79.67 | Jan. 1, 2036 | 19,350 | Acquired |
| Oct. 15, 2025 | IONS | Non-Qualified Stock Option (right to buy) | Common Stock | $53.77 | Jan. 1, 2026 | 12,425 | Disposed |
| Oct. 14, 2025 | IONS | Non-Qualified Stock Option (right to buy) | Common Stock | $53.77 | Jan. 1, 2026 | 11,475 | Disposed |
| April 15, 2025 | IONS | Restricted Stock Unit | Common Stock | · | · | 1,875 | Disposed |
| Jan. 15, 2025 | IONS | Restricted Stock Unit | Common Stock | · | · | 14,283 | Disposed |
| Jan. 15, 2025 | IONS | Restricted Stock Unit [F5] | Common Stock | · | · | 33,000 | Acquired |
| Jan. 15, 2025 | IONS | Performance Restricted Stock Units [F3] | Common Stock | $0.00 | · | 22,000 | Acquired |
| Jan. 2, 2025 | IONS | Non-Qualified Stock Option (right to buy) | Common Stock | $34.69 | Jan. 1, 2035 | 22,000 | Acquired |
| April 15, 2024 | IONS | Restricted Stock Unit | Common Stock | · | · | 1,875 | Disposed |
| Jan. 16, 2024 | IONS | Restricted Stock Unit | Common Stock | · | · | 12,080 | Disposed |
| Jan. 15, 2024 | IONS | Restricted Stock Unit [F3] | Common Stock | · | · | 20,400 | Acquired |
| Jan. 15, 2024 | IONS | Performance Restricted Stock Units [F1] | Common Stock | $0.00 | · | 17,000 | Acquired |
| Jan. 2, 2024 | IONS | Non-Qualified Stock Option (right to buy) | Common Stock | $52.87 | Jan. 1, 2034 | 27,200 | Acquired |
| Dec. 28, 2023 | IONS | Non-Qualified Stock Option (right to buy) | Common Stock | $47.34 | Jan. 2, 2024 | 11,500 | Disposed |
| April 17, 2023 | IONS | Restricted Stock Unit | Common Stock | · | · | 1,875 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 16 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 24, 2023 | IONS | Common Stock | 35,325 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 19,500 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 15,000 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 22,942 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 26,982 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 31,500 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 23,900 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 22,000 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 26,063 | Direct |
| March 24, 2023 | IONS | Non-Qualified Stock Option (right to buy) | 15,500 | Direct |
| March 24, 2023 | IONS | Performance Restricted Stock Units [F10] | 14,338 | Direct |
| March 24, 2023 | IONS | Restricted Stock Unit [F12] | 2,896 | Direct |
| March 24, 2023 | IONS | Restricted Stock Unit [F12] | 4,888 | Direct |
| March 24, 2023 | IONS | Restricted Stock Unit [F12] | 7,312 | Direct |
| March 24, 2023 | IONS | Restricted Stock Unit [F12] | 7,500 | Direct |
| March 24, 2023 | IONS | Restricted Stock Unit [F12] | 17,207 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $580,154 | $617,284 | $1,095,930 | $366,767 | · | · | $48,009 | $3,245,054 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.