Brian Birchler insider trades: Ionis Pharmaceuticals (IONS) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Brian reports to the SEC
Open-market buys and sales
10 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Apr 16, 2026 | IONS | ↓ Sell | 973 | $75.04 | $73K | Direct | Apr 17, 2026 (1d) |
| Jan 30, 2026 | IONS | ↓ Sell | 6,179 | $83.03 | $513K | Direct | Feb 2, 2026 (3d) |
| Jan 16, 2026 | IONS | ↓ Sell | 8,480 | $75.11 | $637K | Direct | Jan 20, 2026 (4d) |
| Nov 6, 2025 | IONS | ↓ Sell10b5-1 | 8,000 | $76.17 | $609K | Direct | Nov 7, 2025 (1d) |
| Oct 15, 2025 | IONS | ↓ Sell10b5-1 | 23,900 | $72.13 | $1.7M | Direct | Oct 16, 2025 (1d) |
| Apr 16, 2025 | IONS | ↓ Sell | 680 | $28.37 | $19K | Direct | Apr 17, 2025 (1d) |
| Jan 16, 2025 | IONS | ↓ Sell | 5,400 | $32.70 | $177K | Direct | Jan 17, 2025 (1d) |
| Apr 16, 2024 | IONS | ↓ Sell | 905 | $41.66 | $38K | Direct | Apr 17, 2024 (1d) |
| Jan 17, 2024 | IONS | ↓ Sell | 4,497 | $50.42 | $227K | Direct | Jan 18, 2024 (1d) |
| Apr 18, 2023 | IONS | ↓ Sell | 672 | $36.50 | $25K | Direct | Apr 19, 2023 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other IONS insiders
Open-market trades in the last 12 months
About Brian Birchler's insider trades
Brian Birchler is EVP, Corp and Development Ops at Ionis Pharmaceuticals (IONS). Since Apr 18, 2023, Brian has reported no open-market purchases and 10 sales worth $4.0M on SEC Form 4. In the last 12 months: 4 sales ($1.8M).
2 sales (58% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include option exercises (9 filings), grants and awards (7 filings), other transactions (6 filings), shares withheld for taxes (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every IONS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.