IONIS PHARMACEUTICALS INC
Institutional investors holding IONS
| Investor | Weight | Quarter |
|---|---|---|
| Tweedy Browne Co. | 13.57% | 2026Q1 |
| Kenneth Fisher | 0.00% | 2026Q1 |
Congressional data coming soon
27
Total trades
$26.0M
Volume
0
Buys
14
Sells
Last trade: Jun 1, 2026
| Date | Insider | Type | Value |
|---|---|---|---|
| Jun 1, 2026 | BERTHELSEN SPENCER R | Sell | $605K |
| Jun 1, 2026 | BERTHELSEN SPENCER R | Option | $195K |
Congressional trade data is being sourced and will appear here shortly.
| May 4, 2026 |
| Joseph Loscalzo |
| Sell |
| $4.5M |
| May 4, 2026 | Joseph Loscalzo | Sell | $1.3M |
| May 4, 2026 | Joseph Loscalzo | Option | $417K |
| May 4, 2026 | Joseph Loscalzo | Option | $481K |
| May 4, 2026 | Joseph Loscalzo | Option | $424K |
| May 4, 2026 | Joseph Loscalzo | Option | $686K |
| Apr 28, 2026 | Joseph Baroldi | Sell | $117K |