Form 13F security
IONS · IONIS PHARMACEUTICALS INC.
Class COM
As filed on Form 13F — long US-listed positions only. No shorts, cash, bonds, or non-13F assets appear here.
Filed up to 45 days after quarter end; holdings may have changed since.
Tracked managers holding it
Share and principal positions
| Manager | Quarter | Value | % of portfolio | SH/PRN qty | Put/call |
|---|---|---|---|---|---|
| Tweedy, Browne Co LLC | 2026-06-30 | $181M | 13.7% | SH 2,280,311 | — |
| Fisher Asset Management, LLC — Ken Fisher | 2026-06-30 | $11M | <0.1% | SH 137,184 | — |
| HORIZON KINETICS ASSET MANAGEMENT LLC | 2026-06-30 | $0.9M | <0.1% | SH 10,904 | — |
Total $193M across 3 of 69 managers.
Put positions
| Manager | Quarter | Value | % of portfolio | SH/PRN qty | Put/call |
|---|---|---|---|---|---|
| Point72 Asset Management, L.P. | 2026-06-30 | $1.1M | <0.1% | SH 13,900 | [PUT] |
Total $1.1M across 1 of 69 managers.
Call positions
| Manager | Quarter | Value | % of portfolio | SH/PRN qty | Put/call |
|---|---|---|---|---|---|
| Point72 Asset Management, L.P. | 2026-06-30 | $1.6M | <0.1% | SH 20,300 | [CALL] |
Total $1.6M across 1 of 69 managers.
Sums are across tracked reports, not unique economic ownership.
Filed rows (5) — as filed
| Manager | Class | Put/call | Value | % of portfolio | SH/PRN qty | Source |
|---|---|---|---|---|---|---|
| Tweedy, Browne Co LLC | COM | — | $181M | 13.7% | SH 2,280,311 | 0001193125-26-340443 |
| Fisher Asset Management, LLC | COM | — | $11M | <0.1% | SH 137,184 | 0000850529-26-000006 |
| Point72 Asset Management, L.P. | COM | [CALL] | $1.6M | <0.1% | SH 20,300 | 0000919574-26-005520 |
| Point72 Asset Management, L.P. | COM | [PUT] | $1.1M | <0.1% | SH 13,900 | 0000919574-26-005520 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | COM | — | $0.9M | <0.1% | SH 10,904 | 0001398344-26-014047 |