IONS
IONIS PHARMACEUTICALS INC
Latest close $54.19 as of Aug 5, 2026
Schedule 13G/13D reports beneficial ownership at an observation date. “Accumulation” or “reduction” is inferred
from changes in reported shares when available; it is not a list of individual trades or exact execution prices.
Form 13F rows are quarter-end holding context only and do not establish an exact entry date.
Free access includes current parsed ownership filings, reported share changes, and ownership-percentage changes.
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Beneficial ownership filing history
Showing 3 of 4 parsed filing(s) · 1 older require more history access| Holder | Observed / filed | Reported change | Shares | Ownership | Observation | Filing | Latest |
|---|---|---|---|---|---|---|---|
| T. Rowe Price Investment Management CIK0001897612 | Mar 31, 2026 observed May 15, 2026 filed · 45d Schedule 13G amendment | Reported reduction | 6.2M -2.9M | 12.00% 0.00 pts | $75.09 | $74.23 | $54.19 |
| T. Rowe Price Investment Management CIK0001897612 | Dec 31, 2025 observed Feb 17, 2026 filed · 48d Schedule 13G amendment | Reported reduction | 9.1M -4.0M | 12.00% 0.00 pts | $79.11 | $81.36 | $54.19 |
| T. Rowe Price Investment Management CIK0001897612 | Sep 30, 2025 observed Nov 14, 2025 filed · 45d Schedule 13G amendment | Earliest Schedule 13G amendment found | 13.2M | 12.00% | $71.55 | $54.19 |