Ionis Pharmaceuticals Inc

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP IONS

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/13/2026

Shares

1,063,327

Value ($000)

84,120

Weight

0.0%

2019 Q4 - 2025 Q4 (7 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/13/2026	84,120	0.0%	1,063,327	12/31/2025
2025 Q3	11/13/2025	41,223	0.0%	630,136	9/30/2025
2022 Q2	8/15/2022	1,522	0.0%	41,104	6/30/2022
2021 Q3	11/12/2021	1,378	0.0%	41,100	9/30/2021
2021 Q2	8/13/2021	3,706	0.0%	92,900	6/30/2021
2020 Q3	11/12/2020	1,234	0.0%	26,000	9/30/2020
2019 Q4	2/13/2020	855	0.0%	14,157	12/31/2019