Ionis Pharmaceuticals, Inc. IONS

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40.42 USD -0.82 (-1.99%)

At closeNov 3, 2026, 5:14 PM EST

40.42 0.00 0.00%

After hours · Nov 3, 5:14 PM ET

40.26 Day range 41.83

40.26 52-week range 86.74

Held by insiders 0.60%

Held by institutions 110.06%

Float held by institutions 110.72%

Institutions 699

Top institutional holders
Holder	% held	Shares	Value	Reported
FMR, LLC	14.82%	24,631,956	995.62M	Jun 29, 2026
Capital World Investors	13.04%	21,669,226	875.87M	Jun 29, 2026
Blackrock Inc.	6.44%	10,704,660	432.68M	Jun 29, 2026
Vanguard Portfolio Management LLC	4.73%	7,859,529	317.68M	Jun 29, 2026
Wellington Management Group, LLP	4.60%	7,651,415	309.27M	Jun 29, 2026
Vanguard Capital Management LLC	4.34%	7,211,497	291.49M	Jun 29, 2026

Top mutual fund holders
Holder	% held	Shares	Value	Reported
Fidelity Mt. Vernon Street Trust-Fidelity Growth Company Fund	5.12%	8,503,655	343.72M	Aug 30, 2026
Growth Fund of America	4.61%	7,668,655	309.97M	Sep 29, 2026
VANGUARD SPECIALIZED FUNDS-Vanguard Health Care Fund	3.74%	6,212,640	251.11M	Jul 30, 2026
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	3.00%	4,989,044	201.66M	Jun 29, 2026
New Economy Fund	2.93%	4,868,802	196.80M	Sep 29, 2026
SmallCap World Fund Inc	2.68%	4,458,145	180.20M	Sep 29, 2026

IONS insiders
Insider	Relation	Latest transaction	Date	Shares held
BAROLDI JOSEPH	Officer	Conversion of Exercise of derivative security	Jun 25, 2026	0
BENNETT C FRANK	Officer	Sale	Jul 6, 2026	0
BERTHELSEN SPENCER R	Director	Conversion of Exercise of derivative security	Jul 14, 2026	161,303
BIRCHLER BRIAN	Officer	Sale	Apr 15, 2026	67,500
GEARY RICHARD S	Officer	Conversion of Exercise of derivative security	Nov 5, 2025	59,657
HAYDEN MICHAEL REUBEN	Director	Purchase	Jul 30, 2026	0

Held by funds