Ionis Pharmaceuticals, Inc. IONS

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40.15 USD -0.27 (-0.67%)

At closeNov 4, 2026, 5:30 PM EST

40.15 0.00 0.00%

After hours · Nov 4, 5:30 PM ET

39.33 Day range 41.53

39.33 52-week range 86.74

Held by insiders 0.60%

Held by institutions 110.12%

Float held by institutions 110.77%

Institutions 696

Top institutional holders
Holder	% held	Shares	Value	Reported
FMR, LLC	14.82%	24,631,956	988.97M	Jun 29, 2026
Capital World Investors	13.04%	21,669,226	870.02M	Jun 29, 2026
Blackrock Inc.	6.44%	10,704,660	429.79M	Jun 29, 2026
Vanguard Portfolio Management LLC	4.73%	7,859,529	315.56M	Jun 29, 2026
Wellington Management Group, LLP	4.60%	7,651,415	307.20M	Jun 29, 2026
Vanguard Capital Management LLC	4.34%	7,211,497	289.54M	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	341.42M	Aug 30, 2026
Growth Fund of America	4.61%	7,668,655	307.90M	Sep 29, 2026
VANGUARD SPECIALIZED FUNDS-Vanguard Health Care Fund	3.74%	6,212,640	249.44M	Jul 30, 2026
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	3.00%	4,989,044	200.31M	Jun 29, 2026
New Economy Fund	2.93%	4,868,802	195.48M	Sep 29, 2026
SmallCap World Fund Inc	2.68%	4,458,145	178.99M	Sep 29, 2026

IONS insiders
Insider	Relation	Latest transaction	Date	Shares held
BAROLDI JOSEPH	Officer	Sale	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	Sale	Nov 5, 2025	59,657
HAYDEN MICHAEL REUBEN	Director	Purchase	Jul 30, 2026	0

Held by funds