Ionis Pharmaceuticals, Inc.
IONSNASDAQHealthcare● Active
$74.48
$-0.65(-0.87%)
Market Cap$12.3B
P/E Ratio—
52W High$86.74
52W Low$34.78
Ionis Pharmaceuticals, Inc. (IONS) Stock Splits
No forward or reverse splits on record since IPO — details below.
FMP · IONS · as of Jun 5, 2026
Key split metrics
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Ionis Pharmaceuticals, Inc. (IONS) has been publicly traded since May 17, 1991 with no forward or reverse splits on record.
About stock split history
Ionis Pharmaceuticals, Inc. (IONS) has never undergone a stock split since going public.
Frequently asked questions
Ionis Pharmaceuticals, Inc. (IONS) has never split its stock since going public.
IONS stock split historyhas IONS ever stock splitno stock split since IPO
Data: Financial Modeling Prep · Updated daily · For informational purposes only, not investment advice.