Ionis Pharmaceuticals market cap IONS

Share price times shares outstanding: what the whole company sells for, since 2010.

Ionis Pharmaceuticals is worth $7.1B at the close on Oct 23, 2026, at $42.93 a share.

That is down 37% over the last year and up 59% over five years.

Its highest close in our data was $14B in Feb 2026.

Market cap over time

Year	End of year	Low	High	Change
2026 so far	$7.1B	$7.1B	$14B	−45%
2025	$12.9B	$4.3B	$13.4B	+128%
2024	$5.7B	$5.4B	$7.7B	−22%
2023	$7.3B	$4.9B	$7.4B	+35%
2022	$5.4B	$4.2B	$6.6B	+25%
2021	$4.3B	$3.7B	$8.6B	−46%
2020	$7.9B	$6.1B	$8.8B	−8%
2019	$8.5B	$7.5B	$11.8B	+21%
2018	$7.1B	$5.1B	$8B	+13%
2017	$6.3B	$4.8B	$8B	+8%
2016	$5.8B	$2.6B	$6.8B	−22%
2015	$7.4B	$5.2B	$8.8B	−1%
2014	$7.5B	$2.8B	$7.7B	+61%
2013	$4.7B	$1.1B	$4.8B	+356%
2012	$1B	$725M	$1.5B	+42%
2011	$719M	$645.2M	$1B	−28%
2010	$1B	$788.5M	$1B	n/a

Companies in Drug Manufacturers - General nearest Ionis Pharmaceuticals' size, closest first, today.

Company	Market cap
IONSIonis Pharmaceuticals	$7.1B
ALKSAlkermes plc.	$7.3B
AMRXAmneal Pharmaceuticals	$6.5B
TGTXTG Therapeutics	$8.3B
LGNDLigand Pharmaceuticals	$6.1B
KNSAKiniksa Pharmaceuticals International	$6B
PTGXProtagonist Therapeutics	$9B
CORTCorcept Therapeutics	$9.3B
BMRNBiomarin Pharmaceutical	$10.8B
INDVIndivior Pharmaceuticals	$4.1B
ARQTArcutis Biotherapeutics	$3.9B
Peer median	$6.9B