Ionis Pharmaceuticals (IONS) - Market capitalization

Market cap: £9.78 Billion

As of February 2026 Ionis Pharmaceuticals has a market cap of £9.78 Billion. This makes Ionis Pharmaceuticals the world's 1599th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Ionis Pharmaceuticals from 1996 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	£9.78 B	1.78%
2025	£9.61 B	112.77%
2024	£4.51 B	-20.69%
2023	£5.69 B	28.47%
2022	£4.43 B	39.31%
2021	£3.18 B	-45.11%
2020	£5.79 B	-10.29%
2019	£6.46 B	10.06%
2018	£5.87 B	26.47%
2017	£4.64 B	-1.14%
2016	£4.69 B	-6.59%
2015	£5.02 B	7.08%
2014	£4.69 B	66.97%
2013	£2.81 B	329.16%
2012	£0.65 B	41.69%
2011	£0.46 B	-29%
2010	£0.65 B	-3.99%
2009	£0.67 B	-27.69%
2008	£0.93 B	35.69%
2007	£0.69 B	48.06%
2006	£0.46 B	112.92%
2005	£0.21 B	24.27%
2004	£0.17 B	-12.55%
2003	£0.20 B	-11.04%
2002	£0.22 B	-72.41%
2001	£0.82 B	196.19%
2000	£0.27 B	127.13%
1999	£0.12 B	-41.91%
1998	£0.21 B	5.36%
1997	£0.19 B	-27.46%
1996	£0.27 B

End of Day market cap according to different sources

On Feb 1st, 2026 the market cap of Ionis Pharmaceuticals was reported to be:

£9.78 Billion

by Nasdaq

£9.78 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Nymox Pharmaceutical NYMX	£13.33 M	-99.86%	Bahamas
NRC Health NRC	£0.34 B	-96.50%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Ionis Pharmaceuticals (IONS)

Market cap: £9.78 Billion