Ionis Pharmaceuticals, Inc. (IONS) Shares Outstanding

Shares Outstanding

165.26M160.38K+0.10%

May 1, 2026

Summary

Current Value: As of today, IONS has 165.26M outstanding shares, up +0.10% on May 1, 2026
Historical Performance: IONS shares outstanding is up +3.83% year-over-year, up +15.49% over the past 3 years
All-Time High Comparison: IONS shares outstanding is currently at its all-time high
3-Year Low Comparison: IONS shares outstanding is +15.49% above its 3-year low of 143.09M reached on an earlier date

Chart

Performance

IONS Performance
Metric	Date	Value	1Y	3Y	5Y
Shares Outstanding	May 1, 26	165.26M	+3.8%	+15.5%	+17.2%
Price	May 20, 26	$75.23	+118.3%	+92.0%	+105.8%
Market Cap	May 20, 26	$12B	+126.6%	+121.7%	+141.2%
PE Ratio	May 20, 26	-	–	–	–
TTM Revenue	Mar 31, 26	$1.06B	+47.4%	+83.6%	+49.6%
TTM EPS	Mar 31, 26	-$2.10	+29.5%	+9.0%	+40.5%
	May 20, 26	$13.07B	+146.7%	+154.4%	+205.9%
TTM Net Income	Mar 31, 26	-$326.58M	+28.6%	+0.6%	+37.2%
TTM Dividend	May 20, 26	-	–	–	–

Highs

IONS Shares Outstanding Highs Comparison
Period	High	Date	Current
1Y	165.26M	May 1, 26	at high
3Y	165.26M	May 1, 26	at high
5Y	165.26M	May 1, 26	at high
All	165.26M	May 1, 26	at high

Lows

IONS Shares Outstanding Lows Comparison
Period	Low	Date	Current
1Y	159.16M	N/A	+3.8%
3Y	143.09M	N/A	+15.5%
5Y	140.96M	N/A	+17.2%
All	8.18M	Mar 30, 90	+1921.6%

History

Month	Value	Change
May 2026	165.26M	+1.2%
Dec 2025	163.30M	+3.4%
Dec 2024	157.91M	+9.4%
Dec 2023	144.34M	+1.6%
Dec 2022	142.06M	+0.6%
Dec 2021	141.21M	+0.6%
Dec 2020	140.37M	+0.0%
Dec 2019	140.34M	+1.7%
Dec 2018	137.93M	+10.4%
Dec 2017	124.98M	+2.7%
Dec 2016	121.64M	+1.1%
Dec 2015	120.35M	+1.6%
Dec 2014	118.44M	+1.7%
Dec 2013	116.47M	+14.8%
Dec 2012	101.48M	+1.4%
Dec 2011	100.04M	+0.7%
Dec 2010	99.39M	+0.5%
Dec 2009	98.85M	+1.9%
Nov 2008	97.00M	+11.2%

Month	Value	Change
Dec 2007	87.24M	+6.0%
Dec 2006	82.28M	+14.0%
Dec 2005	72.20M	+25.7%
Dec 2004	57.45M	+3.4%
Dec 2003	55.56M	+0.6%
Dec 2002	55.22M	+2.7%
Dec 2001	53.75M	+37.8%
Nov 2000	39.01M	+23.4%
Dec 1999	31.61M	+16.9%
Dec 1998	27.05M	+1.5%
Dec 1997	26.66M	+1.7%
Dec 1996	26.20M	+3.8%
Dec 1995	25.25M	+28.1%
Dec 1994	19.72M	+5.0%
Dec 1993	18.77M	+44.1%
Dec 1992	13.03M	+1.5%
Dec 1991	12.85M	+57.1%
Dec 1990	8.18M	-

FAQ

What is the current shares outstanding of IONS?
As of today, IONS shares outstanding is 165.26M
What is 1-year change in IONS shares outstanding?
IONS shares outstanding is up +3.83% year-over-year
What is 3-year change in IONS shares outstanding?
IONS shares outstanding is up +15.49% over the past 3 years
How far is IONS shares outstanding from its all-time high?
IONS shares outstanding is currently at its all-time high

Data Sources & References

IONS Official Website www.ionis.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/874015/000087401526000115/0000874015-26-000115-index.htm
IONS Profile on Yahoo Finance finance.yahoo.com/quote/IONS
IONS Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/ions