NASDAQ:IONS | Historical Stock Price | IONIS PHARMACEUTICALS INC

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1991-05-17 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$2.77$5.54$11.08$22.15$44.28$88.501991-05-172026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

View year

Historical Stock Price — 2016

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2016-12-30$47.83$47.831,780,100
2016-12-29$48.62$48.622,566,100
2016-12-28$51.54$51.542,478,400
2016-12-27$55.12$55.123,734,900
2016-12-23$53.41$53.411,488,400
2016-12-22$51.59$51.591,486,700
2016-12-21$52.15$52.152,699,800
2016-12-20$51.92$51.923,076,200
2016-12-19$49.17$49.172,403,900
2016-12-16$49.30$49.303,771,600
2016-12-15$49.65$49.652,955,700
2016-12-14$47.32$47.321,922,100
2016-12-13$46.27$46.271,431,900
2016-12-12$45.10$45.101,448,300
2016-12-09$45.57$45.571,227,600
2016-12-08$46.56$46.561,611,600
2016-12-07$46.00$46.002,593,400
2016-12-06$47.45$47.451,690,500
2016-12-05$46.00$46.002,650,700
2016-12-02$43.00$43.001,793,700
2016-12-01$41.33$41.332,118,900
2016-11-30$43.76$43.761,788,500
2016-11-29$46.27$46.271,379,200
2016-11-28$45.75$45.751,375,400
2016-11-25$46.01$46.01510,200
2016-11-23$45.39$45.391,267,400
2016-11-22$43.61$43.611,731,100
2016-11-21$45.77$45.771,295,700
2016-11-18$45.12$45.121,628,200
2016-11-17$46.40$46.401,884,800
2016-11-16$45.57$45.572,725,100
2016-11-15$48.16$48.162,521,600
2016-11-14$47.49$47.494,289,400
2016-11-11$42.57$42.572,375,300
2016-11-10$40.95$40.958,026,000
2016-11-09$38.38$38.3811,199,200
2016-11-08$31.46$31.464,427,700
2016-11-07$32.12$32.1211,749,200
2016-11-04$27.13$27.133,064,700
2016-11-03$27.00$27.002,997,900
2016-11-02$27.00$27.004,769,500
2016-11-01$27.32$27.322,050,600
2016-10-31$25.98$25.981,569,900
2016-10-28$26.09$26.091,806,600
2016-10-27$25.69$25.692,314,100
2016-10-26$27.22$27.221,365,300
2016-10-25$27.16$27.161,526,200
2016-10-24$27.65$27.651,082,700
2016-10-21$28.07$28.07921,500
2016-10-20$28.59$28.591,176,200
2016-10-19$27.82$27.821,061,200
2016-10-18$28.62$28.621,154,700
2016-10-17$28.87$28.871,254,800
2016-10-14$29.00$29.002,126,100
2016-10-13$30.10$30.101,897,700
2016-10-12$30.65$30.651,526,500
2016-10-11$32.33$32.331,456,700
2016-10-10$34.32$34.321,115,600
2016-10-07$34.26$34.261,836,300
2016-10-06$34.26$34.263,270,800
2016-10-05$36.38$36.381,367,900
2016-10-04$35.66$35.66937,400
2016-10-03$36.03$36.031,187,100
2016-09-30$36.64$36.641,717,500
2016-09-29$35.57$35.571,246,100
2016-09-28$36.20$36.201,499,500
2016-09-27$36.72$36.721,650,100
2016-09-26$34.88$34.881,166,000
2016-09-23$35.12$35.121,581,600
2016-09-22$35.02$35.021,846,300
2016-09-21$35.38$35.383,099,900
2016-09-20$34.01$34.012,735,300
2016-09-19$31.64$31.641,259,400
2016-09-16$31.75$31.752,321,300
2016-09-15$30.86$30.861,410,000
2016-09-14$30.46$30.461,102,900
2016-09-13$29.42$29.421,222,100
2016-09-12$30.02$30.021,253,200
2016-09-09$29.01$29.011,691,100
2016-09-08$30.83$30.832,286,600
2016-09-07$30.11$30.112,048,800
2016-09-06$29.37$29.371,646,900
2016-09-02$29.46$29.461,602,100
2016-09-01$30.04$30.041,621,200
2016-08-31$29.65$29.655,770,700
2016-08-30$29.69$29.691,567,600
2016-08-29$30.32$30.321,429,300
2016-08-26$30.90$30.901,873,700
2016-08-25$30.37$30.372,868,200
2016-08-24$31.64$31.642,837,200
2016-08-23$33.71$33.711,065,700
2016-08-22$33.87$33.871,879,900
2016-08-19$33.39$33.391,431,300
2016-08-18$34.47$34.471,115,300
2016-08-17$34.34$34.341,811,200
2016-08-16$33.96$33.961,644,700
2016-08-15$35.45$35.451,608,700
2016-08-12$35.03$35.032,412,400
2016-08-11$35.90$35.901,588,400
2016-08-10$35.96$35.961,649,500
2016-08-09$36.33$36.332,087,700
2016-08-08$35.91$35.912,064,100
2016-08-05$36.12$36.122,809,000
2016-08-04$36.63$36.631,882,600
2016-08-03$37.73$37.732,481,900
2016-08-02$37.74$37.7411,366,800
2016-08-01$38.01$38.0121,091,000
2016-07-29$29.19$29.19873,600
2016-07-28$28.84$28.84810,400
2016-07-27$29.18$29.181,246,900
2016-07-26$28.19$28.191,184,100
2016-07-25$28.38$28.381,264,400
2016-07-22$27.84$27.841,644,500
2016-07-21$27.75$27.751,858,800
2016-07-20$27.28$27.281,921,200
2016-07-19$26.66$26.662,417,900
2016-07-18$27.69$27.693,341,500
2016-07-15$27.28$27.285,538,200
2016-07-14$24.52$24.522,324,700
2016-07-13$24.68$24.681,902,100
2016-07-12$25.49$25.491,500,700
2016-07-11$25.28$25.281,526,900
2016-07-08$25.36$25.361,119,800
2016-07-07$25.14$25.141,407,200
2016-07-06$25.08$25.081,806,400
2016-07-05$24.48$24.481,468,800
2016-07-01$24.42$24.421,928,700
2016-06-30$23.29$23.292,026,900
2016-06-29$23.15$23.151,695,800
2016-06-28$22.49$22.492,376,800
2016-06-27$20.62$20.622,240,200
2016-06-24$21.97$21.972,528,100
2016-06-23$23.60$23.601,453,200
2016-06-22$22.59$22.591,924,000
2016-06-21$22.41$22.411,908,000
2016-06-20$23.04$23.041,654,400
2016-06-17$22.46$22.463,657,700
2016-06-16$23.32$23.321,729,600
2016-06-15$22.86$22.862,155,600
2016-06-14$22.35$22.353,037,500
2016-06-13$21.47$21.472,275,000
2016-06-10$21.75$21.752,656,700
2016-06-09$21.45$21.453,042,800
2016-06-08$21.57$21.573,431,600
2016-06-07$22.33$22.333,418,400
2016-06-06$24.29$24.293,257,100
2016-06-03$22.96$22.963,571,200
2016-06-02$23.75$23.753,112,500
2016-06-01$22.52$22.523,429,600
2016-05-31$22.69$22.695,906,800
2016-05-27$22.01$22.019,167,100
2016-05-26$21.36$21.3627,202,800
2016-05-25$35.26$35.262,051,100
2016-05-24$33.37$33.371,969,700
2016-05-23$34.08$34.081,366,900
2016-05-20$33.59$33.591,209,900
2016-05-19$32.79$32.79950,800
2016-05-18$33.49$33.491,191,200
2016-05-17$32.59$32.591,308,500
2016-05-16$32.63$32.631,771,800
2016-05-13$31.42$31.421,188,800
2016-05-12$30.49$30.492,462,100
2016-05-11$32.93$32.931,583,200
2016-05-10$34.11$34.111,478,300
2016-05-09$34.38$34.381,349,300
2016-05-06$34.01$34.011,248,900
2016-05-05$34.91$34.912,104,400
2016-05-04$35.25$35.252,952,000
2016-05-03$38.22$38.221,272,400
2016-05-02$40.40$40.401,342,600
2016-04-29$40.97$40.971,175,200
2016-04-28$40.99$40.99862,400
2016-04-27$41.37$41.371,001,700
2016-04-26$42.00$42.001,760,000
2016-04-25$43.08$43.08921,600
2016-04-22$43.44$43.44798,700
2016-04-21$43.78$43.781,538,400
2016-04-20$43.62$43.621,273,900
2016-04-19$42.51$42.51842,400
2016-04-18$43.32$43.32748,100
2016-04-15$42.48$42.48972,700
2016-04-14$42.70$42.70826,100
2016-04-13$42.61$42.611,473,800
2016-04-12$40.57$40.571,368,200
2016-04-11$40.67$40.671,333,700
2016-04-08$40.39$40.391,602,100
2016-04-07$41.40$41.406,474,300
2016-04-06$46.53$46.532,214,000
2016-04-05$42.56$42.561,824,600
2016-04-04$42.26$42.261,782,500
2016-04-01$41.02$41.021,745,100
2016-03-31$40.50$40.501,559,500
2016-03-30$38.63$38.632,231,300
2016-03-29$38.96$38.962,331,100
2016-03-28$38.31$38.312,414,900
2016-03-24$41.62$41.622,057,300
2016-03-23$39.80$39.805,174,800
2016-03-22$41.75$41.751,481,200
2016-03-21$40.63$40.631,773,300
2016-03-18$38.65$38.652,890,900
2016-03-17$36.94$36.942,157,200
2016-03-16$36.88$36.881,579,900
2016-03-15$36.51$36.512,039,800
2016-03-14$40.34$40.341,461,900
2016-03-11$39.07$39.071,140,200
2016-03-10$37.08$37.081,463,400
2016-03-09$38.00$38.001,615,100
2016-03-08$39.29$39.291,476,300
2016-03-07$41.49$41.491,402,000
2016-03-04$39.81$39.811,991,000
2016-03-03$38.41$38.411,695,200
2016-03-02$37.75$37.752,031,200
2016-03-01$35.93$35.931,710,800
2016-02-29$34.56$34.561,718,100
2016-02-26$33.50$33.501,981,500
2016-02-25$33.57$33.572,498,100
2016-02-24$35.13$35.133,885,800
2016-02-23$34.85$34.851,314,100
2016-02-22$36.80$36.801,199,900
2016-02-19$37.00$37.001,274,300
2016-02-18$36.99$36.991,670,500
2016-02-17$38.74$38.742,252,000
2016-02-16$36.04$36.041,904,000
2016-02-12$35.74$35.742,801,100
2016-02-11$34.25$34.252,885,200
2016-02-10$33.03$33.031,528,900
2016-02-09$33.17$33.172,477,900
2016-02-08$32.85$32.851,978,100
2016-02-05$35.39$35.392,397,400
2016-02-04$35.56$35.562,037,100
2016-02-03$35.49$35.492,262,000
2016-02-02$35.61$35.612,133,400
2016-02-01$39.28$39.281,797,500
2016-01-29$38.93$38.932,520,600
2016-01-28$39.73$39.732,184,900
2016-01-27$42.49$42.491,999,400
2016-01-26$46.39$46.391,507,700
2016-01-25$46.19$46.191,521,100
2016-01-22$45.47$45.471,463,000
2016-01-21$43.14$43.141,794,800
2016-01-20$42.83$42.832,615,600
2016-01-19$40.63$40.632,301,600
2016-01-15$43.88$43.883,479,500
2016-01-14$47.91$47.911,913,800
2016-01-13$43.78$43.782,026,400
2016-01-12$48.57$48.573,941,800
2016-01-11$50.19$50.192,403,800
2016-01-08$56.88$56.881,580,200
2016-01-07$55.43$55.431,502,300
2016-01-06$58.72$58.723,255,800
2016-01-05$60.94$60.941,580,000
2016-01-04$61.68$61.681,350,800