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 — 2013

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2013-12-31$39.84$39.84839,400
2013-12-30$39.94$39.94433,700
2013-12-27$40.13$40.13501,500
2013-12-26$40.97$40.97575,500
2013-12-24$40.74$40.74468,200
2013-12-23$41.68$41.68846,900
2013-12-20$41.43$41.432,736,700
2013-12-19$38.93$38.93754,600
2013-12-18$39.07$39.071,210,100
2013-12-17$37.72$37.72913,200
2013-12-16$37.86$37.861,516,500
2013-12-13$37.14$37.141,585,000
2013-12-12$38.13$38.13858,600
2013-12-11$36.65$36.651,153,700
2013-12-10$37.76$37.76684,000
2013-12-09$38.40$38.40819,400
2013-12-06$39.12$39.121,183,800
2013-12-05$39.25$39.251,370,200
2013-12-04$38.64$38.641,123,700
2013-12-03$38.09$38.091,188,300
2013-12-02$38.42$38.421,111,700
2013-11-29$38.76$38.76702,800
2013-11-27$39.28$39.281,453,700
2013-11-26$38.14$38.141,574,600
2013-11-25$36.55$36.551,757,700
2013-11-22$36.18$36.181,959,100
2013-11-21$33.43$33.43934,500
2013-11-20$31.79$31.79826,200
2013-11-19$31.79$31.791,598,200
2013-11-18$30.44$30.441,321,600
2013-11-15$32.15$32.15864,200
2013-11-14$32.21$32.21561,600
2013-11-13$32.70$32.70553,400
2013-11-12$32.56$32.56858,600
2013-11-11$33.59$33.59853,500
2013-11-08$32.79$32.792,261,400
2013-11-07$31.06$31.06908,300
2013-11-06$31.46$31.461,152,500
2013-11-05$32.55$32.551,444,100
2013-11-04$33.49$33.49946,000
2013-11-01$33.11$33.111,143,500
2013-10-31$33.27$33.271,142,500
2013-10-30$34.22$34.22793,100
2013-10-29$35.94$35.94513,500
2013-10-28$35.51$35.51618,200
2013-10-25$35.44$35.441,039,200
2013-10-24$35.67$35.671,310,500
2013-10-23$33.85$33.851,003,600
2013-10-22$34.15$34.151,748,900
2013-10-21$32.08$32.08928,200
2013-10-18$32.68$32.681,248,900
2013-10-17$33.35$33.351,657,000
2013-10-16$34.17$34.171,557,800
2013-10-15$32.41$32.412,167,500
2013-10-14$33.08$33.081,427,200
2013-10-11$32.54$32.541,182,200
2013-10-10$33.39$33.391,663,300
2013-10-09$32.24$32.243,224,400
2013-10-08$31.37$31.372,320,100
2013-10-07$34.01$34.011,621,000
2013-10-04$36.07$36.071,123,300
2013-10-03$35.83$35.831,787,200
2013-10-02$37.11$37.111,138,100
2013-10-01$37.89$37.891,140,800
2013-09-30$37.54$37.541,049,400
2013-09-27$38.36$38.361,017,900
2013-09-26$38.04$38.04969,800
2013-09-25$37.53$37.53963,500
2013-09-24$37.65$37.651,742,800
2013-09-23$38.48$38.484,140,100
2013-09-20$36.06$36.063,635,200
2013-09-19$36.27$36.275,033,500
2013-09-18$31.80$31.80953,100
2013-09-17$31.86$31.861,026,300
2013-09-16$31.18$31.181,290,000
2013-09-13$31.52$31.52791,300
2013-09-12$31.10$31.10627,800
2013-09-11$31.33$31.33905,200
2013-09-10$31.62$31.621,913,600
2013-09-09$31.81$31.814,547,400
2013-09-06$27.92$27.92703,300
2013-09-05$28.47$28.471,525,600
2013-09-04$29.13$29.132,542,200
2013-09-03$26.80$26.802,701,800
2013-08-30$25.83$25.831,081,900
2013-08-29$25.91$25.911,037,600
2013-08-28$25.26$25.261,212,100
2013-08-27$24.16$24.161,439,200
2013-08-26$25.58$25.581,224,400
2013-08-23$25.64$25.64607,700
2013-08-22$25.71$25.71625,700
2013-08-21$25.38$25.38899,400
2013-08-20$25.86$25.86820,400
2013-08-19$25.26$25.261,304,700
2013-08-16$25.17$25.171,130,500
2013-08-15$25.97$25.971,204,300
2013-08-14$26.34$26.34592,200
2013-08-13$26.49$26.491,555,900
2013-08-12$27.15$27.152,098,600
2013-08-09$28.21$28.21719,600
2013-08-08$28.11$28.111,828,700
2013-08-07$27.45$27.451,233,300
2013-08-06$27.75$27.751,156,300
2013-08-05$28.65$28.651,194,500
2013-08-02$29.23$29.23774,300
2013-08-01$29.29$29.29859,400
2013-07-31$28.85$28.851,090,300
2013-07-30$28.36$28.36942,300
2013-07-29$27.79$27.791,084,100
2013-07-26$28.97$28.97677,700
2013-07-25$29.27$29.271,419,600
2013-07-24$28.51$28.512,344,800
2013-07-23$29.12$29.121,726,400
2013-07-22$30.92$30.922,608,700
2013-07-19$31.05$31.051,089,100
2013-07-18$30.34$30.341,960,600
2013-07-17$31.30$31.301,222,500
2013-07-16$31.34$31.341,874,900
2013-07-15$33.55$33.551,448,300
2013-07-12$33.72$33.721,589,200
2013-07-11$32.70$32.701,932,400
2013-07-10$31.70$31.701,714,000
2013-07-09$29.88$29.88885,200
2013-07-08$30.07$30.071,143,500
2013-07-05$30.00$30.001,237,900
2013-07-03$28.50$28.501,278,600
2013-07-02$28.47$28.471,176,000
2013-07-01$28.47$28.471,693,500
2013-06-28$26.87$26.871,763,900
2013-06-27$27.15$27.151,910,700
2013-06-26$28.07$28.072,574,300
2013-06-25$26.66$26.664,389,300
2013-06-24$28.42$28.429,782,300
2013-06-21$21.99$21.992,751,000
2013-06-20$20.75$20.751,427,400
2013-06-19$22.58$22.58578,100
2013-06-18$23.08$23.08495,000
2013-06-17$22.76$22.76493,800
2013-06-14$23.00$23.00699,600
2013-06-13$23.63$23.63710,500
2013-06-12$22.89$22.89920,600
2013-06-11$23.65$23.651,526,700
2013-06-10$22.99$22.99866,100
2013-06-07$22.76$22.761,268,500
2013-06-06$21.67$21.67815,800
2013-06-05$20.91$20.91946,400
2013-06-04$21.23$21.231,389,800
2013-06-03$21.38$21.381,718,400
2013-05-31$21.69$21.692,346,100
2013-05-30$21.79$21.79967,900
2013-05-29$21.91$21.911,065,600
2013-05-28$21.76$21.761,046,600
2013-05-24$20.98$20.98878,100
2013-05-23$20.64$20.641,105,400
2013-05-22$20.39$20.391,415,100
2013-05-21$20.81$20.81906,600
2013-05-20$20.46$20.461,128,600
2013-05-17$20.66$20.661,729,900
2013-05-16$20.16$20.161,561,500
2013-05-15$20.67$20.671,869,600
2013-05-14$20.24$20.241,640,900
2013-05-13$19.39$19.391,971,800
2013-05-10$19.02$19.021,894,700
2013-05-09$18.49$18.498,076,300
2013-05-08$19.65$19.653,238,100
2013-05-07$21.89$21.891,288,800
2013-05-06$22.42$22.42892,500
2013-05-03$22.42$22.42933,300
2013-05-02$22.39$22.391,208,000
2013-05-01$21.51$21.511,570,700
2013-04-30$22.39$22.392,299,200
2013-04-29$22.61$22.61792,400
2013-04-26$22.48$22.481,006,400
2013-04-25$22.44$22.441,262,200
2013-04-24$22.34$22.341,505,600
2013-04-23$22.16$22.161,918,600
2013-04-22$21.81$21.812,312,700
2013-04-19$21.10$21.103,791,400
2013-04-18$19.41$19.411,069,400
2013-04-17$19.18$19.181,401,500
2013-04-16$19.06$19.061,323,800
2013-04-15$18.38$18.381,330,600
2013-04-12$19.19$19.19944,900
2013-04-11$19.21$19.211,743,900
2013-04-10$18.30$18.301,124,600
2013-04-09$17.54$17.54544,200
2013-04-08$17.37$17.371,386,200
2013-04-05$17.34$17.341,438,500
2013-04-04$16.79$16.791,244,300
2013-04-03$16.29$16.291,370,500
2013-04-02$16.77$16.771,182,800
2013-04-01$17.02$17.02876,400
2013-03-28$16.94$16.941,475,600
2013-03-27$17.35$17.351,135,000
2013-03-26$16.82$16.821,148,800
2013-03-25$17.00$17.001,193,500
2013-03-22$16.83$16.832,743,500
2013-03-21$17.97$17.974,137,400
2013-03-20$17.84$17.841,707,500
2013-03-19$17.56$17.56913,600
2013-03-18$17.63$17.631,070,100
2013-03-15$17.66$17.663,261,800
2013-03-14$17.74$17.74956,700
2013-03-13$17.66$17.661,724,600
2013-03-12$17.94$17.941,213,400
2013-03-11$17.70$17.701,099,100
2013-03-08$17.70$17.701,938,100
2013-03-07$17.67$17.671,458,500
2013-03-06$17.37$17.371,360,900
2013-03-05$17.15$17.152,413,500
2013-03-04$16.58$16.582,973,100
2013-03-01$15.31$15.311,449,300
2013-02-28$14.70$14.70858,900
2013-02-27$14.23$14.23581,600
2013-02-26$14.02$14.02986,000
2013-02-25$14.01$14.01750,200
2013-02-22$14.61$14.61626,800
2013-02-21$14.13$14.13871,200
2013-02-20$14.60$14.601,387,400
2013-02-19$14.95$14.95801,800
2013-02-15$14.43$14.43989,700
2013-02-14$14.43$14.43889,500
2013-02-13$14.22$14.22742,600
2013-02-12$14.06$14.06885,500
2013-02-11$14.25$14.251,202,900
2013-02-08$14.24$14.241,245,600
2013-02-07$14.39$14.39981,700
2013-02-06$14.67$14.67745,700
2013-02-05$14.74$14.74646,200
2013-02-04$14.46$14.461,341,600
2013-02-01$14.73$14.731,557,700
2013-01-31$14.53$14.531,817,000
2013-01-30$14.69$14.698,881,500
2013-01-29$13.38$13.381,339,100
2013-01-28$13.49$13.491,411,700
2013-01-25$13.65$13.65995,100
2013-01-24$13.56$13.561,921,800
2013-01-23$13.46$13.463,074,400
2013-01-22$13.98$13.981,940,600
2013-01-18$14.36$14.361,353,400
2013-01-17$14.17$14.171,517,500
2013-01-16$14.04$14.041,295,300
2013-01-15$14.08$14.082,190,100
2013-01-14$13.69$13.692,144,000
2013-01-11$13.28$13.282,210,100
2013-01-10$13.22$13.223,784,600
2013-01-09$11.99$11.992,004,700
2013-01-08$11.92$11.922,929,600
2013-01-07$10.64$10.64762,800
2013-01-04$10.89$10.891,163,900
2013-01-03$10.49$10.491,123,600
2013-01-02$10.82$10.821,395,700