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.

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Historical Stock Price — 2014

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2014-12-31$61.74$61.741,969,600
2014-12-30$61.73$61.731,620,300
2014-12-29$63.14$63.142,014,400
2014-12-26$63.65$63.652,823,500
2014-12-24$59.49$59.492,872,400
2014-12-23$57.61$57.616,691,600
2014-12-22$62.88$62.884,393,600
2014-12-19$65.09$65.0910,086,900
2014-12-18$59.55$59.552,147,500
2014-12-17$57.48$57.482,623,200
2014-12-16$54.94$54.944,134,200
2014-12-15$56.93$56.934,405,600
2014-12-12$62.32$62.323,885,800
2014-12-11$61.87$61.875,506,000
2014-12-10$60.85$60.854,187,300
2014-12-09$57.99$57.992,222,500
2014-12-08$56.99$56.993,430,000
2014-12-05$52.76$52.76898,000
2014-12-04$52.68$52.681,112,800
2014-12-03$53.61$53.611,337,300
2014-12-02$53.04$53.041,364,000
2014-12-01$50.97$50.971,239,200
2014-11-28$51.79$51.79813,500
2014-11-26$52.75$52.75754,800
2014-11-25$51.51$51.511,346,400
2014-11-24$52.42$52.421,225,900
2014-11-21$50.94$50.941,531,000
2014-11-20$51.62$51.621,190,200
2014-11-19$50.06$50.061,534,800
2014-11-18$49.71$49.711,523,500
2014-11-17$49.01$49.011,533,400
2014-11-14$49.01$49.012,758,000
2014-11-13$50.71$50.713,450,100
2014-11-12$51.08$51.085,604,100
2014-11-11$51.39$51.3910,208,800
2014-11-10$47.23$47.232,274,200
2014-11-07$44.59$44.593,400,900
2014-11-06$45.25$45.251,515,300
2014-11-05$44.12$44.121,424,100
2014-11-04$45.60$45.601,145,200
2014-11-03$45.93$45.931,579,400
2014-10-31$46.06$46.062,245,700
2014-10-30$45.88$45.882,083,200
2014-10-29$45.01$45.011,979,500
2014-10-28$46.43$46.432,960,000
2014-10-27$45.86$45.861,919,200
2014-10-24$45.00$45.002,687,200
2014-10-23$42.37$42.372,374,500
2014-10-22$40.48$40.481,553,300
2014-10-21$41.12$41.121,760,200
2014-10-20$41.18$41.181,903,300
2014-10-17$39.87$39.873,780,700
2014-10-16$40.56$40.562,847,400
2014-10-15$38.97$38.972,781,900
2014-10-14$36.84$36.841,745,400
2014-10-13$36.58$36.583,240,800
2014-10-10$36.46$36.464,047,200
2014-10-09$37.25$37.251,572,300
2014-10-08$39.13$39.131,864,200
2014-10-07$37.00$37.001,761,200
2014-10-06$38.41$38.411,142,900
2014-10-03$39.31$39.311,202,800
2014-10-02$38.45$38.451,724,700
2014-10-01$37.86$37.862,535,500
2014-09-30$38.83$38.831,928,800
2014-09-29$40.18$40.181,669,600
2014-09-26$39.93$39.931,629,600
2014-09-25$40.30$40.301,782,500
2014-09-24$41.93$41.931,605,500
2014-09-23$40.17$40.171,840,900
2014-09-22$40.71$40.711,923,300
2014-09-19$42.28$42.283,142,200
2014-09-18$41.88$41.882,648,900
2014-09-17$41.20$41.203,160,700
2014-09-16$39.50$39.501,598,200
2014-09-15$38.84$38.843,560,900
2014-09-12$41.29$41.295,211,700
2014-09-11$40.87$40.872,246,700
2014-09-10$39.74$39.741,743,200
2014-09-09$37.64$37.642,534,600
2014-09-08$38.55$38.55894,200
2014-09-05$38.25$38.252,116,900
2014-09-04$39.08$39.082,049,300
2014-09-03$40.25$40.251,712,500
2014-09-02$40.73$40.732,114,100
2014-08-29$40.76$40.762,018,800
2014-08-28$39.90$39.903,273,900
2014-08-27$39.58$39.583,197,600
2014-08-26$40.01$40.014,938,000
2014-08-25$36.12$36.122,189,000
2014-08-22$34.33$34.331,269,900
2014-08-21$34.17$34.171,237,600
2014-08-20$35.28$35.28923,900
2014-08-19$35.71$35.71969,000
2014-08-18$35.96$35.961,224,100
2014-08-15$36.13$36.131,681,400
2014-08-14$36.58$36.581,661,100
2014-08-13$35.84$35.841,512,500
2014-08-12$34.40$34.401,255,600
2014-08-11$34.79$34.791,562,100
2014-08-08$33.73$33.731,634,900
2014-08-07$32.76$32.761,293,100
2014-08-06$33.02$33.022,017,400
2014-08-05$32.31$32.311,573,500
2014-08-04$31.42$31.421,919,300
2014-08-01$30.40$30.401,445,400
2014-07-31$30.99$30.991,536,000
2014-07-30$31.88$31.881,108,900
2014-07-29$31.62$31.621,489,200
2014-07-28$30.16$30.161,022,900
2014-07-25$30.14$30.14916,800
2014-07-24$30.62$30.621,398,100
2014-07-23$31.39$31.391,981,800
2014-07-22$29.93$29.931,440,800
2014-07-21$28.65$28.651,079,900
2014-07-18$28.74$28.741,555,900
2014-07-17$27.54$27.541,772,400
2014-07-16$28.79$28.791,793,700
2014-07-15$29.07$29.072,034,800
2014-07-14$30.46$30.46821,300
2014-07-11$30.83$30.831,209,800
2014-07-10$30.31$30.311,808,700
2014-07-09$30.91$30.912,062,800
2014-07-08$31.30$31.303,843,400
2014-07-07$33.11$33.112,612,000
2014-07-03$35.49$35.49608,500
2014-07-02$35.35$35.351,266,000
2014-07-01$35.53$35.531,914,800
2014-06-30$34.45$34.452,205,000
2014-06-27$35.44$35.443,346,200
2014-06-26$36.38$36.381,774,300
2014-06-25$36.10$36.102,025,000
2014-06-24$36.23$36.232,079,700
2014-06-23$36.28$36.282,812,700
2014-06-20$36.66$36.664,581,900
2014-06-19$34.82$34.823,694,600
2014-06-18$33.73$33.732,337,400
2014-06-17$34.19$34.193,118,800
2014-06-16$34.78$34.784,735,600
2014-06-13$33.63$33.632,807,400
2014-06-12$32.24$32.241,878,600
2014-06-11$32.90$32.903,587,800
2014-06-10$34.17$34.175,190,500
2014-06-09$31.11$31.112,690,800
2014-06-06$30.40$30.402,188,700
2014-06-05$30.25$30.254,156,500
2014-06-04$27.44$27.442,531,200
2014-06-03$27.77$27.771,900,900
2014-06-02$28.53$28.532,004,000
2014-05-30$29.22$29.222,255,800
2014-05-29$30.25$30.252,556,100
2014-05-28$30.79$30.794,161,500
2014-05-27$30.37$30.375,229,100
2014-05-23$27.81$27.814,585,900
2014-05-22$24.95$24.954,226,700
2014-05-21$23.20$23.202,366,900
2014-05-20$23.58$23.582,244,900
2014-05-19$24.75$24.751,299,300
2014-05-16$24.70$24.702,473,300
2014-05-15$25.53$25.533,234,500
2014-05-14$25.46$25.466,060,400
2014-05-13$25.09$25.093,748,900
2014-05-12$24.51$24.512,388,900
2014-05-09$23.42$23.422,135,200
2014-05-08$22.98$22.982,191,500
2014-05-07$23.93$23.934,068,200
2014-05-06$24.66$24.663,453,500
2014-05-05$25.60$25.602,428,000
2014-05-02$25.87$25.872,777,100
2014-05-01$25.57$25.573,273,500
2014-04-30$26.61$26.6110,152,400
2014-04-29$29.39$29.394,918,400
2014-04-28$31.55$31.553,544,000
2014-04-25$32.74$32.741,701,200
2014-04-24$35.20$35.201,574,800
2014-04-23$35.20$35.201,599,100
2014-04-22$37.00$37.002,158,500
2014-04-21$35.06$35.061,203,100
2014-04-17$34.01$34.011,000,100
2014-04-16$34.57$34.572,556,500
2014-04-15$32.99$32.992,624,900
2014-04-14$33.18$33.182,298,800
2014-04-11$33.90$33.902,554,900
2014-04-10$35.98$35.982,134,000
2014-04-09$39.50$39.502,186,000
2014-04-08$36.67$36.671,675,900
2014-04-07$37.54$37.542,084,400
2014-04-04$37.70$37.702,649,900
2014-04-03$39.57$39.572,441,600
2014-04-02$42.28$42.281,537,800
2014-04-01$43.33$43.331,501,100
2014-03-31$43.21$43.212,318,400
2014-03-28$39.70$39.702,411,500
2014-03-27$42.15$42.152,166,100
2014-03-26$42.07$42.071,753,700
2014-03-25$43.54$43.541,777,500
2014-03-24$42.90$42.902,749,700
2014-03-21$43.94$43.942,312,500
2014-03-20$47.18$47.181,519,200
2014-03-19$47.73$47.731,185,000
2014-03-18$48.76$48.761,695,800
2014-03-17$46.87$46.872,206,000
2014-03-14$45.63$45.633,184,200
2014-03-13$46.05$46.052,875,800
2014-03-12$49.10$49.101,422,500
2014-03-11$49.15$49.151,664,700
2014-03-10$49.51$49.512,390,000
2014-03-07$51.22$51.222,465,200
2014-03-06$52.26$52.262,410,600
2014-03-05$55.89$55.892,361,300
2014-03-04$55.41$55.413,045,000
2014-03-03$50.88$50.881,917,100
2014-02-28$51.00$51.003,847,400
2014-02-27$56.37$56.372,099,500
2014-02-26$56.04$56.041,361,300
2014-02-25$57.96$57.961,070,300
2014-02-24$58.35$58.353,121,200
2014-02-21$59.00$59.006,798,100
2014-02-20$51.07$51.071,309,100
2014-02-19$51.10$51.10810,800
2014-02-18$51.39$51.391,333,200
2014-02-14$52.16$52.162,098,500
2014-02-13$52.03$52.031,055,300
2014-02-12$50.86$50.861,521,900
2014-02-11$50.35$50.35891,000
2014-02-10$49.41$49.41933,400
2014-02-07$49.09$49.091,165,300
2014-02-06$46.49$46.491,228,300
2014-02-05$46.83$46.832,050,500
2014-02-04$49.89$49.891,038,300
2014-02-03$49.09$49.091,847,500
2014-01-31$51.06$51.061,076,500
2014-01-30$49.96$49.961,590,600
2014-01-29$48.86$48.861,050,400
2014-01-28$49.93$49.931,681,900
2014-01-27$47.04$47.041,578,300
2014-01-24$48.42$48.421,129,900
2014-01-23$50.17$50.171,002,000
2014-01-22$50.95$50.952,180,000
2014-01-21$48.00$48.00987,300
2014-01-17$47.14$47.141,089,000
2014-01-16$47.71$47.711,289,300
2014-01-15$47.66$47.661,164,800
2014-01-14$48.71$48.711,081,300
2014-01-13$47.22$47.222,165,800
2014-01-10$47.60$47.602,118,100
2014-01-09$46.15$46.152,187,600
2014-01-08$42.13$42.131,890,200
2014-01-07$39.15$39.15812,600
2014-01-06$38.56$38.561,043,700
2014-01-03$38.98$38.98784,400
2014-01-02$39.87$39.871,038,300