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 — 2022

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2022-12-30$37.77$37.771,275,400
2022-12-29$37.35$37.35682,000
2022-12-28$37.12$37.12782,900
2022-12-27$37.16$37.16856,200
2022-12-23$38.16$38.16875,200
2022-12-22$38.73$38.73683,800
2022-12-21$38.82$38.821,281,000
2022-12-20$38.92$38.921,192,800
2022-12-19$37.96$37.961,692,400
2022-12-16$38.66$38.661,901,900
2022-12-15$38.20$38.201,110,100
2022-12-14$38.30$38.301,050,800
2022-12-13$38.13$38.13741,800
2022-12-12$38.26$38.261,039,600
2022-12-09$37.50$37.50780,500
2022-12-08$38.00$38.001,066,200
2022-12-07$38.20$38.201,148,100
2022-12-06$38.03$38.031,227,300
2022-12-05$38.98$38.981,475,600
2022-12-02$40.32$40.321,296,500
2022-12-01$40.20$40.20966,500
2022-11-30$40.79$40.791,571,700
2022-11-29$38.76$38.761,015,400
2022-11-28$40.33$40.33871,700
2022-11-25$41.56$41.56465,300
2022-11-23$41.25$41.251,981,500
2022-11-22$42.20$42.20922,100
2022-11-21$42.46$42.46534,600
2022-11-18$43.09$43.09690,800
2022-11-17$43.04$43.04576,600
2022-11-16$42.69$42.69873,000
2022-11-15$43.52$43.521,023,300
2022-11-14$44.04$44.041,020,800
2022-11-11$43.25$43.251,126,700
2022-11-10$45.47$45.471,389,900
2022-11-09$43.06$43.06903,600
2022-11-08$42.25$42.251,150,000
2022-11-07$41.61$41.61927,300
2022-11-04$41.55$41.551,892,200
2022-11-03$44.49$44.491,020,000
2022-11-02$44.68$44.68636,300
2022-11-01$44.83$44.83596,500
2022-10-31$44.20$44.20608,200
2022-10-28$44.61$44.61900,300
2022-10-27$43.51$43.51744,100
2022-10-26$44.35$44.35703,000
2022-10-25$44.32$44.321,113,400
2022-10-24$44.75$44.751,000,700
2022-10-21$44.95$44.951,125,400
2022-10-20$44.83$44.83617,700
2022-10-19$44.47$44.47796,600
2022-10-18$46.20$46.201,172,700
2022-10-17$46.52$46.522,696,600
2022-10-14$46.36$46.361,013,200
2022-10-13$45.67$45.67543,800
2022-10-12$46.02$46.02608,400
2022-10-11$45.56$45.56848,900
2022-10-10$45.10$45.10823,500
2022-10-07$45.93$45.931,047,500
2022-10-06$45.60$45.60550,100
2022-10-05$45.98$45.981,228,500
2022-10-04$46.19$46.191,124,100
2022-10-03$44.99$44.991,131,100
2022-09-30$44.23$44.23951,500
2022-09-29$44.28$44.281,520,400
2022-09-28$44.42$44.421,382,700
2022-09-27$42.27$42.271,182,200
2022-09-26$41.75$41.751,325,900
2022-09-23$43.23$43.231,665,800
2022-09-22$44.97$44.97762,100
2022-09-21$45.07$45.07803,000
2022-09-20$46.50$46.501,737,300
2022-09-19$46.74$46.74851,800
2022-09-16$46.33$46.331,716,300
2022-09-15$47.49$47.491,044,000
2022-09-14$47.41$47.411,352,500
2022-09-13$46.25$46.251,508,400
2022-09-12$48.66$48.661,456,100
2022-09-09$46.84$46.841,593,400
2022-09-08$44.27$44.27920,600
2022-09-07$43.45$43.451,137,500
2022-09-06$41.65$41.65857,500
2022-09-02$43.24$43.24735,000
2022-09-01$43.46$43.46803,900
2022-08-31$42.52$42.52980,300
2022-08-30$41.83$41.83734,200
2022-08-29$42.00$42.00614,900
2022-08-26$42.35$42.35884,400
2022-08-25$43.95$43.95615,800
2022-08-24$44.75$44.75756,300
2022-08-23$43.86$43.86519,400
2022-08-22$44.02$44.02609,700
2022-08-19$44.00$44.00520,400
2022-08-18$44.04$44.04504,000
2022-08-17$43.88$43.88722,700
2022-08-16$44.32$44.32635,500
2022-08-15$44.41$44.41671,200
2022-08-12$44.10$44.10841,400
2022-08-11$43.44$43.441,109,000
2022-08-10$46.11$46.111,057,400
2022-08-09$44.26$44.261,127,300
2022-08-08$45.71$45.711,940,500
2022-08-05$45.70$45.701,506,600
2022-08-04$43.29$43.291,474,800
2022-08-03$41.02$41.022,484,500
2022-08-02$37.18$37.18374,500
2022-08-01$37.49$37.49502,200
2022-07-29$37.56$37.56595,600
2022-07-28$38.99$38.99569,100
2022-07-27$38.64$38.64547,200
2022-07-26$38.05$38.05726,700
2022-07-25$38.32$38.32635,300
2022-07-22$38.10$38.10837,500
2022-07-21$39.00$39.00595,000
2022-07-20$39.01$39.01669,100
2022-07-19$39.28$39.28624,600
2022-07-18$38.74$38.74765,800
2022-07-15$39.31$39.311,207,700
2022-07-14$37.11$37.11570,100
2022-07-13$37.65$37.65902,100
2022-07-12$37.00$37.00877,900
2022-07-11$36.54$36.54794,500
2022-07-08$37.15$37.15919,400
2022-07-07$36.77$36.771,078,900
2022-07-06$36.81$36.811,307,000
2022-07-05$37.85$37.851,264,500
2022-07-01$38.06$38.06770,100
2022-06-30$37.02$37.02774,300
2022-06-29$37.56$37.56754,100
2022-06-28$37.97$37.97718,700
2022-06-27$39.34$39.34823,800
2022-06-24$39.25$39.251,498,900
2022-06-23$39.02$39.02918,700
2022-06-22$37.24$37.24937,700
2022-06-21$37.41$37.411,246,500
2022-06-17$35.26$35.261,396,800
2022-06-16$33.73$33.73704,500
2022-06-15$34.67$34.67620,900
2022-06-14$33.51$33.51984,100
2022-06-13$33.50$33.501,267,600
2022-06-10$34.76$34.76970,700
2022-06-09$34.93$34.931,035,300
2022-06-08$35.00$35.00952,000
2022-06-07$35.03$35.03653,500
2022-06-06$34.02$34.02863,800
2022-06-03$36.15$36.15749,800
2022-06-02$35.86$35.86677,900
2022-06-01$35.91$35.91854,400
2022-05-31$36.52$36.521,026,700
2022-05-27$37.63$37.631,619,600
2022-05-26$36.65$36.651,619,300
2022-05-25$36.86$36.861,603,900
2022-05-24$37.11$37.111,089,500
2022-05-23$39.47$39.471,328,900
2022-05-20$39.49$39.49767,200
2022-05-19$39.13$39.131,163,400
2022-05-18$38.39$38.391,150,500
2022-05-17$38.75$38.751,130,300
2022-05-16$36.60$36.60592,800
2022-05-13$36.08$36.08910,700
2022-05-12$35.12$35.121,468,000
2022-05-11$33.03$33.031,609,900
2022-05-10$34.15$34.151,760,300
2022-05-09$31.71$31.711,635,300
2022-05-06$36.30$36.30942,700
2022-05-05$38.05$38.05914,900
2022-05-04$39.58$39.58809,200
2022-05-03$38.50$38.50741,600
2022-05-02$38.37$38.371,083,500
2022-04-29$36.76$36.761,715,900
2022-04-28$39.55$39.55788,500
2022-04-27$39.86$39.86735,500
2022-04-26$40.12$40.12854,600
2022-04-25$42.34$42.34824,400
2022-04-22$41.73$41.731,273,000
2022-04-21$43.00$43.002,574,100
2022-04-20$43.00$43.001,316,100
2022-04-19$40.96$40.96778,600
2022-04-18$41.01$41.011,217,500
2022-04-14$40.97$40.971,593,700
2022-04-13$40.64$40.641,023,500
2022-04-12$39.63$39.631,144,600
2022-04-11$39.61$39.611,197,900
2022-04-08$40.12$40.121,465,800
2022-04-07$39.33$39.33702,500
2022-04-06$38.75$38.751,244,200
2022-04-05$38.27$38.271,431,600
2022-04-04$38.73$38.731,283,800
2022-04-01$38.90$38.901,117,700
2022-03-31$37.04$37.041,827,100
2022-03-30$35.69$35.69697,500
2022-03-29$36.48$36.48810,900
2022-03-28$35.88$35.88792,900
2022-03-25$36.67$36.67691,700
2022-03-24$36.92$36.92771,200
2022-03-23$35.67$35.67706,000
2022-03-22$36.28$36.28844,600
2022-03-21$34.92$34.92657,500
2022-03-18$35.25$35.251,975,500
2022-03-17$34.76$34.76736,700
2022-03-16$33.98$33.98825,800
2022-03-15$32.70$32.70706,500
2022-03-14$32.68$32.681,026,600
2022-03-11$32.19$32.19815,100
2022-03-10$33.17$33.17948,000
2022-03-09$33.33$33.33810,900
2022-03-08$32.35$32.35741,700
2022-03-07$32.17$32.171,501,600
2022-03-04$32.30$32.30595,000
2022-03-03$33.24$33.24738,500
2022-03-02$33.15$33.15730,300
2022-03-01$34.08$34.08862,500
2022-02-28$33.38$33.381,156,200
2022-02-25$31.78$31.78908,100
2022-02-24$32.49$32.491,496,800
2022-02-23$30.73$30.731,797,700
2022-02-22$31.34$31.341,482,000
2022-02-18$32.27$32.27736,200
2022-02-17$32.74$32.74983,600
2022-02-16$33.40$33.40515,100
2022-02-15$33.66$33.66800,000
2022-02-14$32.59$32.592,903,700
2022-02-11$32.88$32.88754,800
2022-02-10$33.54$33.541,024,600
2022-02-09$34.02$34.021,070,900
2022-02-08$32.68$32.681,059,200
2022-02-07$32.46$32.46802,800
2022-02-04$31.50$31.50844,300
2022-02-03$31.07$31.071,002,300
2022-02-02$31.50$31.501,102,300
2022-02-01$31.51$31.511,664,200
2022-01-31$31.80$31.803,318,200
2022-01-28$31.68$31.68835,800
2022-01-27$30.14$30.141,050,000
2022-01-26$31.44$31.441,527,400
2022-01-25$31.48$31.481,366,200
2022-01-24$31.40$31.401,682,800
2022-01-21$29.88$29.881,605,300
2022-01-20$30.01$30.012,009,900
2022-01-19$30.32$30.321,524,600
2022-01-18$30.12$30.122,020,800
2022-01-14$33.08$33.081,274,300
2022-01-13$32.13$32.131,226,200
2022-01-12$31.85$31.851,137,100
2022-01-11$31.35$31.35914,500
2022-01-10$30.51$30.511,197,400
2022-01-07$30.38$30.38965,600
2022-01-06$30.94$30.94837,400
2022-01-05$30.45$30.45815,400
2022-01-04$31.36$31.36945,800
2022-01-03$32.60$32.601,162,900