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 — 2010

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2010-12-31$10.12$10.12340,300
2010-12-30$10.15$10.15512,300
2010-12-29$10.32$10.32515,600
2010-12-28$10.33$10.33428,100
2010-12-27$10.50$10.50238,800
2010-12-23$10.46$10.46373,700
2010-12-22$10.51$10.51646,700
2010-12-21$10.32$10.32389,900
2010-12-20$10.25$10.25369,600
2010-12-17$10.26$10.261,133,300
2010-12-16$10.27$10.27787,900
2010-12-15$9.94$9.94518,700
2010-12-14$9.81$9.81592,400
2010-12-13$9.64$9.64698,100
2010-12-10$9.63$9.63449,200
2010-12-09$9.49$9.49406,100
2010-12-08$9.51$9.51519,000
2010-12-07$9.61$9.61633,500
2010-12-06$9.51$9.51366,800
2010-12-03$9.52$9.52451,900
2010-12-02$9.60$9.60437,600
2010-12-01$9.64$9.64483,000
2010-11-30$9.44$9.44608,300
2010-11-29$9.61$9.61519,900
2010-11-26$9.66$9.66106,300
2010-11-24$9.74$9.74370,600
2010-11-23$9.48$9.48908,800
2010-11-22$9.60$9.60630,400
2010-11-19$9.69$9.69456,100
2010-11-18$9.71$9.71764,100
2010-11-17$9.80$9.80567,900
2010-11-16$9.81$9.811,240,800
2010-11-15$9.95$9.95849,400
2010-11-12$9.78$9.78917,000
2010-11-11$9.80$9.80981,200
2010-11-10$9.84$9.841,033,400
2010-11-09$9.70$9.701,051,900
2010-11-08$9.70$9.701,105,100
2010-11-05$9.90$9.901,673,100
2010-11-04$9.46$9.46969,100
2010-11-03$9.19$9.19559,700
2010-11-02$9.10$9.101,055,400
2010-11-01$9.01$9.01728,600
2010-10-29$9.14$9.14488,200
2010-10-28$9.02$9.02428,200
2010-10-27$9.07$9.07876,100
2010-10-26$8.92$8.921,143,900
2010-10-25$9.03$9.031,405,300
2010-10-22$9.22$9.221,973,700
2010-10-21$9.04$9.041,083,500
2010-10-20$9.40$9.401,325,600
2010-10-19$9.38$9.381,742,100
2010-10-18$9.46$9.461,464,700
2010-10-15$9.12$9.121,557,100
2010-10-14$8.82$8.821,184,600
2010-10-13$8.43$8.43883,100
2010-10-12$8.48$8.48757,800
2010-10-11$8.56$8.562,073,600
2010-10-08$8.63$8.63627,700
2010-10-07$8.45$8.45746,700
2010-10-06$8.29$8.29663,500
2010-10-05$8.14$8.14884,700
2010-10-04$8.05$8.051,447,100
2010-10-01$8.27$8.27601,600
2010-09-30$8.40$8.401,380,400
2010-09-29$8.18$8.181,272,000
2010-09-28$8.32$8.32805,100
2010-09-27$8.36$8.36605,700
2010-09-24$8.65$8.65559,400
2010-09-23$8.49$8.49409,600
2010-09-22$8.57$8.57583,400
2010-09-21$8.81$8.81919,500
2010-09-20$8.65$8.65783,700
2010-09-17$8.26$8.261,888,000
2010-09-16$8.28$8.28515,200
2010-09-15$8.25$8.25492,800
2010-09-14$8.23$8.23469,800
2010-09-13$8.36$8.36784,500
2010-09-10$8.16$8.16421,600
2010-09-09$8.09$8.09365,900
2010-09-08$8.12$8.12664,900
2010-09-07$7.95$7.95629,500
2010-09-03$8.20$8.20598,500
2010-09-02$8.12$8.12762,100
2010-09-01$8.00$8.001,093,900
2010-08-31$7.81$7.81869,000
2010-08-30$7.85$7.85630,400
2010-08-27$7.96$7.96661,300
2010-08-26$7.83$7.831,194,700
2010-08-25$8.20$8.201,004,900
2010-08-24$7.78$7.781,144,700
2010-08-23$7.78$7.78774,300
2010-08-20$7.95$7.95977,600
2010-08-19$7.99$7.991,121,200
2010-08-18$8.30$8.30681,800
2010-08-17$8.36$8.36618,000
2010-08-16$8.29$8.291,020,600
2010-08-13$8.38$8.38769,100
2010-08-12$8.55$8.551,124,800
2010-08-11$8.45$8.451,244,800
2010-08-10$8.75$8.751,103,600
2010-08-09$8.87$8.871,457,300
2010-08-06$9.10$9.10817,400
2010-08-05$9.00$9.002,761,900
2010-08-04$9.43$9.433,653,800
2010-08-03$9.99$9.99822,600
2010-08-02$9.99$9.99569,800
2010-07-30$9.89$9.89578,400
2010-07-29$9.79$9.79615,400
2010-07-28$9.69$9.69426,700
2010-07-27$10.00$10.00627,400
2010-07-26$10.07$10.071,160,500
2010-07-23$9.68$9.68830,600
2010-07-22$9.47$9.47588,300
2010-07-21$9.24$9.241,048,200
2010-07-20$9.35$9.35612,300
2010-07-19$9.22$9.22709,900
2010-07-16$9.09$9.091,071,300
2010-07-15$9.51$9.51584,400
2010-07-14$9.70$9.70513,000
2010-07-13$9.74$9.74705,900
2010-07-12$9.47$9.47596,400
2010-07-09$9.62$9.62625,200
2010-07-08$9.34$9.34626,600
2010-07-07$9.30$9.30699,000
2010-07-06$9.10$9.101,206,600
2010-07-02$9.17$9.17650,900
2010-07-01$9.22$9.221,870,600
2010-06-30$9.57$9.571,277,600
2010-06-29$9.67$9.671,701,100
2010-06-28$10.00$10.001,462,800
2010-06-25$9.84$9.841,260,800
2010-06-24$9.40$9.40712,600
2010-06-23$9.21$9.21603,300
2010-06-22$9.19$9.191,011,000
2010-06-21$9.14$9.14803,300
2010-06-18$9.36$9.362,099,300
2010-06-17$9.35$9.35608,300
2010-06-16$9.59$9.59553,200
2010-06-15$9.71$9.71650,200
2010-06-14$9.44$9.44703,200
2010-06-11$9.32$9.32821,000
2010-06-10$9.21$9.211,411,200
2010-06-09$8.84$8.841,128,800
2010-06-08$9.05$9.051,913,500
2010-06-07$9.32$9.321,223,400
2010-06-04$9.76$9.761,394,000
2010-06-03$10.07$10.071,441,000
2010-06-02$10.24$10.242,427,900
2010-06-01$9.07$9.071,281,700
2010-05-28$9.20$9.201,137,100
2010-05-27$9.29$9.291,236,600
2010-05-26$8.94$8.941,364,800
2010-05-25$8.87$8.871,393,300
2010-05-24$8.88$8.881,105,800
2010-05-21$8.88$8.881,498,800
2010-05-20$8.84$8.842,545,700
2010-05-19$9.32$9.321,377,300
2010-05-18$9.67$9.671,128,900
2010-05-17$9.69$9.691,231,200
2010-05-14$9.76$9.761,143,400
2010-05-13$10.09$10.09887,000
2010-05-12$10.01$10.011,184,100
2010-05-11$9.84$9.841,192,400
2010-05-10$9.69$9.691,419,100
2010-05-07$9.38$9.382,371,500
2010-05-06$9.58$9.583,035,300
2010-05-05$9.95$9.951,637,600
2010-05-04$10.47$10.471,406,800
2010-05-03$10.88$10.88768,600
2010-04-30$10.76$10.76886,100
2010-04-29$11.02$11.021,040,300
2010-04-28$10.65$10.65710,300
2010-04-27$10.51$10.51710,600
2010-04-26$10.65$10.65678,500
2010-04-23$10.70$10.70593,000
2010-04-22$10.70$10.70976,700
2010-04-21$10.70$10.70893,800
2010-04-20$10.80$10.80861,700
2010-04-19$10.60$10.60895,500
2010-04-16$10.79$10.791,294,600
2010-04-15$10.80$10.80728,900
2010-04-14$10.94$10.94826,600
2010-04-13$10.70$10.70871,100
2010-04-12$10.73$10.731,533,100
2010-04-09$10.82$10.821,015,400
2010-04-08$10.81$10.81848,000
2010-04-07$10.79$10.791,605,700
2010-04-06$11.00$11.001,405,300
2010-04-05$11.13$11.131,062,600
2010-04-01$10.85$10.851,803,400
2010-03-31$10.93$10.936,997,200
2010-03-30$10.30$10.30900,600
2010-03-29$10.31$10.31974,000
2010-03-26$10.36$10.361,962,900
2010-03-25$10.61$10.611,687,000
2010-03-24$10.80$10.803,629,200
2010-03-23$10.65$10.652,311,800
2010-03-22$10.18$10.181,380,100
2010-03-19$9.94$9.942,500,300
2010-03-18$9.71$9.71792,700
2010-03-17$9.80$9.80999,400
2010-03-16$9.80$9.801,584,700
2010-03-15$9.87$9.871,865,800
2010-03-12$9.69$9.691,805,500
2010-03-11$9.98$9.982,519,100
2010-03-10$10.05$10.056,203,300
2010-03-09$9.12$9.121,885,400
2010-03-08$8.91$8.911,229,100
2010-03-05$8.90$8.901,498,000
2010-03-04$8.78$8.781,152,400
2010-03-03$8.84$8.841,479,300
2010-03-02$8.91$8.912,354,600
2010-03-01$9.09$9.092,030,700
2010-02-26$8.84$8.841,335,600
2010-02-25$8.92$8.921,604,000
2010-02-24$8.83$8.831,264,200
2010-02-23$8.90$8.901,223,100
2010-02-22$9.03$9.031,312,200
2010-02-19$8.97$8.971,626,900
2010-02-18$9.06$9.061,653,200
2010-02-17$9.29$9.291,636,100
2010-02-16$9.32$9.322,539,000
2010-02-12$9.01$9.013,295,300
2010-02-11$8.66$8.666,486,800
2010-02-10$8.98$8.9817,397,800
2010-02-09$11.04$11.04693,700
2010-02-08$11.00$11.00466,700
2010-02-05$11.04$11.041,018,100
2010-02-04$11.12$11.121,011,800
2010-02-03$11.74$11.74969,000
2010-02-02$11.76$11.761,137,100
2010-02-01$11.37$11.37704,000
2010-01-29$11.16$11.16975,300
2010-01-28$11.27$11.271,821,400
2010-01-27$11.57$11.572,399,700
2010-01-26$10.71$10.71861,700
2010-01-25$10.98$10.981,043,300
2010-01-22$11.15$11.151,674,400
2010-01-21$11.09$11.091,511,800
2010-01-20$11.27$11.271,351,900
2010-01-19$11.38$11.38768,600
2010-01-15$11.29$11.29966,900
2010-01-14$11.65$11.65907,300
2010-01-13$11.45$11.45754,300
2010-01-12$11.29$11.29913,300
2010-01-11$11.63$11.63676,200
2010-01-08$11.50$11.50585,500
2010-01-07$11.41$11.411,247,100
2010-01-06$11.50$11.50826,700
2010-01-05$11.54$11.541,338,600
2010-01-04$11.27$11.271,067,100