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 — 2011

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2011-12-30$7.21$7.21658,900
2011-12-29$7.13$7.13676,000
2011-12-28$6.88$6.88335,400
2011-12-27$7.01$7.01568,600
2011-12-23$6.96$6.96302,200
2011-12-22$7.00$7.00568,200
2011-12-21$7.06$7.06678,800
2011-12-20$7.00$7.00825,800
2011-12-19$6.75$6.75707,900
2011-12-16$6.74$6.741,306,900
2011-12-15$6.83$6.83769,600
2011-12-14$6.73$6.73492,800
2011-12-13$6.85$6.85550,400
2011-12-12$7.09$7.09451,500
2011-12-09$7.13$7.13482,200
2011-12-08$6.90$6.90425,600
2011-12-07$7.09$7.09601,100
2011-12-06$7.12$7.12551,900
2011-12-05$7.14$7.14553,600
2011-12-02$7.27$7.27335,800
2011-12-01$7.27$7.27516,200
2011-11-30$7.42$7.421,109,700
2011-11-29$6.94$6.94438,800
2011-11-28$6.97$6.97666,800
2011-11-25$6.47$6.47326,900
2011-11-23$6.47$6.47608,200
2011-11-22$6.64$6.64614,900
2011-11-21$6.57$6.57715,600
2011-11-18$6.68$6.68540,000
2011-11-17$6.84$6.84605,800
2011-11-16$6.89$6.89457,300
2011-11-15$7.04$7.04448,000
2011-11-14$6.92$6.92483,400
2011-11-11$7.14$7.14685,500
2011-11-10$6.90$6.901,015,000
2011-11-09$7.16$7.16758,000
2011-11-08$7.53$7.531,089,100
2011-11-07$8.28$8.28690,300
2011-11-04$8.19$8.19502,400
2011-11-03$8.19$8.19532,300
2011-11-02$8.03$8.03617,800
2011-11-01$7.73$7.731,225,000
2011-10-31$8.29$8.29650,900
2011-10-28$8.57$8.57504,200
2011-10-27$8.50$8.50934,200
2011-10-26$7.96$7.96977,200
2011-10-25$7.84$7.84683,700
2011-10-24$7.84$7.84596,700
2011-10-21$7.83$7.83465,400
2011-10-20$7.49$7.49351,400
2011-10-19$7.70$7.70530,500
2011-10-18$7.76$7.76563,200
2011-10-17$7.44$7.44476,200
2011-10-14$7.82$7.82491,700
2011-10-13$7.68$7.68378,500
2011-10-12$7.65$7.65596,200
2011-10-11$7.43$7.43509,500
2011-10-10$7.47$7.47698,600
2011-10-07$7.26$7.261,189,400
2011-10-06$7.17$7.17861,500
2011-10-05$6.86$6.86903,300
2011-10-04$6.56$6.561,270,600
2011-10-03$6.53$6.531,316,000
2011-09-30$6.78$6.78815,900
2011-09-29$6.82$6.82771,200
2011-09-28$6.69$6.69813,600
2011-09-27$7.31$7.31776,900
2011-09-26$7.23$7.23437,800
2011-09-23$7.15$7.15706,100
2011-09-22$6.83$6.831,157,500
2011-09-21$6.82$6.82601,900
2011-09-20$6.80$6.80413,700
2011-09-19$6.83$6.83446,400
2011-09-16$7.05$7.05990,000
2011-09-15$7.17$7.17383,600
2011-09-14$7.14$7.14598,600
2011-09-13$7.11$7.11601,200
2011-09-12$7.02$7.02618,900
2011-09-09$6.91$6.91901,300
2011-09-08$7.24$7.24580,300
2011-09-07$7.41$7.411,059,700
2011-09-06$7.07$7.07803,100
2011-09-02$6.95$6.95671,100
2011-09-01$7.23$7.23598,500
2011-08-31$7.49$7.49665,700
2011-08-30$7.53$7.53781,400
2011-08-29$7.39$7.391,054,700
2011-08-26$7.12$7.12662,700
2011-08-25$6.90$6.90609,900
2011-08-24$7.18$7.18384,200
2011-08-23$7.28$7.28856,800
2011-08-22$6.99$6.99605,800
2011-08-19$7.05$7.051,083,400
2011-08-18$6.80$6.80830,700
2011-08-17$7.12$7.12574,900
2011-08-16$7.10$7.10596,700
2011-08-15$7.29$7.29795,800
2011-08-12$6.70$6.70739,800
2011-08-11$6.78$6.781,334,500
2011-08-10$6.63$6.631,151,700
2011-08-09$7.29$7.291,466,100
2011-08-08$7.19$7.191,673,600
2011-08-05$7.94$7.941,240,800
2011-08-04$7.41$7.41820,800
2011-08-03$8.09$8.09629,600
2011-08-02$8.10$8.10684,200
2011-08-01$8.57$8.57521,100
2011-07-29$8.64$8.64510,300
2011-07-28$8.67$8.67728,100
2011-07-27$8.50$8.50737,400
2011-07-26$8.63$8.63372,800
2011-07-25$8.69$8.69396,700
2011-07-22$8.79$8.79256,300
2011-07-21$8.82$8.82656,800
2011-07-20$8.71$8.71256,300
2011-07-19$8.75$8.75773,500
2011-07-18$8.76$8.76726,300
2011-07-15$9.12$9.12450,000
2011-07-14$9.23$9.23411,100
2011-07-13$9.22$9.22286,400
2011-07-12$9.15$9.15300,200
2011-07-11$9.18$9.18233,400
2011-07-08$9.31$9.31215,600
2011-07-07$9.30$9.30486,300
2011-07-06$9.04$9.04500,300
2011-07-05$9.03$9.03561,500
2011-07-01$9.30$9.30390,100
2011-06-30$9.16$9.16501,400
2011-06-29$9.19$9.19372,200
2011-06-28$9.26$9.26540,500
2011-06-27$9.12$9.12583,400
2011-06-24$8.93$8.931,156,500
2011-06-23$8.91$8.91688,700
2011-06-22$8.79$8.79464,600
2011-06-21$8.80$8.80402,900
2011-06-20$8.62$8.62663,200
2011-06-17$8.72$8.721,412,900
2011-06-16$8.86$8.86435,600
2011-06-15$8.76$8.76587,500
2011-06-14$8.83$8.83535,400
2011-06-13$8.93$8.93505,100
2011-06-10$8.99$8.99755,900
2011-06-09$8.90$8.90452,100
2011-06-08$8.95$8.95439,400
2011-06-07$9.06$9.06678,900
2011-06-06$8.74$8.74631,500
2011-06-03$8.79$8.79538,600
2011-06-02$8.90$8.90526,700
2011-06-01$8.97$8.971,702,200
2011-05-31$9.23$9.231,230,800
2011-05-27$9.31$9.31528,400
2011-05-26$9.03$9.03366,200
2011-05-25$8.90$8.90453,700
2011-05-24$8.79$8.79655,600
2011-05-23$8.63$8.631,100,000
2011-05-20$8.70$8.70539,300
2011-05-19$8.75$8.75424,100
2011-05-18$8.84$8.84476,700
2011-05-17$8.72$8.72671,800
2011-05-16$8.89$8.89706,900
2011-05-13$9.02$9.02863,300
2011-05-12$9.08$9.08823,000
2011-05-11$8.69$8.69622,300
2011-05-10$8.85$8.85486,600
2011-05-09$8.64$8.64698,700
2011-05-06$8.54$8.54681,600
2011-05-05$8.88$8.88699,100
2011-05-04$9.03$9.03472,600
2011-05-03$9.05$9.05458,100
2011-05-02$9.14$9.14468,600
2011-04-29$9.38$9.38496,000
2011-04-28$9.29$9.29363,500
2011-04-27$9.30$9.30507,300
2011-04-26$9.11$9.11600,500
2011-04-25$8.76$8.76354,000
2011-04-21$8.76$8.76332,100
2011-04-20$8.79$8.79805,800
2011-04-19$8.56$8.56702,300
2011-04-18$8.74$8.74445,700
2011-04-15$8.86$8.86502,100
2011-04-14$8.83$8.83338,200
2011-04-13$8.70$8.70500,800
2011-04-12$8.82$8.82496,900
2011-04-11$8.82$8.82525,400
2011-04-08$9.07$9.07419,300
2011-04-07$9.08$9.08554,200
2011-04-06$9.23$9.23452,400
2011-04-05$9.12$9.121,664,700
2011-04-04$9.14$9.14442,000
2011-04-01$9.14$9.14644,300
2011-03-31$9.04$9.04954,500
2011-03-30$8.89$8.89516,400
2011-03-29$8.80$8.80437,900
2011-03-28$8.57$8.57531,000
2011-03-25$8.74$8.74675,400
2011-03-24$8.75$8.75419,100
2011-03-23$8.74$8.74523,700
2011-03-22$8.67$8.67450,900
2011-03-21$8.66$8.66717,500
2011-03-18$8.63$8.634,308,700
2011-03-17$8.78$8.78468,900
2011-03-16$8.87$8.87851,800
2011-03-15$8.86$8.86740,500
2011-03-14$8.99$8.99509,500
2011-03-11$9.02$9.02914,300
2011-03-10$9.03$9.03583,300
2011-03-09$9.16$9.16508,000
2011-03-08$9.03$9.03529,800
2011-03-07$8.76$8.76926,600
2011-03-04$8.93$8.93370,900
2011-03-03$8.96$8.96726,000
2011-03-02$8.97$8.97846,600
2011-03-01$9.27$9.271,758,000
2011-02-28$9.12$9.12859,400
2011-02-25$9.08$9.08641,100
2011-02-24$8.93$8.93623,400
2011-02-23$8.89$8.89544,500
2011-02-22$9.01$9.01777,100
2011-02-18$9.05$9.05789,500
2011-02-17$8.90$8.90826,000
2011-02-16$8.83$8.83442,600
2011-02-15$8.69$8.69495,300
2011-02-14$8.76$8.76415,800
2011-02-11$8.75$8.75438,200
2011-02-10$8.73$8.73512,800
2011-02-09$8.74$8.74458,700
2011-02-08$8.71$8.71419,500
2011-02-07$8.80$8.80621,500
2011-02-04$8.83$8.83842,500
2011-02-03$8.76$8.76893,400
2011-02-02$9.02$9.02709,800
2011-02-01$9.08$9.08883,500
2011-01-31$9.10$9.10349,500
2011-01-28$9.04$9.04986,800
2011-01-27$9.54$9.54610,800
2011-01-26$9.59$9.59628,500
2011-01-25$9.26$9.26479,600
2011-01-24$9.33$9.33511,100
2011-01-21$9.27$9.27797,600
2011-01-20$9.58$9.58667,300
2011-01-19$9.71$9.71971,900
2011-01-18$10.10$10.10366,700
2011-01-14$10.04$10.04414,700
2011-01-13$9.93$9.93498,300
2011-01-12$9.99$9.991,335,200
2011-01-11$10.04$10.04640,600
2011-01-10$10.17$10.17581,300
2011-01-07$10.23$10.23700,700
2011-01-06$10.35$10.35508,400
2011-01-05$10.35$10.35479,400
2011-01-04$10.35$10.35514,200
2011-01-03$10.29$10.29457,200