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 — 2006

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2006-12-29$11.12$11.12818,600
2006-12-28$11.41$11.41540,700
2006-12-27$11.67$11.67514,600
2006-12-26$11.52$11.52381,000
2006-12-22$11.57$11.57349,200
2006-12-21$11.72$11.72534,300
2006-12-20$11.81$11.81577,000
2006-12-19$11.77$11.771,566,600
2006-12-18$12.15$12.151,134,800
2006-12-15$12.04$12.041,120,800
2006-12-14$12.08$12.081,241,700
2006-12-13$12.21$12.211,152,700
2006-12-12$12.30$12.301,555,400
2006-12-11$12.49$12.493,782,400
2006-12-08$12.13$12.135,531,100
2006-12-07$11.10$11.10972,700
2006-12-06$11.43$11.431,258,300
2006-12-05$11.75$11.753,864,000
2006-12-04$11.34$11.346,769,500
2006-12-01$10.41$10.411,636,800
2006-11-30$10.19$10.19951,500
2006-11-29$10.27$10.272,448,800
2006-11-28$10.04$10.042,023,300
2006-11-27$10.20$10.201,911,700
2006-11-24$10.73$10.73366,000
2006-11-22$10.74$10.74817,600
2006-11-21$10.76$10.761,330,100
2006-11-20$10.98$10.982,969,400
2006-11-17$10.82$10.824,114,700
2006-11-16$10.50$10.502,607,400
2006-11-15$10.84$10.847,196,900
2006-11-14$11.32$11.326,150,600
2006-11-13$12.43$12.4324,558,400
2006-11-10$10.38$10.381,754,700
2006-11-09$10.19$10.194,911,400
2006-11-08$9.20$9.20843,100
2006-11-07$9.11$9.11842,600
2006-11-06$8.73$8.73637,500
2006-11-03$8.17$8.17589,800
2006-11-02$8.18$8.18578,800
2006-11-01$8.22$8.22483,800
2006-10-31$8.58$8.58724,600
2006-10-30$8.25$8.25432,200
2006-10-27$8.34$8.34273,100
2006-10-26$8.57$8.57518,600
2006-10-25$8.41$8.41465,800
2006-10-24$8.42$8.42665,600
2006-10-23$8.56$8.56596,500
2006-10-20$8.91$8.91979,500
2006-10-19$9.13$9.132,377,300
2006-10-18$8.67$8.671,348,000
2006-10-17$8.35$8.35893,700
2006-10-16$8.52$8.52438,400
2006-10-13$8.36$8.36394,700
2006-10-12$8.63$8.63413,800
2006-10-11$8.18$8.18429,400
2006-10-10$8.45$8.45506,300
2006-10-09$8.72$8.721,492,700
2006-10-06$8.02$8.02969,100
2006-10-05$7.80$7.80402,200
2006-10-04$7.54$7.54594,800
2006-10-03$7.18$7.18314,800
2006-10-02$7.23$7.23255,200
2006-09-29$7.18$7.18413,900
2006-09-28$7.49$7.49227,900
2006-09-27$7.42$7.42360,000
2006-09-26$7.12$7.12203,600
2006-09-25$7.28$7.28244,800
2006-09-22$7.11$7.11211,500
2006-09-21$7.26$7.26158,000
2006-09-20$7.46$7.46248,700
2006-09-19$7.48$7.48316,300
2006-09-18$7.38$7.38217,200
2006-09-15$7.28$7.28660,900
2006-09-14$7.16$7.16255,200
2006-09-13$7.31$7.31229,300
2006-09-12$7.05$7.05311,100
2006-09-11$6.90$6.90464,300
2006-09-08$7.45$7.45365,200
2006-09-07$7.41$7.41427,300
2006-09-06$7.29$7.29772,800
2006-09-05$7.56$7.56294,800
2006-09-01$7.58$7.58182,100
2006-08-31$7.64$7.64415,400
2006-08-30$7.37$7.37361,300
2006-08-29$7.04$7.041,314,000
2006-08-28$7.04$7.04587,200
2006-08-25$7.20$7.20184,000
2006-08-24$7.14$7.14181,300
2006-08-23$7.06$7.06298,700
2006-08-22$7.10$7.10229,600
2006-08-21$7.00$7.00726,500
2006-08-18$7.00$7.00578,900
2006-08-17$6.82$6.82446,800
2006-08-16$6.58$6.58270,200
2006-08-15$6.38$6.38180,200
2006-08-14$6.17$6.17202,600
2006-08-11$6.05$6.05315,200
2006-08-10$6.35$6.35166,400
2006-08-09$6.25$6.25317,000
2006-08-08$6.17$6.17262,800
2006-08-07$6.39$6.39317,100
2006-08-04$6.64$6.64412,800
2006-08-03$6.59$6.59411,900
2006-08-02$6.15$6.15384,400
2006-08-01$5.99$5.99228,600
2006-07-31$6.01$6.01409,000
2006-07-28$6.05$6.05869,600
2006-07-27$6.08$6.08337,100
2006-07-26$6.06$6.06462,400
2006-07-25$6.05$6.05357,500
2006-07-24$6.02$6.02222,600
2006-07-21$5.88$5.88293,500
2006-07-20$5.95$5.95382,200
2006-07-19$6.13$6.13458,600
2006-07-18$5.97$5.97481,700
2006-07-17$5.96$5.96432,700
2006-07-14$5.81$5.81328,800
2006-07-13$5.87$5.87510,700
2006-07-12$5.86$5.86312,600
2006-07-11$5.98$5.98277,400
2006-07-10$5.80$5.80214,000
2006-07-07$5.80$5.80296,900
2006-07-06$5.86$5.86451,800
2006-07-05$5.93$5.93518,600
2006-07-03$5.93$5.93421,500
2006-06-30$6.05$6.05676,800
2006-06-29$5.98$5.98656,300
2006-06-28$5.80$5.80537,500
2006-06-27$6.04$6.04435,100
2006-06-26$6.22$6.22279,700
2006-06-23$6.20$6.20176,400
2006-06-22$6.34$6.34164,400
2006-06-21$6.43$6.43214,900
2006-06-20$6.29$6.29234,500
2006-06-19$6.33$6.33349,100
2006-06-16$6.41$6.411,584,500
2006-06-15$6.70$6.70303,500
2006-06-14$6.35$6.35376,800
2006-06-13$6.25$6.25466,800
2006-06-12$6.38$6.38487,000
2006-06-09$6.80$6.80329,600
2006-06-08$6.99$6.99573,800
2006-06-07$7.01$7.01294,300
2006-06-06$7.13$7.13443,900
2006-06-05$7.22$7.22623,800
2006-06-02$7.37$7.37703,200
2006-06-01$7.55$7.55686,800
2006-05-31$7.82$7.821,407,000
2006-05-30$7.46$7.46748,500
2006-05-26$7.04$7.04345,000
2006-05-25$7.17$7.17243,500
2006-05-24$6.85$6.85434,300
2006-05-23$6.95$6.95513,200
2006-05-22$7.17$7.17561,900
2006-05-19$7.14$7.14914,200
2006-05-18$7.18$7.18395,800
2006-05-17$7.31$7.31444,900
2006-05-16$7.69$7.69371,100
2006-05-15$7.99$7.99881,600
2006-05-12$7.76$7.76996,000
2006-05-11$8.00$8.00586,600
2006-05-10$8.14$8.14390,800
2006-05-09$8.18$8.18649,000
2006-05-08$8.38$8.38393,200
2006-05-05$8.55$8.55744,900
2006-05-04$8.34$8.34505,000
2006-05-03$8.06$8.06599,800
2006-05-02$8.14$8.14784,500
2006-05-01$8.25$8.25875,700
2006-04-28$8.58$8.582,471,900
2006-04-27$8.64$8.648,400,500
2006-04-26$7.56$7.56250,700
2006-04-25$7.67$7.67427,200
2006-04-24$7.65$7.65336,500
2006-04-21$7.48$7.48590,900
2006-04-20$7.63$7.63641,900
2006-04-19$7.60$7.60795,300
2006-04-18$7.60$7.60618,300
2006-04-17$7.65$7.65366,900
2006-04-13$7.76$7.76277,200
2006-04-12$7.64$7.64703,500
2006-04-11$7.26$7.261,732,100
2006-04-10$7.88$7.881,398,800
2006-04-07$8.63$8.63498,000
2006-04-06$8.75$8.75546,300
2006-04-05$8.78$8.78262,800
2006-04-04$8.64$8.64489,400
2006-04-03$8.76$8.76523,000
2006-03-31$9.01$9.01998,400
2006-03-30$8.72$8.72390,900
2006-03-29$8.83$8.83406,600
2006-03-28$8.66$8.66534,400
2006-03-27$8.71$8.71624,000
2006-03-24$8.91$8.91603,200
2006-03-23$8.92$8.92479,700
2006-03-22$9.03$9.03862,400
2006-03-21$8.72$8.721,495,800
2006-03-20$9.09$9.091,991,600
2006-03-17$8.15$8.15915,300
2006-03-16$8.01$8.01290,700
2006-03-15$7.98$7.98520,800
2006-03-14$7.89$7.89521,200
2006-03-13$7.71$7.71652,800
2006-03-10$7.70$7.70603,800
2006-03-09$7.93$7.93726,800
2006-03-08$8.08$8.08690,500
2006-03-07$7.98$7.98557,500
2006-03-06$7.81$7.81661,800
2006-03-03$7.95$7.95726,800
2006-03-02$8.20$8.20731,300
2006-03-01$8.14$8.14358,000
2006-02-28$8.04$8.04452,200
2006-02-27$8.19$8.19637,900
2006-02-24$8.02$8.02623,500
2006-02-23$7.88$7.88786,300
2006-02-22$7.84$7.84810,900
2006-02-21$7.91$7.911,977,400
2006-02-17$8.24$8.241,796,500
2006-02-16$7.93$7.931,603,000
2006-02-15$7.54$7.541,469,100
2006-02-14$7.26$7.263,336,700
2006-02-13$6.39$6.39383,900
2006-02-10$6.42$6.42731,000
2006-02-09$6.53$6.531,675,700
2006-02-08$5.95$5.95497,500
2006-02-07$5.59$5.592,173,200
2006-02-06$5.89$5.89912,200
2006-02-03$5.59$5.59183,900
2006-02-02$5.59$5.59497,600
2006-02-01$5.62$5.62273,500
2006-01-31$5.41$5.41288,300
2006-01-30$5.42$5.42239,000
2006-01-27$5.52$5.52263,500
2006-01-26$5.50$5.50363,000
2006-01-25$5.24$5.24133,200
2006-01-24$5.32$5.32257,200
2006-01-23$5.31$5.31240,600
2006-01-20$5.30$5.30450,000
2006-01-19$5.39$5.39356,600
2006-01-18$5.54$5.54346,400
2006-01-17$5.48$5.48304,900
2006-01-13$5.45$5.45272,200
2006-01-12$5.38$5.38318,100
2006-01-11$5.45$5.45487,700
2006-01-10$5.58$5.58346,900
2006-01-09$5.39$5.39229,500
2006-01-06$5.27$5.27346,300
2006-01-05$5.21$5.21267,400
2006-01-04$5.10$5.10251,000
2006-01-03$5.25$5.25346,000