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 — 2004

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2004-12-31$5.90$5.90359,800
2004-12-30$6.03$6.03269,100
2004-12-29$6.09$6.09624,700
2004-12-28$6.02$6.02239,200
2004-12-27$5.91$5.91310,600
2004-12-23$5.99$5.99204,400
2004-12-22$6.01$6.01451,000
2004-12-21$5.92$5.92255,600
2004-12-20$5.84$5.84598,400
2004-12-17$5.77$5.77429,200
2004-12-16$5.96$5.96350,500
2004-12-15$6.11$6.11392,700
2004-12-14$6.09$6.09343,100
2004-12-13$6.19$6.19537,400
2004-12-10$6.21$6.21802,300
2004-12-09$6.08$6.08982,800
2004-12-08$5.87$5.87615,900
2004-12-07$5.83$5.83835,000
2004-12-06$5.95$5.95968,500
2004-12-03$5.95$5.953,098,200
2004-12-02$6.01$6.013,861,300
2004-12-01$4.92$4.921,044,000
2004-11-30$4.72$4.72756,200
2004-11-29$4.55$4.55467,000
2004-11-26$4.51$4.51189,300
2004-11-24$4.37$4.37430,100
2004-11-23$4.44$4.44311,200
2004-11-22$4.28$4.28234,500
2004-11-19$4.29$4.29311,600
2004-11-18$4.38$4.38352,400
2004-11-17$4.32$4.321,128,200
2004-11-16$4.42$4.42244,100
2004-11-15$4.43$4.43216,700
2004-11-12$4.47$4.47240,600
2004-11-11$4.48$4.48371,600
2004-11-10$4.54$4.54244,800
2004-11-09$4.58$4.58380,300
2004-11-08$4.51$4.51515,200
2004-11-05$4.60$4.60595,500
2004-11-04$4.46$4.46473,000
2004-11-03$4.45$4.45478,000
2004-11-02$4.42$4.42895,200
2004-11-01$4.50$4.50825,100
2004-10-29$4.66$4.661,992,300
2004-10-28$4.92$4.92838,100
2004-10-27$5.06$5.06912,500
2004-10-26$4.88$4.88360,200
2004-10-25$4.89$4.89211,300
2004-10-22$4.78$4.78217,000
2004-10-21$4.89$4.89240,600
2004-10-20$4.81$4.81190,200
2004-10-19$4.75$4.75280,900
2004-10-18$4.80$4.80667,900
2004-10-15$4.77$4.77484,200
2004-10-14$4.74$4.74287,200
2004-10-13$4.83$4.83252,700
2004-10-12$4.91$4.91286,900
2004-10-11$4.98$4.98424,900
2004-10-08$4.90$4.90449,700
2004-10-07$5.12$5.121,059,400
2004-10-06$4.95$4.95317,600
2004-10-05$4.85$4.85478,400
2004-10-04$5.06$5.06362,300
2004-10-01$4.91$4.91296,900
2004-09-30$4.90$4.90322,400
2004-09-29$4.96$4.96171,900
2004-09-28$4.97$4.97260,700
2004-09-27$4.93$4.93479,500
2004-09-24$4.84$4.84337,800
2004-09-23$4.86$4.86338,100
2004-09-22$5.04$5.04363,700
2004-09-21$5.17$5.17552,800
2004-09-20$5.31$5.31442,900
2004-09-17$5.29$5.29769,300
2004-09-16$5.53$5.531,842,300
2004-09-15$5.16$5.16503,500
2004-09-14$5.34$5.34423,000
2004-09-13$5.38$5.38491,800
2004-09-10$5.50$5.50627,500
2004-09-09$5.77$5.77518,800
2004-09-08$5.88$5.88276,700
2004-09-07$6.06$6.06256,600
2004-09-03$6.05$6.05296,200
2004-09-02$5.98$5.981,349,200
2004-09-01$5.97$5.97660,700
2004-08-31$6.00$6.00387,400
2004-08-30$6.00$6.00169,600
2004-08-27$6.13$6.13199,400
2004-08-26$6.01$6.01293,200
2004-08-25$6.21$6.21280,300
2004-08-24$6.01$6.01311,100
2004-08-23$6.00$6.00464,500
2004-08-20$5.93$5.93434,800
2004-08-19$5.69$5.69372,100
2004-08-18$5.75$5.75595,400
2004-08-17$5.22$5.22347,100
2004-08-16$4.76$4.76188,100
2004-08-13$4.56$4.56198,900
2004-08-12$4.76$4.76301,100
2004-08-11$4.77$4.77895,700
2004-08-10$4.44$4.44433,700
2004-08-09$4.40$4.40218,600
2004-08-06$4.71$4.71353,000
2004-08-05$4.59$4.59233,400
2004-08-04$4.63$4.63205,100
2004-08-03$4.60$4.60261,200
2004-08-02$4.76$4.76220,700
2004-07-30$5.05$5.05385,600
2004-07-29$4.89$4.89232,300
2004-07-28$4.64$4.64253,400
2004-07-27$4.65$4.65365,000
2004-07-26$4.27$4.27352,900
2004-07-23$4.30$4.30509,900
2004-07-22$4.54$4.54588,000
2004-07-21$4.56$4.56751,200
2004-07-20$4.60$4.60893,500
2004-07-19$4.43$4.43309,700
2004-07-16$4.54$4.54245,400
2004-07-15$4.80$4.80296,900
2004-07-14$4.84$4.84360,200
2004-07-13$4.83$4.83363,700
2004-07-12$4.95$4.95282,200
2004-07-09$4.98$4.98324,800
2004-07-08$4.78$4.78588,900
2004-07-07$5.24$5.24256,900
2004-07-06$5.25$5.25507,900
2004-07-02$5.49$5.49286,200
2004-07-01$5.72$5.72339,400
2004-06-30$5.74$5.74258,400
2004-06-29$5.78$5.78411,500
2004-06-28$5.84$5.84269,000
2004-06-25$6.00$6.00470,200
2004-06-24$6.00$6.00230,500
2004-06-23$6.03$6.03301,200
2004-06-22$5.67$5.67417,700
2004-06-21$5.76$5.76282,100
2004-06-18$5.74$5.74414,600
2004-06-17$5.76$5.76148,000
2004-06-16$6.00$6.00307,600
2004-06-15$5.93$5.93301,900
2004-06-14$5.66$5.66373,000
2004-06-10$5.84$5.84611,800
2004-06-09$5.75$5.75853,600
2004-06-08$6.33$6.33354,700
2004-06-07$6.29$6.29325,000
2004-06-04$6.32$6.32281,600
2004-06-03$6.18$6.18344,100
2004-06-02$6.50$6.50223,400
2004-06-01$6.70$6.70196,700
2004-05-28$6.46$6.46316,300
2004-05-27$6.48$6.48314,100
2004-05-26$6.51$6.51389,000
2004-05-25$6.44$6.44493,500
2004-05-24$6.17$6.17251,300
2004-05-21$6.00$6.00306,300
2004-05-20$5.93$5.93417,400
2004-05-19$6.17$6.17381,400
2004-05-18$6.32$6.32494,600
2004-05-17$6.36$6.36336,100
2004-05-14$6.59$6.59292,400
2004-05-13$6.89$6.89311,800
2004-05-12$7.15$7.15687,900
2004-05-11$6.71$6.71315,900
2004-05-10$6.68$6.68371,200
2004-05-07$6.80$6.80440,500
2004-05-06$7.00$7.00560,400
2004-05-05$7.31$7.31384,400
2004-05-04$7.22$7.22879,500
2004-05-03$7.22$7.221,964,900
2004-04-30$7.27$7.271,063,100
2004-04-29$8.19$8.19964,100
2004-04-28$8.24$8.24891,700
2004-04-27$8.79$8.792,388,500
2004-04-26$8.79$8.791,260,100
2004-04-23$7.87$7.87218,900
2004-04-22$7.95$7.95272,600
2004-04-21$7.79$7.79270,100
2004-04-20$7.45$7.45335,500
2004-04-19$7.89$7.89401,600
2004-04-16$7.66$7.66287,000
2004-04-15$7.44$7.44230,800
2004-04-14$7.45$7.45234,600
2004-04-13$7.36$7.36346,800
2004-04-12$7.77$7.77202,100
2004-04-08$7.70$7.70295,100
2004-04-07$8.15$8.15229,900
2004-04-06$8.04$8.04306,500
2004-04-05$8.16$8.16409,300
2004-04-02$7.84$7.84362,300
2004-04-01$7.80$7.80325,800
2004-03-31$7.76$7.76545,300
2004-03-30$7.80$7.80406,200
2004-03-29$7.83$7.83460,200
2004-03-26$7.67$7.67207,100
2004-03-25$7.93$7.93410,900
2004-03-24$7.37$7.37326,900
2004-03-23$7.68$7.68385,700
2004-03-22$7.52$7.52725,500
2004-03-19$8.13$8.13746,600
2004-03-18$8.53$8.53333,600
2004-03-17$8.68$8.68396,400
2004-03-16$8.29$8.29516,600
2004-03-15$8.76$8.76457,100
2004-03-12$9.10$9.10380,200
2004-03-11$8.68$8.68407,500
2004-03-10$8.88$8.88640,300
2004-03-09$9.00$9.00685,300
2004-03-08$9.13$9.13579,400
2004-03-05$9.44$9.44907,100
2004-03-04$8.98$8.98286,300
2004-03-03$8.87$8.87843,500
2004-03-02$8.36$8.36330,000
2004-03-01$8.37$8.37479,600
2004-02-27$7.95$7.95394,300
2004-02-26$8.27$8.27297,100
2004-02-25$8.00$8.00343,400
2004-02-24$8.01$8.01522,700
2004-02-23$7.74$7.74329,000
2004-02-20$8.02$8.02485,300
2004-02-19$8.31$8.31314,900
2004-02-18$8.49$8.49594,600
2004-02-17$8.60$8.60266,600
2004-02-13$8.31$8.31484,000
2004-02-12$8.86$8.86334,000
2004-02-11$9.05$9.05872,200
2004-02-10$8.55$8.55599,900
2004-02-09$8.50$8.50511,900
2004-02-06$8.74$8.74446,700
2004-02-05$8.24$8.24481,300
2004-02-04$8.10$8.10857,400
2004-02-03$8.91$8.91225,400
2004-02-02$9.14$9.14381,900
2004-01-30$8.86$8.86545,200
2004-01-29$9.06$9.061,070,400
2004-01-28$9.00$9.001,085,400
2004-01-27$9.00$9.002,549,900
2004-01-26$9.50$9.501,296,300
2004-01-23$8.35$8.35887,500
2004-01-22$8.20$8.20696,000
2004-01-21$8.46$8.461,290,500
2004-01-20$7.70$7.70820,800
2004-01-16$7.45$7.45372,100
2004-01-15$7.48$7.48283,100
2004-01-14$7.56$7.56445,500
2004-01-13$7.31$7.31628,400
2004-01-12$7.37$7.37499,000
2004-01-09$7.35$7.35489,800
2004-01-08$7.59$7.59453,300
2004-01-07$7.61$7.61666,900
2004-01-06$7.39$7.39547,700
2004-01-05$7.48$7.481,693,800
2004-01-02$6.81$6.81542,500