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 — 1994

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1994-12-30$4.00$4.00135,800
1994-12-29$3.75$3.7574,400
1994-12-28$3.75$3.75168,700
1994-12-27$4.00$4.0047,100
1994-12-23$3.88$3.8845,200
1994-12-22$3.88$3.8874,700
1994-12-21$3.88$3.8882,300
1994-12-20$4.00$4.0030,200
1994-12-19$3.94$3.9486,300
1994-12-16$3.88$3.88178,600
1994-12-15$4.00$4.0049,000
1994-12-14$4.13$4.135,300
1994-12-13$4.31$4.3130,300
1994-12-12$4.25$4.2548,100
1994-12-09$4.63$4.6329,800
1994-12-08$4.63$4.6315,700
1994-12-07$4.63$4.6314,400
1994-12-06$4.63$4.6358,900
1994-12-05$4.38$4.3821,400
1994-12-02$4.63$4.6315,400
1994-12-01$4.63$4.6315,200
1994-11-30$5.00$5.00115,700
1994-11-29$4.50$4.5055,900
1994-11-28$4.38$4.3850,000
1994-11-25$4.25$4.252,500
1994-11-23$3.88$3.8815,700
1994-11-22$4.00$4.009,900
1994-11-21$4.00$4.0035,000
1994-11-18$4.13$4.1320,600
1994-11-17$3.88$3.8813,400
1994-11-16$4.00$4.0022,100
1994-11-15$4.13$4.1329,300
1994-11-14$4.00$4.0045,500
1994-11-11$4.00$4.0018,100
1994-11-10$4.00$4.0024,100
1994-11-09$4.00$4.0013,700
1994-11-08$4.00$4.0047,500
1994-11-07$3.88$3.88128,300
1994-11-04$3.38$3.38123,400
1994-11-03$3.88$3.8878,700
1994-11-02$4.00$4.0027,400
1994-11-01$4.13$4.1312,700
1994-10-31$3.88$3.8821,100
1994-10-28$4.00$4.007,600
1994-10-27$4.00$4.0036,700
1994-10-26$4.50$4.5044,700
1994-10-25$4.00$4.0022,200
1994-10-24$4.00$4.0034,200
1994-10-21$3.94$3.9441,900
1994-10-20$3.88$3.8842,200
1994-10-19$4.25$4.2548,500
1994-10-18$4.38$4.3820,100
1994-10-17$4.50$4.5043,600
1994-10-14$4.88$4.888,700
1994-10-13$4.63$4.6323,600
1994-10-12$4.63$4.6329,900
1994-10-11$4.50$4.5026,700
1994-10-10$5.00$5.002,700
1994-10-07$4.63$4.631,300
1994-10-06$4.75$4.7533,700
1994-10-05$4.88$4.885,100
1994-10-04$4.75$4.7511,400
1994-10-03$4.75$4.758,500
1994-09-30$5.00$5.0016,800
1994-09-29$5.00$5.0012,200
1994-09-28$5.00$5.0023,000
1994-09-27$4.88$4.8815,000
1994-09-26$4.75$4.7521,900
1994-09-23$5.00$5.009,300
1994-09-22$5.00$5.0016,500
1994-09-21$4.75$4.7540,600
1994-09-20$5.00$5.0087,400
1994-09-19$5.00$5.00215,200
1994-09-16$4.75$4.75110,900
1994-09-15$4.63$4.6320,000
1994-09-14$4.63$4.6325,000
1994-09-13$4.75$4.7545,200
1994-09-12$4.69$4.6993,500
1994-09-09$4.75$4.7566,200
1994-09-08$4.75$4.7523,000
1994-09-07$4.75$4.7512,600
1994-09-06$4.75$4.7518,900
1994-09-02$4.88$4.888,400
1994-09-01$5.00$5.0015,400
1994-08-31$4.75$4.7541,000
1994-08-30$4.75$4.7515,100
1994-08-29$4.75$4.7526,300
1994-08-26$4.75$4.7551,200
1994-08-25$4.88$4.8821,100
1994-08-24$5.25$5.25158,700
1994-08-23$5.00$5.0082,200
1994-08-22$5.13$5.13602,000
1994-08-19$5.50$5.5020,900
1994-08-18$5.50$5.50111,100
1994-08-17$5.25$5.2541,200
1994-08-16$5.50$5.5014,700
1994-08-15$5.50$5.5010,500
1994-08-12$5.38$5.3818,300
1994-08-11$5.75$5.7514,800
1994-08-10$5.38$5.3829,600
1994-08-09$5.25$5.2540,900
1994-08-08$5.00$5.006,800
1994-08-05$4.94$4.9410,300
1994-08-04$5.00$5.006,100
1994-08-03$5.00$5.00168,400
1994-08-02$5.38$5.3820,300
1994-08-01$5.13$5.135,300
1994-07-29$5.19$5.193,400
1994-07-28$5.13$5.135,300
1994-07-27$5.25$5.2525,600
1994-07-26$5.38$5.3817,700
1994-07-25$5.38$5.3859,200
1994-07-22$5.50$5.50106,100
1994-07-21$5.25$5.2577,300
1994-07-20$5.13$5.1336,200
1994-07-19$5.13$5.1369,900
1994-07-18$5.25$5.2536,300
1994-07-15$5.25$5.25141,900
1994-07-14$5.00$5.0081,400
1994-07-13$5.00$5.0065,200
1994-07-12$5.38$5.3892,000
1994-07-11$5.88$5.8823,800
1994-07-08$5.88$5.8811,200
1994-07-07$6.00$6.0030,200
1994-07-06$6.38$6.3826,200
1994-07-05$6.50$6.5038,700
1994-07-01$6.50$6.505,000
1994-06-30$6.75$6.7522,700
1994-06-29$6.38$6.3810,000
1994-06-28$6.38$6.3873,400
1994-06-27$6.63$6.6317,300
1994-06-24$6.50$6.5011,300
1994-06-23$6.75$6.757,800
1994-06-22$6.63$6.6322,600
1994-06-21$6.88$6.8817,800
1994-06-20$7.13$7.1312,900
1994-06-17$7.06$7.0615,200
1994-06-16$7.00$7.0024,700
1994-06-15$7.06$7.0617,700
1994-06-14$7.38$7.384,500
1994-06-13$7.38$7.389,400
1994-06-10$7.00$7.003,400
1994-06-09$7.13$7.133,400
1994-06-08$7.13$7.1343,000
1994-06-07$7.25$7.2515,700
1994-06-06$7.13$7.1331,600
1994-06-03$7.50$7.5046,800
1994-06-02$7.25$7.2536,300
1994-06-01$7.13$7.13100
1994-05-31$7.00$7.0018,000
1994-05-27$6.75$6.75128,300
1994-05-26$6.88$6.8813,000
1994-05-25$7.13$7.1314,000
1994-05-24$7.13$7.1348,700
1994-05-23$6.88$6.8837,200
1994-05-20$6.88$6.888,800
1994-05-19$6.75$6.7515,200
1994-05-18$6.88$6.8817,300
1994-05-17$6.75$6.7523,600
1994-05-16$6.38$6.3867,900
1994-05-13$7.00$7.009,400
1994-05-12$7.13$7.136,500
1994-05-11$7.13$7.1336,700
1994-05-10$7.50$7.5021,600
1994-05-09$7.50$7.5016,800
1994-05-06$7.75$7.7533,300
1994-05-05$7.69$7.6942,300
1994-05-04$7.38$7.386,800
1994-05-03$7.50$7.5049,800
1994-05-02$7.63$7.6340,000
1994-04-29$7.75$7.75130,000
1994-04-28$8.13$8.13532,800
1994-04-26$7.13$7.1361,700
1994-04-25$6.50$6.5068,900
1994-04-22$6.25$6.2574,100
1994-04-21$6.38$6.3879,500
1994-04-20$6.00$6.0082,600
1994-04-19$6.13$6.13124,700
1994-04-18$6.50$6.5019,400
1994-04-15$6.38$6.3844,300
1994-04-14$6.38$6.3830,800
1994-04-13$6.50$6.50116,300
1994-04-12$6.88$6.8831,000
1994-04-11$7.13$7.1322,100
1994-04-08$7.06$7.068,500
1994-04-07$7.25$7.2514,100
1994-04-06$7.25$7.2510,700
1994-04-05$6.88$6.8821,900
1994-04-04$6.88$6.8862,900
1994-03-31$7.13$7.13117,700
1994-03-30$7.13$7.1352,800
1994-03-29$7.38$7.38140,800
1994-03-28$7.38$7.38125,200
1994-03-25$7.63$7.6376,100
1994-03-24$7.63$7.6366,700
1994-03-23$8.13$8.1359,800
1994-03-22$8.38$8.3854,200
1994-03-21$8.00$8.0041,500
1994-03-18$8.38$8.38127,400
1994-03-17$8.25$8.25416,800
1994-03-16$8.00$8.0061,600
1994-03-15$8.00$8.00119,700
1994-03-14$7.75$7.7551,600
1994-03-11$7.50$7.5015,800
1994-03-10$7.63$7.6325,900
1994-03-09$7.63$7.6315,200
1994-03-08$8.00$8.0031,700
1994-03-07$7.88$7.88172,000
1994-03-04$8.13$8.1392,400
1994-03-03$7.75$7.7562,000
1994-03-02$7.75$7.7558,500
1994-03-01$7.88$7.8880,200
1994-02-28$7.63$7.6343,100
1994-02-25$7.88$7.88137,300
1994-02-24$7.63$7.63354,700
1994-02-23$8.13$8.13261,000
1994-02-22$6.75$6.7524,700
1994-02-18$7.00$7.0020,500
1994-02-17$7.13$7.1326,600
1994-02-16$7.13$7.1364,400
1994-02-15$6.88$6.8882,100
1994-02-14$7.00$7.0021,200
1994-02-11$7.25$7.2513,900
1994-02-10$7.25$7.2545,400
1994-02-09$7.13$7.1323,700
1994-02-08$7.00$7.007,900
1994-02-07$7.00$7.0080,200
1994-02-04$7.00$7.0059,200
1994-02-03$7.38$7.3833,900
1994-02-02$7.63$7.6391,700
1994-02-01$7.88$7.88275,100
1994-01-31$7.88$7.88128,800
1994-01-28$7.63$7.63253,500
1994-01-27$7.38$7.3883,600
1994-01-26$7.00$7.0068,900
1994-01-25$7.00$7.0032,700
1994-01-24$7.00$7.0081,200
1994-01-21$6.38$6.3840,000
1994-01-20$6.50$6.503,700
1994-01-19$6.75$6.7512,100
1994-01-18$6.75$6.7534,100
1994-01-17$6.63$6.634,900
1994-01-14$6.63$6.6323,000
1994-01-13$6.63$6.6315,100
1994-01-12$6.63$6.6331,000
1994-01-11$6.88$6.8829,300
1994-01-10$7.00$7.0017,500
1994-01-07$7.13$7.1359,600
1994-01-06$6.75$6.7587,000
1994-01-05$7.00$7.0029,400
1994-01-04$7.13$7.138,700
1994-01-03$7.13$7.1324,800