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 — 1993

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1993-12-31$6.75$6.7528,300
1993-12-30$6.88$6.8830,800
1993-12-29$6.88$6.8826,900
1993-12-28$7.00$7.0032,000
1993-12-27$7.00$7.0065,700
1993-12-23$6.50$6.5094,800
1993-12-22$6.25$6.2529,700
1993-12-21$6.25$6.2572,300
1993-12-20$6.13$6.1327,100
1993-12-17$6.13$6.1347,200
1993-12-16$6.25$6.2518,200
1993-12-15$6.63$6.6311,300
1993-12-14$6.50$6.5037,300
1993-12-13$6.38$6.3811,600
1993-12-10$6.63$6.6317,000
1993-12-09$6.38$6.3823,300
1993-12-08$6.50$6.50121,900
1993-12-07$6.88$6.8835,100
1993-12-06$6.88$6.8820,000
1993-12-03$6.75$6.7517,300
1993-12-02$6.63$6.6339,500
1993-12-01$6.75$6.7528,200
1993-11-30$6.63$6.6362,500
1993-11-29$7.13$7.1310,400
1993-11-26$7.25$7.254,500
1993-11-24$7.38$7.3835,900
1993-11-23$6.88$6.8812,000
1993-11-22$7.00$7.00122,200
1993-11-19$7.13$7.1326,000
1993-11-18$7.13$7.13159,700
1993-11-17$7.25$7.2536,200
1993-11-16$7.38$7.3831,600
1993-11-15$7.38$7.3856,700
1993-11-12$7.50$7.5051,300
1993-11-11$7.50$7.5063,500
1993-11-10$7.63$7.6340,300
1993-11-09$7.63$7.6338,800
1993-11-08$7.50$7.5032,900
1993-11-05$7.50$7.5026,700
1993-11-04$7.50$7.5034,400
1993-11-03$7.63$7.6381,700
1993-11-02$7.88$7.8839,600
1993-11-01$7.88$7.8852,400
1993-10-29$8.00$8.0030,000
1993-10-28$7.88$7.8835,400
1993-10-27$7.63$7.6329,800
1993-10-26$7.63$7.6351,600
1993-10-25$8.00$8.00169,400
1993-10-22$7.38$7.3841,300
1993-10-21$7.13$7.1350,500
1993-10-20$7.00$7.0059,000
1993-10-19$7.00$7.00113,100
1993-10-18$7.63$7.63127,600
1993-10-15$8.00$8.00379,000
1993-10-14$8.25$8.251,040,900
1993-10-13$7.00$7.00388,700
1993-10-12$6.50$6.50231,600
1993-10-11$6.00$6.0030,100
1993-10-08$6.13$6.138,800
1993-10-07$5.75$5.7518,400
1993-10-06$5.88$5.8823,000
1993-10-05$6.00$6.0031,200
1993-10-04$6.25$6.2528,200
1993-10-01$6.38$6.3833,200
1993-09-30$6.25$6.2541,800
1993-09-29$6.13$6.1351,100
1993-09-28$6.00$6.00103,600
1993-09-27$6.00$6.0030,700
1993-09-24$6.00$6.0023,200
1993-09-23$5.88$5.8834,200
1993-09-22$5.63$5.63107,100
1993-09-21$5.63$5.6314,000
1993-09-20$5.63$5.6363,400
1993-09-17$5.75$5.7511,900
1993-09-16$5.75$5.7549,800
1993-09-15$5.75$5.7518,100
1993-09-14$5.88$5.8830,900
1993-09-13$6.00$6.006,300
1993-09-10$6.13$6.1310,400
1993-09-09$6.00$6.0029,700
1993-09-08$6.50$6.5023,500
1993-09-07$6.50$6.5030,700
1993-09-03$6.13$6.1332,500
1993-09-02$6.38$6.3859,000
1993-09-01$6.25$6.2550,500
1993-08-31$6.25$6.2516,200
1993-08-30$6.13$6.1315,800
1993-08-27$5.75$5.7510,100
1993-08-26$5.88$5.8821,100
1993-08-25$5.75$5.7514,800
1993-08-24$6.13$6.1311,000
1993-08-23$6.13$6.1323,800
1993-08-20$6.25$6.25138,500
1993-08-19$6.00$6.0090,000
1993-08-18$6.00$6.0061,700
1993-08-17$5.75$5.7546,400
1993-08-16$5.75$5.7535,200
1993-08-13$5.50$5.5015,300
1993-08-12$5.50$5.5010,500
1993-08-11$5.75$5.755,400
1993-08-10$5.75$5.7528,900
1993-08-09$5.75$5.7521,200
1993-08-06$5.88$5.8813,100
1993-08-05$5.50$5.505,900
1993-08-04$5.50$5.5016,400
1993-08-03$5.50$5.5015,900
1993-08-02$5.50$5.5019,200
1993-07-30$5.88$5.8830,000
1993-07-29$5.50$5.5025,700
1993-07-28$5.75$5.7516,900
1993-07-27$5.63$5.6341,000
1993-07-26$5.75$5.7517,800
1993-07-23$5.63$5.6354,500
1993-07-22$5.75$5.7532,700
1993-07-21$6.13$6.1371,000
1993-07-20$6.00$6.0044,600
1993-07-19$6.00$6.0016,100
1993-07-16$6.13$6.1312,300
1993-07-15$6.13$6.1311,500
1993-07-14$6.25$6.2529,100
1993-07-13$6.13$6.13103,800
1993-07-12$6.50$6.5017,000
1993-07-09$6.38$6.3812,400
1993-07-08$6.63$6.6315,600
1993-07-07$6.50$6.508,500
1993-07-06$6.50$6.5022,500
1993-07-02$6.13$6.1329,800
1993-07-01$6.38$6.3833,300
1993-06-30$6.38$6.3815,000
1993-06-29$6.63$6.6381,000
1993-06-28$6.75$6.7518,600
1993-06-25$6.75$6.755,100
1993-06-24$6.50$6.5052,600
1993-06-23$6.63$6.6319,700
1993-06-22$6.63$6.6332,600
1993-06-21$6.63$6.6311,500
1993-06-18$6.50$6.5022,300
1993-06-17$6.63$6.6325,300
1993-06-16$6.50$6.5068,500
1993-06-15$6.50$6.5072,200
1993-06-14$6.63$6.6320,700
1993-06-11$6.63$6.6333,200
1993-06-10$7.00$7.0048,700
1993-06-09$7.00$7.0025,500
1993-06-08$6.75$6.7540,600
1993-06-07$7.00$7.0019,300
1993-06-04$6.88$6.8881,000
1993-06-03$6.88$6.8818,700
1993-06-02$6.75$6.7552,400
1993-06-01$6.75$6.7524,400
1993-05-28$6.75$6.757,900
1993-05-27$6.75$6.7588,100
1993-05-26$6.88$6.8833,200
1993-05-25$6.88$6.8829,900
1993-05-24$6.88$6.8818,100
1993-05-21$7.00$7.0061,400
1993-05-20$6.75$6.75111,400
1993-05-19$6.88$6.8814,000
1993-05-18$6.63$6.6340,900
1993-05-17$6.63$6.6311,000
1993-05-14$6.88$6.8819,500
1993-05-13$6.75$6.7523,400
1993-05-12$6.88$6.8883,400
1993-05-11$7.13$7.1332,400
1993-05-10$7.13$7.1321,400
1993-05-07$7.38$7.3847,800
1993-05-06$7.38$7.38127,600
1993-05-05$6.75$6.7544,700
1993-05-04$6.75$6.75134,300
1993-05-03$6.50$6.5090,800
1993-04-30$5.88$5.8835,700
1993-04-29$6.00$6.0027,200
1993-04-28$6.13$6.1383,100
1993-04-27$6.00$6.0025,500
1993-04-26$5.75$5.7523,200
1993-04-23$5.88$5.8828,400
1993-04-22$5.88$5.88132,400
1993-04-21$5.75$5.7576,700
1993-04-20$5.88$5.8834,600
1993-04-19$5.75$5.7534,100
1993-04-16$5.75$5.753,400
1993-04-15$5.75$5.7533,500
1993-04-14$5.75$5.7526,100
1993-04-13$5.75$5.7512,900
1993-04-12$5.88$5.8828,400
1993-04-08$5.88$5.8831,400
1993-04-07$6.00$6.0079,100
1993-04-06$5.88$5.8866,900
1993-04-05$6.13$6.1317,100
1993-04-02$6.13$6.1330,300
1993-04-01$6.00$6.0055,000
1993-03-31$6.13$6.13126,000
1993-03-30$6.00$6.0090,700
1993-03-29$5.88$5.88149,800
1993-03-26$5.75$5.7518,200
1993-03-25$5.88$5.8834,600
1993-03-24$5.75$5.7521,600
1993-03-23$5.88$5.8866,300
1993-03-22$5.88$5.8890,200
1993-03-19$5.88$5.8836,300
1993-03-18$5.88$5.8841,400
1993-03-17$6.00$6.0073,900
1993-03-16$5.88$5.88169,400
1993-03-15$6.00$6.0054,600
1993-03-12$6.00$6.0097,200
1993-03-11$6.00$6.00115,900
1993-03-10$6.00$6.0082,000
1993-03-09$6.25$6.2591,100
1993-03-08$6.25$6.25101,800
1993-03-05$6.00$6.00422,400
1993-03-04$6.00$6.0044,400
1993-03-03$5.88$5.88233,600
1993-03-02$6.13$6.1385,400
1993-03-01$5.88$5.88228,100
1993-02-26$6.00$6.0080,800
1993-02-25$6.00$6.00169,600
1993-02-24$6.00$6.00131,500
1993-02-23$6.00$6.00136,800
1993-02-22$6.25$6.25124,400
1993-02-19$6.50$6.5071,900
1993-02-18$6.63$6.63127,800
1993-02-17$6.75$6.75187,000
1993-02-16$6.50$6.5074,400
1993-02-12$6.75$6.7549,200
1993-02-11$7.00$7.0061,000
1993-02-10$6.63$6.63321,100
1993-02-09$6.63$6.6361,600
1993-02-08$6.88$6.88198,400
1993-02-05$7.25$7.2567,500
1993-02-04$7.25$7.2595,500
1993-02-03$7.38$7.3875,100
1993-02-02$7.25$7.25135,900
1993-02-01$7.25$7.25111,400
1993-01-29$7.13$7.13145,800
1993-01-28$7.63$7.63173,900
1993-01-27$7.75$7.75215,800
1993-01-26$7.75$7.75217,900
1993-01-25$7.88$7.88138,800
1993-01-22$7.75$7.75237,100
1993-01-21$7.63$7.631,796,200
1993-01-20$8.25$8.25119,500
1993-01-19$8.25$8.2564,500
1993-01-18$9.00$9.0029,300
1993-01-15$9.25$9.2581,400
1993-01-14$9.75$9.759,500
1993-01-13$10.00$10.0041,800
1993-01-12$10.75$10.7543,800
1993-01-11$11.00$11.0082,000
1993-01-08$10.25$10.2580,700
1993-01-07$9.50$9.5037,400
1993-01-06$9.25$9.2583,200
1993-01-05$9.63$9.6357,400
1993-01-04$9.75$9.7521,500