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 — 1995

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1995-12-29$13.13$13.13157,100
1995-12-28$13.25$13.25287,200
1995-12-27$13.63$13.63248,700
1995-12-26$13.63$13.63323,500
1995-12-22$13.13$13.13157,700
1995-12-21$13.25$13.25191,700
1995-12-20$13.13$13.1366,500
1995-12-19$13.13$13.13193,000
1995-12-18$13.13$13.13170,000
1995-12-15$13.00$13.00206,400
1995-12-14$12.63$12.63165,200
1995-12-13$12.50$12.50307,000
1995-12-12$12.25$12.25162,700
1995-12-11$11.63$11.6398,200
1995-12-08$11.63$11.6336,200
1995-12-07$12.00$12.0068,300
1995-12-06$12.38$12.3846,000
1995-12-05$12.25$12.25209,900
1995-12-04$12.50$12.50191,300
1995-12-01$11.88$11.88184,700
1995-11-30$11.38$11.38298,500
1995-11-29$11.13$11.13124,800
1995-11-28$10.50$10.5087,400
1995-11-27$10.69$10.69122,200
1995-11-24$10.38$10.3841,400
1995-11-22$10.50$10.5094,800
1995-11-21$10.63$10.6326,400
1995-11-20$10.25$10.2589,900
1995-11-17$10.88$10.8833,900
1995-11-16$10.88$10.88110,200
1995-11-15$10.50$10.5087,900
1995-11-14$10.63$10.63120,100
1995-11-13$11.13$11.13127,800
1995-11-10$10.88$10.8837,100
1995-11-09$10.75$10.7573,600
1995-11-08$10.88$10.8844,700
1995-11-07$11.00$11.00170,700
1995-11-06$10.00$10.0054,000
1995-11-03$10.25$10.2559,500
1995-11-02$10.13$10.1338,600
1995-11-01$10.50$10.5041,900
1995-10-31$10.13$10.13209,300
1995-10-30$10.13$10.1351,400
1995-10-27$10.25$10.2564,300
1995-10-26$10.88$10.88125,800
1995-10-25$10.88$10.8858,500
1995-10-24$11.00$11.0024,800
1995-10-23$10.88$10.88260,900
1995-10-20$11.13$11.1361,100
1995-10-19$11.00$11.00131,900
1995-10-18$11.63$11.63122,700
1995-10-17$11.13$11.1384,700
1995-10-16$11.00$11.00402,100
1995-10-13$10.50$10.50195,100
1995-10-12$10.38$10.38153,100
1995-10-11$10.13$10.13444,800
1995-10-10$9.88$9.88243,200
1995-10-09$9.63$9.63327,800
1995-10-06$10.00$10.001,452,700
1995-10-05$10.31$10.3188,000
1995-10-04$10.38$10.38178,800
1995-10-03$10.50$10.50213,700
1995-10-02$10.00$10.00198,700
1995-09-29$11.63$11.6390,700
1995-09-28$11.88$11.88117,600
1995-09-27$12.00$12.00228,500
1995-09-26$12.00$12.00113,800
1995-09-25$12.38$12.38102,500
1995-09-22$12.38$12.38266,300
1995-09-21$12.31$12.31607,400
1995-09-20$12.25$12.25168,000
1995-09-19$12.50$12.5023,400
1995-09-18$12.63$12.6347,200
1995-09-15$12.75$12.7552,200
1995-09-14$13.13$13.13105,000
1995-09-13$13.63$13.63243,700
1995-09-12$12.50$12.5053,400
1995-09-11$12.25$12.25141,600
1995-09-08$12.88$12.8830,300
1995-09-07$13.13$13.13108,600
1995-09-06$13.13$13.13204,700
1995-09-05$12.25$12.25206,100
1995-09-01$11.88$11.88130,700
1995-08-31$12.13$12.13105,000
1995-08-30$12.25$12.25180,700
1995-08-29$12.19$12.19166,700
1995-08-28$12.88$12.88145,400
1995-08-25$13.13$13.1358,500
1995-08-24$13.00$13.00216,700
1995-08-23$13.13$13.13152,100
1995-08-22$13.63$13.6373,600
1995-08-21$14.25$14.25155,100
1995-08-18$13.75$13.7576,600
1995-08-17$14.25$14.2552,400
1995-08-16$14.50$14.5082,300
1995-08-15$14.75$14.75112,000
1995-08-14$15.00$15.00268,600
1995-08-11$13.75$13.75114,200
1995-08-10$13.63$13.63281,400
1995-08-09$14.00$14.00155,600
1995-08-08$14.75$14.75113,800
1995-08-07$14.75$14.75322,100
1995-08-04$15.00$15.00191,500
1995-08-03$14.63$14.63485,500
1995-08-02$14.31$14.31555,100
1995-08-01$13.63$13.63509,800
1995-07-31$13.00$13.00100,600
1995-07-28$12.50$12.5092,200
1995-07-27$12.13$12.1319,200
1995-07-26$12.13$12.13127,100
1995-07-25$12.50$12.5097,200
1995-07-24$12.25$12.2560,100
1995-07-21$12.38$12.3850,200
1995-07-20$12.13$12.13224,600
1995-07-19$12.38$12.38438,300
1995-07-18$12.00$12.0028,300
1995-07-17$12.13$12.1327,900
1995-07-14$11.88$11.8836,200
1995-07-13$12.25$12.25133,400
1995-07-12$13.25$13.25167,500
1995-07-11$13.13$13.13420,200
1995-07-10$12.00$12.00208,400
1995-07-07$11.63$11.63112,100
1995-07-06$11.69$11.69176,600
1995-07-05$12.00$12.0088,200
1995-07-03$12.63$12.6325,200
1995-06-30$12.63$12.63341,400
1995-06-29$12.25$12.25344,100
1995-06-28$11.00$11.0066,700
1995-06-27$11.13$11.1325,300
1995-06-26$11.50$11.50115,400
1995-06-23$11.25$11.25171,800
1995-06-22$11.50$11.50117,400
1995-06-21$11.13$11.1397,900
1995-06-20$11.00$11.00106,300
1995-06-19$11.25$11.25159,700
1995-06-16$12.25$12.2598,900
1995-06-15$12.25$12.25151,500
1995-06-14$12.00$12.00147,600
1995-06-13$12.13$12.13269,100
1995-06-12$11.88$11.88572,100
1995-06-09$11.00$11.0061,600
1995-06-08$11.00$11.0059,400
1995-06-07$10.75$10.7591,100
1995-06-06$10.50$10.50110,200
1995-06-05$10.25$10.25113,700
1995-06-02$10.75$10.75111,000
1995-06-01$11.25$11.25450,200
1995-05-31$11.50$11.50933,600
1995-05-30$10.06$10.06175,800
1995-05-26$10.13$10.13272,000
1995-05-25$10.75$10.75578,700
1995-05-24$12.00$12.001,620,600
1995-05-23$12.00$12.00718,900
1995-05-22$10.38$10.38515,800
1995-05-19$9.69$9.69249,300
1995-05-18$9.75$9.75547,200
1995-05-17$8.88$8.88375,900
1995-05-16$8.00$8.0094,100
1995-05-15$7.97$7.97226,900
1995-05-12$8.25$8.25663,600
1995-05-11$9.13$9.13368,000
1995-05-10$8.25$8.25204,100
1995-05-09$8.13$8.13634,800
1995-05-08$8.13$8.13749,000
1995-05-05$7.00$7.0011,500
1995-05-04$7.00$7.005,300
1995-05-03$6.88$6.8835,900
1995-05-02$6.97$6.979,600
1995-05-01$6.81$6.8168,100
1995-04-28$7.00$7.0029,800
1995-04-27$7.09$7.09209,900
1995-04-26$6.88$6.8834,700
1995-04-25$6.88$6.8835,200
1995-04-24$6.88$6.88155,800
1995-04-21$6.63$6.6351,700
1995-04-20$6.50$6.50102,500
1995-04-19$7.00$7.0058,500
1995-04-18$7.00$7.0053,500
1995-04-17$7.38$7.38155,800
1995-04-13$7.00$7.0041,600
1995-04-12$6.75$6.7565,900
1995-04-11$6.38$6.38100,100
1995-04-10$6.13$6.1334,400
1995-04-07$6.00$6.0066,200
1995-04-06$6.38$6.38101,700
1995-04-05$6.38$6.3829,100
1995-04-04$6.25$6.2569,500
1995-04-03$6.38$6.38121,500
1995-03-31$6.63$6.6320,800
1995-03-30$6.50$6.5030,400
1995-03-29$6.50$6.5044,100
1995-03-28$6.75$6.7539,300
1995-03-27$6.63$6.6319,400
1995-03-24$6.81$6.81202,400
1995-03-23$6.38$6.3824,900
1995-03-22$6.38$6.38117,300
1995-03-21$6.50$6.5095,800
1995-03-20$6.63$6.63216,500
1995-03-17$7.00$7.00124,400
1995-03-16$7.50$7.5048,600
1995-03-15$7.44$7.4481,200
1995-03-14$7.50$7.50121,500
1995-03-13$8.00$8.00156,400
1995-03-10$8.38$8.38297,300
1995-03-09$8.13$8.13406,500
1995-03-08$7.50$7.5067,200
1995-03-07$7.63$7.63137,000
1995-03-06$7.75$7.75235,300
1995-03-03$7.63$7.63416,100
1995-03-02$7.63$7.63593,100
1995-03-01$6.50$6.50458,700
1995-02-28$5.63$5.6311,500
1995-02-27$5.88$5.8827,100
1995-02-24$5.88$5.8839,500
1995-02-23$5.75$5.7542,500
1995-02-22$5.75$5.7537,000
1995-02-21$5.63$5.63108,900
1995-02-17$5.75$5.7521,900
1995-02-16$5.50$5.5016,800
1995-02-15$5.63$5.6363,200
1995-02-14$5.25$5.2565,900
1995-02-13$5.25$5.2570,400
1995-02-10$5.50$5.5017,800
1995-02-09$5.69$5.6940,700
1995-02-08$5.88$5.8850,000
1995-02-07$6.06$6.06115,200
1995-02-06$6.06$6.06149,600
1995-02-03$6.00$6.0057,600
1995-02-02$5.88$5.88156,600
1995-02-01$5.75$5.7559,300
1995-01-31$5.88$5.88147,300
1995-01-30$5.75$5.7598,600
1995-01-27$4.88$4.8880,300
1995-01-26$4.75$4.7590,900
1995-01-25$4.63$4.6354,200
1995-01-24$4.88$4.8879,000
1995-01-23$4.75$4.7538,700
1995-01-20$4.88$4.8834,600
1995-01-19$4.75$4.7515,800
1995-01-18$4.75$4.7532,400
1995-01-17$4.69$4.6948,200
1995-01-16$5.00$5.0066,400
1995-01-13$4.88$4.8833,400
1995-01-12$4.88$4.8847,500
1995-01-11$4.88$4.8824,800
1995-01-10$4.94$4.94134,100
1995-01-09$5.00$5.0087,800
1995-01-06$4.75$4.75153,900
1995-01-05$4.38$4.38116,700
1995-01-04$4.00$4.0022,800
1995-01-03$3.75$3.75208,300