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.

View year

Historical Stock Price — 2024

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2024-12-31$34.96$34.961,080,500
2024-12-30$34.92$34.921,184,900
2024-12-27$35.91$35.911,004,600
2024-12-26$36.33$36.331,005,800
2024-12-24$36.53$36.53502,700
2024-12-23$36.08$36.081,816,100
2024-12-20$35.63$35.634,063,400
2024-12-19$35.59$35.591,894,500
2024-12-18$36.25$36.251,653,800
2024-12-17$37.68$37.681,408,800
2024-12-16$38.10$38.103,063,600
2024-12-13$36.61$36.611,070,400
2024-12-12$37.01$37.011,464,300
2024-12-11$37.99$37.991,078,100
2024-12-10$38.26$38.261,042,100
2024-12-09$38.58$38.581,868,300
2024-12-06$38.11$38.111,817,000
2024-12-05$36.75$36.751,488,100
2024-12-04$37.15$37.151,374,000
2024-12-03$35.81$35.811,341,900
2024-12-02$36.10$36.101,459,000
2024-11-29$35.73$35.73622,400
2024-11-27$35.90$35.90977,200
2024-11-26$35.37$35.371,340,900
2024-11-25$35.46$35.462,076,800
2024-11-22$34.01$34.012,422,600
2024-11-21$33.94$33.941,954,500
2024-11-20$35.40$35.402,223,100
2024-11-19$33.75$33.751,526,500
2024-11-18$33.73$33.731,722,200
2024-11-15$34.34$34.341,801,700
2024-11-14$37.23$37.231,921,200
2024-11-13$37.78$37.78914,200
2024-11-12$37.77$37.77937,000
2024-11-11$38.88$38.88825,700
2024-11-08$39.19$39.191,019,400
2024-11-07$38.46$38.46986,000
2024-11-06$39.04$39.041,728,500
2024-11-05$38.80$38.801,273,500
2024-11-04$38.44$38.441,190,300
2024-11-01$38.76$38.76739,900
2024-10-31$38.39$38.39910,000
2024-10-30$39.26$39.26748,700
2024-10-29$39.71$39.711,182,700
2024-10-28$40.36$40.361,000,000
2024-10-25$39.19$39.191,036,000
2024-10-24$38.77$38.77859,800
2024-10-23$38.42$38.421,054,500
2024-10-22$38.68$38.68881,400
2024-10-21$39.00$39.001,643,200
2024-10-18$39.68$39.681,343,100
2024-10-17$38.49$38.491,891,400
2024-10-16$39.16$39.162,114,600
2024-10-15$37.84$37.841,060,300
2024-10-14$38.63$38.63949,500
2024-10-11$38.44$38.441,264,900
2024-10-10$37.95$37.951,238,300
2024-10-09$38.06$38.061,402,800
2024-10-08$37.80$37.801,454,800
2024-10-07$37.86$37.861,579,300
2024-10-04$37.91$37.911,301,300
2024-10-03$37.81$37.812,301,000
2024-10-02$39.38$39.381,556,300
2024-10-01$39.07$39.071,688,600
2024-09-30$40.06$40.061,895,200
2024-09-27$40.85$40.852,338,000
2024-09-26$41.10$41.101,678,500
2024-09-25$40.99$40.99996,800
2024-09-24$41.00$41.002,565,700
2024-09-23$41.83$41.831,582,200
2024-09-20$42.76$42.762,566,900
2024-09-19$42.74$42.741,655,500
2024-09-18$42.36$42.361,485,000
2024-09-17$41.51$41.511,474,700
2024-09-16$40.70$40.702,048,500
2024-09-13$42.19$42.192,232,400
2024-09-12$41.02$41.024,596,800
2024-09-11$42.53$42.532,517,200
2024-09-10$42.39$42.3911,521,900
2024-09-09$48.33$48.331,828,800
2024-09-06$46.89$46.891,334,900
2024-09-05$48.15$48.15845,300
2024-09-04$47.65$47.651,351,900
2024-09-03$47.31$47.311,518,600
2024-08-30$47.68$47.682,110,400
2024-08-29$49.90$49.901,279,100
2024-08-28$49.25$49.25940,000
2024-08-27$48.35$48.35923,900
2024-08-26$46.80$46.80711,200
2024-08-23$46.92$46.92773,500
2024-08-22$47.54$47.54630,700
2024-08-21$48.18$48.18720,900
2024-08-20$47.33$47.33624,400
2024-08-19$47.64$47.64876,900
2024-08-16$46.46$46.46543,200
2024-08-15$46.67$46.67515,100
2024-08-14$46.85$46.851,633,400
2024-08-13$46.91$46.91791,100
2024-08-12$47.06$47.06528,000
2024-08-09$46.55$46.55782,700
2024-08-08$47.51$47.51915,000
2024-08-07$46.81$46.81694,200
2024-08-06$47.03$47.032,627,400
2024-08-05$47.00$47.001,280,800
2024-08-02$49.13$49.131,352,500
2024-08-01$51.32$51.321,503,000
2024-07-31$49.46$49.461,081,900
2024-07-30$49.78$49.781,134,000
2024-07-29$50.24$50.24976,600
2024-07-26$51.45$51.45766,400
2024-07-25$51.86$51.861,751,000
2024-07-24$50.74$50.741,664,800
2024-07-23$50.43$50.431,385,100
2024-07-22$50.61$50.611,791,700
2024-07-19$47.82$47.821,090,300
2024-07-18$47.33$47.331,133,700
2024-07-17$47.96$47.961,222,500
2024-07-16$49.84$49.841,963,000
2024-07-15$47.57$47.57888,800
2024-07-12$48.00$48.001,597,700
2024-07-11$47.31$47.311,830,200
2024-07-10$47.85$47.85886,900
2024-07-09$47.04$47.041,027,900
2024-07-08$47.24$47.241,072,100
2024-07-05$46.09$46.09624,500
2024-07-03$45.60$45.601,069,900
2024-07-02$45.14$45.141,720,300
2024-07-01$47.11$47.112,448,600
2024-06-28$47.66$47.662,626,200
2024-06-27$47.23$47.231,982,900
2024-06-26$47.70$47.702,531,100
2024-06-25$47.00$47.002,662,400
2024-06-24$44.68$44.684,717,200
2024-06-21$41.83$41.831,685,200
2024-06-20$40.81$40.81835,600
2024-06-18$40.64$40.64950,500
2024-06-17$40.76$40.76795,300
2024-06-14$40.65$40.651,392,000
2024-06-13$41.12$41.12861,500
2024-06-12$41.50$41.501,280,300
2024-06-11$39.69$39.69857,900
2024-06-10$39.79$39.79897,600
2024-06-07$38.95$38.95665,300
2024-06-06$39.87$39.87536,400
2024-06-05$39.87$39.87870,500
2024-06-04$40.05$40.05966,700
2024-06-03$38.77$38.771,150,100
2024-05-31$37.57$37.571,396,700
2024-05-30$36.55$36.55891,500
2024-05-29$36.45$36.451,103,700
2024-05-28$37.64$37.64575,500
2024-05-24$37.28$37.28676,200
2024-05-23$38.00$38.001,319,900
2024-05-22$38.00$38.001,231,100
2024-05-21$37.37$37.371,980,900
2024-05-20$38.72$38.721,272,800
2024-05-17$37.31$37.311,363,100
2024-05-16$37.62$37.623,313,900
2024-05-15$39.21$39.211,256,300
2024-05-14$38.27$38.27983,100
2024-05-13$38.80$38.801,045,300
2024-05-10$39.08$39.08895,100
2024-05-09$39.47$39.471,300,600
2024-05-08$40.16$40.161,527,100
2024-05-07$40.93$40.931,211,800
2024-05-06$42.28$42.28928,300
2024-05-03$41.97$41.971,375,100
2024-05-02$43.09$43.09666,300
2024-05-01$43.01$43.011,066,600
2024-04-30$41.26$41.26843,300
2024-04-29$41.99$41.99709,900
2024-04-26$41.59$41.59556,100
2024-04-25$41.84$41.841,142,800
2024-04-24$42.45$42.45731,400
2024-04-23$41.84$41.84631,200
2024-04-22$41.07$41.07705,200
2024-04-19$40.68$40.68846,000
2024-04-18$40.81$40.81990,600
2024-04-17$40.91$40.911,176,200
2024-04-16$41.54$41.541,101,500
2024-04-15$41.55$41.55789,500
2024-04-12$41.74$41.74829,900
2024-04-11$42.50$42.50869,800
2024-04-10$42.94$42.94825,900
2024-04-09$42.83$42.83847,000
2024-04-08$42.24$42.24868,900
2024-04-05$43.22$43.22597,000
2024-04-04$42.83$42.831,103,700
2024-04-03$43.78$43.781,457,100
2024-04-02$43.00$43.00907,000
2024-04-01$43.94$43.94699,400
2024-03-28$43.35$43.351,999,000
2024-03-27$44.66$44.66886,200
2024-03-26$44.11$44.11935,600
2024-03-25$43.91$43.91875,100
2024-03-22$42.72$42.72752,500
2024-03-21$42.75$42.75691,500
2024-03-20$42.78$42.78542,100
2024-03-19$42.16$42.161,011,500
2024-03-18$42.03$42.03968,300
2024-03-15$42.55$42.551,251,400
2024-03-14$42.18$42.181,324,800
2024-03-13$43.16$43.161,110,600
2024-03-12$43.17$43.17798,900
2024-03-11$43.26$43.26974,800
2024-03-08$43.99$43.991,060,000
2024-03-07$44.67$44.67995,600
2024-03-06$44.29$44.29977,700
2024-03-05$44.19$44.19814,300
2024-03-04$44.87$44.871,224,500
2024-03-01$45.46$45.461,495,600
2024-02-29$45.21$45.211,231,000
2024-02-28$46.54$46.541,141,800
2024-02-27$47.41$47.411,921,700
2024-02-26$46.10$46.101,420,200
2024-02-23$45.36$45.361,703,800
2024-02-22$43.98$43.981,350,800
2024-02-21$43.53$43.532,095,200
2024-02-20$44.35$44.351,999,600
2024-02-16$44.43$44.432,106,100
2024-02-15$45.28$45.282,914,000
2024-02-14$49.07$49.07758,300
2024-02-13$48.61$48.611,067,000
2024-02-12$50.38$50.38951,300
2024-02-09$51.40$51.40787,900
2024-02-08$49.98$49.98672,600
2024-02-07$49.54$49.54610,800
2024-02-06$49.12$49.121,220,600
2024-02-05$49.43$49.43897,700
2024-02-02$49.75$49.75901,300
2024-02-01$50.97$50.97611,200
2024-01-31$51.39$51.39981,600
2024-01-30$51.90$51.90962,700
2024-01-29$52.01$52.01720,600
2024-01-26$51.49$51.49964,300
2024-01-25$51.58$51.58992,500
2024-01-24$50.60$50.601,042,200
2024-01-23$51.81$51.811,000,000
2024-01-22$51.01$51.011,441,700
2024-01-19$50.98$50.983,070,900
2024-01-18$50.65$50.651,220,000
2024-01-17$51.29$51.291,852,000
2024-01-16$51.03$51.031,593,000
2024-01-12$53.54$53.54860,400
2024-01-11$53.55$53.551,197,700
2024-01-10$52.21$52.21781,200
2024-01-09$52.88$52.881,007,600
2024-01-08$52.32$52.321,037,800
2024-01-05$50.70$50.701,015,500
2024-01-04$51.48$51.481,269,900
2024-01-03$51.59$51.591,646,200
2024-01-02$52.87$52.872,098,200