Citadel Advisors’s Ionis Pharmaceuticals IONS Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $70.8M | Sell |
942,534
-1,192,102
| -56% | -$94.1M | 0.01% | 1072 |
|
|
2025
Q4 | $169M | Sell |
2,134,636
-267,429
| -11% | -$20.1M | 0.03% | 561 |
|
|
2025
Q3 | $157M | Buy |
2,402,065
+907,084
| +61% | +$44.3M | 0.02% | 590 |
|
|
2025
Q2 | $59.1M | Sell |
1,494,981
-1,985,081
| -57% | -$65M | 0.01% | 1114 |
|
|
2025
Q1 | $105M | Buy |
3,480,062
+1,314,146
| +61% | +$43M | 0.02% | 670 |
|
|
2024
Q4 | $75.7M | Buy |
2,165,916
+1,764,765
| +440% | +$66M | 0.01% | 928 |
|
|
2024
Q3 | $16.1M | Sell |
401,151
-225,882
| -36% | -$10.5M | ﹤0.01% | 2299 |
|
|
2024
Q2 | $29.9M | Buy |
627,033
+549,003
| +704% | +$22.5M | 0.01% | 1609 |
|
|
2024
Q1 | $3.38M | Sell |
78,030
-174,498
| -69% | -$8.32M | ﹤0.01% | 4583 |
|
|
2023
Q4 | $12.8M | Sell |
252,528
-283,390
| -53% | -$13.6M | ﹤0.01% | 2530 |
|
|
2023
Q3 | $24.3M | Sell |
535,918
-185,860
| -26% | -$7.67M | 0.01% | 1665 |
|
|
2023
Q2 | $29.6M | Buy |
721,778
+570,255
| +376% | +$21.9M | 0.01% | 1486 |
|
|
2023
Q1 | $5.42M | Sell |
151,523
-244,023
| -62% | -$9.16M | ﹤0.01% | 3680 |
|
|
2022
Q4 | $14.9M | Sell |
395,546
-22,686
| -5% | -$954K | ﹤0.01% | 2298 |
|
|
2022
Q3 | $18.5M | Sell |
418,232
-61,911
| -13% | -$2.61M | ﹤0.01% | 1961 |
|
|
2022
Q2 | $17.8M | Sell |
480,143
-764,381
| -61% | -$28.8M | ﹤0.01% | 1976 |
|
|
2022
Q1 | $46.1M | Buy |
1,244,524
+22,953
| +2% | +$751K | 0.01% | 1174 |
|
|
2021
Q4 | $37.2M | Buy |
1,221,571
+171,714
| +16% | +$5.4M | 0.01% | 1420 |
|
|
2021
Q3 | $35.2M | Buy |
1,049,857
+504,377
| +92% | +$19M | 0.01% | 1424 |
|
|
2021
Q2 | $21.8M | Buy |
545,480
+375,631
| +221% | +$14.7M | ﹤0.01% | 1983 |
|
|
2021
Q1 | $7.64M | Sell |
169,849
-455,141
| -73% | -$25.4M | ﹤0.01% | 3421 |
|
|
2020
Q4 | $35.3M | Sell |
624,990
-1,344,523
| -68% | -$67M | 0.01% | 1245 |
|
|
2020
Q3 | $93.5M | Buy |
1,969,513
+706,888
| +56% | +$39.3M | 0.03% | 495 |
|
|
2020
Q2 | $74.4M | Sell |
1,262,625
-476,367
| -27% | -$26.5M | 0.03% | 554 |
|
|
2020
Q1 | $82.2M | Buy |
1,738,992
+1,271,995
| +272% | +$70.9M | 0.04% | 419 |
|
|
2019
Q4 | $28.2M | Buy |
466,997
+417,717
| +848% | +$24.9M | 0.01% | 1182 |
|
|
2019
Q3 | $2.95M | Sell |
49,280
-533,549
| -92% | -$34.8M | ﹤0.01% | 3863 |
|
|
2019
Q2 | $37.5M | Buy |
582,829
+427,750
| +276% | +$30.2M | 0.02% | 910 |
|
|
2019
Q1 | $12.6M | Buy |
155,079
+50,125
| +48% | +$3.23M | 0.01% | 1803 |
|
|
2018
Q4 | $5.67M | Buy |
104,954
+70,691
| +206% | +$3.61M | ﹤0.01% | 2610 |
|
|
2018
Q3 | $1.77M | Sell |
34,263
-23,103
| -40% | -$1.09M | ﹤0.01% | 4609 |
|
|
2018
Q2 | $2.39M | Sell |
57,366
-294,487
| -84% | -$13.1M | ﹤0.01% | 3823 |
|
|
2018
Q1 | $15.5M | Buy |
351,853
+208,395
| +145% | +$10.6M | 0.01% | 1333 |
|
|
2017
Q4 | $7.22M | Buy |
+143,458
| New | +$7.87M | ﹤0.01% | 2054 |
|
|
2017
Q3 | – | Sell |
-115,828
| Closed | -$6.07M | – | 7754 |
|
|
2017
Q2 | $5.89M | Sell |
115,828
-41
| -0% | -$1.91K | 0.01% | 1945 |
|
|
2017
Q1 | $4.66M | Buy |
115,869
+107,464
| +1,279% | +$4.83M | ﹤0.01% | 2124 |
|
|
2016
Q4 | $402K | Sell |
8,405
-339,858
| -98% | -$13.4M | ﹤0.01% | 5243 |
|
|
2016
Q3 | $12.8M | Buy |
+348,263
| New | +$10.9M | 0.01% | 1158 |
|
|
2016
Q2 | – | Sell |
-192,216
| Closed | -$6.2M | – | 7075 |
|
|
2016
Q1 | $7.79M | Buy |
+192,216
| New | +$7.81M | 0.01% | 1389 |
|
|
2015
Q3 | – | Sell |
-312,428
| Closed | -$16.2M | – | 9048 |
|
|
2015
Q2 | $18M | Buy |
312,428
+219,578
| +236% | +$14M | 0.02% | 1069 |
|
|
2015
Q1 | $5.91M | Buy |
92,850
+11,659
| +14% | +$791K | 0.01% | 1868 |
|
|
2014
Q4 | $5.01M | Sell |
81,191
-63,078
| -44% | -$3.11M | ﹤0.01% | 1973 |
|
|
2014
Q3 | $5.6M | Buy |
144,269
+82,077
| +132% | +$2.91M | 0.01% | 1884 |
|
|
2014
Q2 | $2.14M | Buy |
62,192
+50,761
| +444% | +$1.6M | ﹤0.01% | 2667 |
|
|
2014
Q1 | $494K | Sell |
11,431
-83,802
| -88% | -$4.06M | ﹤0.01% | 4359 |
|
|
2013
Q4 | $3.79M | Buy |
+95,233
| New | +$3.39M | ﹤0.01% | 1909 |
|
|
2013
Q3 | – | Sell |
-7,515
| Closed | -$224K | – | 6787 |
|
|
2013
Q2 | $202K | Buy |
+7,515
| New | +$160K | ﹤0.01% | 4662 |
|
Other funds holding IONS
VPM
VCM
Citadel Advisors's IONS Position: Q1 2026 in Review
Citadel Advisors reduced its Ionis Pharmaceuticals (IONS) stake by 56% in Q1 2026, selling an estimated $94.1M and leaving 942,534 shares worth $70.8M. The position accounts for 0.01% of the portfolio, ranked #1072.
Citadel Advisors first reported a position in IONS in Q2 2013 and has held it in 47 quarters since. The position peaked at $169M in Q4 2025. 493 funds tracked by Wall St. Rank hold IONS as of Q1 2026.
- Citadel Advisors held 942,534 shares of Ionis Pharmaceuticals worth $70.8M as of Q1 2026.
- Citadel Advisors sold 1,192,102 Ionis Pharmaceuticals shares in Q1 2026, an estimated $94.1M.
- Ionis Pharmaceuticals made up 0.01% of Citadel Advisors's portfolio in Q1 2026, its #1072 holding.
- Citadel Advisors first reported a position in Ionis Pharmaceuticals in Q2 2013 and has held it in 47 quarters since.
- Citadel Advisors's Ionis Pharmaceuticals position peaked at $169M in Q4 2025.
- 493 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.