State of Wisconsin Investment Board’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 | $7.25M | Buy |
96,491
+1,730
| +2% | +$137K | 0.02% | 829 |
|
|
2025
Q4 | $7.5M | Sell |
94,761
-2,076
| -2% | -$156K | 0.02% | 824 |
|
|
2025
Q3 | $6.34M | Buy |
96,837
+143
| +0.1% | +$6.98K | 0.01% | 859 |
|
|
2025
Q2 | $3.82M | Sell |
96,694
-11,622
| -11% | -$380K | 0.01% | 1028 |
|
|
2025
Q1 | $3.27M | Buy |
108,316
+7,085
| +7% | +$232K | 0.01% | 1071 |
|
|
2024
Q4 | $3.54M | Buy |
101,231
+15,065
| +17% | +$563K | 0.01% | 1084 |
|
|
2024
Q3 | $3.45M | Sell |
86,166
-1,534
| -2% | -$71.4K | 0.01% | 1103 |
|
|
2024
Q2 | $4.18M | Sell |
87,700
-4,115
| -4% | -$169K | 0.01% | 1003 |
|
|
2024
Q1 | $3.98M | Sell |
91,815
-11,750
| -11% | -$560K | 0.01% | 1030 |
|
|
2023
Q4 | $5.24M | Sell |
103,565
-2,200
| -2% | -$105K | 0.01% | 958 |
|
|
2023
Q3 | $4.8M | Sell |
105,765
-3,545
| -3% | -$146K | 0.02% | 942 |
|
|
2023
Q2 | $4.48M | Sell |
109,310
-5,941
| -5% | -$228K | 0.01% | 1013 |
|
|
2023
Q1 | $4.12M | Sell |
115,251
-12,976
| -10% | -$487K | 0.01% | 1067 |
|
|
2022
Q4 | $4.84M | Sell |
128,227
-1,627
| -1% | -$68.4K | 0.02% | 961 |
|
|
2022
Q3 | $5.74M | Sell |
129,854
-7,379
| -5% | -$311K | 0.02% | 861 |
|
|
2022
Q2 | $5.08M | Buy |
137,233
+22,782
| +20% | +$859K | 0.01% | 983 |
|
|
2022
Q1 | $4.24M | Buy |
114,451
+97,397
| +571% | +$3.19M | 0.01% | 1223 |
|
|
2021
Q4 | $519K | Sell |
17,054
-525
| -3% | -$16.5K | ﹤0.01% | 1672 |
|
|
2021
Q3 | $590K | Buy |
17,579
+830
| +5% | +$31.3K | ﹤0.01% | 1641 |
|
|
2021
Q2 | $668K | Sell |
16,749
-55,456
| -77% | -$2.17M | ﹤0.01% | 1593 |
|
|
2021
Q1 | $3.25M | Sell |
72,205
-27,880
| -28% | -$1.55M | 0.01% | 1141 |
|
|
2020
Q4 | $5.66M | Buy |
100,085
+24,349
| +32% | +$1.21M | 0.01% | 945 |
|
|
2020
Q3 | $3.59M | Sell |
75,736
-200
| -0.3% | -$11.1K | 0.01% | 1034 |
|
|
2020
Q2 | $4.48M | Buy |
75,936
+5,760
| +8% | +$320K | 0.01% | 920 |
|
|
2020
Q1 | $3.32M | Sell |
70,176
-17,980
| -20% | -$1M | 0.01% | 926 |
|
|
2019
Q4 | $5.33M | Sell |
88,156
-1,547
| -2% | -$92.2K | 0.01% | 915 |
|
|
2019
Q3 | $5.37M | Sell |
89,703
-2,999
| -3% | -$195K | 0.01% | 806 |
|
|
2019
Q2 | $5.96M | Buy |
92,702
+69,321
| +296% | +$4.9M | 0.02% | 777 |
|
|
2019
Q1 | $1.9M | Sell |
23,381
-580
| -2% | -$37.4K | 0.01% | 1021 |
|
|
2018
Q4 | $1.29M | Hold |
23,961
| – | – | ﹤0.01% | 1062 |
|
|
2018
Q3 | $1.24M | Sell |
23,961
-500
| -2% | -$23.5K | ﹤0.01% | 1140 |
|
|
2018
Q2 | $1.02M | Sell |
24,461
-310
| -1% | -$13.7K | ﹤0.01% | 1161 |
|
|
2018
Q1 | $1.09M | Sell |
24,771
-573
| -2% | -$29.1K | ﹤0.01% | 1105 |
|
|
2017
Q4 | $1.27M | Buy |
25,344
+209
| +0.8% | +$11.5K | ﹤0.01% | 1048 |
|
|
2017
Q3 | $1.27M | Buy |
25,135
+519
| +2% | +$27.2K | ﹤0.01% | 1032 |
|
|
2017
Q2 | $1.25M | Buy |
24,616
+550
| +2% | +$25.6K | ﹤0.01% | 1017 |
|
|
2017
Q1 | $967K | Sell |
24,066
-41,851
| -63% | -$1.88M | ﹤0.01% | 1038 |
|
|
2016
Q4 | $3.15M | Sell |
65,917
-11,113
| -14% | -$440K | 0.01% | 870 |
|
|
2016
Q3 | $2.82M | Sell |
77,030
-3,000
| -4% | -$93.9K | 0.01% | 983 |
|
|
2016
Q2 | $1.86M | Buy |
80,030
+70,030
| +700% | +$2.26M | 0.01% | 1112 |
|
|
2016
Q1 | $405K | Buy |
+10,000
| New | +$406K | ﹤0.01% | 1281 |
|
|
2015
Q4 | – | Sell |
-89,310
| Closed | -$3.61M | – | 1318 |
|
|
2015
Q3 | $3.61M | Sell |
89,310
-2,590
| -3% | -$134K | 0.01% | 897 |
|
|
2015
Q2 | $5.29M | Buy |
+91,900
| New | +$5.84M | 0.02% | 816 |
|
|
2014
Q3 | – | Sell |
-130,000
| Closed | -$4.48M | – | 1339 |
|
|
2014
Q2 | $4.48M | Buy |
+130,000
| New | +$4.09M | 0.02% | 867 |
|
Other funds holding IONS
VPM
VCM
State of Wisconsin Investment Board's IONS Position: Q1 2026 in Review
State of Wisconsin Investment Board increased its Ionis Pharmaceuticals (IONS) stake by 1.8% in Q1 2026, buying an estimated $137K and bringing the position to 96,491 shares worth $7.25M. The position accounts for 0.02% of the portfolio, ranked #829.
State of Wisconsin Investment Board first reported a position in IONS in Q2 2014 and has held it in 44 quarters since. The position peaked at $7.5M in Q4 2025. 494 funds tracked by Wall St. Rank hold IONS as of Q1 2026.
- State of Wisconsin Investment Board held 96,491 shares of Ionis Pharmaceuticals worth $7.25M as of Q1 2026.
- State of Wisconsin Investment Board bought 1,730 Ionis Pharmaceuticals shares in Q1 2026, an estimated $137K.
- Ionis Pharmaceuticals made up 0.02% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #829 holding.
- State of Wisconsin Investment Board first reported a position in Ionis Pharmaceuticals in Q2 2014 and has held it in 44 quarters since.
- State of Wisconsin Investment Board's Ionis Pharmaceuticals position peaked at $7.5M in Q4 2025.
- 494 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.
Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.