California State Teachers Retirement System (CalSTRS)
IONS icon

California State Teachers Retirement System (CalSTRS)’s Ionis Pharmaceuticals IONS Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio IONS Stock Details IONS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$13.3M Buy
176,485
+32,312
+22% +$2.55M 0.01% 613
2025
Q4 		$11.4M Sell
144,173
-939
-0.6% -$70.7K 0.01% 605
2025
Q3 		$9.49M Buy
145,112
+8
+0% +$391 0.01% 659
2025
Q2 		$5.73M Buy
145,104
+12,866
+10% +$421K 0.01% 837
2025
Q1 		$3.99M Sell
132,238
-1,664
-1% -$54.5K ﹤0.01% 981
2024
Q4 		$4.68M Buy
133,902
+7,722
+6% +$289K 0.01% 944
2024
Q3 		$5.05M Sell
126,180
-3,036
-2% -$141K 0.01% 914
2024
Q2 		$6.16M Sell
129,216
-2,602
-2% -$107K 0.01% 789
2024
Q1 		$5.71M Sell
131,818
-6,714
-5% -$320K 0.01% 854
2023
Q4 		$7.01M Sell
138,532
-7,050
-5% -$338K 0.01% 763
2023
Q3 		$6.6M Sell
145,582
-15,416
-10% -$636K 0.01% 765
2023
Q2 		$6.61M Sell
160,998
-4,182
-3% -$161K 0.01% 812
2023
Q1 		$5.9M Sell
165,180
-2,695
-2% -$101K 0.01% 854
2022
Q4 		$6.34M Buy
167,875
+1,950
+1% +$82K 0.01% 821
2022
Q3 		$7.34M Sell
165,925
-3,489
-2% -$147K 0.01% 725
2022
Q2 		$6.27M Buy
169,414
+1,052
+0.6% +$39.7K 0.01% 826
2022
Q1 		$6.24M Sell
168,362
-15,642
-9% -$512K 0.01% 937
2021
Q4 		$5.6M Sell
184,004
-41,987
-19% -$1.32M 0.01% 1077
2021
Q3 		$7.58M Sell
225,991
-17,731
-7% -$668K 0.01% 945
2021
Q2 		$9.72M Sell
243,722
-1,361
-0.6% -$53.3K 0.01% 844
2021
Q1 		$11M Buy
245,083
+2,468
+1% +$138K 0.01% 766
2020
Q4 		$13.7M Buy
242,615
+4,376
+2% +$218K 0.02% 648
2020
Q3 		$11.3M Sell
238,239
-5,360
-2% -$298K 0.02% 645
2020
Q2 		$14.4M Buy
243,599
+21,452
+10% +$1.19M 0.03% 529
2020
Q1 		$10.5M Sell
222,147
-5,722
-3% -$319K 0.02% 550
2019
Q4 		$13.8M Buy
227,869
+15,622
+7% +$931K 0.02% 573
2019
Q3 		$12.7M Buy
212,247
+2,456
+1% +$160K 0.02% 570
2019
Q2 		$13.5M Buy
209,791
+12,182
+6% +$861K 0.03% 547
2019
Q1 		$16M Buy
197,609
+808
+0.4% +$52.1K 0.03% 471
2018
Q4 		$10.6M Buy
196,801
+4,629
+2% +$236K 0.02% 565
2018
Q3 		$9.91M Sell
192,172
-68
-0% -$3.19K 0.02% 669
2018
Q2 		$8.01M Buy
192,240
+3,023
+2% +$134K 0.02% 765
2018
Q1 		$8.34M Sell
189,217
-6,633
-3% -$337K 0.02% 719
2017
Q4 		$9.85M Sell
195,850
-3,063
-2% -$168K 0.02% 659
2017
Q3 		$10.1M Sell
198,913
-21,195
-10% -$1.11M 0.02% 633
2017
Q2 		$11.2M Sell
220,108
-19,031
-8% -$886K 0.02% 612
2017
Q1 		$9.61M Sell
239,139
-11,000
-4% -$494K 0.02% 710
2016
Q4 		$12M Sell
250,139
-6,700
-3% -$265K 0.02% 612
2016
Q3 		$9.41M Buy
256,839
+2,100
+0.8% +$65.7K 0.02% 708
2016
Q2 		$5.93M Buy
254,739
+366
+0.1% +$11.8K 0.01% 925
2016
Q1 		$10.3M Buy
254,373
+32,547
+15% +$1.32M 0.02% 661
2015
Q4 		$13.7M Buy
221,826
+3,486
+2% +$188K 0.03% 496
2015
Q3 		$8.82M Sell
218,340
-300
-0.1% -$15.5K 0.02% 656
2015
Q2 		$12.6M Buy
218,640
+3,259
+2% +$207K 0.03% 556
2015
Q1 		$13.7M Sell
215,381
-3,800
-2% -$258K 0.03% 534
2014
Q4 		$13.5M Buy
219,181
+2,128
+1% +$105K 0.03% 536
2014
Q3 		$8.43M Buy
217,053
+2,432
+1% +$86.2K 0.02% 702
2014
Q2 		$7.39M Buy
214,621
+10,300
+5% +$324K 0.02% 792
2014
Q1 		$8.83M Buy
204,321
+1,000
+0.5% +$48.5K 0.02% 662
2013
Q4 		$8.1M Buy
203,321
+1,300
+0.6% +$46.3K 0.02% 699
2013
Q3 		$7.58M Buy
202,021
+6,307
+3% +$188K 0.02% 686
2013
Q2 		$5.26M Buy
+195,714
New +$4.16M 0.02% 812

Other funds holding IONS

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

California State Teachers Retirement System (CalSTRS)'s IONS Position: Q1 2026 in Review

California State Teachers Retirement System (CalSTRS) increased its Ionis Pharmaceuticals (IONS) stake by 22% in Q1 2026, buying an estimated $2.55M and bringing the position to 176,485 shares worth $13.3M. The position accounts for 0.01% of the portfolio, ranked #613.

California State Teachers Retirement System (CalSTRS) first reported a position in IONS in Q2 2013 and has held it in 52 quarters since. The position peaked at $16M in Q1 2019. 493 funds tracked by Wall St. Rank hold IONS as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 176,485 shares of Ionis Pharmaceuticals worth $13.3M as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 32,312 Ionis Pharmaceuticals shares in Q1 2026, an estimated $2.55M.
  • Ionis Pharmaceuticals made up 0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #613 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Ionis Pharmaceuticals in Q2 2013 and has held it in 52 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Ionis Pharmaceuticals position peaked at $16M in Q1 2019.
  • 493 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q1 2026, filed 18 May 2026.