California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s iRhythm Holdings IRTC Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio IRTC Stock Details IRTC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$4.4M Buy
37,324
+6,763
+22% +$976K ﹤0.01% 1083
2025
Q4 		$5.42M Buy
30,561
+440
+1% +$78K 0.01% 882
2025
Q3 		$5.18M Buy
30,121
+1,204
+4% +$191K 0.01% 916
2025
Q2 		$4.45M Buy
28,917
+99
+0.3% +$12.8K ﹤0.01% 957
2025
Q1 		$3.02M Sell
28,818
-400
-1% -$42.4K ﹤0.01% 1117
2024
Q4 		$2.63M Sell
29,218
-217
-0.7% -$17.1K ﹤0.01% 1246
2024
Q3 		$2.19M Sell
29,435
-942
-3% -$75K ﹤0.01% 1361
2024
Q2 		$3.27M Sell
30,377
-273
-0.9% -$27.9K ﹤0.01% 1085
2024
Q1 		$3.56M Sell
30,650
-1,635
-5% -$184K ﹤0.01% 1077
2023
Q4 		$3.46M Sell
32,285
-1,433
-4% -$125K ﹤0.01% 1112
2023
Q3 		$3.18M Sell
33,718
-3,297
-9% -$335K ﹤0.01% 1121
2023
Q2 		$3.86M Sell
37,015
-661
-2% -$79.4K 0.01% 1106
2023
Q1 		$4.67M Sell
37,676
-493
-1% -$53.5K 0.01% 1000
2022
Q4 		$3.58M Buy
38,169
+750
+2% +$81.6K 0.01% 1133
2022
Q3 		$4.69M Sell
37,419
-433
-1% -$62.5K 0.01% 950
2022
Q2 		$4.09M Buy
37,852
+193
+0.5% +$25.6K 0.01% 1060
2022
Q1 		$5.93M Sell
37,659
-3,230
-8% -$415K 0.01% 965
2021
Q4 		$4.81M Buy
40,889
+970
+2% +$89K 0.01% 1183
2021
Q3 		$2.34M Sell
39,919
-728
-2% -$38.6K ﹤0.01% 1643
2021
Q2 		$2.7M Sell
40,647
-3,011
-7% -$239K ﹤0.01% 1605
2021
Q1 		$6.06M Sell
43,658
-41
-0.1% -$7.35K 0.01% 1056
2020
Q4 		$10.4M Buy
43,699
+2,185
+5% +$498K 0.01% 757
2020
Q3 		$9.88M Buy
41,514
+714
+2% +$126K 0.02% 697
2020
Q2 		$4.73M Buy
40,800
+559
+1% +$61.6K 0.01% 983
2020
Q1 		$3.27M Sell
40,241
-199
-0.5% -$16.5K 0.01% 1038
2019
Q4 		$2.75M Buy
40,440
+1,898
+5% +$129K ﹤0.01% 1377
2019
Q3 		$2.86M Buy
38,542
+440
+1% +$34.1K 0.01% 1312
2019
Q2 		$3.01M Buy
38,102
+1,179
+3% +$85.9K 0.01% 1301
2019
Q1 		$2.77M Sell
36,923
-821
-2% -$70.2K 0.01% 1321
2018
Q4 		$2.62M Buy
37,744
+852
+2% +$64.6K 0.01% 1292
2018
Q3 		$3.49M Buy
36,892
+524
+1% +$45.6K 0.01% 1256
2018
Q2 		$2.95M Buy
36,368
+14,647
+67% +$1.02M 0.01% 1354
2018
Q1 		$1.37M Sell
21,721
-762
-3% -$47.2K ﹤0.01% 1768
2017
Q4 		$1.26M Buy
22,483
+418
+2% +$21.8K ﹤0.01% 1867
2017
Q3 		$1.15M Sell
22,065
-2,335
-10% -$106K ﹤0.01% 1929
2017
Q2 		$1.04M Buy
24,400
+10,300
+73% +$375K ﹤0.01% 2031
2017
Q1 		$530K Sell
14,100
-700
-5% -$24.1K ﹤0.01% 2452
2016
Q4 		$444K Buy
+14,800
New +$399K ﹤0.01% 2581

Other funds holding IRTC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

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

California State Teachers Retirement System (CalSTRS) increased its iRhythm Holdings (IRTC) stake by 22% in Q1 2026, buying an estimated $976K and bringing the position to 37,324 shares worth $4.4M. The position accounts for ﹤0.01% of the portfolio, ranked #1083.

California State Teachers Retirement System (CalSTRS) first reported a position in IRTC in Q4 2016 and has held it in 38 quarters since. The position peaked at $10.4M in Q4 2020. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 37,324 shares of iRhythm Holdings worth $4.4M as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 6,763 iRhythm Holdings shares in Q1 2026, an estimated $976K.
  • iRhythm Holdings made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #1083 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in iRhythm Holdings in Q4 2016 and has held it in 38 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s iRhythm Holdings position peaked at $10.4M in Q4 2020.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

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