Jane Street
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Jane Street’s iRhythm Holdings IRTC Stock Holding History

Jane Street’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
Q2 		$2.41M Buy
20,300
+9,800
+93% +$1.14M ﹤0.01% 4848
2026
Q1 		$1.24M Buy
10,500
+8,500
+425% +$1.23M ﹤0.01% 6052
2025
Q4 		$355K Sell
2,000
-62,400
-97% -$11.1M ﹤0.01% 8455
2025
Q3 		$11.1M Buy
64,400
+54,400
+544% +$8.65M ﹤0.01% 2293
2025
Q2 		$1.54M Sell
10,000
-27,100
-73% -$3.5M ﹤0.01% 4849
2025
Q1 		$3.88M Buy
37,100
+15,300
+70% +$1.62M ﹤0.01% 3306
2024
Q4 		$1.97M Sell
21,800
-27,700
-56% -$2.18M ﹤0.01% 4132
2024
Q3 		$3.67M Buy
+49,500
New +$3.94M ﹤0.01% 3372
2024
Q2 		– Sell
-3,600
Closed -$418K – 9774
2024
Q1 		$418K Sell
3,600
-3,400
-49% -$382K ﹤0.01% 7008
2023
Q4 		$749K Sell
7,000
-8,600
-55% -$749K ﹤0.01% 6090
2023
Q3 		$1.47M Buy
15,600
+2,500
+19% +$254K ﹤0.01% 4551
2023
Q2 		$1.37M Sell
13,100
-4,300
-25% -$516K ﹤0.01% 4732
2023
Q1 		$2.16M Sell
17,400
-39,400
-69% -$4.27M ﹤0.01% 3694
2022
Q4 		$5.32M Buy
56,800
+35,600
+168% +$3.87M ﹤0.01% 2389
2022
Q3 		$2.66M Sell
21,200
-2,900
-12% -$419K ﹤0.01% 3672
2022
Q2 		$2.6M Sell
24,100
-26,800
-53% -$3.55M ﹤0.01% 3688
2022
Q1 		$8.02M Buy
50,900
+23,500
+86% +$3.02M ﹤0.01% 2296
2021
Q4 		$3.23M Sell
27,400
-27,300
-50% -$2.5M ﹤0.01% 3568
2021
Q3 		$3.2M Buy
54,700
+32,400
+145% +$1.72M ﹤0.01% 3537
2021
Q2 		$1.48M Sell
22,300
-26,500
-54% -$2.1M ﹤0.01% 4968
2021
Q1 		$6.78M Buy
48,800
+21,800
+81% +$3.91M ﹤0.01% 1992
2020
Q4 		$6.41M Buy
27,000
+24,700
+1,074% +$5.63M ﹤0.01% 1831
2020
Q3 		$548K Buy
2,300
+100
+5% +$17.7K ﹤0.01% 5009
2020
Q2 		$255K Sell
2,200
-13,400
-86% -$1.48M ﹤0.01% 6073
2020
Q1 		$1.27M Buy
+15,600
New +$1.29M ﹤0.01% 2524

Other funds holding IRTC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
EAM
Eventide Asset Management Boston, Massachusetts $7.48B AUM 104.76% 1-Year Est. Return

Jane Street's IRTC Position: Q2 2026 in Review

Jane Street increased its iRhythm Holdings (IRTC) stake by 144% in Q2 2026, buying an estimated $18.9M and bringing the position to 275,262 shares worth $32.7M. The position accounts for ﹤0.01% of the portfolio, ranked #1731.

Jane Street first reported a position in IRTC in Q4 2017 and has held it in 29 quarters since. The position peaked at $34.1M in Q4 2025. 303 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Jane Street held 275,262 shares of iRhythm Holdings worth $32.7M as of Q2 2026.
  • Jane Street bought 162,398 iRhythm Holdings shares in Q2 2026, an estimated $18.9M.
  • iRhythm Holdings made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #1731 holding.
  • Jane Street first reported a position in iRhythm Holdings in Q4 2017 and has held it in 29 quarters since.
  • Jane Street's iRhythm Holdings position peaked at $34.1M in Q4 2025.
  • 303 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.