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
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 $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

Jane Street's IRTC Position: Q1 2026 in Review

Jane Street reduced its iRhythm Holdings (IRTC) stake by 41% in Q1 2026, selling an estimated $11.5M and leaving 112,864 shares worth $13.3M. The position accounts for ﹤0.01% of the portfolio, ranked #2193.

Jane Street first reported a position in IRTC in Q4 2017 and has held it in 28 quarters since. The position peaked at $34.1M in Q4 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • Jane Street held 112,864 shares of iRhythm Holdings worth $13.3M as of Q1 2026.
  • Jane Street sold 79,527 iRhythm Holdings shares in Q1 2026, an estimated $11.5M.
  • iRhythm Holdings made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #2193 holding.
  • Jane Street first reported a position in iRhythm Holdings in Q4 2017 and has held it in 28 quarters since.
  • Jane Street's iRhythm Holdings position peaked at $34.1M in Q4 2025.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.