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 		$932K Buy
7,900
+4,400
+126% +$635K ﹤0.01% 6664
2025
Q4 		$621K Sell
3,500
-92,900
-96% -$16.5M ﹤0.01% 7206
2025
Q3 		$16.6M Hold
96,400
– – ﹤0.01% 1836
2025
Q2 		$14.8M Sell
96,400
-600
-0.6% -$77.5K ﹤0.01% 1737
2025
Q1 		$10.2M Buy
97,000
+1,000
+1% +$106K ﹤0.01% 1975
2024
Q4 		$8.66M Sell
96,000
-5,200
-5% -$409K ﹤0.01% 2031
2024
Q3 		$7.51M Buy
101,200
+9,600
+10% +$765K ﹤0.01% 2261
2024
Q2 		$9.86M Buy
91,600
+18,200
+25% +$1.86M ﹤0.01% 2065
2024
Q1 		$8.51M Buy
73,400
+21,000
+40% +$2.36M ﹤0.01% 1983
2023
Q4 		$5.61M Sell
52,400
-14,400
-22% -$1.25M ﹤0.01% 2700
2023
Q3 		$6.3M Sell
66,800
-95,600
-59% -$9.72M ﹤0.01% 2312
2023
Q2 		$16.9M Buy
162,400
+80,300
+98% +$9.64M 0.01% 1371
2023
Q1 		$10.2M Buy
82,100
+300
+0.4% +$32.5K ﹤0.01% 1618
2022
Q4 		$7.66M Buy
81,800
+15,500
+23% +$1.69M ﹤0.01% 1925
2022
Q3 		$8.31M Buy
66,300
+64,200
+3,057% +$9.27M ﹤0.01% 1897
2022
Q2 		$227K Sell
2,100
-1,800
-46% -$238K ﹤0.01% 8020
2022
Q1 		$614K Sell
3,900
-300
-7% -$38.5K ﹤0.01% 7094
2021
Q4 		$494K Sell
4,200
-73,200
-95% -$6.72M ﹤0.01% 7295
2021
Q3 		$4.53M Sell
77,400
-30,800
-28% -$1.63M ﹤0.01% 2900
2021
Q2 		$7.18M Buy
108,200
+97,000
+866% +$7.69M ﹤0.01% 2119
2021
Q1 		$1.55M Buy
11,200
+5,200
+87% +$932K ﹤0.01% 4514
2020
Q4 		$1.42M Buy
6,000
+3,100
+107% +$707K ﹤0.01% 4083
2020
Q3 		$691K Sell
2,900
-1,300
-31% -$230K ﹤0.01% 4667
2020
Q2 		$487K Buy
+4,200
New +$463K ﹤0.01% 5121
2018
Q4 		– Sell
-15,000
Closed -$1.42M – 5316
2018
Q3 		$1.42M Buy
+15,000
New +$1.31M ﹤0.01% 2323

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.