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Winton Group’s iRhythm Holdings IRTC Stock Holding History

Winton Group’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
2025
Q3 		– Sell
-12,877
Closed -$1.98M – 876
2025
Q2 		$1.98M Buy
+12,877
New +$1.66M 0.1% 254
2024
Q1 		– Sell
-17,297
Closed -$1.85M – 744
2023
Q4 		$1.85M Buy
+17,297
New +$1.51M 0.13% 125
2023
Q2 		– Sell
-14,858
Closed -$1.84M – 937
2023
Q1 		$1.84M Buy
14,858
+9,258
+165% +$1M 0.11% 236
2022
Q4 		$525K Buy
+5,600
New +$610K 0.03% 610
2022
Q3 		– Sell
-9,883
Closed -$1.07M – 1015
2022
Q2 		$1.07M Buy
9,883
+3,561
+56% +$472K 0.06% 466
2022
Q1 		$996K Buy
6,322
+78
+1% +$10K 0.05% 461
2021
Q4 		$735K Sell
6,244
-6,763
-52% -$620K 0.04% 561
2021
Q3 		$762K Buy
13,007
+3,672
+39% +$195K 0.04% 643
2021
Q2 		$619K Buy
9,335
+2,105
+29% +$167K 0.03% 801
2021
Q1 		$1M Buy
7,230
+3,918
+118% +$702K 0.06% 459
2020
Q4 		$786K Sell
3,312
-9,528
-74% -$2.17M 0.06% 538
2020
Q3 		$3.06M Buy
+12,840
New +$2.27M 0.1% 321
2019
Q2 		– Sell
-3,472
Closed -$260K – 1207
2019
Q1 		$260K Buy
+3,472
New +$297K 0.01% 852
2018
Q4 		– Sell
-4,288
Closed -$406K – 945
2018
Q3 		$406K Sell
4,288
-1,592
-27% -$139K 0.01% 708
2018
Q2 		$477K Sell
5,880
-8,191
-58% -$573K 0.01% 649
2018
Q1 		$886K Buy
+14,071
New +$871K 0.03% 549

Other funds holding IRTC

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
Sands Capital Management
Sands Capital Management Arlington, Virginia $25.5B AUM 26.46% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
William Blair & Company
William Blair & Company Chicago, Illinois $34.9B AUM 18.88% 1-Year Est. Return
EAM
Eventide Asset Management Boston, Massachusetts $6.05B AUM 76.64% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Winton Group's IRTC Position: Q3 2025 in Review

Winton Group sold out of iRhythm Holdings (IRTC) in Q3 2025, closing a stake of 12,877 shares — an estimated $1.98M sold.

Winton Group first reported a position in IRTC in Q1 2018 and held it in 16 quarters. The position peaked at $3.06M in Q3 2020. 337 funds tracked by Wall St. Rank hold IRTC as of Q3 2025.

  • Winton Group reported no remaining iRhythm Holdings position as of Q3 2025 after selling out during the quarter.
  • Winton Group sold 12,877 iRhythm Holdings shares in Q3 2025, an estimated $1.98M.
  • Winton Group first reported a position in iRhythm Holdings in Q1 2018 and held it in 16 quarters.
  • Winton Group's iRhythm Holdings position peaked at $3.06M in Q3 2020.
  • 337 funds tracked by Wall St. Rank held iRhythm Holdings as of Q3 2025.

Based on Winton Group's 13F filing for Q3 2025, filed 13 Nov 2025.