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Polar Capital Holdings’s iRhythm Holdings IRTC Stock Holding History

Polar Capital Holdings’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 		$54.5M Buy
458,089
+36,477
+9% +$4.24M 0.13% 116
2026
Q1 		$49.8M Buy
421,612
+113,512
+37% +$16.4M 0.18% 97
2025
Q4 		$54.7M Sell
308,100
-27,808
-8% -$4.93M 0.21% 92
2025
Q3 		$57.8M Buy
335,908
+334,558
+24,782% +$53.2M 0.28% 91
2025
Q2 		$208K Sell
1,350
-48,423
-97% -$6.26M ﹤0.01% 265
2025
Q1 		$5.21M Hold
49,773
– – 0.03% 226
2024
Q4 		$4.49M Sell
49,773
-7,392
-13% -$581K 0.03% 250
2024
Q3 		$4.24M Sell
57,165
-19,566
-25% -$1.56M 0.02% 247
2024
Q2 		$8.26M Buy
76,731
+13,255
+21% +$1.35M 0.05% 202
2024
Q1 		$7.36M Buy
63,476
+60,329
+1,917% +$6.78M 0.04% 220
2023
Q4 		$337K Sell
3,147
-1,960
-38% -$171K ﹤0.01% 264
2023
Q3 		$481K Sell
5,107
-1,718
-25% -$175K ﹤0.01% 266
2023
Q2 		$712K Buy
6,825
+425
+7% +$51K ﹤0.01% 269
2023
Q1 		$794K Buy
6,400
+650
+11% +$70.5K 0.01% 271
2022
Q4 		$539K Hold
5,750
– – ﹤0.01% 287
2022
Q3 		$720K Hold
5,750
– – ﹤0.01% 311
2022
Q2 		$621K Sell
5,750
-3,941
-41% -$522K ﹤0.01% 336
2022
Q1 		$1.53M Buy
+9,691
New +$1.24M 0.01% 315
2021
Q2 		– Sell
-1,615
Closed -$224K – 367
2021
Q1 		$224K Sell
1,615
-3,856
-70% -$691K ﹤0.01% 320
2020
Q4 		$1.3M Buy
+5,471
New +$1.25M 0.01% 283

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

Polar Capital Holdings's IRTC Position: Q2 2026 in Review

Polar Capital Holdings increased its iRhythm Holdings (IRTC) stake by 8.7% in Q2 2026, buying an estimated $4.24M and bringing the position to 458,089 shares worth $54.5M. The position accounts for 0.13% of the portfolio, ranked #116.

Polar Capital Holdings first reported a position in IRTC in Q4 2020 and has held it in 20 quarters since. The position peaked at $57.8M in Q3 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Polar Capital Holdings held 458,089 shares of iRhythm Holdings worth $54.5M as of Q2 2026.
  • Polar Capital Holdings bought 36,477 iRhythm Holdings shares in Q2 2026, an estimated $4.24M.
  • iRhythm Holdings made up 0.13% of Polar Capital Holdings's portfolio in Q2 2026, its #116 holding.
  • Polar Capital Holdings first reported a position in iRhythm Holdings in Q4 2020 and has held it in 20 quarters since.
  • Polar Capital Holdings's iRhythm Holdings position peaked at $57.8M in Q3 2025.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Polar Capital Holdings's 13F filing for Q2 2026, filed 14 Aug 2026.