Artisan Partners
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Artisan Partners’s iRhythm Holdings IRTC Stock Holding History

Artisan Partners’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 		$197M Buy
1,660,307
+209,400
+14% +$24.3M 0.31% 78
2026
Q1 		$171M Sell
1,450,907
-61,085
-4% -$8.81M 0.27% 85
2025
Q4 		$268M Sell
1,511,992
-1,055,521
-41% -$187M 0.4% 62
2025
Q3 		$442M Sell
2,567,513
-173,328
-6% -$27.5M 0.63% 41
2025
Q2 		$422M Sell
2,740,841
-73,439
-3% -$9.49M 0.62% 44
2025
Q1 		$295M Buy
2,814,280
+51,546
+2% +$5.46M 0.48% 57
2024
Q4 		$249M Sell
2,762,734
-17,525
-0.6% -$1.38M 0.37% 67
2024
Q3 		$206M Buy
2,780,259
+94,974
+4% +$7.56M 0.31% 83
2024
Q2 		$289M Buy
2,685,285
+540,343
+25% +$55.2M 0.43% 63
2024
Q1 		$249M Buy
2,144,942
+73,442
+4% +$8.26M 0.36% 71
2023
Q4 		$222M Buy
2,071,500
+108,875
+6% +$9.49M 0.34% 81
2023
Q3 		$185M Buy
1,962,625
+359,908
+22% +$36.6M 0.31% 81
2023
Q2 		$167M Buy
1,602,717
+229,398
+17% +$27.5M 0.27% 89
2023
Q1 		$170M Sell
1,373,319
-22,427
-2% -$2.43M 0.28% 88
2022
Q4 		$131M Buy
1,395,746
+973,450
+231% +$106M 0.23% 103
2022
Q3 		$52.9M Buy
422,296
+133,826
+46% +$19.3M 0.09% 197
2022
Q2 		$31.2M Sell
288,470
-40,063
-12% -$5.31M 0.05% 236
2022
Q1 		$51.7M Buy
328,533
+177,630
+118% +$22.8M 0.07% 230
2021
Q4 		$17.8M Buy
+150,903
New +$13.8M 0.02% 304
2021
Q2 		– Sell
-776,301
Closed -$108M – 349
2021
Q1 		$108M Sell
776,301
-580,563
-43% -$104M 0.14% 165
2020
Q4 		$322M Buy
1,356,864
+951,511
+235% +$217M 0.39% 80
2020
Q3 		$96.5M Buy
405,353
+251,874
+164% +$44.6M 0.14% 153
2020
Q2 		$17.8M Buy
153,479
+20,484
+15% +$2.26M 0.03% 273
2020
Q1 		$10.8M Buy
+132,995
New +$11M 0.02% 265

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
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
BNP Paribas Asset Management
BNP Paribas Asset Management Paris, France $99.8B AUM 45.22% 1-Year Est. Return

Artisan Partners's IRTC Position: Q2 2026 in Review

Artisan Partners increased its iRhythm Holdings (IRTC) stake by 14% in Q2 2026, buying an estimated $24.3M and bringing the position to 1,660,307 shares worth $197M. The position accounts for 0.31% of the portfolio, ranked #78.

Artisan Partners first reported a position in IRTC in Q1 2020 and has held it in 24 quarters since. The position peaked at $442M in Q3 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Artisan Partners held 1,660,307 shares of iRhythm Holdings worth $197M as of Q2 2026.
  • Artisan Partners bought 209,400 iRhythm Holdings shares in Q2 2026, an estimated $24.3M.
  • iRhythm Holdings made up 0.31% of Artisan Partners's portfolio in Q2 2026, its #78 holding.
  • Artisan Partners first reported a position in iRhythm Holdings in Q1 2020 and has held it in 24 quarters since.
  • Artisan Partners's iRhythm Holdings position peaked at $442M in Q3 2025.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Artisan Partners's 13F filing for Q2 2026, filed 13 Aug 2026.