Simplex Trading
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Simplex Trading’s iRhythm Holdings IRTC Stock Holding History

Simplex Trading’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 		$53.5K Buy
450
+268
+147% +$31.2K ﹤0.01% 6238
2026
Q1 		$21.5K Buy
+182
New +$26.3K ﹤0.01% 6719
2025
Q4 		– Sell
-362
Closed -$64.2K – 9277
2025
Q3 		$62K Buy
+362
New +$57.5K ﹤0.01% 6238
2025
Q1 		– Sell
-7,139
Closed -$756K – 9034
2024
Q4 		$643K Sell
7,139
-14,666
-67% -$1.15M ﹤0.01% 3284
2024
Q3 		$1.62M Buy
21,805
+20,022
+1,123% +$1.59M ﹤0.01% 2464
2024
Q2 		$191K Sell
1,783
-2,128
-54% -$217K ﹤0.01% 4699
2024
Q1 		$453K Buy
+3,911
New +$440K ﹤0.01% 3954
2022
Q3 		– Sell
-12,438
Closed -$1.8M – 10372
2022
Q2 		$1.34M Buy
+12,438
New +$1.65M ﹤0.01% 2293
2022
Q1 		– Sell
-9,446
Closed -$1.21M – 10876
2021
Q4 		$1.11M Sell
9,446
-12,864
-58% -$1.18M ﹤0.01% 2722
2021
Q3 		$1.42M Sell
22,310
-1,900
-8% -$101K ﹤0.01% 2603
2021
Q2 		$1.61M Buy
24,210
+23,808
+5,922% +$1.89M ﹤0.01% 2472
2021
Q1 		$55K Buy
+402
New +$72K ﹤0.01% 6488
2020
Q4 		– Sell
-1,096
Closed -$250K – 8681
2020
Q3 		$260K Buy
+1,096
New +$194K ﹤0.01% 3779
2019
Q4 		– Sell
-12,503
Closed -$848K – 7602
2019
Q3 		$926K Buy
12,503
+12,196
+3,973% +$945K ﹤0.01% 1998
2019
Q2 		$24K Sell
307
-13,761
-98% -$1M ﹤0.01% 5471
2019
Q1 		$1.05M Buy
+14,068
New +$1.2M ﹤0.01% 1956
2018
Q2 		– Sell
-357
Closed -$25K – 7608
2018
Q1 		$22K Buy
+357
New +$22.1K ﹤0.01% 3256

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

Simplex Trading's IRTC Position: Q2 2026 in Review

Simplex Trading increased its iRhythm Holdings (IRTC) stake by 147% in Q2 2026, buying an estimated $31.2K and bringing the position to 450 shares worth $53.5K. The position accounts for ﹤0.01% of the portfolio, ranked #6238.

Simplex Trading first reported a position in IRTC in Q1 2018 and has held it in 17 quarters since. The position peaked at $1.62M in Q3 2024. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Simplex Trading held 450 shares of iRhythm Holdings worth $53.5K as of Q2 2026.
  • Simplex Trading bought 268 iRhythm Holdings shares in Q2 2026, an estimated $31.2K.
  • iRhythm Holdings made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #6238 holding.
  • Simplex Trading first reported a position in iRhythm Holdings in Q1 2018 and has held it in 17 quarters since.
  • Simplex Trading's iRhythm Holdings position peaked at $1.62M in Q3 2024.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.