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 		$11.9K Sell
100
-100
-50% -$11.6K ﹤0.01% 7551
2026
Q1 		$23.6K Sell
200
-2,400
-92% -$346K ﹤0.01% 6635
2025
Q4 		$461K Buy
2,600
+1,300
+100% +$230K ﹤0.01% 3383
2025
Q3 		$223K Buy
1,300
+400
+44% +$63.6K ﹤0.01% 4808
2025
Q2 		$138K Sell
900
-300
-25% -$38.8K ﹤0.01% 4902
2025
Q1 		$125K Sell
1,200
-5,700
-83% -$604K ﹤0.01% 4828
2024
Q4 		$622K Sell
6,900
-3,100
-31% -$244K ﹤0.01% 3307
2024
Q3 		$742K Buy
10,000
+900
+10% +$71.7K ﹤0.01% 3202
2024
Q2 		$979K Sell
9,100
-2,400
-21% -$245K ﹤0.01% 2937
2024
Q1 		$1.33M Buy
11,500
+7,500
+188% +$843K ﹤0.01% 2817
2023
Q4 		$428K Buy
4,000
+600
+18% +$52.3K ﹤0.01% 3860
2023
Q3 		$320K Sell
3,400
-37,200
-92% -$3.78M ﹤0.01% 3869
2023
Q2 		$4.24M Buy
40,600
+38,500
+1,833% +$4.62M ﹤0.01% 1435
2023
Q1 		$260K Sell
2,100
-5,600
-73% -$607K ﹤0.01% 4004
2022
Q4 		$721K Buy
7,700
+5,500
+250% +$599K ﹤0.01% 2798
2022
Q3 		$275K Buy
2,200
+700
+47% +$101K ﹤0.01% 4194
2022
Q2 		$162K Sell
1,500
-900
-38% -$119K ﹤0.01% 4896
2022
Q1 		$377K Sell
2,400
-2,000
-45% -$257K ﹤0.01% 4235
2021
Q4 		$517K Sell
4,400
-16,000
-78% -$1.47M ﹤0.01% 3752
2021
Q3 		$1.3M Buy
20,400
+100
+0.5% +$5.3K ﹤0.01% 2722
2021
Q2 		$1.35M Buy
20,300
+20,286
+144,900% +$1.61M ﹤0.01% 2704
2021
Q1 		$194K Buy
14
+6
+75% +$1.07K ﹤0.01% 4787
2020
Q4 		$189K Sell
8
-20
-71% -$4.56K ﹤0.01% 4679
2020
Q3 		$666K Buy
28
+15
+115% +$2.65K ﹤0.01% 2697
2020
Q2 		$150K Buy
13
+5
+63% +$551 ﹤0.01% 4325
2020
Q1 		$65K Buy
8
+6
+300% +$498 ﹤0.01% 4856
2019
Q4 		$13K Sell
2
-38
-95% -$2.58K ﹤0.01% 6237
2019
Q3 		$296K Buy
40
+37
+1,233% +$2.87K ﹤0.01% 3179
2019
Q2 		$23K Sell
3
-277
-99% -$20.2K ﹤0.01% 5503
2019
Q1 		$2.1M Buy
+280
New +$23.9K 0.01% 1333

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.