Two Sigma Investments
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Two Sigma Investments’s iRhythm Holdings IRTC Stock Holding History

Two Sigma Investments’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 		– Sell
-52,600
Closed -$6.21M – 5238
2026
Q1 		$6.21M Buy
+52,600
New +$7.59M 0.01% 1790
2025
Q4 		– Sell
-2,100
Closed -$361K – 4232
2025
Q3 		$361K Buy
2,100
+200
+11% +$31.8K ﹤0.01% 3133
2025
Q2 		$293K Buy
+1,900
New +$246K ﹤0.01% 2799
2024
Q2 		– Sell
-19,900
Closed -$2.31M – 3177
2024
Q1 		$2.31M Buy
+19,900
New +$2.24M 0.01% 1380
2023
Q4 		– Sell
-3,863
Closed -$364K – 3253
2023
Q3 		$364K Buy
+3,863
New +$393K ﹤0.01% 2417
2021
Q4 		– Sell
-66,505
Closed -$3.9M – 4557
2021
Q3 		$3.9M Sell
66,505
-417,212
-86% -$22.1M 0.01% 1422
2021
Q2 		$32.1M Buy
483,717
+453,224
+1,486% +$35.9M 0.07% 326
2021
Q1 		$4.23M Buy
+30,493
New +$5.46M 0.01% 1163
2020
Q4 		– Sell
-4,289
Closed -$1.02M – 3536
2020
Q3 		$1.02M Buy
+4,289
New +$759K ﹤0.01% 1743
2018
Q4 		– Sell
-5,300
Closed -$502K – 3234
2018
Q3 		$502K Sell
5,300
-112,112
-95% -$9.76M ﹤0.01% 2442
2018
Q2 		$9.53M Buy
117,412
+82,110
+233% +$5.74M 0.03% 688
2018
Q1 		$2.22M Buy
35,302
+20,589
+140% +$1.27M 0.01% 1447
2017
Q4 		$825K Buy
14,713
+9,191
+166% +$480K ﹤0.01% 2094
2017
Q3 		$286K Buy
+5,522
New +$250K ﹤0.01% 2444

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

Two Sigma Investments's IRTC Position: Q2 2026 in Review

Two Sigma Investments sold out of iRhythm Holdings (IRTC) in Q2 2026, closing a stake of 52,600 shares — an estimated $6.21M sold.

Two Sigma Investments first reported a position in IRTC in Q3 2017 and held it in 14 quarters. The position peaked at $32.1M in Q2 2021. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Two Sigma Investments reported no remaining iRhythm Holdings position as of Q2 2026 after selling out during the quarter.
  • Two Sigma Investments sold 52,600 iRhythm Holdings shares in Q2 2026, an estimated $6.21M.
  • Two Sigma Investments first reported a position in iRhythm Holdings in Q3 2017 and held it in 14 quarters.
  • Two Sigma Investments's iRhythm Holdings position peaked at $32.1M in Q2 2021.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.