Group One Trading
IRTC icon

Group One Trading’s iRhythm Holdings IRTC Stock Holding History

Group One 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
Q1 		$206K Buy
+1,749
New +$252K ﹤0.01% 4084
2025
Q3 		– Sell
-5,450
Closed -$866K – 8739
2025
Q2 		$839K Sell
5,450
-10,405
-66% -$1.34M ﹤0.01% 2927
2025
Q1 		$1.66M Sell
15,855
-4,515
-22% -$478K ﹤0.01% 1997
2024
Q4 		$1.84M Buy
+20,370
New +$1.6M ﹤0.01% 1996
2024
Q2 		– Sell
-2,969
Closed -$303K – 7090
2024
Q1 		$344K Buy
2,969
+732
+33% +$82.3K ﹤0.01% 3091
2023
Q4 		$239K Buy
+2,237
New +$195K ﹤0.01% 3708
2023
Q1 		– Sell
-38
Closed -$4.12K – 7551
2022
Q4 		$3.56K Buy
+38
New +$4.14K ﹤0.01% 6473
2022
Q3 		– Sell
-5,229
Closed -$755K – 7848
2022
Q2 		$565K Buy
+5,229
New +$693K ﹤0.01% 3296
2022
Q1 		– Sell
-41,892
Closed -$5.38M – 8334
2021
Q4 		$4.93M Buy
41,892
+32,349
+339% +$2.97M ﹤0.01% 1710
2021
Q3 		$559K Buy
9,543
+7,707
+420% +$408K ﹤0.01% 4060
2021
Q2 		$122K Sell
1,836
-9,965
-84% -$790K ﹤0.01% 5757
2021
Q1 		$1.64M Buy
+11,801
New +$2.11M ﹤0.01% 2686
2020
Q3 		– Sell
-6,071
Closed -$1.07M – 6306
2020
Q2 		$704K Buy
6,071
+2,538
+72% +$280K ﹤0.01% 2343
2020
Q1 		$287K Buy
3,533
+3,152
+827% +$261K ﹤0.01% 2465
2019
Q4 		$26K Buy
+381
New +$25.9K ﹤0.01% 4276
2019
Q1 		– Sell
-7
Closed -$598 – 5067
2018
Q4 		$0 Buy
+7
New +$531 ﹤0.01% 5117
2018
Q3 		– Sell
-2,237
Closed -$195K – 5384
2018
Q2 		$181K Buy
2,237
+2,000
+844% +$140K ﹤0.01% 3126
2018
Q1 		$15K Sell
237
-5,548
-96% -$343K ﹤0.01% 4181
2017
Q4 		$324K Buy
+5,785
New +$302K ﹤0.01% 2591

Other funds holding IRTC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Group One Trading's IRTC Position: Q1 2026 in Review

Group One Trading opened a new position in iRhythm Holdings (IRTC) in Q1 2026: 1,749 shares worth $206K. The stake represents ﹤0.01% of the portfolio and ranks #4084 among its holdings. This is a return to the name: Group One Trading previously reported a position in IRTC as recently as Q2 2025.

Group One Trading first reported a position in IRTC in Q4 2017 and has held it in 19 quarters since. The position peaked at $4.93M in Q4 2021. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • Group One Trading held 1,749 shares of iRhythm Holdings worth $206K as of Q1 2026.
  • iRhythm Holdings was a new Group One Trading position in Q1 2026.
  • iRhythm Holdings made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #4084 holding.
  • Group One Trading first reported a position in iRhythm Holdings in Q4 2017 and has held it in 19 quarters since.
  • Group One Trading's iRhythm Holdings position peaked at $4.93M in Q4 2021.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.