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TimesSquare Capital Management’s iRhythm Holdings IRTC Stock Holding History

TimesSquare Capital Management’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 		$10.7M Buy
90,652
+30,830
+52% +$4.45M 0.18% 130
2025
Q4 		$10.6M Sell
59,822
-7,495
-11% -$1.33M 0.16% 139
2025
Q3 		$11.6M Sell
67,317
-4,343
-6% -$690K 0.17% 137
2025
Q2 		$11M Buy
+71,660
New +$9.26M 0.16% 137
2020
Q4 		– Sell
-259,807
Closed -$61.9M – 236
2020
Q3 		$61.9M Sell
259,807
-352,778
-58% -$62.4M 0.58% 64
2020
Q2 		$71M Sell
612,585
-73,605
-11% -$8.12M 0.68% 45
2020
Q1 		$55.8M Sell
686,190
-18,140
-3% -$1.5M 0.67% 49
2019
Q4 		$48M Buy
704,330
+6,005
+0.9% +$407K 0.43% 106
2019
Q3 		$51.8M Buy
698,325
+107,500
+18% +$8.33M 0.46% 94
2019
Q2 		$46.7M Buy
590,825
+193,300
+49% +$14.1M 0.36% 111
2019
Q1 		$29.8M Sell
397,525
-30,450
-7% -$2.6M 0.23% 152
2018
Q4 		$29.7M Buy
427,975
+4,900
+1% +$371K 0.26% 146
2018
Q3 		$40M Sell
423,075
-76,315
-15% -$6.65M 0.27% 146
2018
Q2 		$40.5M Sell
499,390
-181,730
-27% -$12.7M 0.27% 143
2018
Q1 		$42.9M Buy
681,120
+14,500
+2% +$898K 0.29% 137
2017
Q4 		$37.4M Sell
666,620
-130,000
-16% -$6.79M 0.25% 145
2017
Q3 		$41.3M Sell
796,620
-263,610
-25% -$11.9M 0.28% 133
2017
Q2 		$45M Buy
1,060,230
+322,300
+44% +$11.7M 0.29% 134
2017
Q1 		$27.7M Buy
+737,930
New +$25.4M 0.18% 195

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

TimesSquare Capital Management's IRTC Position: Q1 2026 in Review

TimesSquare Capital Management increased its iRhythm Holdings (IRTC) stake by 52% in Q1 2026, buying an estimated $4.45M and bringing the position to 90,652 shares worth $10.7M. The position accounts for 0.18% of the portfolio, ranked #130.

TimesSquare Capital Management first reported a position in IRTC in Q1 2017 and has held it in 19 quarters since. The position peaked at $71M in Q2 2020. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • TimesSquare Capital Management held 90,652 shares of iRhythm Holdings worth $10.7M as of Q1 2026.
  • TimesSquare Capital Management bought 30,830 iRhythm Holdings shares in Q1 2026, an estimated $4.45M.
  • iRhythm Holdings made up 0.18% of TimesSquare Capital Management's portfolio in Q1 2026, its #130 holding.
  • TimesSquare Capital Management first reported a position in iRhythm Holdings in Q1 2017 and has held it in 19 quarters since.
  • TimesSquare Capital Management's iRhythm Holdings position peaked at $71M in Q2 2020.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on TimesSquare Capital Management's 13F filing for Q1 2026, filed 7 May 2026.