D.E. Shaw & Co
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D.E. Shaw & Co’s iRhythm Holdings IRTC Stock Holding History

D.E. Shaw & Co’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 		$1.19M Buy
+10,100
New +$1.46M ﹤0.01% 3313
2025
Q1 		– Sell
-10,300
Closed -$929K – 4479
2024
Q4 		$929K Buy
10,300
+6,600
+178% +$519K ﹤0.01% 3245
2024
Q3 		$275K Buy
+3,700
New +$295K ﹤0.01% 4018
2021
Q4 		– Sell
-35,500
Closed -$2.08M – 5540
2021
Q3 		$2.08M Buy
+35,500
New +$1.88M ﹤0.01% 3001
2018
Q1 		– Sell
-4,900
Closed -$275K – 3626
2017
Q4 		$275K Buy
+4,900
New +$256K ﹤0.01% 3276

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

D.E. Shaw & Co's IRTC Position: Q1 2026 in Review

D.E. Shaw & Co increased its iRhythm Holdings (IRTC) stake by 54% in Q1 2026, buying an estimated $27.9M and bringing the position to 554,266 shares worth $65.4M. The position accounts for 0.04% of the portfolio, ranked #549.

D.E. Shaw & Co first reported a position in IRTC in Q2 2017 and has held it in 31 quarters since. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • D.E. Shaw & Co held 554,266 shares of iRhythm Holdings worth $65.4M as of Q1 2026.
  • D.E. Shaw & Co bought 193,597 iRhythm Holdings shares in Q1 2026, an estimated $27.9M.
  • iRhythm Holdings made up 0.04% of D.E. Shaw & Co's portfolio in Q1 2026, its #549 holding.
  • D.E. Shaw & Co first reported a position in iRhythm Holdings in Q2 2017 and has held it in 31 quarters since.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on D.E. Shaw & Co's 13F filing for Q1 2026, filed 15 May 2026.