Assenagon Asset Management
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Assenagon Asset Management’s iRhythm Holdings IRTC Stock Holding History

Assenagon Asset 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
Q2 		$2.64M Sell
22,161
-248,060
-92% -$28.8M ﹤0.01% 799
2026
Q1 		$31.9M Buy
270,221
+45,016
+20% +$6.5M 0.05% 268
2025
Q4 		$40M Buy
225,205
+147,329
+189% +$26.1M 0.06% 251
2025
Q3 		$13.4M Buy
+77,876
New +$12.4M 0.02% 426
2024
Q3 		– Sell
-48,962
Closed -$5.27M – 1412
2024
Q2 		$5.27M Buy
48,962
+38,344
+361% +$3.92M 0.01% 620
2024
Q1 		$1.23M Buy
10,618
+919
+9% +$103K ﹤0.01% 1004
2023
Q4 		$1.04M Buy
9,699
+11
+0.1% +$959 ﹤0.01% 1087
2023
Q3 		$913K Buy
+9,688
New +$985K ﹤0.01% 1059
2023
Q2 		– Sell
-5,321
Closed -$660K – 1391
2023
Q1 		$660K Buy
+5,321
New +$577K ﹤0.01% 1160
2022
Q3 		– Sell
-30,296
Closed -$3.27M – 1439
2022
Q2 		$3.27M Sell
30,296
-65,742
-68% -$8.71M 0.01% 676
2022
Q1 		$15.1M Buy
+96,038
New +$12.3M 0.04% 281
2021
Q4 		– Sell
-350,521
Closed -$20.5M – 1488
2021
Q3 		$20.5M Sell
350,521
-160,394
-31% -$8.5M 0.07% 205
2021
Q2 		$33.9M Buy
510,915
+508,626
+22,220% +$40.3M 0.12% 160
2021
Q1 		$318K Buy
+2,289
New +$410K ﹤0.01% 1093

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

Assenagon Asset Management's IRTC Position: Q2 2026 in Review

Assenagon Asset Management reduced its iRhythm Holdings (IRTC) stake by 92% in Q2 2026, selling an estimated $28.8M and leaving 22,161 shares worth $2.64M. The position accounts for ﹤0.01% of the portfolio, ranked #799.

Assenagon Asset Management first reported a position in IRTC in Q1 2021 and has held it in 14 quarters since. The position peaked at $40M in Q4 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Assenagon Asset Management held 22,161 shares of iRhythm Holdings worth $2.64M as of Q2 2026.
  • Assenagon Asset Management sold 248,060 iRhythm Holdings shares in Q2 2026, an estimated $28.8M.
  • iRhythm Holdings made up ﹤0.01% of Assenagon Asset Management's portfolio in Q2 2026, its #799 holding.
  • Assenagon Asset Management first reported a position in iRhythm Holdings in Q1 2021 and has held it in 14 quarters since.
  • Assenagon Asset Management's iRhythm Holdings position peaked at $40M in Q4 2025.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Assenagon Asset Management's 13F filing for Q2 2026, filed 8 Jul 2026.