Capstone Investment Advisors
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Capstone Investment Advisors’s iRhythm Holdings IRTC Stock Holding History

Capstone Investment Advisors’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 		$304K Buy
2,559
+24
+0.9% +$2.79K ﹤0.01% 1449
2026
Q1 		$299K Buy
+2,535
New +$366K ﹤0.01% 1363
2024
Q3 		– Sell
-2,253
Closed -$243K – 2060
2024
Q2 		$243K Sell
2,253
-7,036
-76% -$719K ﹤0.01% 1692
2024
Q1 		$1.08M Buy
+9,289
New +$1.04M ﹤0.01% 1103
2023
Q4 		– Sell
-3,096
Closed -$292K – 2246
2023
Q3 		$292K Buy
+3,096
New +$315K ﹤0.01% 1620

Other funds holding IRTC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RTW Investments
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
Eventide Asset Management
Eventide Asset Management Boston, Massachusetts $7.48B AUM 104.76% 1-Year Est. Return

Capstone Investment Advisors's IRTC Position: Q2 2026 in Review

Capstone Investment Advisors increased its iRhythm Holdings (IRTC) stake by 0.95% in Q2 2026, buying an estimated $2.79K and bringing the position to 2,559 shares worth $304K. The position accounts for ﹤0.01% of the portfolio, ranked #1449.

Capstone Investment Advisors first reported a position in IRTC in Q3 2023 and has held it in 5 quarters since. The position peaked at $1.08M in Q1 2024. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Capstone Investment Advisors held 2,559 shares of iRhythm Holdings worth $304K as of Q2 2026.
  • Capstone Investment Advisors bought 24 iRhythm Holdings shares in Q2 2026, an estimated $2.79K.
  • iRhythm Holdings made up ﹤0.01% of Capstone Investment Advisors's portfolio in Q2 2026, its #1449 holding.
  • Capstone Investment Advisors first reported a position in iRhythm Holdings in Q3 2023 and has held it in 5 quarters since.
  • Capstone Investment Advisors's iRhythm Holdings position peaked at $1.08M in Q1 2024.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Capstone Investment Advisors's 13F filing for Q2 2026, filed 17 Aug 2026.