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Harbor Capital Advisors’s iRhythm Holdings IRTC Stock Holding History

Harbor Capital 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 		$2.04M Buy
17,164
+1,503
+10% +$175K 0.14% 213
2026
Q1 		$1.85M Buy
15,661
+7,055
+82% +$1.02M 0.15% 204
2025
Q4 		$1.53M Sell
8,606
-389
-4% -$68.9K 0.12% 240
2025
Q3 		$1.55M Sell
8,995
-19,341
-68% -$3.07M 0.12% 228
2025
Q2 		$4.36M Sell
28,336
-25,897
-48% -$3.35M 0.18% 184
2025
Q1 		$5.68M Sell
54,233
-30,714
-36% -$3.25M 0.26% 136
2024
Q4 		$7.66M Buy
84,947
+5,009
+6% +$394K 0.33% 88
2024
Q3 		$5.93M Buy
79,938
+58,448
+272% +$4.66M 0.26% 118
2024
Q2 		$2.31M Buy
21,490
+16,988
+377% +$1.74M 0.18% 165
2024
Q1 		$522K Buy
+4,502
New +$506K 0.07% 391

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

Harbor Capital Advisors's IRTC Position: Q2 2026 in Review

Harbor Capital Advisors increased its iRhythm Holdings (IRTC) stake by 9.6% in Q2 2026, buying an estimated $175K and bringing the position to 17,164 shares worth $2.04M. The position accounts for 0.14% of the portfolio, ranked #213.

Harbor Capital Advisors first reported a position in IRTC in Q1 2024 and has held it in 10 quarters since. The position peaked at $7.66M in Q4 2024. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Harbor Capital Advisors held 17,164 shares of iRhythm Holdings worth $2.04M as of Q2 2026.
  • Harbor Capital Advisors bought 1,503 iRhythm Holdings shares in Q2 2026, an estimated $175K.
  • iRhythm Holdings made up 0.14% of Harbor Capital Advisors's portfolio in Q2 2026, its #213 holding.
  • Harbor Capital Advisors first reported a position in iRhythm Holdings in Q1 2024 and has held it in 10 quarters since.
  • Harbor Capital Advisors's iRhythm Holdings position peaked at $7.66M in Q4 2024.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Harbor Capital Advisors's 13F filing for Q2 2026, filed 7 Aug 2026.