Harbour Investments’s iRhythm Holdings IRTC Stock Holding History

Harbour Investments’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	$2.09K	Buy	18 +3	+20%	+$349	﹤0.01%	4008
2026 Q1	$1.84K	Buy	15 +5	+50%	+$722	﹤0.01%	3931
2025 Q4	$1.77K	Hold	10	–	–	﹤0.01%	3332
2025 Q3	$1.72K	Hold	10	–	–	﹤0.01%	3313
2025 Q2	$1.54K	Hold	10	–	–	﹤0.01%	3202
2025 Q1	$1.05K	Hold	10	–	–	﹤0.01%	3229
2024 Q4	$902	Hold	10	–	–	﹤0.01%	3189
2024 Q3	$742	Hold	10	–	–	﹤0.01%	3143
2024 Q2	$1.08K	Hold	10	–	–	﹤0.01%	2979
2024 Q1	$1.16K	Hold	10	–	–	﹤0.01%	2897
2023 Q4	$1.07K	Hold	10	–	–	﹤0.01%	2810
2023 Q3	$943	Hold	10	–	–	﹤0.01%	2714
2023 Q2	$1.04K	Hold	10	–	–	﹤0.01%	2691
2023 Q1	$1.24K	Hold	10	–	–	﹤0.01%	2651
2022 Q4	$937	Sell	10 -11	-52%	-$1.2K	﹤0.01%	2696
2022 Q3	$2K	Hold	21	–	–	﹤0.01%	2451
2022 Q2	$2K	Buy	+21	New	+$2.78K	﹤0.01%	2451
2021 Q4	$2K	Sell	21 -100	-83%	-$9.17K	﹤0.01%	2405
2021 Q3	$7K	Buy	+121	New	+$6.41K	﹤0.01%	2835

Other funds holding IRTC

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return

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

Harbour Investments's IRTC Position: Q2 2026 in Review

Harbour Investments increased its iRhythm Holdings (IRTC) stake by 20% in Q2 2026, buying an estimated $349 and bringing the position to 18 shares worth $2.09K. The position accounts for ﹤0.01% of the portfolio, ranked #4008.

Harbour Investments first reported a position in IRTC in Q3 2021 and has held it in 19 quarters since. The position peaked at $7K in Q3 2021. 303 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

Harbour Investments held 18 shares of iRhythm Holdings worth $2.09K as of Q2 2026.
Harbour Investments bought 3 iRhythm Holdings shares in Q2 2026, an estimated $349.
iRhythm Holdings made up ﹤0.01% of Harbour Investments's portfolio in Q2 2026, its #4008 holding.
Harbour Investments first reported a position in iRhythm Holdings in Q3 2021 and has held it in 19 quarters since.
Harbour Investments's iRhythm Holdings position peaked at $7K in Q3 2021.
303 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Harbour Investments's 13F filing for Q2 2026, filed 12 Aug 2026.