Frontier Capital Management’s iRhythm Holdings IRTC Stock Holding History

Frontier Capital 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	$15.8M	Buy	132,475 +64,021	+94%	+$7.44M	0.15%	213
2026 Q1	$8.08M	Sell	68,454 -2,594	-4%	-$374K	0.08%	252
2025 Q4	$12.6M	Sell	71,048 -18,182	-20%	-$3.22M	0.13%	218
2025 Q3	$15.3M	Sell	89,230 -17,185	-16%	-$2.73M	0.14%	212
2025 Q2	$16.4M	Sell	106,415 -118,495	-53%	-$15.3M	0.15%	204
2025 Q1	$23.5M	Sell	224,910 -130,237	-37%	-$13.8M	0.26%	146
2024 Q4	$32M	Buy	355,147 +278,743	+365%	+$21.9M	0.3%	128
2024 Q3	$5.67M	Buy	+76,404	New	+$6.09M	0.05%	244
2018 Q3	–	Sell	-12,770	Closed	-$1.04M	–	294
2018 Q2	$1.04M	Buy	+12,770	New	+$893K	0.01%	296

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

Frontier Capital Management's IRTC Position: Q2 2026 in Review

Frontier Capital Management increased its iRhythm Holdings (IRTC) stake by 94% in Q2 2026, buying an estimated $7.44M and bringing the position to 132,475 shares worth $15.8M. The position accounts for 0.15% of the portfolio, ranked #213.

Frontier Capital Management first reported a position in IRTC in Q2 2018 and has held it in 9 quarters since. The position peaked at $32M in Q4 2024. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

Frontier Capital Management held 132,475 shares of iRhythm Holdings worth $15.8M as of Q2 2026.
Frontier Capital Management bought 64,021 iRhythm Holdings shares in Q2 2026, an estimated $7.44M.
iRhythm Holdings made up 0.15% of Frontier Capital Management's portfolio in Q2 2026, its #213 holding.
Frontier Capital Management first reported a position in iRhythm Holdings in Q2 2018 and has held it in 9 quarters since.
Frontier Capital Management's iRhythm Holdings position peaked at $32M in Q4 2024.
304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Frontier Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.