Champlain Investment Partners’s iRhythm Holdings IRTC Stock Holding History

Champlain Investment Partners’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	$11.5M	Buy	+97,015	New	+$11.3M	0.3%	120
2025 Q4	–	Sell	-365,627	Closed	-$62.9M	–	138
2025 Q3	$62.9M	Sell	365,627 -295,605	-45%	-$47M	0.47%	91
2025 Q2	$102M	Sell	661,232 -161,559	-20%	-$20.9M	0.71%	56
2025 Q1	$86.1M	Buy	822,791 +96,529	+13%	+$10.2M	0.62%	70
2024 Q4	$65.5M	Buy	726,262 +59,161	+9%	+$4.65M	0.41%	96
2024 Q3	$49.5M	Sell	667,101 -72,164	-10%	-$5.75M	0.3%	106
2024 Q2	$79.6M	Buy	739,265 +163,465	+28%	+$16.7M	0.49%	87
2024 Q1	$66.8M	Buy	575,800 +293,710	+104%	+$33M	0.38%	95
2023 Q4	$30.2M	Buy	+282,090	New	+$24.6M	0.18%	122

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

Champlain Investment Partners's IRTC Position: Q2 2026 in Review

Champlain Investment Partners opened a new position in iRhythm Holdings (IRTC) in Q2 2026: 97,015 shares worth $11.5M. The stake represents 0.3% of the portfolio and ranks #120 among its holdings. This is a return to the name: Champlain Investment Partners previously reported a position in IRTC as recently as Q3 2025.

Champlain Investment Partners first reported a position in IRTC in Q4 2023 and has held it in 9 quarters since. The position peaked at $102M in Q2 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

Champlain Investment Partners held 97,015 shares of iRhythm Holdings worth $11.5M as of Q2 2026.
iRhythm Holdings was a new Champlain Investment Partners position in Q2 2026.
iRhythm Holdings made up 0.3% of Champlain Investment Partners's portfolio in Q2 2026, its #120 holding.
Champlain Investment Partners first reported a position in iRhythm Holdings in Q4 2023 and has held it in 9 quarters since.
Champlain Investment Partners's iRhythm Holdings position peaked at $102M in Q2 2025.
304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Champlain Investment Partners's 13F filing for Q2 2026, filed 12 Aug 2026.