Prosight Management’s iRhythm Holdings IRTC Stock Holding History

Prosight 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	$19.7M	Buy	165,500 +155,500	+1,555%	+$18.1M	3.39%	11
2026 Q1	$1.18M	Buy	+10,000	New	+$1.44M	0.19%	40
2023 Q4	–	Sell	-35,000	Closed	-$3.3M	–	43
2023 Q3	$3.3M	Sell	35,000 -1,030	-3%	-$105K	1.05%	26
2023 Q2	$3.76M	Buy	+36,030	New	+$4.33M	1.1%	27
2021 Q4	–	Sell	-37,396	Closed	-$2.19M	–	45
2021 Q3	$2.19M	Buy	37,396 +17,196	+85%	+$911K	1.2%	30
2021 Q2	$1.34M	Buy	+20,200	New	+$1.6M	0.84%	28

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

Prosight Management's IRTC Position: Q2 2026 in Review

Prosight Management increased its iRhythm Holdings (IRTC) stake by 1,555% in Q2 2026, buying an estimated $18.1M and bringing the position to 165,500 shares worth $19.7M. The position accounts for 3.39% of the portfolio, ranked #11.

Prosight Management first reported a position in IRTC in Q2 2021 and has held it in 6 quarters since. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

Prosight Management held 165,500 shares of iRhythm Holdings worth $19.7M as of Q2 2026.
Prosight Management bought 155,500 iRhythm Holdings shares in Q2 2026, an estimated $18.1M.
iRhythm Holdings made up 3.39% of Prosight Management's portfolio in Q2 2026, its #11 holding.
Prosight Management first reported a position in iRhythm Holdings in Q2 2021 and has held it in 6 quarters since.
304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

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