UBS O'Connor’s iRhythm Holdings IRTC Stock Holding History

UBS O'Connor’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
2024 Q4	–	Sell	-25,000	Closed	-$71.9K	–	505
2024 Q3	$71.9K	Buy	+25,000	New	+$1.99M	﹤0.01%	416

Other funds holding IRTC

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

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

Sands Capital Management Arlington, Virginia $26.9B AUM 34.44% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William Blair & Company Chicago, Illinois $38.4B AUM 25.71% 1-Year Est. Return

EAM

Eventide Asset Management Boston, Massachusetts $7.48B AUM 104.76% 1-Year Est. Return

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

UBS O'Connor's IRTC Position: Q3 2025 in Review

UBS O'Connor sold out of iRhythm Holdings (IRTC) in Q3 2025, closing a stake of 7,993 shares — an estimated $1.23M sold.

UBS O'Connor first reported a position in IRTC in Q1 2023 and held it in 10 quarters. The position peaked at $2.2M in Q1 2024. 337 funds tracked by Wall St. Rank hold IRTC as of Q3 2025.

UBS O'Connor reported no remaining iRhythm Holdings position as of Q3 2025 after selling out during the quarter.
UBS O'Connor sold 7,993 iRhythm Holdings shares in Q3 2025, an estimated $1.23M.
UBS O'Connor first reported a position in iRhythm Holdings in Q1 2023 and held it in 10 quarters.
UBS O'Connor's iRhythm Holdings position peaked at $2.2M in Q1 2024.
337 funds tracked by Wall St. Rank held iRhythm Holdings as of Q3 2025.

Based on UBS O'Connor's 13F filing for Q3 2025, filed 14 Nov 2025.