Castleark Management’s iRhythm Holdings IRTC Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$3.21M	Sell	27,193 -23,000	-46%	-$3.32M	0.11%	179
2025 Q4	$8.91M	Sell	50,193 -8,200	-14%	-$1.45M	0.26%	78
2025 Q3	$10M	Buy	58,393 +10,213	+21%	+$1.62M	0.28%	63
2025 Q2	$7.42M	Sell	48,180 -110	-0.2%	-$14.2K	0.22%	77
2025 Q1	$5.05M	Buy	+48,290	New	+$5.11M	0.18%	120
2022 Q4	–	Sell	-36,100	Closed	-$4.52M	–	303
2022 Q3	$4.52M	Sell	36,100 -3,710	-9%	-$536K	0.25%	100
2022 Q2	$4.3M	Sell	39,810 -11,380	-22%	-$1.51M	0.23%	109
2022 Q1	$8.06M	Buy	+51,190	New	+$6.57M	0.35%	66
2020 Q4	–	Sell	-25,493	Closed	-$6.07M	–	348
2020 Q3	$6.07M	Buy	+25,493	New	+$4.51M	0.24%	115