Rock Springs Capital Management’s iRhythm Holdings IRTC Stock Holding History

Rock Springs 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 Q1	$30.9M	Buy	261,750 +26,750	+11%	+$3.86M	1.82%	17
2025 Q4	$41.7M	Hold	235,000	–	–	2.14%	14
2025 Q3	$40.4M	Sell	235,000 -7,500	-3%	-$1.19M	2.36%	11
2025 Q2	$37.3M	Sell	242,500 -11,800	-5%	-$1.52M	2.33%	13
2025 Q1	$26.6M	Sell	254,300 -143,200	-36%	-$15.2M	1.52%	26
2024 Q4	$35.8M	Hold	397,500	–	–	1.36%	26
2024 Q3	$29.5M	Hold	397,500	–	–	0.96%	40
2024 Q2	$42.8M	Buy	397,500 +5,250	+1%	+$536K	1.29%	31
2024 Q1	$45.5M	Buy	392,250 +41,500	+12%	+$4.67M	1.16%	32
2023 Q4	$37.5M	Hold	350,750	–	–	0.93%	38
2023 Q3	$33.1M	Buy	350,750 +41,300	+13%	+$4.2M	0.89%	35
2023 Q2	$32.3M	Hold	309,450	–	–	0.77%	44
2023 Q1	$38.4M	Hold	309,450	–	–	0.92%	40
2022 Q4	$29M	Buy	309,450 +16,200	+6%	+$1.76M	0.7%	47
2022 Q3	$36.7M	Buy	293,250 +23,250	+9%	+$3.36M	0.95%	40
2022 Q2	$29.2M	Sell	270,000 -166,000	-38%	-$22M	0.85%	40
2022 Q1	$68.7M	Buy	436,000 +3,000	+0.7%	+$385K	1.73%	18
2021 Q4	$51M	Sell	433,000 -15,000	-3%	-$1.38M	1.18%	30
2021 Q3	$26.2M	Hold	448,000	–	–	0.55%	59
2021 Q2	$29.7M	Buy	448,000 +15,504	+4%	+$1.23M	0.59%	55
2021 Q1	$60.1M	Sell	432,496 -192,504	-31%	-$34.5M	1.31%	24
2020 Q4	$148M	Hold	625,000	–	–	3.16%	2
2020 Q3	$149M	Sell	625,000 -26,000	-4%	-$4.6M	3.78%	1
2020 Q2	$75.4M	Buy	651,000 +6,000	+0.9%	+$662K	2.07%	4
2020 Q1	$52.5M	Buy	645,000 +21,000	+3%	+$1.74M	2.17%	5
2019 Q4	$42.5M	Buy	624,000 +69,000	+12%	+$4.68M	1.34%	19
2019 Q3	$41.1M	Buy	555,000 +55,385	+11%	+$4.29M	1.64%	12
2019 Q2	$39.5M	Hold	499,615	–	–	1.44%	17
2019 Q1	$37.5M	Buy	499,615 +17,615	+4%	+$1.51M	1.46%	14
2018 Q4	$33.5M	Buy	482,000 +2,000	+0.4%	+$152K	1.58%	16
2018 Q3	$45.4M	Hold	480,000	–	–	1.65%	13
2018 Q2	$38.9M	Buy	480,000 +2,500	+0.5%	+$175K	1.5%	16
2018 Q1	$30.1M	Buy	477,500 +71,500	+18%	+$4.43M	1.29%	21
2017 Q4	$22.8M	Buy	406,000 +20,000	+5%	+$1.05M	1.03%	29
2017 Q3	$20M	Buy	+386,000	New	+$17.5M	0.92%	37