SEC 13F Intelligence

Rock Springs Capital Management LP / IRTC

Rock Springs Capital Management LP’s Irhythm Holdings Inc Position

Does Rock Springs Capital Management LP own Irhythm Holdings Inc (IRTC)? Yes — 261.8K shares worth $31M (+1.82% of its 13F portfolio) as of Q1 2026, up from 235.0K shares the prior filed quarter.

Position Value
$31M
Q1 2026
Shares
261.8K
% of Portfolio
+1.82%
Quarters Held
30
currently held

Position History IRTC

Reported value by quarter
Q4 ’18: $33MQ4 ’18Q1 ’19: $37MQ2 ’19: $40MQ3 ’19: $41MQ4 ’19: $42MQ4 ’19Q1 ’20: $52MQ2 ’20: $75MQ3 ’20: $149MQ4 ’20: $148MQ4 ’20Q1 ’21: $60MQ2 ’21: $30MQ3 ’21: $26MQ4 ’21: $51MQ4 ’21Q1 ’22: $69MQ2 ’22: $29MQ3 ’22: $37MQ4 ’22: $29MQ4 ’22Q1 ’23: $38MQ2 ’23: $32MQ3 ’23: $33MQ4 ’23: $38MQ4 ’23Q1 ’24: $46MQ2 ’24: $43MQ3 ’24: $30MQ4 ’24: $36MQ4 ’24Q1 ’25: $27MQ2 ’25: $37MQ3 ’25: $40MQ4 ’25: $42MQ4 ’25Q1 ’26: $31Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 2026261.8K$31M+1.82%
Q4 2025235.0K$42M+2.14%
Q3 2025235.0K$40M+2.36%
Q2 2025242.5K$37M+2.33%
Q1 2025254.3K$27M+1.52%
Q4 2024397.5K$36M+1.36%
Q3 2024397.5K$30M+0.96%
Q2 2024397.5K$43M+1.29%
Q1 2024392.3K$46M+1.16%
Q4 2023350.8K$38M+0.92%
Q3 2023350.8K$33M+0.89%
Q2 2023309.4K$32M+0.77%
Q1 2023309.4K$38M+0.92%
Q4 2022309.4K$29M+0.70%
Q3 2022293.3K$37M+0.95%
Q2 2022270.0K$29M+0.85%
Q1 2022436.0K$69M+1.73%
Q4 2021433.0K$51M+1.18%
Q3 2021448.0K$26M+0.55%
Q2 2021448.0K$30M+0.59%
Q1 2021432.5K$60M+1.31%
Q4 2020625.0K$148M+3.14%
Q3 2020625.0K$149M+3.78%
Q2 2020651.0K$75M+2.07%
Q1 2020645.0K$52M+2.17%
Q4 2019624.0K$42M+1.34%
Q3 2019555.0K$41M+1.64%
Q2 2019499.6K$40M+1.43%
Q1 2019499.6K$37M+1.44%
Q4 2018482.0K$33M+1.58%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Rock Springs Capital Management LP’s full portfolio or all institutional holders of IRTC.