SEC 13F Intelligence

Rock Springs Capital Management LP / PEN

Rock Springs Capital Management LP’s Penumbra Inc Position

Does Rock Springs Capital Management LP own Penumbra Inc (PEN)? Yes — 120.5K shares worth $40M (+2.33% of its 13F portfolio) as of Q1 2026.

Position Value
$40M
Q1 2026
Shares
120.5K
% of Portfolio
+2.33%
Quarters Held
30
currently held

Position History PEN

Reported value by quarter
Q4 ’18: $27MQ4 ’18Q1 ’19: $33MQ2 ’19: $38MQ3 ’19: $33MQ4 ’19: $40MQ4 ’19Q1 ’20: $36MQ2 ’20: $37MQ3 ’20: $31MQ4 ’20: $28MQ4 ’20Q1 ’21: $40MQ2 ’21: $40MQ3 ’21: $39MQ4 ’21: $43MQ4 ’21Q1 ’22: $45MQ2 ’22: $50MQ3 ’22: $90MQ4 ’22: $113MQ4 ’22Q1 ’23: $121MQ2 ’23: $126MQ3 ’23: $122MQ4 ’23: $135MQ4 ’23Q1 ’24: $113MQ2 ’24: $48MQ3 ’24: $51MQ4 ’24: $57MQ4 ’24Q1 ’25: $46MQ2 ’25: $33MQ3 ’25: $31MQ4 ’25: $37MQ4 ’25Q1 ’26: $40Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 2026120.5K$40M+2.33%
Q4 2025120.5K$37M+1.92%
Q3 2025120.5K$31M+1.78%
Q2 2025128.5K$33M+2.05%
Q1 2025171.0K$46M+2.62%
Q4 2024240.0K$57M+2.17%
Q3 2024265.0K$51M+1.68%
Q2 2024265.0K$48M+1.44%
Q1 2024505.0K$113M+2.86%
Q4 2023537.5K$135M+3.33%
Q3 2023503.8K$122M+3.26%
Q2 2023366.0K$126M+3.00%
Q1 2023433.5K$121M+2.88%
Q4 2022508.3K$113M+2.72%
Q3 2022476.0K$90M+2.33%
Q2 2022401.5K$50M+1.46%
Q1 2022204.5K$45M+1.14%
Q4 2021148.5K$43M+0.99%
Q3 2021147.5K$39M+0.83%
Q2 2021147.5K$40M+0.80%
Q1 2021147.5K$40M+0.87%
Q4 2020159.0K$28M+0.59%
Q3 2020159.0K$31M+0.78%
Q2 2020207.0K$37M+1.02%
Q1 2020225.0K$36M+1.50%
Q4 2019242.5K$40M+1.26%
Q3 2019242.5K$33M+1.30%
Q2 2019239.0K$38M+1.38%
Q1 2019225.0K$33M+1.28%
Q4 2018225.0K$27M+1.30%

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 PEN.