SEC 13F Intelligence

Congress Asset Management Co / MPWR

Congress Asset Management Co’s Monolithic Pwr Sys Inc Position

Does Congress Asset Management Co own Monolithic Pwr Sys Inc (MPWR)? Yes — 80.4K shares worth $111M (+0.68% of its 13F portfolio) as of Q2 2026, down from 83.3K shares the prior filed quarter.

Position Value
$111M
Q2 2026
Shares
80.4K
% of Portfolio
+0.68%
Quarters Held
30
currently held

Position History MPWR

Reported value by quarter
Q4 ’18: $85MQ4 ’18Q1 ’19: $98MQ2 ’19: $95MQ3 ’19: $101MQ4 ’19: $113MQ4 ’19Q1 ’20: $102MQ2 ’20: $120MQ3 ’20: $138MQ4 ’20: $166MQ4 ’20Q1 ’21: $146MQ2 ’21: $145MQ3 ’21: $182MQ4 ’21: $172MQ4 ’21Q1 ’22: $167MQ2 ’22: $148MQ3 ’22: $115MQ4 ’22: $111MQ4 ’22Q1 ’23: $138MQ2 ’23: $146MQ3 ’23: $120MQ1 ’24: $170MQ1 ’24Q2 ’24: $200MQ3 ’24: $133MQ4 ’24: $77MQ1 ’25: $71MQ1 ’25Q2 ’25: $92MQ3 ’25: $100MQ4 ’25: $82MQ1 ’26: $91MQ1 ’26Q2 ’26: $111Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q2 202680.4K$111M+0.68%
Q1 202683.3K$91M+0.65%
Q4 202590.7K$82M+0.58%
Q3 2025108.3K$100M+0.66%
Q2 2025125.2K$92M+0.63%
Q1 2025122.7K$71M+0.53%
Q4 2024130.7K$77M+0.52%
Q3 2024144.2K$133M+0.91%
Q2 2024243.3K$200M+1.43%
Q1 2024251.2K$170M+1.21%
Q3 2023259.6K$120M+1.06%
Q2 2023269.9K$146M+1.27%
Q1 2023276.6K$138M+1.29%
Q4 2022312.9K$111M+1.11%
Q3 2022317.4K$115M+1.24%
Q2 2022384.5K$148M+1.41%
Q1 2022344.2K$167M+1.42%
Q4 2021349.1K$172M+1.31%
Q3 2021374.9K$182M+1.42%
Q2 2021387.2K$145M+1.21%
Q1 2021413.6K$146M+1.32%
Q4 2020452.0K$166M+1.56%
Q3 2020492.2K$138M+1.49%
Q2 2020508.2K$120M+1.43%
Q1 2020610.6K$102M+1.56%
Q4 2019634.6K$113M+1.38%
Q3 2019651.1K$101M+1.30%
Q2 2019696.6K$95M+1.20%
Q1 2019721.3K$98M+1.28%
Q4 2018734.5K$85M+1.28%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Congress Asset Management Co’s full portfolio or all institutional holders of MPWR.