MPWR — MONOLITHIC PWR SYS INC COM

Ownership history in Boston Partners  ·  4 quarters on record

This page tracks every 13F SEC filing in which Boston Partners reported a position in MONOLITHIC PWR SYS INC COM (MPWR). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
0.02% (2011 Q4)
Avg. % of fund
0.01%
First filed
2011 Q3
Last filed
2025 Q3
Quarters held
4
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q3 REDUCED 2,251 -2,408 -51.7% 0.00% $2.1M $919.09
2025 Q2 REDUCED 4,659 -197,476 -97.7% 0.00% $3.4M $728.86
2011 Q4 REDUCED 202,135 -17,680 -8.0% 0.02% $3.0M $12.90
2011 Q3 INITIATED 219,815 — — 0.01% $2.2M $8.72
% of Fund (quarterly)    MPWR price (monthly, adj. close)

Other funds also holding MPWR

As of 2025 Q4 — sorted by position size

Grandeur Peak Global Advisors, LLC 3Y 7Y 8.84% Pembroke Management, LTD 3Y 7Y 4.98% Avalon Global Asset Management LLC 3Y 7Y 3.3% Analog Century Management LP 3Y 3.15% ARCADIA INVESTMENT MANAGEMENT CORP/MI 3Y 7Y 2.97% FNY Investment Advisers, LLC 3Y 7Y 2.69% CARDEROCK CAPITAL MANAGEMENT INC 3Y 7Y 2.52% Meridiem Capital Partners LP 2.34% VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. 3Y 7Y 2.28% OSTRUM ASSET MANAGEMENT 3Y 7Y 2.04%
← Back to Boston Partners Holdings