Boston Partners’s Monolithic Power Systems MPWR Stock Holding History

Boston Partners’s Portfolio MPWR Stock Details MPWR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-2,251	Closed	-$2.07M	–	791
2025 Q3	$2.07M	Sell	2,251 -2,408	-52%	-$1.95M	﹤0.01%	555
2025 Q2	$3.41M	Buy	+4,659	New	+$2.97M	﹤0.01%	485

Other funds holding MPWR

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Boston Partners's MPWR Position: Q4 2025 in Review

Boston Partners sold out of Monolithic Power Systems (MPWR) in Q4 2025, closing a stake of 2,251 shares — an estimated $2.07M sold.

Boston Partners first reported a position in MPWR in Q2 2025 and held it in 2 quarters. The position peaked at $3.41M in Q2 2025. 1,061 funds tracked by Wall St. Rank hold MPWR as of Q4 2025.

Boston Partners reported no remaining Monolithic Power Systems position as of Q4 2025 after selling out during the quarter.
Boston Partners sold 2,251 Monolithic Power Systems shares in Q4 2025, an estimated $2.07M.
Boston Partners first reported a position in Monolithic Power Systems in Q2 2025 and held it in 2 quarters.
Boston Partners's Monolithic Power Systems position peaked at $3.41M in Q2 2025.
1,061 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q4 2025.

Based on Boston Partners's 13F filing for Q4 2025, filed 13 Feb 2026.