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Boston Family Office’s Monolithic Power Systems MPWR Stock Holding History

Boston Family Office’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
2026
Q1 		$4.97M Sell
4,544
-109
-2% -$119K 0.33% 74
2025
Q4 		$4.22M Buy
4,653
+1,406
+43% +$1.35M 0.27% 82
2025
Q3 		$2.99M Buy
3,247
+733
+29% +$594K 0.19% 96
2025
Q2 		$1.84M Sell
2,514
-105
-4% -$66.9K 0.12% 128
2025
Q1 		$1.52M Buy
2,619
+5
+0.2% +$3.15K 0.11% 132
2024
Q4 		$1.55M Buy
2,614
+2,383
+1,032% +$1.73M 0.11% 129
2024
Q3 		$214K Buy
+231
New +$199K 0.01% 268

Other funds holding MPWR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Boston Family Office's MPWR Position: Q1 2026 in Review

Boston Family Office reduced its Monolithic Power Systems (MPWR) stake by 2.3% in Q1 2026, selling an estimated $119K and leaving 4,544 shares worth $4.97M. The position accounts for 0.33% of the portfolio, ranked #74.

Boston Family Office first reported a position in MPWR in Q3 2024 and has held it in 7 quarters since. 1,115 funds tracked by Wall St. Rank hold MPWR as of Q1 2026.

  • Boston Family Office held 4,544 shares of Monolithic Power Systems worth $4.97M as of Q1 2026.
  • Boston Family Office sold 109 Monolithic Power Systems shares in Q1 2026, an estimated $119K.
  • Monolithic Power Systems made up 0.33% of Boston Family Office's portfolio in Q1 2026, its #74 holding.
  • Boston Family Office first reported a position in Monolithic Power Systems in Q3 2024 and has held it in 7 quarters since.
  • 1,115 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q1 2026.

Based on Boston Family Office's 13F filing for Q1 2026, filed 13 May 2026.