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Roman Butler Fullerton & Co’s Monolithic Power Systems MPWR Stock Holding History

Roman Butler Fullerton & Co’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
Q2 		$201K Buy
156
+1
+0.6% +$1.5K 0.05% 279
2026
Q1 		$203K Buy
+155
New +$169K 0.06% 267
2025
Q1 		– Sell
-455
Closed -$273K – 240
2024
Q4 		$273K Buy
+455
New +$329K 0.09% 192
2019
Q4 		– Sell
-2,860
Closed -$445K – 170
2019
Q3 		$445K Buy
+2,860
New +$428K 0.31% 102

Other funds holding MPWR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Roman Butler Fullerton & Co's MPWR Position: Q2 2026 in Review

Roman Butler Fullerton & Co increased its Monolithic Power Systems (MPWR) stake by 0.65% in Q2 2026, buying an estimated $1.5K and bringing the position to 156 shares worth $201K. The position accounts for 0.05% of the portfolio, ranked #279.

Roman Butler Fullerton & Co first reported a position in MPWR in Q3 2019 and has held it in 4 quarters since. The position peaked at $445K in Q3 2019. 1,245 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Roman Butler Fullerton & Co held 156 shares of Monolithic Power Systems worth $201K as of Q2 2026.
  • Roman Butler Fullerton & Co bought 1 Monolithic Power Systems share in Q2 2026, an estimated $1.5K.
  • Monolithic Power Systems made up 0.05% of Roman Butler Fullerton & Co's portfolio in Q2 2026, its #279 holding.
  • Roman Butler Fullerton & Co first reported a position in Monolithic Power Systems in Q3 2019 and has held it in 4 quarters since.
  • Roman Butler Fullerton & Co's Monolithic Power Systems position peaked at $445K in Q3 2019.
  • 1,245 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Roman Butler Fullerton & Co's 13F filing for Q2 2026, filed 6 Aug 2026.