Vanguard Portfolio Management
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Vanguard Portfolio Management’s Monolithic Power Systems MPWR Stock Holding History

Vanguard Portfolio Management’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
Q3 		$3.43B Buy
2,547,660
+42,802
+2% +$56.1M 0.16% 108
2026
Q2 		$3.46B Sell
2,504,858
-11,634
-0.5% -$17.5M 0.16% 104
2026
Q1 		$2.75B Buy
+2,516,492
New +$2.75B 0.14% 129

Other funds holding MPWR

BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Invesco
Invesco Atlanta, Georgia $1.27T AUM 50.62% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $165B AUM 72.14% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $474B AUM 32.39% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return

Vanguard Portfolio Management's MPWR Position: Q3 2026 in Review

Vanguard Portfolio Management increased its Monolithic Power Systems (MPWR) stake by 1.7% in Q3 2026, buying an estimated $56.1M and bringing the position to 2,547,660 shares worth $3.43B. The position accounts for 0.16% of the portfolio, ranked #108.

Vanguard Portfolio Management first reported a position in MPWR in Q1 2026 and has held it in 3 quarters since. The position peaked at $3.46B in Q2 2026. 1,045 funds tracked by Wall St. Rank hold MPWR as of Q3 2026.

  • Vanguard Portfolio Management held 2,547,660 shares of Monolithic Power Systems worth $3.43B as of Q3 2026.
  • Vanguard Portfolio Management bought 42,802 Monolithic Power Systems shares in Q3 2026, an estimated $56.1M.
  • Monolithic Power Systems made up 0.16% of Vanguard Portfolio Management's portfolio in Q3 2026, its #108 holding.
  • Vanguard Portfolio Management first reported a position in Monolithic Power Systems in Q1 2026 and has held it in 3 quarters since.
  • Vanguard Portfolio Management's Monolithic Power Systems position peaked at $3.46B in Q2 2026.
  • 1,045 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q3 2026.

Based on Vanguard Portfolio Management's 13F filing for Q3 2026, filed 13 Nov 2026.