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Rossby Financial’s Monolithic Power Systems MPWR Stock Holding History

Rossby Financial’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 		$140K Buy
101
+37
+58% +$55.6K 0.03% 475
2026
Q1 		$71.6K Buy
64
+59
+1,180% +$64.5K 0.01% 637
2025
Q4 		$4.53K Buy
+5
New +$4.81K ﹤0.01% 1131

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

Rossby Financial's MPWR Position: Q2 2026 in Review

Rossby Financial increased its Monolithic Power Systems (MPWR) stake by 58% in Q2 2026, buying an estimated $55.6K and bringing the position to 101 shares worth $140K. The position accounts for 0.03% of the portfolio, ranked #475.

Rossby Financial first reported a position in MPWR in Q4 2025 and has held it in 3 quarters since. 1,243 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Rossby Financial held 101 shares of Monolithic Power Systems worth $140K as of Q2 2026.
  • Rossby Financial bought 37 Monolithic Power Systems shares in Q2 2026, an estimated $55.6K.
  • Monolithic Power Systems made up 0.03% of Rossby Financial's portfolio in Q2 2026, its #475 holding.
  • Rossby Financial first reported a position in Monolithic Power Systems in Q4 2025 and has held it in 3 quarters since.
  • 1,243 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Rossby Financial's 13F filing for Q2 2026, filed 4 Aug 2026.