Hudson Bay Capital Management
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Hudson Bay Capital Management’s Monolithic Power Systems MPWR Stock Holding History

Hudson Bay Capital 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
Q2 		$2.74M Buy
+1,980
New +$2.97M 0.01% 734
2025
Q4 		– Sell
-3,338
Closed -$3.07M – 1419
2025
Q3 		$3.07M Buy
+3,338
New +$2.71M 0.01% 670
2025
Q2 		– Sell
-1,321
Closed -$766K – 1561
2025
Q1 		$766K Buy
+1,321
New +$832K ﹤0.01% 970
2017
Q2 		– Sell
-10,248
Closed -$944K – 691
2017
Q1 		$944K Buy
+10,248
New +$908K 0.01% 626

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 $3.38T AUM 44.17% 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

Hudson Bay Capital Management's MPWR Position: Q2 2026 in Review

Hudson Bay Capital Management opened a new position in Monolithic Power Systems (MPWR) in Q2 2026: 1,980 shares worth $2.74M. The stake represents 0.01% of the portfolio and ranks #734 among its holdings. This is a return to the name: Hudson Bay Capital Management previously reported a position in MPWR as recently as Q3 2025.

Hudson Bay Capital Management first reported a position in MPWR in Q1 2017 and has held it in 4 quarters since. The position peaked at $3.07M in Q3 2025. 1,246 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Hudson Bay Capital Management held 1,980 shares of Monolithic Power Systems worth $2.74M as of Q2 2026.
  • Monolithic Power Systems was a new Hudson Bay Capital Management position in Q2 2026.
  • Monolithic Power Systems made up 0.01% of Hudson Bay Capital Management's portfolio in Q2 2026, its #734 holding.
  • Hudson Bay Capital Management first reported a position in Monolithic Power Systems in Q1 2017 and has held it in 4 quarters since.
  • Hudson Bay Capital Management's Monolithic Power Systems position peaked at $3.07M in Q3 2025.
  • 1,246 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Hudson Bay Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.