Hudson Bay Capital Management
MPWR icon

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
2025
Q2 		– Sell
-2,500
Closed -$1.45M – 1562
2025
Q1 		$1.45M Buy
+2,500
New +$1.58M ﹤0.01% 869
2017
Q2 		– Sell
-50,000
Closed -$4.61M – 692
2017
Q1 		$4.61M Buy
+50,000
New +$4.43M 0.06% 284

Other funds holding MPWR

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $935B AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Hudson Bay Capital Management's MPWR Position: Q4 2025 in Review

Hudson Bay Capital Management sold out of Monolithic Power Systems (MPWR) in Q4 2025, closing a stake of 3,338 shares — an estimated $3.07M sold.

Hudson Bay Capital Management first reported a position in MPWR in Q1 2017 and held it in 3 quarters. The position peaked at $3.07M in Q3 2025. 1,061 funds tracked by Wall St. Rank hold MPWR as of Q4 2025.

  • Hudson Bay Capital Management reported no remaining Monolithic Power Systems position as of Q4 2025 after selling out during the quarter.
  • Hudson Bay Capital Management sold 3,338 Monolithic Power Systems shares in Q4 2025, an estimated $3.07M.
  • Hudson Bay Capital Management first reported a position in Monolithic Power Systems in Q1 2017 and held it in 3 quarters.
  • Hudson Bay Capital Management's Monolithic Power Systems position peaked at $3.07M in Q3 2025.
  • 1,061 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q4 2025.

Based on Hudson Bay Capital Management's 13F filing for Q4 2025, filed 13 Feb 2026.