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Fox Run Management’s Monolithic Power Systems MPWR Stock Holding History

Fox Run 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 		$275K Buy
+199
New +$299K 0.05% 707
2026
Q1 		– Sell
-458
Closed -$415K – 1114
2025
Q4 		$415K Buy
+458
New +$441K 0.06% 576
2025
Q2 		– Sell
-631
Closed -$366K – 1086
2025
Q1 		$366K Sell
631
-935
-60% -$589K 0.06% 611
2024
Q4 		$927K Buy
1,566
+876
+127% +$634K 0.17% 179
2024
Q3 		$638K Buy
+690
New +$596K 0.14% 255
2024
Q2 		– Sell
-1,580
Closed -$1.07M – 957
2024
Q1 		$1.07M Buy
+1,580
New +$1.05M 0.23% 110
2023
Q2 		– Sell
-1,269
Closed -$635K – 866
2023
Q1 		$635K Buy
+1,269
New +$583K 0.21% 160
2022
Q4 		– Sell
-650
Closed -$236K – 793
2022
Q3 		$236K Sell
650
-122
-16% -$54.3K 0.09% 434
2022
Q2 		$296K Buy
+772
New +$326K 0.15% 303
2020
Q1 		– Sell
-1,202
Closed -$214K – 278
2019
Q4 		$214K Sell
1,202
-648
-35% -$103K 0.17% 309
2019
Q3 		$288K Buy
+1,850
New +$277K 0.26% 167
2018
Q4 		– Sell
-2,997
Closed -$376K – 644
2018
Q3 		$376K Buy
+2,997
New +$418K 0.16% 276
2017
Q3 		– Sell
-4,400
Closed -$424K – 802
2017
Q2 		$424K Buy
+4,400
New +$419K 0.15% 282

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

Fox Run Management's MPWR Position: Q2 2026 in Review

Fox Run Management opened a new position in Monolithic Power Systems (MPWR) in Q2 2026: 199 shares worth $275K. The stake represents 0.05% of the portfolio and ranks #707 among its holdings. This is a return to the name: Fox Run Management previously reported a position in MPWR as recently as Q4 2025.

Fox Run Management first reported a position in MPWR in Q2 2017 and has held it in 13 quarters since. The position peaked at $1.07M in Q1 2024. 1,243 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Fox Run Management held 199 shares of Monolithic Power Systems worth $275K as of Q2 2026.
  • Monolithic Power Systems was a new Fox Run Management position in Q2 2026.
  • Monolithic Power Systems made up 0.05% of Fox Run Management's portfolio in Q2 2026, its #707 holding.
  • Fox Run Management first reported a position in Monolithic Power Systems in Q2 2017 and has held it in 13 quarters since.
  • Fox Run Management's Monolithic Power Systems position peaked at $1.07M in Q1 2024.
  • 1,243 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Fox Run Management's 13F filing for Q2 2026, filed 4 Aug 2026.