Carderock Capital Management
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Carderock Capital Management’s Monolithic Power Systems MPWR Stock Holding History

Carderock 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
Q3 		$12.2M Sell
9,054
-1,247
-12% -$1.63M 2.8% 11
2026
Q2 		$14.2M Sell
10,301
-1,364
-12% -$2.05M 3.12% 7
2026
Q1 		$12.8M Buy
11,665
+196
+2% +$214K 3.15% 5
2025
Q4 		$10.4M Buy
11,469
+2,946
+35% +$2.84M 2.52% 12
2025
Q3 		$7.85M Buy
8,523
+2,856
+50% +$2.32M 1.91% 25
2025
Q2 		$4.14M Sell
5,667
-692
-11% -$441K 1.06% 44
2025
Q1 		$3.69M Buy
6,359
+1,509
+31% +$951K 0.98% 46
2024
Q4 		$2.87M Sell
4,850
-5,172
-52% -$3.75M 0.72% 47
2024
Q3 		$9.27M Buy
10,022
+453
+5% +$391K 2.19% 18
2024
Q2 		$7.86M Buy
9,569
+5,602
+141% +$4.04M 2.06% 20
2024
Q1 		$2.69M Buy
+3,967
New +$2.65M 0.75% 48

Other funds holding MPWR

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Barclays
Barclays London, United Kingdom $500B AUM 36.84% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $765B AUM 28.39% 1-Year Est. Return
VOYA Investment Management
VOYA Investment Management Atlanta, Georgia $109B AUM 51.53% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return
Amundi
Amundi Paris, France $496B AUM 35.36% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $144B AUM 22.91% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $362B AUM 34.89% 1-Year Est. Return
Citigroup
Citigroup New York $308B AUM 40.94% 1-Year Est. Return

Carderock Capital Management's MPWR Position: Q3 2026 in Review

Carderock Capital Management reduced its Monolithic Power Systems (MPWR) stake by 12% in Q3 2026, selling an estimated $1.63M and leaving 9,054 shares worth $12.2M. The position accounts for 2.8% of the portfolio, ranked #11.

Carderock Capital Management first reported a position in MPWR in Q1 2024 and has held it in 11 quarters since. The position peaked at $14.2M in Q2 2026. 763 funds tracked by Wall St. Rank hold MPWR as of Q3 2026.

  • Carderock Capital Management held 9,054 shares of Monolithic Power Systems worth $12.2M as of Q3 2026.
  • Carderock Capital Management sold 1,247 Monolithic Power Systems shares in Q3 2026, an estimated $1.63M.
  • Monolithic Power Systems made up 2.8% of Carderock Capital Management's portfolio in Q3 2026, its #11 holding.
  • Carderock Capital Management first reported a position in Monolithic Power Systems in Q1 2024 and has held it in 11 quarters since.
  • Carderock Capital Management's Monolithic Power Systems position peaked at $14.2M in Q2 2026.
  • 763 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q3 2026.

Based on Carderock Capital Management's 13F filing for Q3 2026, filed 22 Oct 2026.