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Lee Ainslie’s Monolithic Power Systems MPWR Stock Holding History

Lee Ainslie’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 		$820K Buy
+593
New +$890K 0.01% 122
2024
Q1 		– Sell
-588
Closed -$371K – 502
2023
Q4 		$371K Buy
+588
New +$307K 0.01% 246
2023
Q1 		– Sell
-2,444
Closed -$864K – 515
2022
Q4 		$864K Buy
2,444
+1,784
+270% +$641K 0.02% 153
2022
Q3 		$240K Buy
+660
New +$294K 0.01% 282
2020
Q4 		– Sell
-3,605
Closed -$1.01M – 740
2020
Q3 		$1.01M Sell
3,605
-1,868
-34% -$486K 0.02% 287
2020
Q2 		$1.3M Sell
5,473
-16,201
-75% -$3.28M 0.03% 260
2020
Q1 		$3.63M Buy
21,674
+11,736
+118% +$2.01M 0.08% 114
2019
Q4 		$1.77M Buy
9,938
+2,487
+33% +$397K 0.03% 279
2019
Q3 		$1.16M Buy
+7,451
New +$1.11M 0.02% 263

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

Lee Ainslie's MPWR Position: Q2 2026 in Review

Lee Ainslie opened a new position in Monolithic Power Systems (MPWR) in Q2 2026: 593 shares worth $820K. The stake represents 0.01% of the portfolio and ranks #122 among its holdings. This is a return to the name: Lee Ainslie previously reported a position in MPWR as recently as Q4 2023.

Lee Ainslie first reported a position in MPWR in Q3 2019 and has held it in 9 quarters since. The position peaked at $3.63M in Q1 2020. 1,235 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Lee Ainslie held 593 shares of Monolithic Power Systems worth $820K as of Q2 2026.
  • Monolithic Power Systems was a new Lee Ainslie position in Q2 2026.
  • Monolithic Power Systems made up 0.01% of Lee Ainslie's portfolio in Q2 2026, its #122 holding.
  • Lee Ainslie first reported a position in Monolithic Power Systems in Q3 2019 and has held it in 9 quarters since.
  • Lee Ainslie's Monolithic Power Systems position peaked at $3.63M in Q1 2020.
  • 1,235 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

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