Parnassus Investments
MPWR icon

Parnassus Investments’s Monolithic Power Systems MPWR Stock Holding History

Parnassus Investments’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 		$24.3M Sell
17,566
-606
-3% -$910K 0.06% 100
2026
Q1 		$19.9M Sell
18,172
-8,418
-32% -$9.2M 0.06% 101
2025
Q4 		$24.1M Sell
26,590
-821
-3% -$790K 0.06% 103
2025
Q3 		$25.2M Sell
27,411
-301
-1% -$244K 0.06% 109
2025
Q2 		$20.3M Sell
27,712
-738
-3% -$470K 0.05% 107
2025
Q1 		$16.5M Hold
28,450
– – 0.04% 111
2024
Q4 		$16.8M Buy
28,450
+5,644
+25% +$4.09M 0.04% 110
2024
Q3 		$21.1M Sell
22,806
-7,857
-26% -$6.78M 0.04% 106
2024
Q2 		$25.2M Hold
30,663
– – 0.05% 101
2024
Q1 		$20.8M Hold
30,663
– – 0.04% 112
2023
Q4 		$19.3M Buy
30,663
+2,345
+8% +$1.23M 0.04% 105
2023
Q3 		$13.1M Hold
28,318
– – 0.03% 116
2023
Q2 		$15.3M Hold
28,318
– – 0.04% 109
2023
Q1 		$14.2M Sell
28,318
-11,132
-28% -$5.12M 0.04% 111
2022
Q4 		$13.9M Buy
39,450
+23,294
+144% +$8.37M 0.03% 114
2022
Q3 		$5.87M Sell
16,156
-34,106
-68% -$15.2M 0.02% 125
2022
Q2 		$19.3M Hold
50,262
– – 0.05% 110
2022
Q1 		$24.4M Hold
50,262
– – 0.05% 115
2021
Q4 		$24.8M Hold
50,262
– – 0.05% 111
2021
Q3 		$24.4M Hold
50,262
– – 0.05% 112
2021
Q2 		$18.8M Hold
50,262
– – 0.04% 114
2021
Q1 		$17.8M Hold
50,262
– – 0.04% 115
2020
Q4 		$18.4M Hold
50,262
– – 0.05% 99
2020
Q3 		$14.1M Sell
50,262
-1,152
-2% -$300K 0.04% 102
2020
Q2 		$12.2M Buy
+51,414
New +$10.4M 0.04% 102
2019
Q4 		– Sell
-112,827
Closed -$17.6M – 98
2019
Q3 		$17.6M Hold
112,827
– – 0.06% 91
2019
Q2 		$15.3M Buy
+112,827
New +$15.3M 0.06% 88

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

Parnassus Investments's MPWR Position: Q2 2026 in Review

Parnassus Investments reduced its Monolithic Power Systems (MPWR) stake by 3.3% in Q2 2026, selling an estimated $910K and leaving 17,566 shares worth $24.3M. The position accounts for 0.06% of the portfolio, ranked #100.

Parnassus Investments first reported a position in MPWR in Q2 2019 and has held it in 27 quarters since. The position peaked at $25.2M in Q3 2025. 1,240 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Parnassus Investments held 17,566 shares of Monolithic Power Systems worth $24.3M as of Q2 2026.
  • Parnassus Investments sold 606 Monolithic Power Systems shares in Q2 2026, an estimated $910K.
  • Monolithic Power Systems made up 0.06% of Parnassus Investments's portfolio in Q2 2026, its #100 holding.
  • Parnassus Investments first reported a position in Monolithic Power Systems in Q2 2019 and has held it in 27 quarters since.
  • Parnassus Investments's Monolithic Power Systems position peaked at $25.2M in Q3 2025.
  • 1,240 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Parnassus Investments's 13F filing for Q2 2026, filed 29 Jul 2026.