Mariner
MPWR icon

Mariner’s Monolithic Power Systems MPWR Stock Holding History

Mariner’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 		$47.5M Sell
34,399
-6,764
-16% -$10.2M 0.05% 296
2026
Q1 		$44.9M Buy
41,163
+38,487
+1,438% +$42M 0.05% 288
2025
Q4 		$2.43M Sell
2,676
-8,185
-75% -$7.88M ﹤0.01% 1388
2025
Q3 		$10M Sell
10,861
-379
-3% -$307K 0.01% 644
2025
Q2 		$8.22M Buy
11,240
+1,008
+10% +$642K 0.01% 671
2025
Q1 		$5.93M Buy
10,232
+789
+8% +$497K 0.01% 752
2024
Q4 		$5.59M Sell
9,443
-1,016
-10% -$736K 0.01% 755
2024
Q3 		$9.67M Buy
10,459
+1,440
+16% +$1.24M 0.02% 546
2024
Q2 		$7.41M Buy
9,019
+1,066
+13% +$769K 0.01% 594
2024
Q1 		$5.39M Buy
7,953
+11
+0.1% +$7.34K 0.01% 698
2023
Q4 		$5.01M Buy
7,942
+3,431
+76% +$1.79M 0.01% 680
2023
Q3 		$2.08M Buy
4,511
+137
+3% +$70.1K 0.01% 955
2023
Q2 		$2.36M Buy
4,374
+88
+2% +$41.8K 0.01% 908
2023
Q1 		$2.15M Sell
4,286
-28
-0.6% -$12.9K 0.01% 928
2022
Q4 		$1.53M Sell
4,314
-386
-8% -$139K ﹤0.01% 1037
2022
Q3 		$1.71M Buy
+4,700
New +$2.09M 0.01% 839

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

Mariner's MPWR Position: Q2 2026 in Review

Mariner reduced its Monolithic Power Systems (MPWR) stake by 16% in Q2 2026, selling an estimated $10.2M and leaving 34,399 shares worth $47.5M. The position accounts for 0.05% of the portfolio, ranked #296.

Mariner first reported a position in MPWR in Q3 2022 and has held it in 16 quarters since. 1,235 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Mariner held 34,399 shares of Monolithic Power Systems worth $47.5M as of Q2 2026.
  • Mariner sold 6,764 Monolithic Power Systems shares in Q2 2026, an estimated $10.2M.
  • Monolithic Power Systems made up 0.05% of Mariner's portfolio in Q2 2026, its #296 holding.
  • Mariner first reported a position in Monolithic Power Systems in Q3 2022 and has held it in 16 quarters since.
  • 1,235 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.