AT
MPWR icon

American Trust’s Monolithic Power Systems MPWR Stock Holding History

American Trust’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 		$890K Sell
644
-168
-21% -$252K 0.07% 120
2026
Q1 		$888K Sell
812
-130
-14% -$142K 0.08% 116
2025
Q4 		$854K Sell
942
-25
-3% -$24.1K 0.07% 127
2025
Q3 		$890K Buy
967
+585
+153% +$474K 0.08% 133
2025
Q2 		$279K Buy
+382
New +$243K 0.03% 232
2025
Q1 		– Sell
-431
Closed -$255K – 228
2024
Q4 		$255K Sell
431
-5
-1% -$3.62K 0.02% 258
2024
Q3 		$403K Buy
436
+3
+0.7% +$2.59K 0.03% 148
2024
Q2 		$356K Sell
433
-62
-13% -$44.7K 0.03% 152
2024
Q1 		$335K Sell
495
-118
-19% -$78.8K 0.03% 185
2023
Q4 		$387K Sell
613
-66
-10% -$34.5K 0.03% 172
2023
Q3 		$314K Sell
679
-162
-19% -$82.9K 0.02% 202
2023
Q2 		$454K Buy
841
+83
+11% +$39.4K 0.03% 231
2023
Q1 		$379K Sell
758
-23
-3% -$10.6K 0.03% 262
2022
Q4 		$276K Buy
781
+185
+31% +$66.5K 0.03% 324
2022
Q3 		$217K Sell
596
-16
-3% -$7.12K 0.02% 368
2022
Q2 		$235K Buy
+612
New +$259K 0.02% 375

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

American Trust's MPWR Position: Q2 2026 in Review

American Trust reduced its Monolithic Power Systems (MPWR) stake by 21% in Q2 2026, selling an estimated $252K and leaving 644 shares worth $890K. The position accounts for 0.07% of the portfolio, ranked #120.

American Trust first reported a position in MPWR in Q2 2022 and has held it in 16 quarters since. The position peaked at $890K in Q3 2025. 1,237 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • American Trust held 644 shares of Monolithic Power Systems worth $890K as of Q2 2026.
  • American Trust sold 168 Monolithic Power Systems shares in Q2 2026, an estimated $252K.
  • Monolithic Power Systems made up 0.07% of American Trust's portfolio in Q2 2026, its #120 holding.
  • American Trust first reported a position in Monolithic Power Systems in Q2 2022 and has held it in 16 quarters since.
  • American Trust's Monolithic Power Systems position peaked at $890K in Q3 2025.
  • 1,237 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on American Trust's 13F filing for Q2 2026, filed 14 Aug 2026.