Asset Management One
MPWR icon

Asset Management One’s Monolithic Power Systems MPWR Stock Holding History

Asset Management One’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
Q1 		$23.1M Sell
21,157
-316
-1% -$345K 0.07% 247
2025
Q4 		$20M Buy
21,473
+683
+3% +$657K 0.06% 290
2025
Q3 		$19.1M Sell
20,790
-678
-3% -$550K 0.06% 298
2025
Q2 		$15.7M Buy
21,468
+714
+3% +$455K 0.05% 328
2025
Q1 		$12M Buy
20,754
+242
+1% +$152K 0.04% 386
2024
Q4 		$12.6M Buy
20,512
+1,034
+5% +$749K 0.04% 379
2024
Q3 		$18M Buy
19,478
+153
+0.8% +$132K 0.06% 284
2024
Q2 		$15.9M Sell
19,325
-133
-0.7% -$96K 0.06% 292
2024
Q1 		$13.2M Buy
19,458
+196
+1% +$131K 0.05% 352
2023
Q4 		$12.2M Sell
19,262
-245
-1% -$128K 0.05% 366
2023
Q3 		$9.01M Buy
19,507
+270
+1% +$138K 0.04% 416
2023
Q2 		$10.4M Sell
19,237
-1,771
-8% -$841K 0.04% 407
2023
Q1 		$10.5M Sell
21,008
-674
-3% -$310K 0.05% 393
2022
Q4 		$7.66M Sell
21,682
-2,047
-9% -$735K 0.04% 456
2022
Q3 		$8.62M Sell
23,729
-2,013
-8% -$895K 0.04% 412
2022
Q2 		$9.88M Sell
25,742
-796
-3% -$336K 0.05% 399
2022
Q1 		$12.9M Buy
26,538
+373
+1% +$163K 0.05% 380
2021
Q4 		$13M Buy
26,165
+2,099
+9% +$1.08M 0.05% 418
2021
Q3 		$11.7M Buy
24,066
+451
+2% +$205K 0.04% 423
2021
Q2 		$8.82M Buy
23,615
+4,373
+23% +$1.54M 0.03% 525
2021
Q1 		$6.8M Sell
19,242
-974
-5% -$355K 0.03% 572
2020
Q4 		$7.13M Buy
+20,216
New +$6.48M 0.03% 552
2020
Q1 		– Sell
-2,580
Closed -$459K – 1069
2019
Q4 		$459K Sell
2,580
-1,970
-43% -$315K ﹤0.01% 950
2019
Q3 		$709K Sell
4,550
-3,999
-47% -$598K ﹤0.01% 902
2019
Q2 		$1.16M Sell
8,549
-3,879
-31% -$528K 0.01% 870
2019
Q1 		$1.68M Sell
12,428
-4,448
-26% -$584K 0.01% 822
2018
Q4 		$1.94M Hold
16,876
– – ﹤0.01% 787
2018
Q3 		$2.13M Sell
16,876
-13,651
-45% -$1.9M ﹤0.01% 813
2018
Q2 		$4.1M Buy
30,527
+24,638
+418% +$3.14M 0.01% 767
2018
Q1 		$682K Buy
+5,889
New +$698K ﹤0.01% 923
2017
Q4 		– Sell
-4,180
Closed -$445K – 1036
2017
Q3 		$445K Buy
4,180
+451
+12% +$45.8K ﹤0.01% 926
2017
Q2 		$361K Sell
3,729
-1,249
-25% -$119K ﹤0.01% 900
2017
Q1 		$458K Sell
4,978
-1,978
-28% -$175K ﹤0.01% 903
2016
Q4 		$576K Buy
6,956
+250
+4% +$20.1K ﹤0.01% 859
2016
Q3 		$532K Sell
6,706
-1,360
-17% -$100K 0.01% 1025
2016
Q2 		$542K Sell
8,066
-1,946
-19% -$127K 0.01% 1032
2016
Q1 		$628K Sell
10,012
-710
-7% -$42.3K 0.01% 1013
2015
Q4 		$695K Sell
10,722
-461
-4% -$28.6K 0.01% 987
2015
Q3 		$560K Sell
11,183
-165
-1% -$8.18K 0.01% 1022
2015
Q2 		$576K Sell
11,348
-469
-4% -$24.8K 0.01% 1063
2015
Q1 		$627K Sell
11,817
-715
-6% -$36K 0.01% 1036
2014
Q4 		$625K Sell
12,532
-928
-7% -$41.7K 0.01% 982
2014
Q3 		$598K Buy
+13,460
New +$592K 0.01% 976

Other funds holding MPWR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Asset Management One's MPWR Position: Q1 2026 in Review

Asset Management One reduced its Monolithic Power Systems (MPWR) stake by 1.5% in Q1 2026, selling an estimated $345K and leaving 21,157 shares worth $23.1M. The position accounts for 0.07% of the portfolio, ranked #247.

Asset Management One first reported a position in MPWR in Q3 2014 and has held it in 43 quarters since. 1,114 funds tracked by Wall St. Rank hold MPWR as of Q1 2026.

  • Asset Management One held 21,157 shares of Monolithic Power Systems worth $23.1M as of Q1 2026.
  • Asset Management One sold 316 Monolithic Power Systems shares in Q1 2026, an estimated $345K.
  • Monolithic Power Systems made up 0.07% of Asset Management One's portfolio in Q1 2026, its #247 holding.
  • Asset Management One first reported a position in Monolithic Power Systems in Q3 2014 and has held it in 43 quarters since.
  • 1,114 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q1 2026.

Based on Asset Management One's 13F filing for Q1 2026, filed 8 May 2026.