Walleye Trading
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Walleye Trading’s Monolithic Power Systems MPWR Stock Holding History

Walleye Trading’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 		$22.1M Buy
20,200
+10,000
+98% +$10.9M 0.04% 474
2025
Q4 		$9.24M Buy
10,200
+900
+10% +$866K 0.01% 968
2025
Q3 		$8.56M Sell
9,300
-400
-4% -$324K 0.01% 976
2025
Q2 		$7.09M Sell
9,700
-11,500
-54% -$7.33M 0.01% 996
2025
Q1 		$12.3M Buy
21,200
+14,100
+199% +$8.89M 0.03% 624
2024
Q4 		$4.2M Buy
7,100
+4,000
+129% +$2.9M 0.01% 1257
2024
Q3 		$2.87M Sell
3,100
-5,600
-64% -$4.83M 0.01% 1459
2024
Q2 		$7.15M Buy
8,700
+1,700
+24% +$1.23M 0.02% 861
2024
Q1 		$4.74M Buy
7,000
+5,700
+438% +$3.81M 0.01% 1156
2023
Q4 		$820K Sell
1,300
-700
-35% -$366K ﹤0.01% 2650
2023
Q3 		$924K Sell
2,000
-9,600
-83% -$4.91M ﹤0.01% 2434
2023
Q2 		$6.27M Buy
11,600
+1,200
+12% +$570K 0.02% 815
2023
Q1 		$5.21M Buy
10,400
+8,000
+333% +$3.68M 0.01% 1014
2022
Q4 		$849K Buy
2,400
+300
+14% +$108K ﹤0.01% 2356
2022
Q3 		$763K Sell
2,100
-5,400
-72% -$2.4M ﹤0.01% 2492
2022
Q2 		$2.88M Sell
7,500
-4,000
-35% -$1.69M 0.01% 1384
2022
Q1 		$5.58M Buy
11,500
+1,500
+15% +$654K 0.02% 949
2021
Q4 		$4.93M Sell
10,000
-200
-2% -$103K 0.02% 987
2021
Q3 		$4.94M Buy
10,200
+6,100
+149% +$2.77M 0.02% 934
2021
Q2 		$1.53M Buy
4,100
+3,000
+273% +$1.06M 0.01% 1740
2021
Q1 		$389K Buy
1,100
+400
+57% +$146K ﹤0.01% 2956
2020
Q4 		$256K Buy
+700
New +$224K ﹤0.01% 3300
2020
Q3 		– Sell
-1,600
Closed -$379K – 4425
2020
Q2 		$379K Sell
1,600
-1,200
-43% -$243K ﹤0.01% 2512
2020
Q1 		$469K Sell
2,800
-3,100
-53% -$531K ﹤0.01% 1917
2019
Q4 		$1.05M Buy
5,900
+5,100
+638% +$815K 0.01% 1760
2019
Q3 		$125K Hold
800
– – ﹤0.01% 3225
2019
Q2 		$109K Sell
800
-2,900
-78% -$394K ﹤0.01% 3272
2019
Q1 		$501K Buy
+3,700
New +$486K ﹤0.01% 2272
2018
Q4 		– Sell
-2,700
Closed -$339K – 5055
2018
Q3 		$339K Sell
2,700
-3,000
-53% -$418K ﹤0.01% 3301
2018
Q2 		$762K Sell
5,700
-3,000
-34% -$382K ﹤0.01% 2398
2018
Q1 		$1.01M Buy
8,700
+5,900
+211% +$699K 0.01% 1926
2017
Q4 		$312 Sell
2,800
-1,500
-35% -$174K ﹤0.01% 3060
2017
Q3 		$458 Sell
4,300
-800
-16% -$81.2K ﹤0.01% 2555
2017
Q2 		$492 Buy
5,100
+3,600
+240% +$343K ﹤0.01% 2392
2017
Q1 		$137 Buy
1,500
+700
+88% +$62K ﹤0.01% 3210
2016
Q4 		$65K Buy
800
+400
+100% +$32.1K ﹤0.01% 3500
2016
Q3 		$32K Buy
+400
New +$29.6K ﹤0.01% 3991
2016
Q2 		– Sell
-200
Closed -$13K – 5581
2016
Q1 		$13K Buy
+200
New +$11.9K ﹤0.01% 4647

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

Walleye Trading's MPWR Position: Q4 2025 in Review

Walleye Trading sold out of Monolithic Power Systems (MPWR) in Q4 2025, closing a stake of 1,271 shares — an estimated $1.22M sold.

Walleye Trading first reported a position in MPWR in Q2 2015 and held it in 24 quarters. The position peaked at $1.75M in Q4 2023. 1,059 funds tracked by Wall St. Rank hold MPWR as of Q4 2025.

  • Walleye Trading reported no remaining Monolithic Power Systems position as of Q4 2025 after selling out during the quarter.
  • Walleye Trading sold 1,271 Monolithic Power Systems shares in Q4 2025, an estimated $1.22M.
  • Walleye Trading first reported a position in Monolithic Power Systems in Q2 2015 and held it in 24 quarters.
  • Walleye Trading's Monolithic Power Systems position peaked at $1.75M in Q4 2023.
  • 1,059 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q4 2025.

Based on Walleye Trading's 13F filing for Q4 2025, filed 13 Feb 2026.