Citadel Advisors
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Citadel Advisors’s Monolithic Power Systems MPWR Stock Holding History

Citadel Advisors’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 		$54.2M Buy
49,600
+5,100
+11% +$5.57M 0.01% 1288
2025
Q4 		$40.3M Sell
44,500
-8,800
-17% -$8.47M 0.01% 1617
2025
Q3 		$49.1M Buy
53,300
+10,700
+25% +$8.68M 0.01% 1396
2025
Q2 		$31.2M Sell
42,600
-46,800
-52% -$29.8M 0.01% 1648
2025
Q1 		$51.9M Buy
89,400
+27,100
+43% +$17.1M 0.01% 1114
2024
Q4 		$36.9M Buy
62,300
+29,900
+92% +$21.7M 0.01% 1547
2024
Q3 		$30M Sell
32,400
-21,800
-40% -$18.8M 0.01% 1684
2024
Q2 		$44.5M Sell
54,200
-18,900
-26% -$13.6M 0.01% 1238
2024
Q1 		$49.5M Sell
73,100
-10,400
-12% -$6.94M 0.01% 1219
2023
Q4 		$52.7M Buy
83,500
+33,700
+68% +$17.6M 0.01% 1147
2023
Q3 		$23M Sell
49,800
-7,700
-13% -$3.94M ﹤0.01% 1714
2023
Q2 		$31.1M Sell
57,500
-15,000
-21% -$7.13M 0.01% 1440
2023
Q1 		$36.3M Buy
72,500
+13,800
+24% +$6.34M 0.01% 1359
2022
Q4 		$20.8M Sell
58,700
-25,600
-30% -$9.2M ﹤0.01% 1929
2022
Q3 		$30.6M Sell
84,300
-1,600
-2% -$712K 0.01% 1457
2022
Q2 		$33M Buy
85,900
+45,100
+111% +$19.1M 0.01% 1399
2022
Q1 		$19.8M Buy
40,800
+17,700
+77% +$7.71M ﹤0.01% 2002
2021
Q4 		$11.4M Hold
23,100
– – ﹤0.01% 2849
2021
Q3 		$11.2M Sell
23,100
-4,200
-15% -$1.91M ﹤0.01% 2885
2021
Q2 		$10.2M Sell
27,300
-5,300
-16% -$1.87M ﹤0.01% 3032
2021
Q1 		$11.5M Sell
32,600
-14,300
-30% -$5.21M ﹤0.01% 2774
2020
Q4 		$17.2M Buy
46,900
+39,600
+542% +$12.7M ﹤0.01% 1964
2020
Q3 		$2.04M Sell
7,300
-700
-9% -$182K ﹤0.01% 4672
2020
Q2 		$1.9M Buy
8,000
+200
+3% +$40.5K ﹤0.01% 4677
2020
Q1 		$1.31M Buy
7,800
+200
+3% +$34.3K ﹤0.01% 4856
2019
Q4 		$1.35M Buy
7,600
+100
+1% +$16K ﹤0.01% 5050
2019
Q3 		$1.17M Buy
7,500
+2,100
+39% +$314K ﹤0.01% 5323
2019
Q2 		$733K Sell
5,400
-10,200
-65% -$1.39M ﹤0.01% 6218
2019
Q1 		$2.11M Buy
15,600
+8,900
+133% +$1.17M ﹤0.01% 4377
2018
Q4 		$779K Sell
6,700
-4,600
-41% -$550K ﹤0.01% 5700
2018
Q3 		$1.42M Buy
11,300
+2,100
+23% +$293K ﹤0.01% 4953
2018
Q2 		$1.23M Buy
9,200
+4,700
+104% +$599K ﹤0.01% 4863
2018
Q1 		$521K Sell
4,500
-2,700
-38% -$320K ﹤0.01% 5815
2017
Q4 		$809K Buy
7,200
+300
+4% +$34.8K ﹤0.01% 4958
2017
Q3 		$735K Sell
6,900
-1,000
-13% -$102K ﹤0.01% 4769
2017
Q2 		$762K Buy
7,900
+300
+4% +$28.6K ﹤0.01% 4511
2017
Q1 		$700K Buy
7,600
+4,200
+124% +$372K ﹤0.01% 4504
2016
Q4 		$279K Sell
3,400
-4,800
-59% -$385K ﹤0.01% 5784
2016
Q3 		$660K Sell
8,200
-11,100
-58% -$820K ﹤0.01% 4424
2016
Q2 		$1.32M Buy
19,300
+12,700
+192% +$832K ﹤0.01% 3228
2016
Q1 		$420K Sell
6,600
-700
-10% -$41.7K ﹤0.01% 4640
2015
Q4 		$465K Buy
7,300
+5,200
+248% +$323K ﹤0.01% 4558
2015
Q3 		$108K Buy
2,100
+1,300
+163% +$64.4K ﹤0.01% 6883
2015
Q2 		$41K Sell
800
-2,800
-78% -$148K ﹤0.01% 7792
2015
Q1 		$190K Sell
3,600
-7,800
-68% -$393K ﹤0.01% 6237
2014
Q4 		$567K Buy
11,400
+5,900
+107% +$265K ﹤0.01% 4547
2014
Q3 		$242K Buy
5,500
+3,200
+139% +$141K ﹤0.01% 5517
2014
Q2 		$97K Sell
2,300
-200
-8% -$7.75K ﹤0.01% 6255
2014
Q1 		$97K Sell
2,500
-300
-11% -$10.6K ﹤0.01% 6224
2013
Q4 		$97K Buy
2,800
+300
+12% +$9.59K ﹤0.01% 5639
2013
Q3 		$76K Sell
2,500
-400
-14% -$11.2K ﹤0.01% 5542
2013
Q2 		$70K Buy
+2,900
New +$68.8K ﹤0.01% 5464

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

Citadel Advisors's MPWR Position: Q1 2026 in Review

Citadel Advisors increased its Monolithic Power Systems (MPWR) stake by 20% in Q1 2026, buying an estimated $2.49M and bringing the position to 13,512 shares worth $14.8M. The position accounts for ﹤0.01% of the portfolio, ranked #2703.

Citadel Advisors first reported a position in MPWR in Q2 2013 and has held it in 48 quarters since. The position peaked at $240M in Q3 2025. 1,115 funds tracked by Wall St. Rank hold MPWR as of Q1 2026.

  • Citadel Advisors held 13,512 shares of Monolithic Power Systems worth $14.8M as of Q1 2026.
  • Citadel Advisors bought 2,283 Monolithic Power Systems shares in Q1 2026, an estimated $2.49M.
  • Monolithic Power Systems made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #2703 holding.
  • Citadel Advisors first reported a position in Monolithic Power Systems in Q2 2013 and has held it in 48 quarters since.
  • Citadel Advisors's Monolithic Power Systems position peaked at $240M in Q3 2025.
  • 1,115 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.