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

Calamos 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
Q2 		$4.32M Sell
3,122
-1,246
-29% -$1.87M 0.01% 570
2026
Q1 		$4.78M Buy
4,368
+1,478
+51% +$1.61M 0.02% 564
2025
Q4 		$2.62M Sell
2,890
-226
-7% -$217K 0.01% 598
2025
Q3 		$2.87M Buy
3,116
+343
+12% +$278K 0.01% 600
2025
Q2 		$2.03M Buy
+2,773
New +$1.77M 0.01% 630
2024
Q4 		– Sell
-317
Closed -$293K – 940
2024
Q3 		$293K Sell
317
-2,273
-88% -$1.96M ﹤0.01% 761
2024
Q2 		$2.13M Buy
2,590
+2,073
+401% +$1.5M 0.01% 587
2024
Q1 		$350K Sell
517
-25,250
-98% -$16.9M ﹤0.01% 717
2023
Q4 		$16.3M Sell
25,767
-354
-1% -$185K 0.08% 297
2023
Q3 		$12.1M Sell
26,121
-1,034
-4% -$529K 0.06% 344
2023
Q2 		$14.7M Sell
27,155
-2,093
-7% -$994K 0.07% 320
2023
Q1 		$14.6M Sell
29,248
-3,265
-10% -$1.5M 0.07% 333
2022
Q4 		$11.5M Buy
32,513
+31,381
+2,772% +$11.3M 0.05% 425
2022
Q3 		$411K Sell
1,132
-2,273
-67% -$1.01M ﹤0.01% 1025
2022
Q2 		$1.31M Buy
3,405
+836
+33% +$353K 0.01% 962
2022
Q1 		$1.25M Hold
2,569
– – ﹤0.01% 984
2021
Q4 		$1.27M Sell
2,569
-1,024
-28% -$529K ﹤0.01% 964
2021
Q3 		$1.74M Buy
3,593
+49
+1% +$22.3K 0.01% 796
2021
Q2 		$1.32M Hold
3,544
– – 0.01% 774
2021
Q1 		$1.25M Sell
3,544
-1,662
-32% -$605K 0.01% 749
2020
Q4 		$1.91M Buy
5,206
+1,270
+32% +$407K 0.01% 638
2020
Q3 		$1.1M Sell
3,936
-43
-1% -$11.2K 0.01% 645
2020
Q2 		$943K Buy
+3,979
New +$805K 0.01% 641
2020
Q1 		– Sell
-1,288
Closed -$229K – 759
2019
Q4 		$229K Buy
+1,288
New +$206K ﹤0.01% 749

Other funds holding MPWR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
Citigroup
Citigroup New York $303B AUM 53.02% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $344B AUM 42.99% 1-Year Est. Return
SG Americas Securities
SG Americas Securities New York $179B AUM 65.34% 1-Year Est. Return
VNIM
Vaughan Nelson Investment Management Houston, Texas $11.3B AUM 53% 1-Year Est. Return

Calamos Advisors's MPWR Position: Q2 2026 in Review

Calamos Advisors reduced its Monolithic Power Systems (MPWR) stake by 29% in Q2 2026, selling an estimated $1.87M and leaving 3,122 shares worth $4.32M. The position accounts for 0.01% of the portfolio, ranked #570.

Calamos Advisors first reported a position in MPWR in Q4 2019 and has held it in 24 quarters since. The position peaked at $16.3M in Q4 2023. 677 funds tracked by Wall St. Rank hold MPWR as of Q2 2026.

  • Calamos Advisors held 3,122 shares of Monolithic Power Systems worth $4.32M as of Q2 2026.
  • Calamos Advisors sold 1,246 Monolithic Power Systems shares in Q2 2026, an estimated $1.87M.
  • Monolithic Power Systems made up 0.01% of Calamos Advisors's portfolio in Q2 2026, its #570 holding.
  • Calamos Advisors first reported a position in Monolithic Power Systems in Q4 2019 and has held it in 24 quarters since.
  • Calamos Advisors's Monolithic Power Systems position peaked at $16.3M in Q4 2023.
  • 677 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q2 2026.

Based on Calamos Advisors's 13F filing for Q2 2026, filed 31 Jul 2026.