Calamos Advisors
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Calamos Advisors’s Magnite MGNI Stock Holding History

Calamos Advisors’s Portfolio MGNI Stock Details MGNI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-113,457
Closed -$1.84M – 1244
2025
Q4 		$1.84M Buy
113,457
+61,672
+119% +$1.02M 0.01% 628
2025
Q3 		$1.13M Sell
51,785
-925
-2% -$21.8K ﹤0.01% 693
2025
Q2 		$1.27M Sell
52,710
-12,565
-19% -$185K 0.01% 671
2025
Q1 		$745K Buy
65,275
+30,132
+86% +$480K ﹤0.01% 682
2024
Q4 		$559K Sell
35,143
-155,837
-82% -$2.29M ﹤0.01% 717
2024
Q3 		$2.65M Buy
190,980
+36,848
+24% +$502K 0.01% 583
2024
Q2 		$2.05M Buy
+154,132
New +$1.68M 0.01% 588
2023
Q2 		– Sell
-44,369
Closed -$411K – 1035
2023
Q1 		$411K Buy
+44,369
New +$473K ﹤0.01% 859
2021
Q4 		– Sell
-52,468
Closed -$1.47M – 1143
2021
Q3 		$1.47M Sell
52,468
-112,804
-68% -$3.39M 0.01% 820
2021
Q2 		$5.59M Sell
165,272
-94,132
-36% -$3.19M 0.03% 535
2021
Q1 		$10.8M Sell
259,404
-198,913
-43% -$8.62M 0.06% 319
2020
Q4 		$14.1M Buy
+458,317
New +$6.94M 0.08% 262
2020
Q2 		– Sell
-139,898
Closed -$778K – 756
2020
Q1 		$778K Sell
139,898
-52,743
-27% -$485K 0.01% 615
2019
Q4 		$1.57M Sell
192,641
-358,716
-65% -$2.95M 0.01% 636
2019
Q3 		$4.8M Sell
551,357
-3,055
-0.6% -$26.8K 0.03% 521
2019
Q2 		$3.53M Buy
+554,412
New +$3.4M 0.02% 571

Other funds holding MGNI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Calamos Advisors's MGNI Position: Q1 2026 in Review

Calamos Advisors sold out of Magnite (MGNI) in Q1 2026, closing a stake of 113,457 shares — an estimated $1.84M sold.

Calamos Advisors first reported a position in MGNI in Q2 2019 and held it in 16 quarters. The position peaked at $14.1M in Q4 2020. 296 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

  • Calamos Advisors reported no remaining Magnite position as of Q1 2026 after selling out during the quarter.
  • Calamos Advisors sold 113,457 Magnite shares in Q1 2026, an estimated $1.84M.
  • Calamos Advisors first reported a position in Magnite in Q2 2019 and held it in 16 quarters.
  • Calamos Advisors's Magnite position peaked at $14.1M in Q4 2020.
  • 296 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.