Acadian Asset Management
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Acadian Asset Management’s Magnite MGNI Stock Holding History

Acadian Asset Management’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
Q2 		$459K Buy
24,288
+20,602
+559% +$295K ﹤0.01% 1476
2026
Q1 		$43K Buy
+3,686
New +$49.4K ﹤0.01% 1874
2024
Q4 		– Sell
-1,259
Closed -$17K – 1958
2024
Q3 		$17K Buy
+1,259
New +$17.2K ﹤0.01% 1999
2021
Q1 		– Sell
-1,060
Closed -$33K – 2218
2020
Q4 		$33K Buy
+1,060
New +$16K ﹤0.01% 2043
2020
Q2 		– Sell
-1,216,603
Closed -$6.75M – 2296
2020
Q1 		$6.75M Buy
1,216,603
+269,963
+29% +$2.48M 0.04% 332
2019
Q4 		$7.72M Sell
946,640
-22,136
-2% -$182K 0.04% 361
2019
Q3 		$8.44M Buy
968,776
+346,279
+56% +$3.04M 0.04% 371
2019
Q2 		$3.96M Buy
622,497
+67,369
+12% +$414K 0.02% 447
2019
Q1 		$3.38M Buy
555,128
+383,622
+224% +$1.97M 0.01% 537
2018
Q4 		$640K Buy
171,506
+129,667
+310% +$495K ﹤0.01% 851
2018
Q3 		$150K Buy
41,839
+27,318
+188% +$96.6K ﹤0.01% 1126
2018
Q2 		$41K Sell
14,521
-66,981
-82% -$159K ﹤0.01% 1432
2018
Q1 		$147K Buy
+81,502
New +$154K ﹤0.01% 1134
2017
Q2 		– Sell
-293,398
Closed -$1.73M – 1525
2017
Q1 		$1.73M Buy
293,398
+188,731
+180% +$1.47M 0.01% 655
2016
Q4 		$778K Sell
104,667
-412,407
-80% -$3.21M ﹤0.01% 767
2016
Q3 		$4.28M Buy
+517,074
New +$5.5M 0.02% 397
2016
Q2 		– Sell
-5,097
Closed -$93K – 1472
2016
Q1 		$93K Buy
+5,097
New +$78K ﹤0.01% 1034

Other funds holding MGNI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 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 $226B AUM 44.75% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

Acadian Asset Management's MGNI Position: Q2 2026 in Review

Acadian Asset Management increased its Magnite (MGNI) stake by 559% in Q2 2026, buying an estimated $295K and bringing the position to 24,288 shares worth $459K. The position accounts for ﹤0.01% of the portfolio, ranked #1476.

Acadian Asset Management first reported a position in MGNI in Q1 2016 and has held it in 17 quarters since. The position peaked at $8.44M in Q3 2019. 311 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • Acadian Asset Management held 24,288 shares of Magnite worth $459K as of Q2 2026.
  • Acadian Asset Management bought 20,602 Magnite shares in Q2 2026, an estimated $295K.
  • Magnite made up ﹤0.01% of Acadian Asset Management's portfolio in Q2 2026, its #1476 holding.
  • Acadian Asset Management first reported a position in Magnite in Q1 2016 and has held it in 17 quarters since.
  • Acadian Asset Management's Magnite position peaked at $8.44M in Q3 2019.
  • 311 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Acadian Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.