Marshall Wace
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Marshall Wace’s Magnite MGNI Stock Holding History

Marshall Wace’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 		$505K Buy
42,468
+13,705
+48% +$184K ﹤0.01% 2451
2025
Q4 		$467K Buy
28,763
+16,115
+127% +$267K ﹤0.01% 2264
2025
Q3 		$275K Buy
+12,648
New +$299K ﹤0.01% 2459
2025
Q2 		– Sell
-13,468
Closed -$154K – 2983
2025
Q1 		$154K Sell
13,468
-783,526
-98% -$12.5M ﹤0.01% 2443
2024
Q4 		$12.7M Sell
796,994
-2,847,273
-78% -$41.8M 0.02% 713
2024
Q3 		$50.5M Buy
3,644,267
+2,084,747
+134% +$28.4M 0.06% 278
2024
Q2 		$20.7M Buy
1,559,520
+578,678
+59% +$6.33M 0.03% 489
2024
Q1 		$10.5M Buy
980,842
+782,112
+394% +$7.81M 0.02% 731
2023
Q4 		$1.86M Buy
+198,730
New +$1.57M ﹤0.01% 1253
2022
Q2 		– Sell
-854,004
Closed -$11.3M – 3686
2022
Q1 		$11.3M Buy
854,004
+363,797
+74% +$4.91M 0.02% 795
2021
Q4 		$8.58M Buy
+490,207
New +$11M 0.02% 973
2021
Q2 		– Sell
-47,515
Closed -$1.98M – 2896
2021
Q1 		$1.98M Buy
47,515
+37,560
+377% +$1.63M 0.01% 1336
2020
Q4 		$306K Buy
+9,955
New +$151K ﹤0.01% 1648
2020
Q3 		– Sell
-62,116
Closed -$414K – 1794
2020
Q2 		$414K Sell
62,116
-771,314
-93% -$4.82M ﹤0.01% 1253
2020
Q1 		$4.63M Buy
833,430
+234,015
+39% +$2.15M 0.05% 405
2019
Q4 		$4.89M Buy
+599,415
New +$4.93M 0.03% 542
2015
Q2 		– Sell
-218,504
Closed -$3.92M – 984
2015
Q1 		$3.92M Buy
+218,504
New +$3.68M 0.05% 361

Other funds holding MGNI

BlackRock
BlackRock New York $5.72T AUM 30.48% 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 $95.5B AUM 28.4% 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

Marshall Wace's MGNI Position: Q1 2026 in Review

Marshall Wace increased its Magnite (MGNI) stake by 48% in Q1 2026, buying an estimated $184K and bringing the position to 42,468 shares worth $505K. The position accounts for ﹤0.01% of the portfolio, ranked #2451.

Marshall Wace first reported a position in MGNI in Q1 2015 and has held it in 17 quarters since. The position peaked at $50.5M in Q3 2024. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

  • Marshall Wace held 42,468 shares of Magnite worth $505K as of Q1 2026.
  • Marshall Wace bought 13,705 Magnite shares in Q1 2026, an estimated $184K.
  • Magnite made up ﹤0.01% of Marshall Wace's portfolio in Q1 2026, its #2451 holding.
  • Marshall Wace first reported a position in Magnite in Q1 2015 and has held it in 17 quarters since.
  • Marshall Wace's Magnite position peaked at $50.5M in Q3 2024.
  • 297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.