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Winton Group’s Magnite MGNI Stock Holding History

Winton Group’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 		$2.31M Buy
+121,900
New +$1.75M 0.07% 273
2019
Q3 		– Sell
-22,484
Closed -$143K – 1621
2019
Q2 		$143K Buy
+22,484
New +$138K ﹤0.01% 1057

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

Winton Group's MGNI Position: Q2 2026 in Review

Winton Group opened a new position in Magnite (MGNI) in Q2 2026: 121,900 shares worth $2.31M. The stake represents 0.07% of the portfolio and ranks #273 among its holdings. This is a return to the name: Winton Group previously reported a position in MGNI as recently as Q2 2019.

Winton Group first reported a position in MGNI in Q2 2019 and has held it in 2 quarters since. 311 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • Winton Group held 121,900 shares of Magnite worth $2.31M as of Q2 2026.
  • Magnite was a new Winton Group position in Q2 2026.
  • Magnite made up 0.07% of Winton Group's portfolio in Q2 2026, its #273 holding.
  • Winton Group first reported a position in Magnite in Q2 2019 and has held it in 2 quarters since.
  • 311 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Winton Group's 13F filing for Q2 2026, filed 7 Aug 2026.