D.E. Shaw & Co
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D.E. Shaw & Co’s Magnite MGNI Stock Holding History

D.E. Shaw & Co’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
2025
Q4 		– Sell
-14,800
Closed -$322K – 4854
2025
Q3 		$322K Buy
+14,800
New +$349K ﹤0.01% 4073
2022
Q1 		– Sell
-75,800
Closed -$1.33M – 5793
2021
Q4 		$1.33M Buy
+75,800
New +$1.71M ﹤0.01% 3707
2021
Q3 		– Sell
-60,000
Closed -$2.03M – 5116
2021
Q2 		$2.03M Sell
60,000
-385,000
-87% -$13M ﹤0.01% 2927
2021
Q1 		$18.5M Buy
+445,000
New +$19.3M 0.02% 974

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

D.E. Shaw & Co's MGNI Position: Q2 2026 in Review

D.E. Shaw & Co opened a new position in Magnite (MGNI) in Q2 2026: 35,719 shares worth $678K. The stake represents ﹤0.01% of the portfolio and ranks #4015 among its holdings. This is a return to the name: D.E. Shaw & Co previously reported a position in MGNI as recently as Q3 2025.

D.E. Shaw & Co first reported a position in MGNI in Q2 2014 and has held it in 31 quarters since. The position peaked at $9.12M in Q1 2019. 311 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • D.E. Shaw & Co held 35,719 shares of Magnite worth $678K as of Q2 2026.
  • Magnite was a new D.E. Shaw & Co position in Q2 2026.
  • Magnite made up ﹤0.01% of D.E. Shaw & Co's portfolio in Q2 2026, its #4015 holding.
  • D.E. Shaw & Co first reported a position in Magnite in Q2 2014 and has held it in 31 quarters since.
  • D.E. Shaw & Co's Magnite position peaked at $9.12M in Q1 2019.
  • 311 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.