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David Shaw’s Magnite MGNI Stock Holding History

David Shaw’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

David Shaw's MGNI Position: Q2 2026 in Review

David Shaw 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: David Shaw previously reported a position in MGNI as recently as Q3 2025.

David Shaw 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. 309 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • David Shaw held 35,719 shares of Magnite worth $678K as of Q2 2026.
  • Magnite was a new David Shaw position in Q2 2026.
  • Magnite made up ﹤0.01% of David Shaw's portfolio in Q2 2026, its #4015 holding.
  • David Shaw first reported a position in Magnite in Q2 2014 and has held it in 31 quarters since.
  • David Shaw's Magnite position peaked at $9.12M in Q1 2019.
  • 309 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.