MF
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Magnetar Financial’s Magnite MGNI Stock Holding History

Magnetar Financial’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 		– Sell
-96,163
Closed -$1.56M – 1291
2025
Q4 		$1.56M Buy
96,163
+80,974
+533% +$1.34M 0.02% 381
2025
Q3 		$331K Buy
+15,189
New +$359K ﹤0.01% 684

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

Magnetar Financial's MGNI Position: Q1 2026 in Review

Magnetar Financial sold out of Magnite (MGNI) in Q1 2026, closing a stake of 96,163 shares — an estimated $1.56M sold.

Magnetar Financial first reported a position in MGNI in Q3 2025 and held it in 2 quarters. The position peaked at $1.56M in Q4 2025. 296 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

  • Magnetar Financial reported no remaining Magnite position as of Q1 2026 after selling out during the quarter.
  • Magnetar Financial sold 96,163 Magnite shares in Q1 2026, an estimated $1.56M.
  • Magnetar Financial first reported a position in Magnite in Q3 2025 and held it in 2 quarters.
  • Magnetar Financial's Magnite position peaked at $1.56M in Q4 2025.
  • 296 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.