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Rossby Financial’s Magnite MGNI Stock Holding History

Rossby 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 		$5.89K Hold
500
– – ﹤0.01% 1446
2025
Q4 		$8.12K Hold
500
– – ﹤0.01% 992
2025
Q3 		$10.2K Buy
+500
New +$11.8K ﹤0.01% 851

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

Rossby Financial's MGNI Position: Q1 2026 in Review

Rossby Financial held its Magnite (MGNI) position steady in Q1 2026 at 500 shares worth $5.89K. The position accounts for ﹤0.01% of the portfolio, ranked #1446.

Rossby Financial first reported a position in MGNI in Q3 2025 and has held it in 3 quarters since. The position peaked at $10.2K in Q3 2025. 296 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

  • Rossby Financial held 500 shares of Magnite worth $5.89K as of Q1 2026.
  • Rossby Financial left its Magnite share count unchanged in Q1 2026.
  • Magnite made up ﹤0.01% of Rossby Financial's portfolio in Q1 2026, its #1446 holding.
  • Rossby Financial first reported a position in Magnite in Q3 2025 and has held it in 3 quarters since.
  • Rossby Financial's Magnite position peaked at $10.2K in Q3 2025.
  • 296 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Rossby Financial's 13F filing for Q1 2026, filed 11 May 2026.