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Sierra Summit Advisors’s Magnite MGNI Stock Holding History

Sierra Summit Advisors’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
-34,632
Closed -$754K – 198
2025
Q3 		$754K Buy
+34,632
New +$818K 0.12% 133

Other funds holding MGNI

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 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
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Sierra Summit Advisors's MGNI Position: Q4 2025 in Review

Sierra Summit Advisors sold out of Magnite (MGNI) in Q4 2025, closing a stake of 34,632 shares — an estimated $754K sold.

Sierra Summit Advisors first reported a position in MGNI in Q3 2025 and held it in 1 quarter. The position peaked at $754K in Q3 2025. 304 funds tracked by Wall St. Rank hold MGNI as of Q4 2025.

  • Sierra Summit Advisors reported no remaining Magnite position as of Q4 2025 after selling out during the quarter.
  • Sierra Summit Advisors sold 34,632 Magnite shares in Q4 2025, an estimated $754K.
  • Sierra Summit Advisors first reported a position in Magnite in Q3 2025 and held it in 1 quarter.
  • Sierra Summit Advisors's Magnite position peaked at $754K in Q3 2025.
  • 304 funds tracked by Wall St. Rank held Magnite as of Q4 2025.

Based on Sierra Summit Advisors's 13F filing for Q4 2025, filed 6 Feb 2026.