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1858 Wealth Management’s Magnite MGNI Stock Holding History

1858 Wealth Management’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
Q3 		$201K Sell
9,212
-4,858
-35% -$115K 0.14% 113
2025
Q2 		$339K Buy
14,070
+1,465
+12% +$21.6K 0.25% 70
2025
Q1 		$144K Buy
+12,605
New +$201K 0.12% 117

Other funds holding MGNI

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 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
GIM
Granahan Investment Management Waltham, Massachusetts $2.07B AUM 56.45% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

1858 Wealth Management's MGNI Position: Q3 2025 in Review

1858 Wealth Management reduced its Magnite (MGNI) stake by 35% in Q3 2025, selling an estimated $115K and leaving 9,212 shares worth $201K. The position accounts for 0.14% of the portfolio, ranked #113.

1858 Wealth Management first reported a position in MGNI in Q1 2025 and has held it in 3 quarters since. The position peaked at $339K in Q2 2025. 316 funds tracked by Wall St. Rank hold MGNI as of Q3 2025.

  • 1858 Wealth Management held 9,212 shares of Magnite worth $201K as of Q3 2025.
  • 1858 Wealth Management sold 4,858 Magnite shares in Q3 2025, an estimated $115K.
  • Magnite made up 0.14% of 1858 Wealth Management's portfolio in Q3 2025, its #113 holding.
  • 1858 Wealth Management first reported a position in Magnite in Q1 2025 and has held it in 3 quarters since.
  • 1858 Wealth Management's Magnite position peaked at $339K in Q2 2025.
  • 316 funds tracked by Wall St. Rank held Magnite as of Q3 2025.

Based on 1858 Wealth Management's 13F filing for Q3 2025, filed 14 Nov 2025.