Squarepoint
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Squarepoint’s Magnite MGNI Stock Holding History

Squarepoint’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
-12,600
Closed -$204K – 4686
2025
Q4 		$204K Sell
12,600
-7,800
-38% -$129K ﹤0.01% 3856
2025
Q3 		$444K Sell
20,400
-149,100
-88% -$3.52M ﹤0.01% 3343
2025
Q2 		$4.09M Sell
169,500
-262,500
-61% -$3.87M ﹤0.01% 1599
2025
Q1 		$4.93M Sell
432,000
-450,000
-51% -$7.17M 0.01% 1431
2024
Q4 		$14M Buy
882,000
+811,900
+1,158% +$11.9M 0.01% 952
2024
Q3 		$971K Sell
70,100
-88,700
-56% -$1.21M ﹤0.01% 2628
2024
Q2 		$2.11M Sell
158,800
-391,600
-71% -$4.28M ﹤0.01% 2020
2024
Q1 		$5.92M Buy
550,400
+353,100
+179% +$3.53M 0.01% 1336
2023
Q4 		$1.84M Buy
197,300
+66,600
+51% +$526K ﹤0.01% 2057
2023
Q3 		$985K Buy
+130,700
New +$1.41M ﹤0.01% 2333

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

Squarepoint's MGNI Position: Q2 2026 in Review

Squarepoint reduced its Magnite (MGNI) stake by 23% in Q2 2026, selling an estimated $1.01M and leaving 230,234 shares worth $4.37M. The position accounts for ﹤0.01% of the portfolio, ranked #1697.

Squarepoint first reported a position in MGNI in Q3 2016 and has held it in 25 quarters since. The position peaked at $11.8M in Q3 2024. 311 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • Squarepoint held 230,234 shares of Magnite worth $4.37M as of Q2 2026.
  • Squarepoint sold 70,700 Magnite shares in Q2 2026, an estimated $1.01M.
  • Magnite made up ﹤0.01% of Squarepoint's portfolio in Q2 2026, its #1697 holding.
  • Squarepoint first reported a position in Magnite in Q3 2016 and has held it in 25 quarters since.
  • Squarepoint's Magnite position peaked at $11.8M in Q3 2024.
  • 311 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Squarepoint's 13F filing for Q2 2026, filed 14 Aug 2026.