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Two Sigma Securities’s Magnite MGNI Stock Holding History

Two Sigma Securities’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
2021
Q3 		– Sell
-8,300
Closed -$281K – 1786
2021
Q2 		$281K Buy
+8,300
New +$281K 0.01% 1033
2021
Q1 		– Sell
-9,900
Closed -$304K – 1406
2020
Q4 		$304K Buy
+9,900
New +$150K 0.01% 1038

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

Two Sigma Securities's MGNI Position: Q2 2026 in Review

Two Sigma Securities increased its Magnite (MGNI) stake by 75% in Q2 2026, buying an estimated $130K and bringing the position to 21,097 shares worth $400K. The position accounts for 0.03% of the portfolio, ranked #698.

Two Sigma Securities first reported a position in MGNI in Q1 2017 and has held it in 8 quarters since. The position peaked at $488K in Q4 2022. 311 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

  • Two Sigma Securities held 21,097 shares of Magnite worth $400K as of Q2 2026.
  • Two Sigma Securities bought 9,066 Magnite shares in Q2 2026, an estimated $130K.
  • Magnite made up 0.03% of Two Sigma Securities's portfolio in Q2 2026, its #698 holding.
  • Two Sigma Securities first reported a position in Magnite in Q1 2017 and has held it in 8 quarters since.
  • Two Sigma Securities's Magnite position peaked at $488K in Q4 2022.
  • 311 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Two Sigma Securities's 13F filing for Q2 2026, filed 14 Aug 2026.