CSS
MGNI icon

Cubist Systematic Strategies’s Magnite MGNI Stock Holding History

Cubist Systematic Strategies’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 		$481K Buy
+22,100
New +$522K ﹤0.01% 2296

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

Cubist Systematic Strategies's MGNI Position: Q3 2025 in Review

Cubist Systematic Strategies opened a new position in Magnite (MGNI) in Q3 2025: 71,251 shares worth $1.55M. The stake represents 0.01% of the portfolio and ranks #1716 among its holdings. This is a return to the name: Cubist Systematic Strategies previously reported a position in MGNI as recently as Q1 2024.

Cubist Systematic Strategies first reported a position in MGNI in Q2 2014 and has held it in 33 quarters since. The position peaked at $5.7M in Q2 2021. 316 funds tracked by Wall St. Rank hold MGNI as of Q3 2025.

  • Cubist Systematic Strategies held 71,251 shares of Magnite worth $1.55M as of Q3 2025.
  • Magnite was a new Cubist Systematic Strategies position in Q3 2025.
  • Magnite made up 0.01% of Cubist Systematic Strategies's portfolio in Q3 2025, its #1716 holding.
  • Cubist Systematic Strategies first reported a position in Magnite in Q2 2014 and has held it in 33 quarters since.
  • Cubist Systematic Strategies's Magnite position peaked at $5.7M in Q2 2021.
  • 316 funds tracked by Wall St. Rank held Magnite as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.