Roubaix Capital’s Magnite MGNI Stock Holding History

Roubaix Capital’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	–	Sell	-260,735	Closed	-$6.29M	–	63
2025 Q2	$6.29M	Buy	+260,735	New	+$3.84M	3.02%	10

Other funds holding MGNI

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

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 Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Roubaix Capital's MGNI Position: Q3 2025 in Review

Roubaix Capital sold out of Magnite (MGNI) in Q3 2025, closing a stake of 260,735 shares — an estimated $6.29M sold.

Roubaix Capital first reported a position in MGNI in Q2 2025 and held it in 1 quarter. The position peaked at $6.29M in Q2 2025. 316 funds tracked by Wall St. Rank hold MGNI as of Q3 2025.

Roubaix Capital reported no remaining Magnite position as of Q3 2025 after selling out during the quarter.
Roubaix Capital sold 260,735 Magnite shares in Q3 2025, an estimated $6.29M.
Roubaix Capital first reported a position in Magnite in Q2 2025 and held it in 1 quarter.
Roubaix Capital's Magnite position peaked at $6.29M in Q2 2025.
316 funds tracked by Wall St. Rank held Magnite as of Q3 2025.

Based on Roubaix Capital's 13F filing for Q3 2025, filed 12 Nov 2025.