PEAK6’s Magnite MGNI Stock Holding History

PEAK6’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 Q2	–	Sell	-103,167	Closed	-$1.52M	–	3310
2025 Q1	$1.18M	Buy	+103,167	New	+$1.64M	﹤0.01%	1679

Other funds holding MGNI

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

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return

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

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

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

Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

PEAK6's MGNI Position: Q2 2025 in Review

PEAK6 sold out of Magnite (MGNI) in Q2 2025, closing a stake of 103,167 shares — an estimated $1.52M sold.

PEAK6 first reported a position in MGNI in Q1 2025 and held it in 1 quarter. The position peaked at $1.18M in Q1 2025. 286 funds tracked by Wall St. Rank hold MGNI as of Q2 2025.

PEAK6 reported no remaining Magnite position as of Q2 2025 after selling out during the quarter.
PEAK6 sold 103,167 Magnite shares in Q2 2025, an estimated $1.52M.
PEAK6 first reported a position in Magnite in Q1 2025 and held it in 1 quarter.
PEAK6's Magnite position peaked at $1.18M in Q1 2025.
286 funds tracked by Wall St. Rank held Magnite as of Q2 2025.

Based on PEAK6's 13F filing for Q2 2025, filed 14 Aug 2025.