Weiss Asset Management’s Magnite MGNI Stock Holding History

Weiss Asset Management’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	-58,484	Closed	-$949K	–	686
2025 Q4	$949K	Buy	+58,484	New	+$971K	0.01%	422
2025 Q3	–	Sell	-59,132	Closed	-$1.43M	–	717
2025 Q2	$1.43M	Sell	59,132 -395,996	-87%	-$5.83M	0.02%	296
2025 Q1	$5.19M	Buy	455,128 +318,076	+232%	+$5.07M	0.1%	111
2024 Q4	$2.18M	Buy	+137,052	New	+$2.01M	0.04%	295
2019 Q3	–	Sell	-12,612	Closed	-$80K	–	418
2019 Q2	$80K	Sell	12,612 -8,510	-40%	-$52.3K	﹤0.01%	305
2019 Q1	$128K	Buy	+21,122	New	+$109K	0.01%	255

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

Weiss Asset Management's MGNI Position: Q1 2026 in Review

Weiss Asset Management sold out of Magnite (MGNI) in Q1 2026, closing a stake of 58,484 shares — an estimated $949K sold.

Weiss Asset Management first reported a position in MGNI in Q1 2019 and held it in 6 quarters. The position peaked at $5.19M in Q1 2025. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

Weiss Asset Management reported no remaining Magnite position as of Q1 2026 after selling out during the quarter.
Weiss Asset Management sold 58,484 Magnite shares in Q1 2026, an estimated $949K.
Weiss Asset Management first reported a position in Magnite in Q1 2019 and held it in 6 quarters.
Weiss Asset Management's Magnite position peaked at $5.19M in Q1 2025.
297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Weiss Asset Management's 13F filing for Q1 2026, filed 15 May 2026.