Squarepoint’s Magnite MGNI Stock Holding History

Squarepoint’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	$13M	Sell	1,090,400 -620,900	-36%	-$8.32M	0.02%	934
2025 Q4	$27.8M	Sell	1,711,300 -45,700	-3%	-$759K	0.03%	601
2025 Q3	$38.3M	Sell	1,757,000 -25,100	-1%	-$593K	0.04%	495
2025 Q2	$43M	Sell	1,782,100 -23,300	-1%	-$343K	0.04%	443
2025 Q1	$20.6M	Sell	1,805,400 -183,800	-9%	-$2.93M	0.03%	671
2024 Q4	$31.7M	Buy	1,989,200 +902,700	+83%	+$13.2M	0.03%	549
2024 Q3	$15M	Buy	1,086,500 +703,400	+184%	+$9.58M	0.02%	729
2024 Q2	$5.09M	Buy	383,100 +288,300	+304%	+$3.15M	0.01%	1371
2024 Q1	$1.02M	Sell	94,800 -65,000	-41%	-$649K	﹤0.01%	2577
2023 Q4	$1.49M	Buy	159,800 +94,800	+146%	+$749K	﹤0.01%	2225
2023 Q3	$490K	Buy	+65,000	New	+$701K	﹤0.01%	2820

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

Squarepoint's MGNI Position: Q1 2026 in Review

Squarepoint increased its Magnite (MGNI) stake by 562% in Q1 2026, buying an estimated $3.43M and bringing the position to 300,934 shares worth $3.58M. The position accounts for ﹤0.01% of the portfolio, ranked #1751.

Squarepoint first reported a position in MGNI in Q3 2016 and has held it in 24 quarters since. The position peaked at $11.8M in Q3 2024. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.

Squarepoint held 300,934 shares of Magnite worth $3.58M as of Q1 2026.
Squarepoint bought 255,496 Magnite shares in Q1 2026, an estimated $3.43M.
Magnite made up ﹤0.01% of Squarepoint's portfolio in Q1 2026, its #1751 holding.
Squarepoint first reported a position in Magnite in Q3 2016 and has held it in 24 quarters since.
Squarepoint's Magnite position peaked at $11.8M in Q3 2024.
297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.

Based on Squarepoint's 13F filing for Q1 2026, filed 15 May 2026.