Steve Schonfeld’s Magnite MGNI Stock Holding History

Steve Schonfeld’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 Q2	$10.7M	Sell	562,195 -1,042,846	-65%	-$14.9M	0.04%	399
2026 Q1	$19.1M	Buy	1,605,041 +825,360	+106%	+$11.1M	0.13%	165
2025 Q4	$12.7M	Buy	+779,681	New	+$12.9M	0.06%	291
2025 Q3	–	Sell	-1,900,598	Closed	-$45.8M	–	2422
2025 Q2	$45.8M	Buy	+1,900,598	New	+$28M	0.31%	52
2024 Q2	–	Sell	-116,800	Closed	-$1.26M	–	2412
2024 Q1	$1.26M	Buy	+116,800	New	+$1.17M	0.01%	1146
2023 Q3	–	Sell	-13,200	Closed	-$180K	–	2089
2023 Q2	$180K	Buy	+13,200	New	+$147K	﹤0.01%	1600
2023 Q1	–	Sell	-145,361	Closed	-$1.54M	–	2414
2022 Q4	$1.54M	Buy	145,361 +130,661	+889%	+$1.19M	0.01%	938
2022 Q3	$97K	Buy	+14,700	New	+$118K	﹤0.01%	2565
2020 Q1	–	Sell	-33,888	Closed	-$277K	–	1361
2019 Q4	$277K	Buy	+33,888	New	+$279K	0.01%	1015

Other funds holding MGNI

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return

Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return

Steve Schonfeld's MGNI Position: Q2 2026 in Review

Steve Schonfeld reduced its Magnite (MGNI) stake by 65% in Q2 2026, selling an estimated $14.9M and leaving 562,195 shares worth $10.7M. The position accounts for 0.04% of the portfolio, ranked #399.

Steve Schonfeld first reported a position in MGNI in Q4 2019 and has held it in 9 quarters since. The position peaked at $45.8M in Q2 2025. 309 funds tracked by Wall St. Rank hold MGNI as of Q2 2026.

Steve Schonfeld held 562,195 shares of Magnite worth $10.7M as of Q2 2026.
Steve Schonfeld sold 1,042,846 Magnite shares in Q2 2026, an estimated $14.9M.
Magnite made up 0.04% of Steve Schonfeld's portfolio in Q2 2026, its #399 holding.
Steve Schonfeld first reported a position in Magnite in Q4 2019 and has held it in 9 quarters since.
Steve Schonfeld's Magnite position peaked at $45.8M in Q2 2025.
309 funds tracked by Wall St. Rank held Magnite as of Q2 2026.

Based on Schonfeld Strategic Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.