Magnetar Financial’s Affiliated Managers Group AMG Stock Holding History

Magnetar Financial’s Portfolio AMG Stock Details AMG Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.14M	Buy	4,110 +3,198	+351%	+$964K	0.01%	449
2025 Q4	$263K	Buy	+912	New	+$236K	﹤0.01%	728
2025 Q3	–	Sell	-1,448	Closed	-$285K	–	879
2025 Q2	$285K	Buy	+1,448	New	+$251K	﹤0.01%	715
2024 Q4	–	Sell	-1,374	Closed	-$244K	–	606
2024 Q3	$244K	Buy	+1,374	New	+$233K	0.01%	437
2023 Q3	–	Sell	-9,713	Closed	-$1.46M	–	446
2023 Q2	$1.46M	Sell	9,713 -2,801	-22%	-$401K	0.03%	245
2023 Q1	$1.78M	Buy	+12,514	New	+$1.98M	0.03%	313
2022 Q4	–	Sell	-10,587	Closed	-$1.18M	–	779
2022 Q3	$1.18M	Buy	+10,587	New	+$1.33M	0.02%	689
2021 Q3	–	Sell	-1,928	Closed	-$297	–	1304
2021 Q2	$297	Buy	+1,928	New	+$308K	﹤0.01%	1034
2018 Q4	–	Sell	-3,598	Closed	-$492K	–	282
2018 Q3	$492K	Buy	+3,598	New	+$531K	0.01%	202

Other funds holding AMG

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

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Ariel Investments Chicago, Illinois $8.93B AUM 29.58% 1-Year Est. Return

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

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 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

Magnetar Financial's AMG Position: Q1 2026 in Review

Magnetar Financial increased its Affiliated Managers Group (AMG) stake by 351% in Q1 2026, buying an estimated $964K and bringing the position to 4,110 shares worth $1.14M. The position accounts for 0.01% of the portfolio, ranked #449.

Magnetar Financial first reported a position in AMG in Q3 2018 and has held it in 9 quarters since. The position peaked at $1.78M in Q1 2023. 543 funds tracked by Wall St. Rank hold AMG as of Q1 2026.

Magnetar Financial held 4,110 shares of Affiliated Managers Group worth $1.14M as of Q1 2026.
Magnetar Financial bought 3,198 Affiliated Managers Group shares in Q1 2026, an estimated $964K.
Affiliated Managers Group made up 0.01% of Magnetar Financial's portfolio in Q1 2026, its #449 holding.
Magnetar Financial first reported a position in Affiliated Managers Group in Q3 2018 and has held it in 9 quarters since.
Magnetar Financial's Affiliated Managers Group position peaked at $1.78M in Q1 2023.
543 funds tracked by Wall St. Rank held Affiliated Managers Group as of Q1 2026.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.