Magnetar Financial’s Allegro MicroSystems ALGM Stock Holding History

Magnetar Financial’s Portfolio ALGM Stock Details ALGM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-31,907	Closed	-$932K	–	914
2025 Q3	$932K	Buy	+31,907	New	+$1.03M	0.01%	474
2024 Q2	–	Sell	-10,210	Closed	-$275K	–	500
2024 Q1	$275K	Sell	10,210 -609	-6%	-$17.6K	0.01%	332
2023 Q4	$327K	Buy	+10,819	New	+$309K	0.01%	320
2023 Q3	–	Sell	-12,269	Closed	-$554K	–	443
2023 Q2	$554K	Buy	+12,269	New	+$497K	0.01%	332
2021 Q2	–	Sell	-15,170	Closed	-$385K	–	1187
2021 Q1	$385K	Buy	+15,170	New	+$434K	﹤0.01%	878

Other funds holding ALGM

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

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

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

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

ClearBridge Investments New York $121B AUM 27.52% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Magnetar Financial's ALGM Position: Q4 2025 in Review

Magnetar Financial sold out of Allegro MicroSystems (ALGM) in Q4 2025, closing a stake of 31,907 shares — an estimated $932K sold.

Magnetar Financial first reported a position in ALGM in Q1 2021 and held it in 5 quarters. The position peaked at $932K in Q3 2025. 293 funds tracked by Wall St. Rank hold ALGM as of Q4 2025.

Magnetar Financial reported no remaining Allegro MicroSystems position as of Q4 2025 after selling out during the quarter.
Magnetar Financial sold 31,907 Allegro MicroSystems shares in Q4 2025, an estimated $932K.
Magnetar Financial first reported a position in Allegro MicroSystems in Q1 2021 and held it in 5 quarters.
Magnetar Financial's Allegro MicroSystems position peaked at $932K in Q3 2025.
293 funds tracked by Wall St. Rank held Allegro MicroSystems as of Q4 2025.

Based on Magnetar Financial's 13F filing for Q4 2025, filed 17 Feb 2026.