Magnetar Financial’s Ambarella AMBA Stock Holding History

Magnetar Financial’s Portfolio AMBA Stock Details AMBA Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$876K	Buy	17,014 +12,980	+322%	+$809K	0.01%	506
2025 Q4	$286K	Sell	4,034 -4,386	-52%	-$354K	﹤0.01%	705
2025 Q3	$695K	Buy	+8,420	New	+$611K	﹤0.01%	525
2025 Q2	–	Sell	-4,013	Closed	-$202K	–	882
2025 Q1	$202K	Sell	4,013 -6,012	-60%	-$411K	﹤0.01%	671
2024 Q4	$729K	Buy	10,025 +61	+0.6%	+$3.89K	0.02%	312
2024 Q3	$562K	Sell	9,964 -2,721	-21%	-$145K	0.01%	330
2024 Q2	$684K	Buy	+12,685	New	+$630K	0.01%	308
2021 Q4	–	Sell	-1,469	Closed	-$229K	–	1362
2021 Q3	$229K	Buy	+1,469	New	+$169K	﹤0.01%	1062
2021 Q2	–	Sell	-12,746	Closed	-$1.28M	–	1191
2021 Q1	$1.28M	Buy	+12,746	New	+$1.39M	0.01%	649

Other funds holding AMBA

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Manulife (Manufacturers Life Insurance) Canada, Ontario, Canada $116B AUM 26.37% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Legal & General Group London, United Kingdom $432B AUM 29.4% 1-Year Est. Return

Magnetar Financial's AMBA Position: Q1 2026 in Review

Magnetar Financial increased its Ambarella (AMBA) stake by 322% in Q1 2026, buying an estimated $809K and bringing the position to 17,014 shares worth $876K. The position accounts for 0.01% of the portfolio, ranked #506.

Magnetar Financial first reported a position in AMBA in Q1 2021 and has held it in 9 quarters since. The position peaked at $1.28M in Q1 2021. 305 funds tracked by Wall St. Rank hold AMBA as of Q1 2026.

Magnetar Financial held 17,014 shares of Ambarella worth $876K as of Q1 2026.
Magnetar Financial bought 12,980 Ambarella shares in Q1 2026, an estimated $809K.
Ambarella made up 0.01% of Magnetar Financial's portfolio in Q1 2026, its #506 holding.
Magnetar Financial first reported a position in Ambarella in Q1 2021 and has held it in 9 quarters since.
Magnetar Financial's Ambarella position peaked at $1.28M in Q1 2021.
305 funds tracked by Wall St. Rank held Ambarella as of Q1 2026.

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