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 Q2	–	Sell	-17,014	Closed	-$876K	–	1154
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 $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Manulife (Manufacturers Life Insurance) Canada, Ontario, Canada $128B AUM 35.83% 1-Year Est. Return

Legal & General Group London, United Kingdom $480B AUM 42.84% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

MMH

Menora Mivtachim Holdings Ramat Gan, Israel $25.6B AUM 50.04% 1-Year Est. Return

SIMG

Stephens Investment Management Group Houston, Texas $9.33B AUM 56.1% 1-Year Est. Return

Magnetar Financial's AMBA Position: Q2 2026 in Review

Magnetar Financial sold out of Ambarella (AMBA) in Q2 2026, closing a stake of 17,014 shares — an estimated $876K sold.

Magnetar Financial first reported a position in AMBA in Q1 2021 and held it in 9 quarters. The position peaked at $1.28M in Q1 2021. 342 funds tracked by Wall St. Rank hold AMBA as of Q2 2026.

Magnetar Financial reported no remaining Ambarella position as of Q2 2026 after selling out during the quarter.
Magnetar Financial sold 17,014 Ambarella shares in Q2 2026, an estimated $876K.
Magnetar Financial first reported a position in Ambarella in Q1 2021 and held it in 9 quarters.
Magnetar Financial's Ambarella position peaked at $1.28M in Q1 2021.
342 funds tracked by Wall St. Rank held Ambarella as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.