Castleark Management’s Ambarella AMBA Stock Holding History

Castleark Management’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
2025 Q1	–	Sell	-31,960	Closed	-$2.32M	–	285
2024 Q4	$2.32M	Buy	+31,960	New	+$2.04M	0.08%	180
2023 Q2	–	Sell	-36,340	Closed	-$2.81M	–	279
2023 Q1	$2.81M	Sell	36,340 -1,600	-4%	-$137K	0.14%	146
2022 Q4	$3.12M	Buy	+37,940	New	+$2.53M	0.16%	136
2022 Q2	–	Sell	-19,060	Closed	-$2M	–	308
2022 Q1	$2M	Sell	19,060 -17,410	-48%	-$2.22M	0.09%	192
2021 Q4	$7.4M	Buy	+36,470	New	+$6.76M	0.27%	88
2021 Q3	–	Sell	-23,270	Closed	-$2.48M	–	329
2021 Q2	$2.48M	Sell	23,270 -79,760	-77%	-$7.9M	0.08%	183
2021 Q1	$10.3M	Buy	103,030 +69,510	+207%	+$7.57M	0.37%	82
2020 Q4	$3.08M	Buy	+33,520	New	+$2.35M	0.12%	161

Other funds holding AMBA

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

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

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

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

UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return

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

Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

KCM

Kodai Capital Management Chicago, Illinois $2.53B AUM 13.55% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Castleark Management's AMBA Position: Q1 2025 in Review

Castleark Management sold out of Ambarella (AMBA) in Q1 2025, closing a stake of 31,960 shares — an estimated $2.32M sold.

Castleark Management first reported a position in AMBA in Q4 2020 and held it in 8 quarters. The position peaked at $10.3M in Q1 2021. 297 funds tracked by Wall St. Rank hold AMBA as of Q1 2025.

Castleark Management reported no remaining Ambarella position as of Q1 2025 after selling out during the quarter.
Castleark Management sold 31,960 Ambarella shares in Q1 2025, an estimated $2.32M.
Castleark Management first reported a position in Ambarella in Q4 2020 and held it in 8 quarters.
Castleark Management's Ambarella position peaked at $10.3M in Q1 2021.
297 funds tracked by Wall St. Rank held Ambarella as of Q1 2025.

Based on Castleark Management's 13F filing for Q1 2025, filed 15 May 2025.