Oberweis Asset Management’s Ambarella AMBA Stock Holding History

Oberweis Asset 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
2026 Q1	$15.2M	Sell	295,185 -322,675	-52%	-$20.1M	0.45%	90
2025 Q4	$43.8M	Buy	617,860 +6,500	+1%	+$525K	1.6%	5
2025 Q3	$50.4M	Buy	611,360 +38,000	+7%	+$2.76M	1.93%	4
2025 Q2	$37.9M	Buy	573,360 +4,535	+0.8%	+$240K	1.65%	7
2025 Q1	$28.6M	Buy	568,825 +386,025	+211%	+$26.4M	1.43%	6
2024 Q4	$13.3M	Buy	182,800 +20,800	+13%	+$1.33M	0.63%	67
2024 Q3	$9.14M	Buy	+162,000	New	+$8.62M	0.47%	85
2015 Q1	–	Sell	-21,611	Closed	-$1.1M	–	171
2014 Q4	$1.1M	Sell	21,611 -36,789	-63%	-$1.72M	0.33%	56
2014 Q3	$2.55M	Sell	58,400 -17,300	-23%	-$573K	0.7%	40
2014 Q2	$2.36M	Sell	75,700 -16,700	-18%	-$441K	0.58%	46
2014 Q1	$2.47M	Hold	92,400	–	–	0.52%	46
2013 Q4	$3.13M	Sell	92,400 -12,500	-12%	-$287K	0.76%	40
2013 Q3	$2.05M	Buy	104,900 +54,800	+109%	+$932K	0.58%	39
2013 Q2	$843K	Buy	+50,100	New	+$761K	0.24%	80

Other funds holding AMBA

BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

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

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Manulife (Manufacturers Life Insurance)

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

Millennium Management

Millennium Management New York $134B AUM 35.51% 1-Year Est. Return

Geode Capital Management

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

T. Rowe Price Associates

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

Citadel Advisors

Citadel Advisors Miami, Florida $141B AUM 30.34% 1-Year Est. Return

Legal & General Group

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