Ambarella Ownership | Who Owns Ambarella?

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Ambarella Ownership Summary

Ambarella is owned by 20.59% institutional investors, 4.89% insiders, and 74.52% retail investors. Vanguard group is the largest institutional shareholder, holding 12.19% of AMBA shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.96% of its assets in Ambarella shares.

AMBA Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Ambarella	20.59%	4.89%	74.52%
Sector	Technology Stocks	50.69%	12.56%	36.75%
Idea	Semiconductor Stocks List	114.42%	7.19%	-21.61%
Idea	Self Driving Car Stocks List	35.35%	6.73%	57.92%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	5.17M	12.19%	$426.52M
Blackrock funding, inc. /de	3.92M	9.25%	$323.66M
Blackrock	3.47M	8.52%	$187.38M
State street	1.68M	3.97%	$138.70M
Jericho capital asset management	1.21M	2.86%	$100.13M
Fuller & thaler asset management	1.11M	2.61%	$91.41M
Geode capital management	985.02K	2.32%	$81.30M
Morgan stanley	958.51K	2.26%	$79.10M
Millennium management	910.17K	2.18%	$45.81M
Manufacturers life insurance company, the	853.22K	2.01%	$70.41M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
S squared	153.55K	4.82%	$12.67M
Kodai capital management lp	778.55K	2.32%	$56.63M
Oberweis asset management inc/	611.36K	1.93%	$50.45M
Sg capital management	232.71K	1.71%	$19.20M
Tributary capital management	423.79K	1.66%	$34.97M
Tradelink capital	2.63K	1.56%	$217.00K
Sws partners	76.42K	1.54%	$6.31M
Collar capital management	20.70K	1.20%	$1.71M
Westerly capital management	45.00K	1.16%	$3.71M
Aigh capital management	50.00K	1.16%	$4.13M

Top Buyers

Holder	Shares	% Assets	Change
Ubs group	821.75K	0.01%	650.31K
Barclays	775.11K	0.01%	425.55K
Balyasny asset management	459.56K	0.05%	413.36K
Driehaus capital management	381.13K	0.23%	381.13K
Axa investment managers	332.58K	0.07%	332.58K

Top Sellers

Holder	Shares	% Assets	Change
Macquarie group	-	-	-1.18M
Manufacturers life insurance company, the	853.22K	0.06%	-518.30K
Millennium management	910.17K	0.02%	-484.02K
Woodline partners lp	-	-	-441.38K
Axa	-	-	-356.99K

New Positions

Holder	Shares	% Assets	Change	Value
Driehaus capital management	381.13K	0.23%	381.13K	$31.45M
Axa investment managers	332.58K	0.07%	332.58K	$27.44M
Readystate asset management lp	72.94K	0.26%	72.94K	$6.02M
G2 investment partners management	66.00K	1.10%	66.00K	$5.45M
Aigh capital management	50.00K	1.16%	50.00K	$4.13M

Sold Out

Holder	Change
Stephens consulting	-1.00
Natixis	-1.00
Southstate	-3.00
Riggs asset managment	-5.00
Td capital management	-7.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	129	-59.31%	8,725,551	-73.23%	20	0.35%	65	-60.12%	38	-63.46%
Jun 30, 2025	322	2.22%	35,040,309	-0.42%	82	1.14%	163	-3.55%	106	10.42%
Mar 31, 2025	10	-96.91%	1,154,851	-96.58%	2	0.04%	2	-98.76%	2	-97.98%
Dec 31, 2024	319	11.15%	33,697,450	2.34%	81	1.28%	155	13.97%	100	9.89%
Sep 30, 2024	283	-0.35%	32,908,102	-3.05%	80	1.17%	133	1.53%	92	-5.15%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	1.26M	2.96%	-26.85K
Vanguard US Total Market Shares ETF	1.24M	2.95%	1.28K
Vanguard Small Cap Index	978.11K	2.31%	-6.36K
iShares Russell 2000 ETF	980.41K	2.30%	-
Vanguard Information Technology ETF	961.76K	2.27%	9.79K
FullerThaler Behavioral Small-Cap Growth	673.74K	1.59%	32.23K
FullerThaler Behavioral Sm-Cp Gr R6	655.40K	1.54%	18.00K
SPDR® S&P Semiconductor ETF	647.44K	1.52%	-
Vanguard Small Cap Growth Index Inv	552.60K	1.30%	-226.00
JHancock Small Cap Core NAV	457.99K	1.07%	-61.89K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 13, 2025	Ju Chi-Hong	Senior VP, Systems & GM, Asia	Sell	$411.09K
Oct 14, 2025	Ju Chi-Hong	Senior VP, Systems & GM, Asia	Sell	$498.39K
Oct 06, 2025	Schwarting Elizabeth M	-	Sell	$227.44K
Sep 17, 2025	Young John Alexander	CFO	Sell	$203.82K
Sep 17, 2025	Lee Chan W	Chief Operating Officer	Sell	$154.65K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	3
2025 Q3	-	6
2025 Q2	-	7
2025 Q1	-	24
2024 Q4	-	15

AMBA Ownership FAQ

Who owns the most shares of Ambarella?

Ambarella’s largest shareholders are Vanguard group (5.17M shares, 12.19%), Blackrock funding, inc. /de (3.92M shares, 9.25%), and Blackrock (3.47M shares, 8.52%). Together, they hold 29.97% of Ambarella’s total shares outstanding.

Does Blackrock own Ambarella?

Yes, BlackRock owns 8.52% of Ambarella, totaling 3.47M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 187.38M$. In the last quarter, BlackRock increased its holdings by 33.73K shares, a 0.98% change.

Who is Ambarella’s biggest shareholder by percentage of total assets invested?

S squared is Ambarella’s biggest shareholder by percentage of total assets invested, with 4.82% of its assets in 153.55K Ambarella shares, valued at 12.67M$.

Who is the top mutual fund holder of Ambarella shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Ambarella shares, with 2.96% of its total shares outstanding invested in 1.26M Ambarella shares.

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