Ambarella (AMBA) Stock: Insider Trades, Congress & Funds

Smart money at a glance

Filings to Oct 27, 2026

Net selling: insiders sold $1.1M and bought $0 on the open market in 90 days (SEC Form 4). Congress: no trades disclosed in 180 days.

Company insidersSEC Form 4, last 90 days: -$1.1M netNet selling
CongressSTOCK Act, last 180 days: NoneNo trades disclosed
Big fundsSEC 13F, quarter ended Jun 30, 2026: 1 added, 4 cutMore cutting
Federal contractsUSAspending.gov, last 12 months: No awardsNone on record

Analysts

What do analysts expect?

Analyst target and ratings are on paid plans

See the 12-month consensus target and the buy/hold/sell rating split.

Unlock the full results

Questions about AMBA filings

Are insiders buying or selling Ambarella Inc (AMBA) stock?

Net selling: insiders sold $1.1M and bought $0 of AMBA stock on the open market in the 90 days to Oct 27, 2026, according to SEC Form 4 filings. $145K of the sales were made under pre-set Rule 10b5-1 trading plans. The largest was Wang, Feng-Ming (CEO), who sold $395K. The latest filing was on Sep 28, 2026.

Which members of Congress have traded AMBA recently?

None. No member of Congress disclosed a AMBA trade with a trade date in the last 180 days, according to House and Senate STOCK Act filings.

How current is this AMBA smart-money data?

This summary uses filings available on Oct 27, 2026. Insiders must report trades to the SEC within 2 business days, members of Congress have up to 45 days to disclose a trade, and funds file 13F holdings up to 45 days after each quarter ends, so the latest moves may not be public yet.

13F: filed up to 45 days late.

Smart money on AMBA

Lean short2 sources:
- Insiders
- Funds

Top traders
No tracked positions at the last update
Insiders
Lean short3 sales · $540K
2 of 3 on scheduled plans. Form 4 filings.
Politicians
No recent politician filings found
Funds
Lean short1 added · 2 trimmed
Quarter-end 13F holdings changes, not live trades. A trim is not a short.
Fin-fluencers
No recent posts found

Each bar is 100% of that source’s money. The notch marks an even split.

Lean is the direction of the latest moves. Descriptive, not advice.

Questions about AMBA filings

Are insiders buying or selling Ambarella Inc (AMBA) stock?

Which members of Congress have traded AMBA recently?

None. No member of Congress disclosed a AMBA trade with a trade date in the last 180 days, according to House and Senate STOCK Act filings.

How current is this AMBA smart-money data?

Funds

What funds are doing

12 moves · 6 mo

Buys/Adds$120.3MSells/Trims$353.1M

Buys/Adds (1)

DS
D.E. Shaw
Q2 2026 13F
$31.6M
added
Signals like this: n=13770, 53% finished lower at D15, median -0.4% vs SPY -0.4%

Sells/Trims (2)

MI
Millennium
Israel Englander · Q2 2026 13F
$74.3M
trimmed
Signals like this: n=7469, 53% finished lower at D15, median -0.5% vs SPY -0.4%
CI
Citadel
Ken Griffin · Q2 2026 13F
$48.0M
sold
Signals like this: n=2234, 53% finished lower at D15, median -0.5% vs SPY -0.4%

5 more moves

Pro opens all of them for $16.50/month, paid yearly.

Unlock all 5 moves

Unlock everything for $29/month

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Reported Aug 27, 2026

Earnings came in 13.3% below what analysts expected.

Documents

Quarterly report10-Q Annual report10-K Every filing

Last report

Aug 27, 2026

Period ending

Jul 31, 2026

Earnings per share

-$0.34-13.33% miss

-$0.30 expected

Revenue

$108.1M

SEC filing

Next report

Estimated report: Nov 24, 2026, in 28 days

Previous reports

Period ending	Reported	EPS / estimate	EPS surprise	Revenue / income	Surprise
Jul 31, 2026	Aug 27, 2026	-$0.34 / -$0.30Alpha Vantage	-13.33% miss	$108.1M No estimateSEC filing	Unavailable
Apr 30, 2026	May 28, 2026	-$0.39 / -$0.39Alpha Vantage	+0.00% in line	$100.4M No estimateSEC filing	Unavailable
Jan 31, 2026	Feb 26, 2026	-$0.35 / -$0.49Alpha Vantage	+28.57% beat	$390.7M No estimateYear ended Jan 31, 2026 · SEC filing	Unavailable
Oct 31, 2025	Nov 25, 2025	$0.27 / $0.21Alpha Vantage	+28.57% beat	$108.5M No estimateSEC filing	Unavailable
Jul 31, 2025	Aug 28, 2025	$0.15 / $0.05Alpha Vantage	+$0.10 beat	$95.5M No estimateSEC filing	Unavailable
Apr 30, 2025	May 29, 2025	$0.07 / $0.04Alpha Vantage	+$0.03 beat	$85.9M No estimateSEC filing	Unavailable
Jan 31, 2025	Feb 26, 2025	$0.11 / -$0.02Alpha Vantage	+$0.13 beat	$284.9M No estimateYear ended Jan 31, 2025 · SEC filing	Unavailable
Oct 31, 2024	Nov 26, 2024	$0.11 / $0.04Alpha Vantage	+$0.07 beat	$82.7M No estimateSEC filing	Unavailable

EPS uses Yahoo Finance where available, then Alpha Vantage or verified release comparisons. Revenue and income use company releases, SEC filings, Alpha Vantage or Yahoo Finance. Non-USD revenue carries its currency code. Comparisons require a paired release estimate.

52-wk high: $96.69
52-wk low: $48.30
Prev close: $66.82
Mkt cap: $2.94B
ROE: -9.4%
Fwd P/E: 80.0x
Beta: 2.38
P/S: 7.0x
P/B: 4.6x
Profit margin: -13.5%
Op margin: -7.5%

Fundamentals

Is the business strong?

This company is not yet profitable.

Net margin: -13.5%
Forward P/E: 80.00
Market cap: $2.9B

Valuation

P/S7.03
P/B4.55

Quality

Operating margin-7.5%
ROE-9.4%
ROA-5.2%

Growth

Beta2.38

Technicals

Price structure

This stock is under pressure.

Trend

Under pressure

35 / 100

RSI 14

48balanced

20D volatility

53%annualized

52-week range

$66.82

$48.30$96.69

20D support

$59.12recent floor

20D resistance

$71.50recent ceiling

Returns

5D +6.5%20D -2.7%60D -22.3%

Price vs moving averages

SMA20 +1.8%SMA50 -1.1%SMA200 -1.0%

Volume pace

0.63xvs prior 20D

Smart money at a glance

Filings to Oct 27, 2026

Net selling: insiders sold $1.1M and bought $0 on the open market in 90 days (SEC Form 4). Congress: no trades disclosed in 180 days.

Company insidersSEC Form 4, last 90 days: -$1.1M netNet selling
CongressSTOCK Act, last 180 days: NoneNo trades disclosed
Big fundsSEC 13F, quarter ended Jun 30, 2026: 1 added, 4 cutMore cutting
Federal contractsUSAspending.gov, last 12 months: No awardsNone on record

Analysts

What do analysts expect?

Analyst target and ratings are on paid plans

See the 12-month consensus target and the buy/hold/sell rating split.

Unlock the full results

Questions about AMBA filings

Are insiders buying or selling Ambarella Inc (AMBA) stock?

Which members of Congress have traded AMBA recently?

None. No member of Congress disclosed a AMBA trade with a trade date in the last 180 days, according to House and Senate STOCK Act filings.

How current is this AMBA smart-money data?

13F: filed up to 45 days late.

Smart money on AMBA

Lean short2 sources:
- Insiders
- Funds

Top traders
No tracked positions at the last update
Insiders
Lean short3 sales · $540K
2 of 3 on scheduled plans. Form 4 filings.
Politicians
No recent politician filings found
Funds
Lean short1 added · 2 trimmed
Quarter-end 13F holdings changes, not live trades. A trim is not a short.
Fin-fluencers
No recent posts found

Each bar is 100% of that source’s money. The notch marks an even split.

Lean is the direction of the latest moves. Descriptive, not advice.

Questions about AMBA filings

Are insiders buying or selling Ambarella Inc (AMBA) stock?

Which members of Congress have traded AMBA recently?

None. No member of Congress disclosed a AMBA trade with a trade date in the last 180 days, according to House and Senate STOCK Act filings.

How current is this AMBA smart-money data?

Funds

What funds are doing

12 moves · 6 mo

Buys/Adds$120.3MSells/Trims$353.1M

Buys/Adds (1)

DS
D.E. Shaw
Q2 2026 13F
$31.6M
added
Signals like this: n=13770, 53% finished lower at D15, median -0.4% vs SPY -0.4%

Sells/Trims (2)

MI
Millennium
Israel Englander · Q2 2026 13F
$74.3M
trimmed
Signals like this: n=7469, 53% finished lower at D15, median -0.5% vs SPY -0.4%
CI
Citadel
Ken Griffin · Q2 2026 13F
$48.0M
sold
Signals like this: n=2234, 53% finished lower at D15, median -0.5% vs SPY -0.4%

5 more moves

Pro opens all of them for $16.50/month, paid yearly.

Unlock all 5 moves

Unlock everything for $29/month

Unlock for $29/month

Reported Aug 27, 2026

Earnings came in 13.3% below what analysts expected.

Documents

Quarterly report10-Q Annual report10-K Every filing

Last report

Aug 27, 2026

Period ending

Jul 31, 2026

Earnings per share

-$0.34-13.33% miss

-$0.30 expected

Revenue

$108.1M

SEC filing

Next report

Estimated report: Nov 24, 2026, in 28 days

Previous reports

Period ending	Reported	EPS / estimate	EPS surprise	Revenue / income	Surprise
Jul 31, 2026	Aug 27, 2026	-$0.34 / -$0.30Alpha Vantage	-13.33% miss	$108.1M No estimateSEC filing	Unavailable
Apr 30, 2026	May 28, 2026	-$0.39 / -$0.39Alpha Vantage	+0.00% in line	$100.4M No estimateSEC filing	Unavailable
Jan 31, 2026	Feb 26, 2026	-$0.35 / -$0.49Alpha Vantage	+28.57% beat	$390.7M No estimateYear ended Jan 31, 2026 · SEC filing	Unavailable
Oct 31, 2025	Nov 25, 2025	$0.27 / $0.21Alpha Vantage	+28.57% beat	$108.5M No estimateSEC filing	Unavailable
Jul 31, 2025	Aug 28, 2025	$0.15 / $0.05Alpha Vantage	+$0.10 beat	$95.5M No estimateSEC filing	Unavailable
Apr 30, 2025	May 29, 2025	$0.07 / $0.04Alpha Vantage	+$0.03 beat	$85.9M No estimateSEC filing	Unavailable
Jan 31, 2025	Feb 26, 2025	$0.11 / -$0.02Alpha Vantage	+$0.13 beat	$284.9M No estimateYear ended Jan 31, 2025 · SEC filing	Unavailable
Oct 31, 2024	Nov 26, 2024	$0.11 / $0.04Alpha Vantage	+$0.07 beat	$82.7M No estimateSEC filing	Unavailable

52-wk high: $96.69
52-wk low: $48.30
Prev close: $66.82
Mkt cap: $2.94B
ROE: -9.4%
Fwd P/E: 80.0x
Beta: 2.38
P/S: 7.0x
P/B: 4.6x
Profit margin: -13.5%
Op margin: -7.5%

Fundamentals

Is the business strong?

This company is not yet profitable.

Net margin: -13.5%
Forward P/E: 80.00
Market cap: $2.9B

Valuation

P/S7.03
P/B4.55

Quality

Operating margin-7.5%
ROE-9.4%
ROA-5.2%

Growth

Beta2.38

Technicals

Price structure

This stock is under pressure.

Trend

Under pressure

35 / 100

RSI 14

48balanced

20D volatility

53%annualized

52-week range

$66.82

$48.30$96.69

20D support

$59.12recent floor

20D resistance

$71.50recent ceiling

Returns

5D +6.5%20D -2.7%60D -22.3%

Price vs moving averages

SMA20 +1.8%SMA50 -1.1%SMA200 -1.0%

Volume pace

0.63xvs prior 20D

Ambarella Inc

Smart money at a glance

What do analysts expect?

Questions about AMBA filings

Smart money on AMBA

Questions about AMBA filings

What funds are doing

What insiders are doing

How top traders are positioned

Unlock everything for $29/month

Earnings came in 13.3% below what analysts expected.

Estimated report: Nov 24, 2026, in 28 days

Previous reports

Is the business strong?

Price structure

Ambarella Inc

Smart money at a glance

What do analysts expect?

Questions about AMBA filings

Smart money on AMBA

Questions about AMBA filings

What funds are doing

What insiders are doing

How top traders are positioned

Unlock everything for $29/month

Earnings came in 13.3% below what analysts expected.

Estimated report: Nov 24, 2026, in 28 days

Previous reports

Is the business strong?

Price structure

Ambarella Inc

Overview

Questions about AMBA filings

Smart money

Unlock everything for $29/month

Earnings

Financials

Technicals

Ambarella Inc

Overview

Questions about AMBA filings

Smart money

Unlock everything for $29/month

Earnings

Financials

Technicals