Transaction · 0001280263-26-000071

Lee Chan W

Lee Chan W, COO, reported an open-market or private sale at AMBARELLA INC involving 2893.000000 shares for an estimated $187553.19. Reported holdings after the transaction were 154443.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SCOO
AMBAAMBARELLA INC
Trade date
Sep 17, 2026
Filing date
Sep 18, 2026
View on SEC Insider profile
Disclosed value-$187kShares × reported price
Shares traded2.89k$64.83 per share
Holdings after154kDirect
% of reported position traded1.84%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 157,336 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

AMBA price since this filing

Daily closing prices, with the filing date and available return windows
AMBA · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago1w ago1d ago -5.1%
Returns since7d +9.9%30d -6.7%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001280263-26-000071
Ordinary Shares
Transaction date
Sep 17, 2026
Filed Sep 18, 2026, 08:50 PM · 1d delay
Shares
2,893 sh
$64.83 per share
Estimated value
-$187k
Computed from shares × price
Holdings after
154,443 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Large Sale
Filing-only score

+10 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Operations Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Shares sold to pay tax obligations resulting from the vesting of restricted stock units.

  2. F2

    Includes 238 shares acquired under the Company's employee stock purchase plan on September 15, 2026.

Original filing · 0001280263-26-000071
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