Ambarella COO sells shares for tax obligations

Ambarella Inc. Chief Operations Officer W. Chan Lee reported an open-market sale of Ordinary Shares primarily to cover tax obligations from vesting restricted stock units.

Filing Impact

(Moderate)

Filing Sentiment

(Negative)How Sentiment works

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Form Type

Rhea-AI Filing Summary

Ambarella Inc. Chief Operations Officer W. Chan Lee reported an open-market sale of Ordinary Shares primarily to cover tax obligations from vesting restricted stock units. Lee sold 2,951 shares at an average price of $67.87 per share and continues to hold 157,098 shares directly after the transaction.

Insider Trade Summary

Net Seller: 2,951 shares

Net Sell 1 txn

Insider Lee Chan W

Role Chief Operations Officer

Sold 2,951 shs ($200K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	2,951	$67.87	$200K

Holdings After Transaction: Ordinary Shares — 157,098 shares (Direct)

Footnotes (1)

F1. Shares sold to pay tax obligations resulting from the vesting of restricted stock units.

Key Figures

Shares sold: 2,951 shares Sale price: $67.87 per share Shares held after transaction: 157,098 shares +1 more

4 metrics

Shares sold 2,951 shares Open-market sale on 2026-06-17

Sale price $67.87 per share Average price for Ordinary Shares sold

Shares held after transaction 157,098 shares Direct ownership following sale

Net shares sold 2,951 shares Net sell direction in transaction summary

Key Terms

Ordinary Shares, restricted stock units, open-market sale, tax obligations

4 terms

Ordinary Shares financial

"security_title: "Ordinary Shares""

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

restricted stock units financial

"tax obligations resulting from the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

tax obligations financial

"Shares sold to pay tax obligations resulting from the vesting"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did AMBA COO W. Chan Lee report?

W. Chan Lee reported selling 2,951 Ordinary Shares of Ambarella Inc. at $67.87 per share. The sale was disclosed as an open-market transaction and was linked to tax obligations from vested restricted stock units.

Why did the AMBA COO sell 2,951 shares of Ambarella stock?

The shares were sold to pay tax obligations arising from the vesting of restricted stock units. This type of sale is typically administrative, helping cover income tax due when stock-based compensation vests, rather than reflecting a strategic portfolio decision.

How many Ambarella (AMBA) shares does the COO hold after the sale?

After selling 2,951 shares, W. Chan Lee directly holds 157,098 Ordinary Shares of Ambarella Inc. This remaining position, disclosed in the filing, shows continued substantial ownership following the tax-related sale linked to restricted stock unit vesting.

Was the AMBA COO’s transaction an open-market sale?

Yes. The filing classifies the transaction as an open-market sale of Ordinary Shares. Although open-market, the accompanying footnote explains the sale’s purpose was to pay tax obligations from restricted stock unit vesting, indicating a primarily administrative motivation.

Does this Ambarella Form 4 indicate option exercises or derivatives?

No derivative transactions were reported in this Form 4. The filing shows only a non-derivative sale of Ordinary Shares, and the derivative position summary is empty, indicating no concurrent option exercises or other derivative security activities in this report.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/18/2026 - 04:55 PM EDT

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lee Chan W

(Last)

(First)

(Middle)

3001 TASMAN DRIVE

(Street)

SANTA CLARA

CALIFORNIA

95054

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
AMBARELLA INC [ AMBA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Operations Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares	06/17/2026		S		2,951⁽¹⁾	D	$67.87	157,098	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

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

	By: /s/ Michael Morehead, Attorney-in-Fact For: Chan W. Lee	06/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR