Ambarella CEO sells 6,086 shares at $64.83

Ambarella’s CEO sold shares primarily to cover tax from RSU vesting and now holds 767,759 shares directly.

Available on EDGAR 09/18/2026 - 04:52 PM EDT Accepted by SEC EDGAR 09/18/2026 - 04:51 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

AMBARELLA INC (AMBA) reported that its CEO and director Feng-Ming Wang sold 6,086 Ordinary Shares on September 17, 2026 in a sale characterized as an open-market or private transaction at a price of $64.83 per share. According to a footnote, these shares were sold to pay tax obligations arising from the vesting of restricted stock units. After this transaction, Wang directly holds 767,759 Ordinary Shares, which includes 238 shares acquired under the company’s employee stock purchase plan on September 15, 2026. No Rule 10b5-1 trading plan is reported for this sale.

Insider Trade Summary

Net Seller: 6,086 shares

Net Sell 1 txn

Insider Wang Feng-Ming

Role CEO

Sold 6,086 shs ($395K)

Share of Position Sold 0.79%

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1, F2	6,086	$64.83	$395K

Holdings After Transaction: Ordinary Shares — 767,759 shares (Direct)

Holdings Before and After: Ordinary Shares, 773,845 to 767,759 shares (Direct)

Other Insiders: 3 other insiders reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (2)

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.

Key Figures

Shares sold: 6,086 shares Sale price per share: $64.83 per share Shares held after transaction: 767,759 shares +1 more

4 metrics

Shares sold 6,086 shares Ordinary Shares sold on September 17, 2026 by CEO Feng-Ming Wang

Sale price per share $64.83 per share Price for the 6,086 Ordinary Shares sold on September 17, 2026

Shares held after transaction 767,759 shares Direct Ordinary Share holdings of Feng-Ming Wang after the sale

Employee stock purchase plan acquisition 238 shares Ordinary Shares acquired under the employee stock purchase plan on September 15, 2026

Key Terms

restricted stock units, employee stock purchase plan, Ordinary Shares

3 terms

restricted stock units financial

"Shares sold to pay 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.

employee stock purchase plan financial

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

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Ordinary Shares financial

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

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.

FAQ

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

What insider transaction did AMBA CEO Feng-Ming Wang report in this Form 4 for AMBA?

Feng-Ming Wang reported a sale of 6,086 Ordinary Shares of AMBARELLA INC on September 17, 2026, in a transaction described as an open-market or private sale at $64.83 per share.

Why were AMBA shares sold by the CEO on September 17, 2026?

The 6,086 Ordinary Shares were sold to pay tax obligations resulting from the vesting of restricted stock units, according to the transaction footnote.

How many AMBA shares does CEO Feng-Ming Wang hold after this transaction?

Following the sale, Feng-Ming Wang directly holds 767,759 Ordinary Shares of AMBARELLA INC. This total includes 238 shares acquired under the company’s employee stock purchase plan on September 15, 2026.

What was the sale price for the AMBA shares sold by the CEO?

The 6,086 Ordinary Shares were sold at a price of $64.83 per share on September 17, 2026, in a sale characterized as an open-market or private transaction.

Were the AMBA CEO’s September 2026 share sales under a Rule 10b5-1 trading plan?

No. The filing indicates that no Rule 10b5-1 trading plan is reported for the sale of 6,086 Ordinary Shares on September 17, 2026.

Did the AMBA CEO recently acquire any shares through an employee stock purchase plan?

Yes. A footnote states that the CEO’s post-transaction holdings of 767,759 Ordinary Shares include 238 shares acquired under the company’s employee stock purchase plan on September 15, 2026.

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

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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^*

Wang Feng-Ming

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026

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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	09/17/2026		S		6,086(1)	D	$64.83	767,759(2)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

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

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

	By: /s/Michael Morehead, Attorney-in-Fact, For: Feng-Ming Wang	09/18/2026
	** 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)