Ambarella CFO sells 3,126 shares at $64.83

Ambarella’s CFO executed a tax-related sale of 3,126 shares and now directly holds 109,702 ordinary shares.

Rhea-AI Filing Summary

AMBARELLA INC (AMBA) reported that its chief financial officer, John Alexander Young, sold 3,126 Ordinary Shares on September 17, 2026 at $64.83 per share. According to the company’s disclosure, the shares were sold to pay tax obligations arising from the vesting of restricted stock units. After this transaction, Young directly holds 109,702 Ordinary Shares, which includes 238 shares acquired under the company’s employee stock purchase plan on September 15, 2026.

Insider Trade Summary

Net Seller: 3,126 shares

Net Sell 1 txn

Insider Young John Alexander

Role CFO

Sold 3,126 shs ($203K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1, F2	3,126	$64.83	$203K

Holdings After Transaction: Ordinary Shares — 109,702 shares (Direct)

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: 3,126 shares Sale price per share: $64.83 per share Shares held after transaction: 109,702 shares +1 more

4 metrics

Shares sold 3,126 shares Ordinary Shares sold by the CFO on September 17, 2026

Sale price per share $64.83 per share Price for the 3,126 Ordinary Shares sold on September 17, 2026

Shares held after transaction 109,702 shares Direct Ordinary Shares held by the CFO following the sale

ESPP shares acquired 238 shares 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

"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

"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

"3,126 Ordinary Shares sold on September 17, 2026"

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 CFO John Alexander Young report on this Form 4?

John Alexander Young reported selling 3,126 Ordinary Shares of AMBARELLA INC on September 17, 2026 at $64.83 per share in a transaction described as a sale in the open market or a private transaction.

Why did the AMBA CFO sell 3,126 shares according to the filing?

The filing states that the 3,126 shares were sold to pay tax obligations resulting from the vesting of restricted stock units, indicating the sale was tied to tax liabilities from equity compensation.

How many AMBA shares does the CFO hold after the reported sale?

After the sale, John Alexander Young directly holds 109,702 Ordinary Shares of AMBARELLA INC. This total includes shares acquired through the company’s employee stock purchase plan on September 15, 2026.

What price did the AMBA CFO receive per share in the September 17, 2026 sale?

The reported sale price was $64.83 per share for the 3,126 Ordinary Shares sold on September 17, 2026, described as a sale in an open market or private transaction.

Did the AMBA CFO acquire any shares close in time to this sale?

Yes. A footnote states that the post-transaction holdings of 109,702 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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Available on EDGAR 09/18/2026 - 04:50 PM Accepted by SEC EDGAR 09/18/2026 - 04:50 PM Learn about SEC filing dates

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^*

Young John Alexander

(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)
	CFO

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		3,126(1)	D	$64.83	109,702(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: John Young	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)