Ambarella CFO sells 1,896 shares at $67.28

Ambarella’s CFO executed a pre-planned sale of 1,896 shares and continues to hold over one hundred thousand shares.

Rhea-AI Filing Summary

Ambarella Inc (AMBA) reported that its chief financial officer, John Alexander Young, sold 1,896 Ordinary Shares on September 18, 2026 at a price of $67.28 per share. After this transaction, he held 107,806 Ordinary Shares directly. The sale was made under a Rule 10b5-1 trading plan adopted on January 15, 2026.

Insider Trade Summary 10b5-1

Net Seller: 1,896 shares

Net Sell 1 txn

Insider Young John Alexander

Role CFO

Sold 1,896 shs ($128K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1	1,896	$67.28	$128K

Holdings After Transaction: Ordinary Shares — 107,806 shares (Direct)

Footnotes (1)

1. F1. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026.

Key Figures

Shares sold: 1,896 shares Sale price per share: $67.28 per share Shares held after transaction: 107,806 shares

3 metrics

Shares sold 1,896 shares Ordinary Shares sold by the CFO on September 18, 2026

Sale price per share $67.28 per share Price for the 1,896 Ordinary Shares sold on September 18, 2026

Shares held after transaction 107,806 shares Direct Ordinary Share holdings of the CFO after the September 18, 2026 sale

Key Terms

Rule 10b5-1 trading plan, Ordinary Shares

2 terms

Rule 10b5-1 trading plan regulatory

"sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Ordinary Shares financial

"reported that its chief financial officer sold 1,896 Ordinary Shares on September 18, 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’s CFO report?

Ambarella’s chief financial officer, John Alexander Young, reported selling 1,896 Ordinary Shares on September 18, 2026 at $67.28 per share. After the sale, he continued to hold 107,806 Ordinary Shares directly.

At what price did the AMBA CFO sell his shares?

The CFO’s reported sale of Ambarella shares was executed at a price of $67.28 per share on September 18, 2026, involving 1,896 Ordinary Shares in a sale described as occurring in the open market or a private transaction.

How many AMBA shares does the CFO hold after this transaction?

Following the reported sale, Ambarella’s CFO, John Alexander Young, directly held 107,806 Ordinary Shares. This figure reflects his position immediately after disposing of 1,896 shares on September 18, 2026.

Was the AMBA CFO’s share sale made under a Rule 10b5-1 plan?

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026. Such plans prearrange trading instructions, so the timing of the September 18, 2026 sale was set in advance.

What type of security did the AMBA CFO sell?

The reported transaction involved Ordinary Shares of Ambarella Inc. On September 18, 2026, the CFO sold 1,896 Ordinary Shares at $67.28 per share, and held 107,806 Ordinary Shares directly after the sale.

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

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Available on EDGAR 09/21/2026 - 05:58 PM Accepted by SEC EDGAR 09/21/2026 - 05:57 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).

X

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)
09/18/2026

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	09/18/2026		S(1)		1,896	D	$67.28	107,806	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. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026.

	By: /s/Michael Morehead, Attorney-in-Fact, For: John Young	09/21/2026
	** 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)