[Form 4] AMBARELLA INC Insider Trading Activity

Rhea-AI Filing Summary

Leslie Kohn, Chief Technology Officer and director of Ambarella, reported a small sale of company stock on 09/17/2025. The filing shows 2,249 ordinary shares were sold at $79.43 per share under transaction code S, with the stated purpose that the shares were sold to pay tax obligations arising from restricted stock unit vesting.

After the sale, the filing reports 977,428 shares beneficially owned by Kohn. The transaction appears routine and limited in size relative to the reported holdings.

Insights

Corporate Governance Expert

TL;DR: Routine insider sale to cover taxes; immaterial relative to total holdings.

The report documents a common post-vesting disposition: 2,249 shares sold to satisfy tax obligations. As a director and CTO, Kohn’s transaction aligns with typical liquidity events tied to RSU vesting rather than a directional bet on the company’s outlook. The remaining beneficial ownership of 977,428 shares indicates continued substantial alignment with shareholders. No governance red flags or unusual transaction structures are disclosed.

Securities Analyst

TL;DR: Transaction size is minimal; unlikely to affect valuation or market perception materially.

The sale represents roughly 0.23% of the reported post-transaction holdings, implying negligible selling pressure. The disclosed per-share price of $79.43 provides a concrete execution point for the sale but does not indicate broader insider trend. Because the form states the sale funded tax obligations from RSU vesting, this is a standard, non-strategic disposal rather than evidence of negative private information.

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
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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^*

Kohn Leslie

(Last) (First) (Middle)

3001 TASMAN DRIVE

(Street)

SANTA CLARA CA 95054

(City) (State) (Zip)

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)
	Chief Technology Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2025

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

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

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

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	09/17/2025		S		2,249(1)	D	$79.43	977,428	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.

	By: /s/ Michael Morehead, Attorney-in-Fact For: Leslie Kohn	09/19/2025
	** 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.

FAQ

What did AMBA CTO Leslie Kohn report on Form 4?

The filing reports a sale of 2,249 ordinary shares at $79.43 per share, disclosed as proceeds to pay tax obligations from RSU vesting.

How many AMBA shares does Leslie Kohn beneficially own after the sale?

The Form 4 states 977,428 shares beneficially owned following the reported transaction.

When was the AMBA insider transaction executed?

The transaction date listed is 09/17/2025 and is coded as a sale (S), per the filing.

Was the sale tied to any trading plan like Rule 10b5-1?

The filing does not indicate the transaction was made pursuant to a Rule 10b5-1 plan; it states the sale funded tax obligations from RSU vesting.

Who signed the Form 4 on behalf of the reporting person?

The signature on the filing is by Michael Morehead, Attorney-in-Fact for Leslie Kohn.