Ambarella director granted 3,151 RSUs

Ambarella granted an annual RSU award of 3,151 Ordinary Shares to independent director Chantelle Breithaupt, vesting quarterly over one year.

Rhea-AI Filing Summary

AMBARELLA INC (symbol: AMBA) is the issuer of record for a Form 4 filing submitted to the SEC. Breithaupt Chantelle Yvette reported acquisition or exercise transactions in this Form 4 filing.

AMBARELLA INC (AMBA) reported that director Chantelle Yvette Breithaupt received an annual equity award on September 8, 2026, consisting of 3,151 Ordinary Shares in the form of a restricted stock unit grant approved by the Board of Directors.

The RSU grant vests as to 1/4 of the shares every three months after the vesting start date of September 15, 2026, becoming 100% vested on September 15, 2027, subject to her continued service with the company. Following this award, she holds 8,091 Ordinary Shares directly. No Rule 10b5-1 trading plan is reported for this grant.

Insider Trade Summary

Grant/Award: 3,151 shares

Grant/Award 1 txn

Insider Breithaupt Chantelle Yvette

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Ordinary Shares F1	3,151	$0.00	$0.00

Holdings After Transaction: Ordinary Shares — 8,091 shares (Direct)

Footnotes (1)

1. F1. Effective as of September 8, 2026, the Board of Directors approved an annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2026, so as to be 100% vested on September 15, 2027, subject to continued service with the Company.

Key Figures

RSU grant shares: 3,151 Ordinary Shares Shares held after transaction: 8,091 Ordinary Shares Grant effective date: September 8, 2026 +3 more

6 metrics

RSU grant shares 3,151 Ordinary Shares Annual restricted stock unit grant to each independent director effective September 8, 2026

Shares held after transaction 8,091 Ordinary Shares Direct holdings of Chantelle Breithaupt following the RSU award

Grant effective date September 8, 2026 Date the Board-approved annual RSU grant became effective

Vesting start date September 15, 2026 Start date for quarterly vesting of the RSU grant

Full vesting date September 15, 2027 Date on which the RSU grant becomes 100% vested, subject to continued service

Transaction price per share $0.00 per share Reported price for the RSU grant, reflecting a compensatory award

Key Terms

restricted stock unit, vesting start date, independent director

3 terms

restricted stock unit financial

"approved an annual restricted stock unit grant of 3,151 Ordinary Shares"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

vesting start date financial

"each three months following the vesting start date of September 15, 2026"

independent director regulatory

"annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director"

An independent director is a member of a company's board of directors who is not involved in the company's day-to-day operations and has no significant relationships with the company that could influence their judgment. Their role is to provide unbiased oversight and ensure the company is managed in the best interests of all shareholders. This helps build trust and confidence among investors by promoting transparency and accountability.

FAQ

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

What did AMBA director Chantelle Breithaupt receive in this Form 4 filing?

She received an annual equity award of 3,151 Ordinary Shares as a restricted stock unit grant approved by Ambarella’s Board of Directors, with no cash price per share reported for the grant.

How does the RSU vesting schedule work for the AMBA grant reported?

The RSU grant vests as to 1/4 of the 3,151 Ordinary Shares every three months after the vesting start date of September 15, 2026, and will be 100% vested on September 15, 2027, subject to continued service.

How many AMBA Ordinary Shares does Chantelle Breithaupt hold after this transaction?

After the grant, Chantelle Breithaupt directly holds 8,091 Ordinary Shares of Ambarella Inc., as reported in the Form 4 filing.

Was the AMBA RSU grant to Chantelle Breithaupt made under a Rule 10b5-1 plan?

No. The filing indicates the Rule 10b5-1 checkbox as not affirmed, and there is no footnote stating that the grant was made pursuant to a Rule 10b5-1 trading plan.

What role does Chantelle Breithaupt have at AMBARELLA INC?

She is reported as an independent director of Ambarella Inc., and the Board approved an annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director effective September 8, 2026.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/10/2026 - 04:49 PM Accepted by SEC EDGAR 09/10/2026 - 04:48 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^*

Breithaupt Chantelle Yvette

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/08/2026

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	09/08/2026		A		3,151(1)	A	$0.0	8,091	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. Effective as of September 8, 2026, the Board of Directors approved an annual restricted stock unit grant of 3,151 Ordinary Shares to each independent director. The RSU grant vests as to 1/4th of the Ordinary Shares each three months following the vesting start date of September 15, 2026, so as to be 100% vested on September 15, 2027, subject to continued service with the Company.

	By: /s/Michael Morehead, Attorney-in-Fact, For: Chantelle Breithaupt	09/10/2026
	** 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)