Ambarella director granted 3,151-share RSU award

Independent director Elizabeth M. Schwarting received a time‑vested RSU grant from AMBARELLA INC, increasing her direct holdings.

Rhea-AI Filing Summary

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

AMBARELLA INC (AMBA) reported that director Elizabeth M. Schwarting received an annual equity award in the form of 3,151 Ordinary Shares as a restricted stock unit grant effective September 8, 2026. The RSUs vest in four equal quarterly installments starting September 15, 2026 and are scheduled to be fully vested by September 15, 2027, subject to continued service. Following this grant, she holds 9,841 Ordinary Shares directly.

Insider Trade Summary

Grant/Award: 3,151 shares

Grant/Award 1 txn

Insider Schwarting Elizabeth M

Role Director

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

Holdings After Transaction: Ordinary Shares — 9,841 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 size: 3,151 shares Grant price per share: $0.00 per share Shares owned after transaction: 9,841 shares +2 more

5 metrics

RSU grant size 3,151 shares Annual restricted stock unit grant to an independent director effective September 8, 2026

Grant price per share $0.00 per share Compensatory RSU award of Ordinary Shares

Shares owned after transaction 9,841 shares Total direct Ordinary Shares held by Elizabeth M. Schwarting after the grant

Vesting completion date September 15, 2027 Date on which the RSU grant is scheduled to be 100% vested

Vesting installments 1/4 every three months Quarterly vesting schedule starting September 15, 2026 for the 3,151-share RSU grant

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

"following the vesting start date of September 15, 2026"

independent director financial

"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 insider transaction did AMBA director Elizabeth M. Schwarting report on this Form 4 for AMBA?

She reported an annual restricted stock unit grant of 3,151 Ordinary Shares effective September 8, 2026, approved for each independent director, with vesting over one year subject to continued service.

How many AMBA (AMBARELLA INC) shares did Elizabeth M. Schwarting acquire in this Form 4 filing?

She acquired 3,151 Ordinary Shares through a restricted stock unit award granted at a reported price of $0.00 per share, reflecting a compensatory equity grant rather than a market purchase.

What is Elizabeth M. Schwarting’s total direct share ownership in AMBA after this grant?

After the reported transaction, Elizabeth M. Schwarting directly holds 9,841 Ordinary Shares of AMBARELLA INC, as stated in the post‑transaction holdings field of the Form 4.

How do the AMBA RSUs granted to Elizabeth M. Schwarting vest over time?

The RSU grant of 3,151 Ordinary Shares 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 continued service.

Was the AMBA Form 4 transaction made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5‑1 checkbox is not marked as affirming a plan, and the footnote describes a Board‑approved annual RSU grant to each independent director, not a trading plan transaction.

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

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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^*

Schwarting Elizabeth M

(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	9,841	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: Elizabeth Schwarting	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)