Ambarella director proposes sale of 250 shares

The notice also reports a June 26, 2026 sale of 250 shares by the Paisley Living Trust.

Available on EDGAR 09/25/2026 - 10:01 AM EDT Accepted by SEC EDGAR 09/25/2026 - 10:00 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Ambarella Inc. director Christopher B. Paisley’s notice reports a proposed sale of 250 common shares, with an aggregate market value of $17,690.00 and an approximate sale date of September 25, 2026. Remarks state that the proposed sale and the prior three-month sale were in the Paisley Living Trust, of which Paisley is a trustee. The trust’s reported June 26, 2026 sale was 250 shares for $15,502.50.

Key Figures

Proposed shares for sale: 250 shares Aggregate market value: $17,690.00 Shares outstanding: 44,140,971 shares +4 more

7 metrics

Proposed shares for sale 250 shares Common shares; approximate sale date September 25, 2026

Aggregate market value $17,690.00 Proposed sale

Shares outstanding 44,140,971 shares Ambarella

Prior trust sale 250 shares Paisley Living Trust sale on June 26, 2026

Prior sale value $15,502.50 Paisley Living Trust sale on June 26, 2026

Shares acquired through restricted stock vesting 196 shares September 15, 2023

Shares acquired through restricted stock vesting 54 shares December 15, 2023

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact

3 terms

Rule 144 regulatory

"paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting technical

"Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Christopher B. Paisley"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

How many shares does AMBA director Christopher B. Paisley propose to sell?

The notice reports a proposed sale of 250 common shares, with an aggregate market value of $17,690.00 and an approximate sale date of September 25, 2026. Remarks state that the proposed sale occurred in the Paisley Living Trust, of which Paisley is a trustee.

What recent share sale did the Paisley Living Trust report for AMBA?

The Paisley Living Trust reported selling 250 shares on June 26, 2026, for $15,502.50. Remarks identify Christopher B. Paisley as a trustee of the trust.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001189229
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AMBARELLA INC
SEC File Number	001-35667
Address of Issuer	3001 TASMAN DRIVE SANTA CLARA CALIFORNIA 95054
Phone	408-734-8888
Name of Person for Whose Account the Securities are To Be Sold	PAISLEY CHRISTOPHER B
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	250	17690.00	44140971	09/25/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/15/2023	Restricted Stock Vesting	Issuer			196	09/15/2023	Compensation
Common	12/15/2023	Restricted Stock Vesting	Issuer			54	12/15/2023	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Paisley Living Trust 3001 Tasman Drive Santa Clara CA 95054	Common	06/26/2026	250	15502.50

144: Remarks and Signature

Remarks	Today's sale and sales from the past 3 months occurred in the Paisley Living Trust of which Christopher B. Paisley is a trustee.
Date of Notice	09/25/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/22/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Christopher B. Paisley
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)