[144] Ambarella, Inc. SEC Filing

Rhea-AI Filing Summary

Ambarella, Inc. (AMBA) filed a Form 144 reporting proposed insider sales of common stock. The filing notifies a brokered sale of 1,772 shares with an aggregate market value of $150,620, to be executed approximately on 09/08/2025 on NASDAQ. The seller previously acquired 1,463 restricted shares on 03/15/2021 and 309 restricted shares on 06/15/2022. The filing also discloses two recent open-market sales by the same person: 2,907 shares on 07/14/2025 for $194,289.32 and 342 shares on 06/17/2025 for $17,872.10. The notice includes the signer’s representation that no undisclosed material adverse information is known.

Positive

• Regulatory compliance: The filer provided required Rule 144 details including broker, acquisition dates, and prior sales.
• Transparency: Recent sales and acquisition history are disclosed, enabling investor visibility into insider activity.

Negative

• Insider selling activity: The person sold 3,249 shares in the past two months and proposes to sell an additional 1,772 shares, which may be viewed negatively by some investors.

Insights

Securities Analyst

TL;DR: Routine insider notice of planned sale; disclosed amounts are small relative to the issuer's outstanding shares, indicating limited market impact.

The Form 144 documents a proposed sale of 1,772 common shares valued at $150,620 and lists earlier acquisitions as restricted stock from 2021 and 2022. It also reports two recent sales totaling 3,249 shares that generated $212,161.42 in gross proceeds. Given the issuer's reported outstanding share count of 42,689,006, these transactions represent a very small fraction of outstanding equity. This filing serves primarily as compliance disclosure under Rule 144 rather than a material corporate event.

Compliance / Corporate Governance Expert

TL;DR: Filing appears procedurally complete and timely; provides necessary acquisition and sale history to satisfy Rule 144 requirements.

The notice includes the broker's name and address, acquisition dates and nature (restricted stock), and recent sales with gross proceeds, satisfying required disclosure fields. The signer affirms lack of undisclosed material adverse information and the document contains the standard criminal statute warning. No additional compliance exceptions or missing mandatory fields are evident from the provided content.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1772	150620.00	42689006	09/08/2025	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	03/15/2021	Restricted Stock	Issuer			1463	03/15/2021	Not Applicable
Common	06/15/2022	Restricted Stock	Issuer			309	06/15/2022	Not Applicable

* 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
CHRISTOPHER DAY 3001 Tasman Drive Santa Clara CA 95054	Common	07/14/2025	2907	194289.32
CHRISTOPHER DAY 3001 Tasman Drive Santa Clara CA 95054	Common	06/17/2025	342	17872.10

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Ambarella's (AMBA) Form 144 report?

The Form 144 reports a proposed brokered sale of 1,772 common shares valued at $150,620, with an approximate sale date of 09/08/2025 on NASDAQ.

Who is the broker handling the proposed AMBA sale?

The broker listed is Morgan Stanley Smith Barney LLC, Executive Financial Services, 1 New York Plaza, 8th Floor, New York, NY 10004.

What acquisition history is disclosed for the shares to be sold?

The filing shows the shares were acquired as restricted stock: 1,463 shares on 03/15/2021 and 309 shares on 06/15/2022.

Has the seller made recent sales of AMBA shares?

Yes. The filing discloses sales of 2,907 shares on 07/14/2025 for $194,289.32 and 342 shares on 06/17/2025 for $17,872.10.

How large are these sales relative to Ambarella's shares outstanding?

The filing lists 42,689,006 shares outstanding; the proposed sale of 1,772 shares represents a very small fraction of that total.