[144] AMBARELLA INC SEC Filing

Rhea-AI Filing Summary

Form 144 notice for AMBARELLA INC (AMBA): An officer/insider intends to sell 1,000 common shares on 09/22/2025 via Morgan Stanley Smith Barney LLC, with an aggregate market value listed at $89,000. The 1,000 shares were acquired as performance shares on 03/15/2021 and paid for on that date. The filing also discloses prior insider sales in the past three months totaling 6,869 shares for gross proceeds of $525,974.75 across five transactions dated 07/14/2025 through 09/19/2025. The filer certifies no undisclosed material adverse information. The table lists the broker, planned sale date, and securities exchange (NASDAQ).

Positive

• Compliance disclosure: The filing provides required Rule 144 details including broker, acquisition date, and planned sale date, supporting transparency.
• Acquisition clarity: The shares to be sold were acquired as performance shares on 03/15/2021, which is explicitly disclosed.

Negative

• Ongoing insider selling: The filer sold 6,869 shares in the past three months for $525,974.75, which may be notable to investors monitoring insider activity.
• Planned sale: An additional 1,000 shares valued at $89,000 is scheduled for 09/22/2025.

Insights

Securities Analyst

TL;DR: Insider filing shows continued disposition of shares totaling 6,869 in prior months and a planned sale of 1,000 shares, indicating ongoing insider selling activity.

This Form 144 provides clear, itemized disclosure of recent insider sales and a proposed sale, including dates, quantities, and gross proceeds. The planned sale of 1,000 shares (market value $89,000) was acquired as performance shares in 2021, so these are not open-market purchases but grant-based dispositions. Materiality is modest relative to company size (not stated), but the cumulative past-three-month sales of 6,869 shares and proceeds of $525,974.75 are relevant for monitoring insider liquidity and timing.

Corporate Governance Expert

TL;DR: Form 144 appears procedurally complete and the signer affirms no undisclosed material adverse information.

The filing documents compliance with Rule 144 requirements: broker identity, acquisition details (performance shares dated 03/15/2021), and signature certification language. From a governance perspective, the disclosure supports transparency about insider selling. There is no indication in the document of insider trading plan dates or additional restrictions; those details are not provided. The governance implication is routine disclosure rather than a governance red flag based solely on this form.

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	1000	89000.00	42689006	09/22/2025	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	Performance Shares	Issuer			1000	03/15/2021	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	09/19/2025	1000	84000.00
CHRISTOPHER DAY 3001 Tasman Drive Santa Clara CA 95054	Common	09/18/2025	829	68392.50
CHRISTOPHER DAY 3001 Tasman Drive Santa Clara CA 95054	Common	09/17/2025	361	28672.93
CHRISTOPHER DAY 3001 Tasman Drive Santa Clara CA 95054	Common	09/08/2025	1772	150620.00
CHRISTOPHER DAY 3001 Tasman Drive Santa Clara CA 95054	Common	07/14/2025	2907	194289.32

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 AMBA Form 144 disclose about the planned sale on 09/22/2025?

The filing shows a planned sale of 1,000 common shares via Morgan Stanley Smith Barney LLC on 09/22/2025 with an aggregate market value of $89,000.

When were the 1,000 shares being sold acquired?

The 1,000 shares were acquired as performance shares on 03/15/2021 and payment is listed as 03/15/2021.

How many shares did the filer sell in the past three months and what were the proceeds?

The filer sold a total of 6,869 shares in the past three months for gross proceeds of $525,974.75 across five transactions dated 07/14/2025 to 09/19/2025.

Which broker and exchange are involved in the proposed sale?

The broker is Morgan Stanley Smith Barney LLC and the securities exchange listed is NASDAQ.

Does the filing state whether undisclosed material adverse information exists?

The filer certifies by signature that they do not know any material adverse information about the issuer that has not been publicly disclosed.