Form 144: Restricted Stock Unit Sales Filed

Rule 144 notice filed reporting restricted stock unit sales.

Rhea-AI Filing Summary

Rule 144 notice filed reporting restricted stock unit sales. The filing lists Restricted Stock Units dated 03/15/2026 and identifies two reported dispositions by John Young: 3,038 shares sold on 03/19/2026 for $164,477.32 and 4,577 shares sold on 03/17/2026 for $241,528.29. The filing header shows a submission date of 04/21/2026.

Insights

Corporate Governance Analyst

Routine Rule 144 disclosures record secondary sales of RSUs by an insider.

The filing lists Restricted Stock Units dated 03/15/2026 and two related reported dispositions by John Young on 03/17/2026 and 03/19/2026. The transactions appear as reported sale entries with per-transaction dollar amounts provided.

These notices are administrative disclosures under resale rules; cash-flow treatment and whether transactions were planned under a trading arrangement are not stated in the excerpt. Subsequent filings or broker confirmations would be needed for more context.

Key Figures

Filing date: 04/21/2026 Disposition 1: 4,577 shares Disposition 2: 3,038 shares

3 metrics

Filing date 04/21/2026 header submission date

Disposition 1 4,577 shares sold on 03/17/2026 for $241,528.29

Disposition 2 3,038 shares sold on 03/19/2026 for $164,477.32

Key Terms

Restricted Stock Units, Securities To Be Sold, Securities Sold During The Past 3 Months

3 terms

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 03/15/2026"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Securities To Be Sold regulatory

"144: Securities To Be Sold"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

What does AMBA's Form 144 report about insider sales?

The Form 144 reports two insider dispositions of common shares by John Young. It lists 4,577 shares sold on 03/17/2026 for $241,528.29 and 3,038 shares sold on 03/19/2026 for $164,477.32. The filing also references Restricted Stock Units dated 03/15/2026.

Were the reported sales tied to Restricted Stock Units (RSUs) for AMBA?

Yes. The filing lists Restricted Stock Units dated 03/15/2026 under "Securities To Be Sold." The document links those RSUs to the reported dispositions but does not detail conversion mechanics or withholding treatment.

When was the Form 144 for AMBA filed?

The header of the excerpt shows a filing date of 04/21/2026. That date appears as the submission date in the provided content and frames when the Rule 144 notice was recorded.

Who is the reporting person on the AMBA Form 144?

The reporting person named in the excerpt is John Young, with an address at 3001 Tasman Drive, Santa Clara, CA. Two separate sale entries are shown under his name with specific share counts and dollar amounts.

Do the Form 144 entries state whether proceeds go to the issuer or selling holder?

The excerpt does not specify proceeds treatment. The entries list sale amounts for each transaction, but cash-flow treatment is not provided in the supplied text.

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

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Accepted by SEC EDGAR 04/21/2026 - 04:27 PM Learn about SEC filing dates

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	0002009866
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	4087348888
Name of Person for Whose Account the Securities are To Be Sold	JOHN YOUNG
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	Officer

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	1971	116840.88	43788879	04/21/2026	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	03/15/2026	Restricted Stock Units	Issuer			1971	03/15/2026	N/A

* 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
JOHN YOUNG 3001 Tasman Drive Santa Clara, CA 95054	Common	03/19/2026	3038	164477.32
JOHN YOUNG 3001 Tasman Drive Santa Clara, CA 95054	Common	03/17/2026	4577	241528.29

144: Remarks and Signature

Remarks
Date of Notice	04/21/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	01/15/2026
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/ John Young
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)