Ambarella (NASDAQ: AMBA) insider John Young reports Rule 144 sales

Rhea-AI Filing Summary

Ambarella, Inc. Rule 144 notice reports planned and recent dispositions of Common Stock tied to restricted stock units and 10b5-1 instructions. The filing lists 1,847 shares associated with Restricted Stock Units dated 06/15/2026, and three 10b5-1 sale legs: 400, 1,971, and 3,038 shares on 05/26/2026, 04/21/2026, and 03/19/2026, respectively.

The entries identify the seller as John A. Young and show aggregate proceeds per leg as listed in the table. These are routine compliant disclosures of planned and completed sales under Rule 144 and pre-arranged trading plans.

Insights

Corporate Governance Analyst

Routine Rule 144/10b5-1 dispositions by an insider are disclosed.

The filing lists 1,847 shares tied to restricted stock units dated 06/15/2026 and three executed 10b5-1 sale legs of 400, 1,971, and 3,038 shares on the dates shown. The reporting person is John A. Young.

These entries record planned and completed sales under established mechanisms; cash‑flow treatment and any remaining holdings are not stated in the excerpt. Subsequent filings may show consolidated post‑transaction positions.

Key Figures

RSU shares: 1,847 shares 10b5-1 sale (May): 400 shares 10b5-1 sale (Apr): 1,971 shares +1 more

4 metrics

RSU shares 1,847 shares Restricted Stock Units dated 06/15/2026

10b5-1 sale (May) 400 shares 10b5-1 sale on 05/26/2026, proceeds listed $38,400.00

10b5-1 sale (Apr) 1,971 shares 10b5-1 sale on 04/21/2026, proceeds listed $118,260.00

10b5-1 sale (Mar) 3,038 shares Sale on 03/19/2026, proceeds listed $164,477.32

Key Terms

10b5-1, Restricted Stock Units, Rule 144

3 terms

10b5-1 regulatory

"10b5-1 Sales for JOHN A YOUNG 3001 Tasman Drive Santa Clara CA"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 1847 | 06/15/2026"

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.

Rule 144 regulatory

"144: Securities To Be Sold"

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.

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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
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	1847	123970.64	43868185	06/17/2026	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	06/15/2026	Restricted Stock Units	Issuer			1847	06/15/2026	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
10b5-1 Sales for JOHN A YOUNG 3001 Tasman Drive Santa Clara CA 95054	Common	05/26/2026	400	38400.00
10b5-1 Sales for JOHN A YOUNG 3001 Tasman Drive Santa Clara CA 95054	Common	04/21/2026	1971	118260.00
JOHN YOUNG 3001 Tasman Drive Santa Clara CA 95054	Common	03/19/2026	3038	164477.32

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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 filing disclose?

The filing discloses planned and completed sales of Common Stock by John A. Young. It lists 1,847 RSU shares dated 06/15/2026 and three 10b5-1 sale legs of 400, 1,971, and 3,038 shares on specified dates.

Who is the seller named in the AMBA Form 144?

The seller reported is John A. Young. The filing identifies him as the reporting party for both the Restricted Stock Units and the 10b5-1 sales listed in the excerpt, with sale dates in 03/19/2026 through 05/26/2026.

Were the sales executed under a trading plan in the AMBA notice?

Yes. The filing references 10b5-1 Sales for John A. Young for the legs on 03/19/2026, 04/21/2026, and 05/26/2026. The excerpt also lists Restricted Stock Units dated 06/15/2026 associated with the issuer.

How many shares are associated with the Restricted Stock Units in this AMBA filing?

The Restricted Stock Units entry in the excerpt shows 1,847 shares dated 06/15/2026. The line labels these as RSUs and ties them to the issuer in the securities table provided.