Were Ambarella (AMBA) CFO’s June 2026 share sales made under a Rule 10b5-1 plan?

Yes. A footnote states the June 17, 2026 sales were executed under a Rule 10b5-1 trading plan adopted January 15, 2026. Such plans pre-schedule trades, reducing concerns that the timing reflects short-term views about Ambarella’s stock.

Ambarella (NASDAQ: AMBA) CFO sells 5,033 shares to cover RSU tax via 10b5-1

Filing Impact

(High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Ambarella CFO John Alexander Young reported open-market sales of 5,033 ordinary shares. The trades on June 17, 2026 were executed at prices of $66.98 and $67.87 per share.

According to the disclosure, the shares were sold to cover tax obligations arising from the vesting of restricted stock units and were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on January 15, 2026, indicating a routine, pre-planned transaction rather than a discretionary sale.

Insights

Ambarella’s CFO executed a small, pre-planned share sale mainly to cover taxes.

The filing shows CFO John Alexander Young completed open-market sales totaling 5,033 ordinary shares of Ambarella Inc. at prices between $66.98 and $67.87. The transaction uses code S, indicating standard open-market dispositions.

A key footnote states the shares were sold to satisfy tax obligations from vesting restricted stock units, which is a common, mechanistic event tied to equity compensation. Another footnote confirms the trades were executed under a Rule 10b5-1 trading plan adopted on January 15, 2026, suggesting the timing was pre-scheduled.

Because the sale size is modest and primarily tax-driven, and the trades followed a pre-arranged plan, the informational value for investors is limited. The filing mainly updates the market on routine compensation-related activity rather than signaling a change in management’s outlook on the company.

Insider Trade Summary 10b5-1

Net Seller: 5,033 shares ($339,946)

Net Sell 2 txns

Insider Young John Alexander

Role CFO

Sold 5,033 shs ($340K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	3,186	$67.87	$216K
Sale	Ordinary Shares	1,847	$66.98	$124K

Holdings After Transaction: Ordinary Shares — 114,437 shares (Direct, null)

Footnotes (1)

Shares sold to pay tax obligations resulting from the vesting of restricted stock units. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026.

Key Figures

Shares sold: 5,033 shares Sale price (lot 1): $66.98 per share Sale price (lot 2): $67.87 per share +2 more

5 metrics

Shares sold 5,033 shares Total ordinary shares sold on June 17, 2026

Sale price (lot 1) $66.98 per share Open-market sale of 1,847 shares

Sale price (lot 2) $67.87 per share Open-market sale of 3,186 shares

Transaction code S Open-market or private sale of non-derivative securities

Trading plan adoption date January 15, 2026 Date Rule 10b5-1 trading plan was adopted

Key Terms

Rule 10b5-1 trading plan, restricted stock units, open-market sale, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock units financial

"Shares sold to pay tax obligations resulting from the vesting of restricted stock units."

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.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

06/18/2026 - 04:55 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Young John Alexander

(Last)

(First)

(Middle)

3001 TASMAN DRIVE

(Street)

SANTA CLARA

CALIFORNIA

95054

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
AMBARELLA INC [ AMBA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares	06/17/2026		S		3,186⁽¹⁾	D	$67.87	114,437	D
Ordinary Shares	06/17/2026		S⁽²⁾		1,847	D	$66.98	112,590	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Shares sold to pay tax obligations resulting from the vesting of restricted stock units.

2. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026.

	By: /s/ Michael Morehead, Attorney-in-Fact For: John Young	06/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did Ambarella (AMBA) CFO John Alexander Young report in this Form 4?

Ambarella CFO John Alexander Young reported selling 5,033 ordinary shares in open-market transactions. The shares were sold on June 17, 2026, at prices between $66.98 and $67.87 per share, updating investors on his latest equity compensation-related activity.

Why did Ambarella (AMBA) CFO sell 5,033 shares in June 2026?

The CFO sold 5,033 shares primarily to pay tax obligations from vesting restricted stock units. This kind of sale is common when equity awards vest, as executives often dispose of a portion of shares to satisfy income and withholding tax requirements.

What prices did Ambarella (AMBA) CFO receive for the shares sold on June 17, 2026?

The reported sales occurred at prices of $66.98 and $67.87 per share. These prices reflect the market levels at which his broker executed the open-market transactions pursuant to the pre-arranged Rule 10b5-1 trading plan.

Does this Ambarella (AMBA) Form 4 indicate any derivative or option exercises?

No derivative or option exercises are shown in the summarized data. The transactions involve non-derivative ordinary shares only, coded as open-market sales, with no separate listed exercise price, exercise date, or remaining derivative positions in the filing excerpt.