Ambarella (NASDAQ: AMBA) CFO sells 400 shares and exercises options under 10b5-1 plan

Rhea-AI Filing Summary

Ambarella Inc CFO John Alexander Young reported a small, routine option exercise and share sale. On 2026-05-26, he exercised options for 400 Ordinary Shares at an exercise price of $55.80 per share and sold 400 Ordinary Shares in an open-market transaction at $96.00 per share. The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on January 15, 2026, indicating the timing was set in advance. After these transactions, he directly holds 117,623 Ordinary Shares and 24,600 Non-Qualified Stock Options, showing he retains a substantial equity position.

Insider Trade Summary 10b5-1

Net Seller: 400 shares ($38,400)

Net Sell 3 txns

Insider Young John Alexander

Role CFO

Sold 400 shs ($38K)

Type	Security	Shares	Price	Value
Exercise	Non-Qualified Stock Option (right to buy)	400	$0.00	--
Exercise	Ordinary Shares	400	$55.80	$22K
Sale	Ordinary Shares	400	$96.00	$38K

Holdings After Transaction: Non-Qualified Stock Option (right to buy) — 24,600 shares (Direct, null); Ordinary Shares — 118,023 shares (Direct, null)

Footnotes (1)

1. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on January 15, 2026. 25% of the Shares subject to the option vest on March 27, 2018 and 1/48 of the shares vest monthly thereafter.

Key Figures

Shares sold: 400 shares Sale price: $96.00 per share Options exercised: 400 shares +4 more

7 metrics

Shares sold 400 shares Open-market sale of Ordinary Shares on May 26, 2026 at $96.00

Sale price $96.00 per share Price for 400 Ordinary Shares sold on May 26, 2026

Options exercised 400 shares Non-Qualified Stock Option exercise into Ordinary Shares

Option exercise price $55.80 per share Exercise price for Non-Qualified Stock Option

Shares held after 117,623 shares Direct Ordinary Share holdings following transactions

Options remaining 24,600 options Non-Qualified Stock Options outstanding after exercise

Option expiration March 27, 2027 Expiration date of Non-Qualified Stock Option grant

Key Terms

Rule 10b5-1 trading plan, Non-Qualified Stock Option (right to buy), open-market sale, derivative security

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.

Non-Qualified Stock Option (right to buy) financial

"Non-Qualified Stock Option (right to buy) with 400 underlying Ordinary Shares and a $55.80 exercise price."

open-market sale financial

"400 Ordinary Shares were disposed of in an open-market sale at $96.00 per share."

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.

derivative security financial

"The transaction code description notes an exercise or conversion of derivative security."

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

Form 4 Insider Transactions: What Each Field Means →

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).

X

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)
05/26/2026

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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	05/26/2026		M		400	A	$55.8	118,023	D
Ordinary Shares	05/26/2026		S(1)		400	D	$96	117,623	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-Qualified Stock Option (right to buy)	$55.8	05/26/2026		M			400	(2)	03/27/2027	Ordinary Shares	400	$0.0	24,600	D

Explanation of Responses:

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

2. 25% of the Shares subject to the option vest on March 27, 2018 and 1/48 of the shares vest monthly thereafter.

	By: /s/ Michael Morehead, Attorney-in-Fact For: John Young	05/28/2026
	** 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)

FAQ

What insider transactions did AMBA CFO John Alexander Young report?

CFO John Alexander Young exercised options for 400 Ordinary Shares and sold 400 Ordinary Shares. Both transactions occurred on 26 May 2026 and were reported as an option exercise and an open-market sale, respectively, in a Form 4 filing.

At what prices did the AMBA CFO exercise options and sell shares?

He exercised options at an exercise price of $55.80 per share and sold 400 Ordinary Shares at $96.00 per share. These prices reflect the strike price of the option and the open-market sale price reported in the Form 4.

How many Ambarella (AMBA) shares does the CFO hold after these Form 4 transactions?

Following the reported transactions, the CFO directly holds 117,623 Ordinary Shares of Ambarella. He also retains 24,600 Non-Qualified Stock Options, according to the holding balances reported after the trades in the filing.

Were the AMBA CFO’s share sales made under a Rule 10b5-1 plan?

Yes. The filing notes the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on 15 January 2026. Such plans pre-schedule trades, indicating the timing of sales was determined in advance rather than decided opportunistically.

What type of derivative security did the AMBA CFO exercise?

He exercised a Non-Qualified Stock Option covering 400 underlying Ordinary Shares at a $55.80 exercise price. After this exercise, 24,600 stock options remained outstanding, with an option expiration date of 27 March 2027 reported in the filing.