Ambarella (NASDAQ: AMBA) SVP reports RSU vesting, bonus grant and share sales

Rhea-AI Filing Summary

Ambarella Inc. executive Ju Chi-Hong reported a mix of stock awards, vesting, and modest share sales. On March 17, 2026, performance stock units covering 9,553 Ordinary Shares vested at 100% of the target level based on total stockholder return and revenue growth over a specified period, and were converted into Ordinary Shares. That same day, 4,729 Ordinary Shares were sold at $52.77 per share, with a footnote stating shares were sold to pay tax obligations from restricted stock unit vesting. On March 18, 2026, he received 5,930 fully vested restricted stock units as payment of his Fiscal Year 2026 annual bonus, each representing one Ordinary Share. On March 19, 2026, he sold 2,155 Ordinary Shares at $54.14 per share in open-market transactions. Following these transactions, Ju Chi-Hong holds 167,941 Ordinary Shares directly and 8,000 shares indirectly through a foundation, indicating the sales represent a small portion of his overall position.

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^*

Ju Chi-Hong

(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)
	Senior VP, Systems & GM, Asia

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/17/2026

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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	03/17/2026		M		9,553	A	(1)	168,895(2)	D
Ordinary Shares	03/17/2026		S		4,729(3)	D	$52.77	164,166	D
Ordinary Shares	03/18/2026		A		5,930(4)	A	$0.0	170,096	D
Ordinary Shares	03/19/2026		S		2,155(3)	D	$54.14	167,941	D
Ordinary Shares								8,000	I	by Foundation

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
Performance Stock Units	(1)	03/17/2026		M			9,553	(5)	03/15/2026(5)	Ordinary Shares	9,553	$0.0	0	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

2. Includes 154 shares acquired under the Company's employee stock purchase plan on March 16, 2026.

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

4. Represents an award of fully-vested restricted stock units (RSUs) issued to reporting person as payment of reporting person's annual bonus under the company's previously established Fiscal Year 2026 Annual Bonus Plan. Each restricted stock unit represents a contingent right to receive one Ordinary Share.

5. On April 3, 2023, reporting person was granted a performance-based RSU award covering a target number of ordinary shares (the "Target RSU Number"). Pursuant to time-based vesting requirements, the award would vest in full on March 15, 2026. In addition, the number of shares subject to the award could be decreased by up to 100% or increased by up to 150% of the Target RSU Number, based on attainment of specified levels of the Company's total stockholder return and revenue growth over the period of February 1, 2023 through January 31, 2026 (the "TSR Period"). As a result of the Company's performance over the TSR Period, the number of shares that vested was 100% of the Target RSU Number.

	By: /s/ Michael Morehead, Attorney-in-Fact For: Chi-Hong Ju	03/19/2026
	** 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 stock transactions did Ambarella (AMBA) executive Ju Chi-Hong report?

Ju Chi-Hong reported vesting of 9,553 performance stock units, a grant of 5,930 fully vested restricted stock units as a bonus, and open-market sales totaling 6,884 Ordinary Shares across March 17–19, 2026, according to the Form 4 filing.

How many Ambarella (AMBA) shares did Ju Chi-Hong sell and at what prices?

He sold 4,729 Ordinary Shares on March 17, 2026 at approximately $52.77 per share and 2,155 Ordinary Shares on March 19, 2026 at approximately $54.14 per share. A footnote states some shares were sold to pay tax obligations from RSU vesting.

What new Ambarella (AMBA) equity awards did Ju Chi-Hong receive in this Form 4?

He received 5,930 fully vested restricted stock units on March 18, 2026 as payment of his Fiscal Year 2026 annual bonus. Each RSU represents a contingent right to receive one Ordinary Share of Ambarella Inc., according to the disclosure.

How did Ambarella (AMBA) performance-based RSUs vest for Ju Chi-Hong?

A performance-based RSU award granted April 3, 2023 vested on March 15, 2026 at 100% of the target share number. Vesting depended on total stockholder return and revenue growth from February 1, 2023 through January 31, 2026, with results yielding the target level.

What are Ju Chi-Hong’s Ambarella (AMBA) share holdings after these transactions?

After the reported transactions, he holds 167,941 Ambarella Ordinary Shares directly. In addition, 8,000 Ordinary Shares are held indirectly by a foundation. These figures come from the post-transaction ownership amounts disclosed in the Form 4 filing.

Did Ambarella (AMBA) indicate why some shares were sold by Ju Chi-Hong?

A footnote explains that shares were sold to pay tax obligations resulting from the vesting of restricted stock units. This indicates at least part of the reported sales were related to covering tax liabilities tied to equity compensation vesting.