Ambarella (AMBA) CEO nets RSU vesting, sells 27,059 shares while retaining 838,561

Rhea-AI Filing Summary

Ambarella CEO Feng-Ming Wang reported a mix of equity award activity and share sales. On March 17, 2026, he exercised 27,598 Performance Stock Units, receiving the same number of Ordinary Shares, then sold 18,976 Ordinary Shares at $52.77 per share. A footnote explains these shares were sold to cover tax obligations from restricted stock unit vesting.

On March 18, 2026, he received a fully vested bonus award of 15,686 restricted stock units, each convertible into one Ordinary Share. On March 19, 2026, he sold an additional 8,083 Ordinary Shares at $54.14 per share in an open-market transaction. Following these transactions, Wang directly holds 838,561 Ordinary Shares.

Insights

Equity compensation and insider-transactions analyst

CEO activity combines routine equity vesting with modest net share sales.

The CEO of Ambarella reported multiple linked transactions. A performance-based RSU grant vested at 100% of its target level after the company’s total stockholder return and revenue growth performance over the February 2023–January 2026 period, leading to the conversion of 27,598 units into Ordinary Shares.

He then sold 18,976 shares, explicitly described as covering tax obligations from restricted stock unit vesting, plus another 8,083 shares in an open-market sale. He also received a fully vested bonus award of 15,686 RSUs. With 838,561 Ordinary Shares held afterward and no remaining derivative position reported, this looks like routine compensation vesting and partial monetization rather than a transformative stake change.

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
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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^*

Wang Feng-Ming

(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)

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

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		27,598	A	(1)	849,934(2)	D
Ordinary Shares	03/17/2026		S		18,976(3)	D	$52.77	830,958	D
Ordinary Shares	03/18/2026		A		15,686(4)	A	$0.0	846,644	D
Ordinary Shares	03/19/2026		S		8,083(3)	D	$54.14	838,561	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
Performance Stock Units	(1)	03/17/2026		M			27,598	(5)	03/15/2026(5)	Ordinary Shares	27,598	$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: Feng-Ming Wang	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 transactions did Ambarella (AMBA) CEO Feng-Ming Wang report in this Form 4?

The CEO reported exercising 27,598 Performance Stock Units into Ordinary Shares, receiving a 15,686-share fully vested bonus RSU award, and selling a total of 27,059 Ordinary Shares at prices around $52.77 and $54.14 per share across several March 2026 transactions.

How many Ambarella (AMBA) shares did the CEO sell, and at what prices?

Feng-Ming Wang reported selling 18,976 Ordinary Shares at $52.77 per share and 8,083 Ordinary Shares at $54.14 per share. These transactions together reflect 27,059 shares sold in March 2026 under open-market sale codes on the Form 4.

What equity awards vested for Ambarella (AMBA) CEO Feng-Ming Wang in March 2026?

A performance-based RSU award for 27,598 shares vested at 100% of its target following measured total stockholder return and revenue growth over February 2023–January 2026. Additionally, a fully vested RSU bonus award of 15,686 units was granted as payment of his Fiscal Year 2026 annual bonus.

Why did Ambarella (AMBA) CEO sell 18,976 shares on March 17, 2026?

A footnote explains the 18,976 Ordinary Shares sold on March 17, 2026 were used to pay tax obligations arising from the vesting of restricted stock units. This indicates the disposition was tied to withholding for taxes rather than a purely discretionary sale decision.

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

After completing the reported March 2026 transactions, CEO Feng-Ming Wang directly holds 838,561 Ambarella Ordinary Shares. The derivative section shows no remaining Performance Stock Units, indicating the reported performance-based award was fully converted into shares in connection with vesting.

What performance conditions affected the Ambarella (AMBA) CEO’s RSU vesting outcome?

The performance-based RSU grant from April 3, 2023 could vest between 0% and 150% of a target amount, based on Ambarella’s total stockholder return and revenue growth from February 1, 2023 through January 31, 2026. Actual vesting was 100% of the Target RSU Number.