RBB Bancorp (RBB) CAO reports 767-share RSU vesting

Rhea-AI Filing Summary

RBB Bancorp (RBB) reported insider equity activity by Chief Accounting Officer Diana Hanson. On 08/19/2026, 767 Restricted Stock Units were converted into 767 shares of Common Stock. Of these, 276 shares were withheld or delivered to cover exercise price or tax liability, and 491 shares effectively remained with the officer. RSUs convert into common stock on a one-for-one basis, and 1,255 underlying shares remain subject to unvested RSUs that vest in scheduled annual installments.

Insider Trade Summary

Net Buyer: 491 shares

Net Buy 4 txns

Insider Hanson Diana

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F4, F2, F1	767	$0.00	$0.00
Exercise	Common Stock, No Par Value	767	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock, No Par Value	276	$26.40	$7K
holding	Restricted Stock Units F4, F3, F1	--	--	--

Holdings After Transaction: Restricted Stock Units — 2,788 shares (Direct); Common Stock, No Par Value — 983 shares (Direct)

Footnotes (4)

1. F1. There will be no expiration date once restricted stock units vest.
2. F2. These remaining restricted stock units vest in two equal annual installments on 08/19/2027 and 08/19/2028.
3. F3. These restricted stock units vest in four equal annual installments beginning one year after the 05/13/2026 date of grant.
4. F4. Restricted stock units convert into common stock on a one-for-one basis.

Key Figures

RSUs converted: 767 units Shares issued from RSUs: 767 shares Shares withheld/delivered for exercise price or tax liability: 276 shares +3 more

6 metrics

RSUs converted 767 units Restricted Stock Units converted into Common Stock on 08/19/2026

Shares issued from RSUs 767 shares Common Stock, No Par Value, received upon RSU conversion

Shares withheld/delivered for exercise price or tax liability 276 shares Code F disposition related to RSU conversion

Price per share for code F shares $26.40 per share Applied to 276 shares delivered or withheld

Net shares from vesting 491 shares 767 shares issued minus 276 shares delivered or withheld

Remaining RSU underlying shares 1,255 shares Unvested RSUs remaining after the reported transaction

Key Terms

Restricted Stock Units, Exercise or conversion of derivative security, Payment of exercise price or tax liability by delivering or withholding securities

3 terms

Restricted Stock Units financial

"Shares issued for vesting of 8/19/2024 RSU grant"

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.

Exercise or conversion of derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

Payment of exercise price or tax liability by delivering or withholding securities financial

"transaction_code_description: Payment of exercise price or tax liability"

FAQ

What insider transaction did RBB (RBB) disclose for Diana Hanson?

RBB Bancorp disclosed that Chief Accounting Officer Diana Hanson had 767 RSUs convert into 767 shares of Common Stock on 08/19/2026, with a portion of those shares withheld or delivered to satisfy exercise price or tax obligations.

How many RBB (RBB) shares were withheld for taxes or exercise price in this Form 4?

The filing shows that 276 shares of RBB Bancorp Common Stock were delivered or withheld at a price of $26.40 per share in payment of exercise price or tax liability related to the RSU conversion.

How many RBB (RBB) shares did Diana Hanson effectively retain from the RSU vesting?

From the 767 shares issued upon RSU conversion and 276 shares delivered or withheld, Diana Hanson effectively retained 491 shares of RBB Bancorp Common Stock from this vesting event.

What RSU holdings remain for Diana Hanson at RBB (RBB) after this transaction?

The Form 4 shows remaining Restricted Stock Units representing 1,255 underlying shares of RBB Bancorp Common Stock, which continue to be held directly and will vest in future scheduled installments.

What is the conversion ratio for RBB Bancorp RSUs reported in this Form 4?

According to the footnotes, the reported Restricted Stock Units at RBB Bancorp convert into common stock on a one-for-one basis, meaning each RSU converts into one share of Common Stock upon vesting.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/21/2026 - 05:48 PM Accepted by SEC EDGAR 08/21/2026 - 05:47 PM Learn about SEC filing dates

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^*

Hanson Diana

(Last) (First) (Middle)

1055 WILSHIRE BLVD

SUITE 1200

(Street)

LOS ANGELES CALIFORNIA 90017

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
RBB Bancorp [ RBB ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026

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
Common Stock, No Par Value	08/19/2026		M		767	A	$0	1,259	D
Common Stock, No Par Value	08/19/2026		F		276	D	$26.4	983	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
Restricted Stock Units	(4)	08/19/2026		M			767	(2)	(1)	Common Stock	2,300	$0	1,533	D
Restricted Stock Units	(4)							(3)	(1)	Common Stock	1,255		1,255	D

Explanation of Responses:

1. There will be no expiration date once restricted stock units vest.

2. These remaining restricted stock units vest in two equal annual installments on 08/19/2027 and 08/19/2028.

3. These restricted stock units vest in four equal annual installments beginning one year after the 05/13/2026 date of grant.

4. Restricted stock units convert into common stock on a one-for-one basis.

Remarks:

Shares issued for vesting of 8/19/2024 RSU grant and shares disposed in settlement of tax withholding obligations for such RSU vesting.

	/s/ Diana Hanson	08/21/2026
	** 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)