James Kao - 21 May 2026 Form 4 Insider Report for RBB Bancorp (RBB)

Reporting relationship: Director
Issuer ticker: RBB
Reported as of: 21 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 May 2026, 20:15:13 UTC
Prior SEC filing: 22 May 2025
Source filing: View source filing
Reporting owner signature: /s/ James Kao

Key filing fact

James Kao filed Form 4 for RBB Bancorp (RBB) on 26 May 2026.

Key facts

This page summarizes James Kao's Form 4 filing for RBB Bancorp (RBB).
5 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 26 May 2026, 20:15.

Change

Previous filing in this sequence was filed on 22 May 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001711522 Primary reporting owner

Kao James

Relationship: Director
Address: 1055 WILSHIRE BLVD, SUITE 1200, LOS ANGELES
Signature: /s/ James Kao
Signature date: 26 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RBB transaction

Common Stock, No Par Value

Options Exercise

Transaction value
Shares: +700
Change %: +0.12%
Price: $0.000000^*
Shares after: 564,762
Date: 21 May 2026
Ownership: Direct

RBB transaction

Common Stock, No Par Value

Options Exercise

Transaction value
Shares: +1,962
Change %: +0.35%
Price: $0.000000^*
Shares after: 566,724
Date: 21 May 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RBB transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -700
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 21 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 700
Exercise price
Footnotes: F1, F2

RBB transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +2,662
Change %
Price: $0.000000^*
Shares after: 2,662
Date: 21 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,662
Exercise price
Footnotes: F1, F3

RBB transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -1,962
Change %: -74%
Price: $0.000000^*
Shares after: 700
Date: 21 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,962
Exercise price
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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

Footnote F2

On May 21, 2025, the reporting person was granted 5,242 restricted stock units: 4,542 immediately vested and 700 vested on the one year anniversary of the grant date.

Footnote F3

On May 21, 2026, the reporting person was granted 2,662 restricted stock units: 1,962 vested immediately and 700 will vest on the one year anniversary of the grant date.