Chuang I. Lin - 07 May 2026 Form 4 Insider Report for RBB Bancorp (RBB)

Reporting relationship: Director
Issuer ticker: RBB
Reported as of: 07 May 2026
Net transaction value: -$242,346
SEC form: 4
Accepted by SEC: 08 May 2026, 16:18:19 UTC
Prior SEC filing: 22 May 2025
Next SEC filing: 26 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Chuang-I Lin

Key filing fact

Chuang I. Lin filed Form 4 for RBB Bancorp (RBB) on 08 May 2026.

Key facts

This page summarizes Chuang I. Lin's Form 4 filing for RBB Bancorp (RBB).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 08 May 2026, 16:18.

Change

Previous filing in this sequence was filed on 22 May 2025.
Current net transaction value: -$242,346.

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 0001185981 Primary reporting owner

LIN CHUANG I

Relationship: Director
Address: 1055 WILSHIRE BLVD, SUITE 1200, LOS ANGELES
Signature: /s/ Chuang-I Lin
Signature date: 08 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: +10,000
Change %: +19%
Price: $18.25^*
Shares after: 61,347
Date: 07 May 2026
Ownership: Direct

RBB transaction

Common Stock, No Par Value

Sale

Transaction value: $242,346
Shares: -10,000
Change %: -16%
Price: $24.23
Shares after: 51,347
Date: 07 May 2026
Ownership: Direct

Reported derivative securities

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

RBB transaction Derivative

Option (right to buy)

Options Exercise

Transaction value
Shares: -10,000
Change %: -100%
Price: $18.25^*
Shares after: 0
Date: 07 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,000
Exercise price: $18.25
Footnotes: F1

RBB holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 700
Date: 07 May 2026
Ownership: Direct
Underlying class: Restricted Stock Units
Underlying amount: 700
Exercise price: $0.000000
Footnotes: F2, 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

These options vested in three equal annual installments beginning one year after the 05/17/2016 date of grant.

Footnote F2

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

Footnote F3

These remaining restricted stock units vest on 05/21/2026.

SEC remarks

To report a cashless exercise of 10,000 options and the sale of the issued shares.