STOCK TITAN

RBB Bancorp (RBB) director sells 10,000 shares after option exercise

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

RBB Bancorp director LIN CHUANG I reported an exercise-and-sell transaction in company stock. On May 7, 2026, the director exercised options for 10,000 shares of common stock at $18.25 per share and sold 10,000 shares in an open-market transaction at an average price of $24.2346 per share. After these transactions, the director directly holds 51,347 shares of common stock. The filing also shows 700 restricted stock units that are scheduled to vest on May 21, 2026, reflecting a remaining equity-based incentive position.

Positive

  • None.

Negative

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Insider LIN CHUANG I
Role null
Sold 10,000 shs ($242K)
Type Security Shares Price Value
Exercise Option (right to buy) 10,000 $18.25 $183K
Exercise Common Stock, No Par Value 10,000 $18.25 $183K
Sale Common Stock, No Par Value 10,000 $24.2346 $242K
holding Restricted Stock Units -- -- --
Holdings After Transaction: Option (right to buy) — 0 shares (Direct, null); Common Stock, No Par Value — 61,347 shares (Direct, null); Restricted Stock Units — 700 shares (Direct, null)
Footnotes (1)
  1. These options vested in three equal annual installments beginning one year after the 05/17/2016 date of grant. There will be no expiration date once restricted stock units vest. These remaining restricted stock units vest on 05/21/2026.
Shares sold 10,000 shares Open-market sale of common stock on May 7, 2026
Sale price $24.2346 per share Average sale price for 10,000 RBB Bancorp common shares
Option exercise price $18.25 per share Exercise price for 10,000 stock options converted on May 7, 2026
Shares after transactions 51,347 shares Director’s direct common stock holdings following reported activity
Remaining RSUs 700 units Restricted stock units scheduled to vest on May 21, 2026
Option grant date May 17, 2016 Original grant date for options exercised in three annual installments
Restricted Stock Units financial
"These remaining restricted stock units vest on 05/21/2026."
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.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
derivative security financial
"transaction_code_description": "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
exercise or conversion financial
"transaction_action": "derivative exercise/conversion""
net-sell financial
"netBuySellDirection": "net-sell""
SEC Form 4
FORM 4UNITED 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*
LIN CHUANG I

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock, No Par Value05/07/2026M10,000A$18.2561,347D
Common Stock, No Par Value05/07/2026S10,000D$24.234651,347D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Option (right to buy)$18.2505/07/2026M10,000 (1)05/17/2026Common Stock10,000$18.250D
Restricted Stock Units$0.0000 (3) (2)Restricted Stock Units700700D
Explanation of Responses:
1. These options vested in three equal annual installments beginning one year after the 05/17/2016 date of grant.
2. There will be no expiration date once restricted stock units vest.
3. These remaining restricted stock units vest on 05/21/2026.
Remarks:
To report a cashless exercise of 10,000 options and the sale of the issued shares.
/s/ Chuang-I Lin05/08/2026
** Signature of Reporting PersonDate
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 LIN CHUANG I report for RBB on this Form 4?

The director exercised options for 10,000 RBB Bancorp shares at $18.25 and sold 10,000 shares at $24.2346 on May 7, 2026. This combination is an exercise-and-sell transaction, converting an option position into cash while maintaining a substantial remaining shareholding.

How many RBB Bancorp shares does LIN CHUANG I hold after the reported transactions?

After the May 7, 2026 transactions, LIN CHUANG I directly holds 51,347 RBB Bancorp common shares. This figure reflects the position after exercising 10,000 options and selling 10,000 shares, indicating the director retains a sizable equity stake in the company following the activity.

At what prices did LIN CHUANG I exercise and sell RBB Bancorp shares?

The director exercised stock options at $18.25 per RBB Bancorp share and sold 10,000 common shares at an average price of $24.2346. The difference between the exercise price and sale price represents the gross spread on the exercised shares before any taxes or costs referenced elsewhere.

What happens to LIN CHUANG I’s restricted stock units in RBB after this Form 4?

The Form 4 shows 700 restricted stock units remaining for LIN CHUANG I, separate from common shares. According to the disclosure, these units vest on May 21, 2026, providing additional future equity-based compensation if service-based conditions continue to be satisfied through that vesting date.

How does this RBB Bancorp Form 4 classify the type of insider sale?

The Form 4 classifies the 10,000-share disposition as an open-market sale, coded “S.” This indicates the shares were sold in the market or a private transaction, rather than being withheld for taxes, gifted, or transferred back to the issuer under a non-market mechanism.

What option grant details are disclosed for LIN CHUANG I in this RBB filing?

The filing references options granted on May 17, 2016 that vested in three equal annual installments starting one year after grant. On May 7, 2026, 10,000 options with an $18.25 exercise price were exercised, and that derivative position now shows zero remaining shares after the exercise.