LIN CHUANG I 4

What Happened

• Lin Chuang, a director of RBB Bancorp (ticker: RBB), had 700 restricted stock units (RSUs) vest and convert into 700 shares on May 21, 2026 (transaction code M — exercise/conversion of a derivative). The Form 4 reports 700 shares acquired at $0.00 and 700 shares disposed at $0.00. No cash proceeds or market sale price are reported in the filing excerpt.
• This is not a purchase — it’s a conversion/vesting event. The simultaneous acquisition and disposition of the same number of shares is commonly how RSU vesting and any net-share settlement or withholding for taxes is recorded, but the filing itself does not state the exact reason for the disposal.

Key Details

• Transaction date: May 21, 2026. Filing date: May 26, 2026 (5 days after the transaction — appears to be a late Form 4 filing).
• Reported amounts: 700 shares acquired @ $0.00; 700 shares disposed @ $0.00 (both recorded under derivative conversion/exercise code M).
• Shares owned after transaction: Not specified in the provided excerpt — see the full Form 4 for total post-transaction holdings.
• Footnotes:
  • F1: RSUs convert into common stock on a one-for-one basis.
  • F2: On May 21, 2025 the reporting person was granted 3,221 RSUs: 2,521 vested immediately and 700 vested on the one-year anniversary (the 700 that vested on 5/21/2026).
• Filing timeliness: The Form 4 was filed five days after the reported transaction date (Form 4s are typically due within two business days), so this appears to be a late filing.

Context

• For retail investors: this looks like a routine RSU vesting/settlement rather than an open-market purchase or a cash sale. Because the disposal shows $0.00 consideration, it likely reflects internal share conversion and possible withholding/net-share settlement rather than a public sale generating proceeds. The filing contains no pricing or proceeds information that would indicate a market transaction.
• Lin Chuang is a director (not necessarily a 10% owner); such vesting events are common compensation mechanics and do not, by themselves, indicate a change in sentiment about the company.