Chain Bridge Bancorp (CBNA) Director Mark Martinelli Buys 400 Shares

What Happened

Mark Martinelli, a director of Chain Bridge Bancorp, purchased 400 shares of CHAIN BRIDGE BANCORP INC (CBNA) in an open-market transaction on July 29, 2026. The shares were acquired at $44.00 per share for a total cash outlay of $17,600. This was a cash purchase (transaction code P), which investors often view as more informative than routine insider sales.

Key Details

• Transaction date: 2026-07-29
• Transaction type: Open-market purchase (Code P)
• Price per share: $44.00
• Shares acquired: 400
• Total value: $17,600
• Filing date: 2026-07-31 (filed two days after the trade; generally within Form 4 timely-filing rules)
• Shares owned after transaction: Not specified in the provided filing excerpt
• Footnotes/plan: No 10b5-1 plan, tax-withholding, or other footnotes were reported in the provided data

Context

This was a straightforward open-market buy by a company director. Purchases by insiders can signal confidence, but they should be considered alongside other factors (size of the purchase, previous insider activity, company fundamentals). There is no indication this was an option exercise, gift, or part of a planned trading program in the provided filing.