8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENTREPORT

PURSUANT TO SECTION 13 or 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): October 7, 2024

Chain Bridge Bancorp, Inc.

(Exact name of registrant as specified in its charter)

(703)-748-2005

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securitiesregistered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒

Item 8.01 Other Events.

On October 7, 2024, Chain Bridge Bancorp, Inc. (the “Registrant”) completed the sale of 1,850,000 shares of Class A common stock, par value $0.01 per share, of the Registrant (the “Class A Common Stock”), at a price to the public of $22.00 per share. The offering was registered pursuant to the Registrant’s registration statement on Form S-1 (File No. 333-282102), which the Securities and Exchange Commission declared effective on October 3, 2024.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.