Concord Acquisition Corp II names new CFO

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

Effective as of October

28, 2026, Michele Cito resigned as the Chief Financial Officer of Concord Acquisition Corp II (the "Company"), and effective as of the same date, the board of directors of the Company (the "Board") appointed Charles Coop to serve as the Chief Financial

Officer of the Company, to fill the vacancy created by Ms. Cito's resignation.

Charles Coop, age 34, serves as Vice President of Finance of Atlas Merchant Capital LLC ("Atlas"). Mr. Coop joined Atlas as Controller in June 2021 before becoming Vice President of Finance. Mr. Coop began his career at PricewaterhouseCoopers, where he served as a Manager in Assurance within the Banking and Capital Markets sector. Mr. Coop is a Certified Public Accountant and a CFA® charterholder. He received a Bachelor of Business Administration and a Master of Accounting from the University of Michigan.

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.

CONCORD ACQUISITION CORP Ii

By:

/s/ Jeff Tuder

Name:

Jeff Tuder

Title:

Chief Executive Officer

Date: November 3, 2026