Information from Bci to its shareholders. Corporate Development Process

Dear Bci Shareholder,

In January of this year, Bci announced a corporate transformation process aimed at a new strategic horizon, designed to enable greater growth potential in its markets and unlock value for its shareholders. This process has been progressing according to our plan, and as the next step, we expect to issue an invitation to shareholders toward the end of the year to transfer their shares to Bci Group. This transfer will be structured on a 1-to-1 basis (one Bci share for one Bci Group share), so that shareholders’ percentage ownership will remain unchanged.

In an effort to maximize and facilitate the migration of shareholders to Bci Group, the migration process includes the following mechanisms (which are complementary, not mutually exclusive):

1. Public Tender Offer (PTO): We estimate that the process would begin in December and end in January 2027.
2. Direct Exchange Process Following the Tender Offer (Subscription and direct payment for Bci Group’s initial public offering shares through the contribution of Bci shares on a 1:1 basis): We estimate that the process would begin in January and end in February 2027.

Since each shareholder’s circumstances regarding their shares may vary, we recommend that you evaluate your specific situation with your own advisors to determine the option (or combination of options) that best suits your particular circumstances. Shareholders are also strongly advised to take the necessary steps to ensure they are eligible to participate in the share exchange processes expected to begin in the coming months (such as lifting any liens or other restrictions that may affect the Bci shares contributed or transferred to Bci Group, which must be free of encumbrances, prohibitions, or other restrictions, as well as keeping their information, powers of attorney, and other records up to date with DCV Registros).

You can access official information about the process at www.bci.cl/investor-relations and on the new Bci Group website, www.bcigroup.cl, where such information is published in a timely manner. In addition, our Investor Relations team is available to address your questions via email at [email protected].