ENELTXCH Shares Exchange for December 9, 2022

Dear Participants,

DCV Registros informs that SOCIEDAD TRANSMISORA METROPOLITANA SpA ("STM") and MARECO HOLDINGS CORP ("Mareco," and jointly with STM, the "Offerors," each one the "Offeror") offered to buy all the shares of ENEL TRANSMISIÓN CHILE S.A., a Corporation registered in the Securities Register under number 1195 (the "Corporation"), subject to the condition that at least, 1,140,279,406 shares, representing approximately 99.09% of the shares in which the capital of ENEL TRANSMISIÓN CHILE S.A. is currently divided, are offered to the Offerors (the "Offer's Minimum Threshold").

The process started on November 7 and
ends on December 6, 2022.

ENELTXCH SHARES EXCHANGE

According to the amendment of the bylaws and the shares exchange, it is stated that subject to the compliance of the conditions of success of the offer, a condition which has already been met, and to the publication of notice with the outcome of the offer, on the third business day after the completion of the tender offer, from the Offerors, the shares exchange will take place according to what is defined in the amendment of statutes of the Corporation agreed in the extraordinary Shareholders' Meeting of October 27, 2022, according to which each share currently issued by the Corporation will be exchanged automatically with a new Series A share and 99,999 new Series B shares. Once the shares exchange has been verified, the shares acquired in the offer will be assigned to the offerors on the date of the publication of the notice of the outcome, on December 9, 2022. Such shares will be in the "exchanged" status in DCV's shareholders' register on the morning of December 9, 2022.

According to the amendment of the bylaws, Series A will be comprised of 1,150,742,161 new Series A shares, which will have the same rights as the current shares of the Corporation. Series B will comprise 115,073,065,357,839 new Series B shares, which will have a preference to call shareholders' meetings and have limited voting rights in the sense that they will not be considered in the election of the Corporation's Board of Directors. However, they have full voting rights for all other issues.

SERIES A & B

If the offer is deemed successful by the offerors, the negotiation and trade of the shares of ENELTXCH will be made separately from December 9, 2022, according to the new series A and B, under the instrument identifiers defined by the issuer, "STMCHA" and "STMCHB," respectively.

For more information, please contact
the Shareholders' Service Department.

Kind regards,
DEPÓSITO CENTRAL DE VALORES S.A.,
DEPÓSITO DE VALORES