6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of December, 2024

Commission File Number: 001-14475

TELEFÔNICA BRASIL S.A.****(Exact name of registrant as specified in its charter)

TELEFONICA BRAZIL S.A.   (Translation of registrant’s name into English)

**Av. Eng° Luís Carlos Berrini, 1376 -  28º andar****São Paulo, S.P.**Federative Republic of Brazil(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

TELEFÔNICA BRASIL S.A.

Publicly Held Company

CNPJ No. 02.558.157/0001-62 - NIRE 35.3.0015881-4

MATERIAL FACT

Telefônica Brasil S.A. (“Company”) (B3: VIVT3; NYSE: VIV), in the form and for the purposes of Article 157, Paragraph 4, of Law No. 6,404, of December 15^th^, 1976 (“Corporate Law”), as amended, and pursuant to CVM Resolution No. 44, of August 23^rd^, 2021, hereby informs its shareholders and the market in general that the Board of Directors’ approved, at a meeting held on this date, the cancellation of 21,944,664 common, book-entry and non-par value shares issued by the Company and held in treasury, which represents 1.33% of the capital stock, without reducing its value, which were acquired in the context of the Company’s Share Buyback Program.

As a result of the cancellation of shares approved, the Company’s capital stock is now divided into 1,630,643,696 common, book-entry and non-par value shares. Additionally, the Company informs that a Shareholder’s General Meeting will be convened in due course to adjust the number of shares that divide the capital stock defined in Article 5 of the Company’s Bylaws.

São Paulo, December 20^th^, 2024.

David Melcon Sanchez-Friera

CFO and Investor Relations Officer

Telefônica Brasil – Investor Relations

Tel: +55 11 3430-3687

Email: ir.br@telefonica.com

https://ri.telefonica.com.br/en

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, thereunto duly authorized.