BBAR 6-K

FORM 6-K

SECURITIES ANDEXCHANGE COMMISSION

Washington,D.C. 20549

Report of ForeignIssuer

Pursuant to Rule13a-16 or 15d-16 of the Securities Exchange Act of 1934

For the month of April 2026

Commission File Number: 001-12568

BBVA Argentina Bank S.A.

(Translation of registrant’s name into English)

111 CórdobaAv, C1054AAA

Buenos Aires, Argentina

(Address of principal executive offices)

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

Form 20-F ☒           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):

Yes ☐           No ☒

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):

Yes  ☐           No ☒

Indicate by check mark whether by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934:

Yes  ☐           No ☒

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A

BBVA Argentina Bank S.A.

TABLE OF CONTENTS

Item

MaterialEvent

Classaction filed by ACYMA -

“AsociaciónCivil por los Consumidores y el Medio Ambiente (ACYMA) vs/ Banco BBVA Argentina S.A.- Ordinary proceeding " (File 15.087/2024), pendingbefore the First Instance Court on Commercial Matters Nro 27 Secretariat Nro. 53 Ciudad Autónoma de Buenos Aires.”.

Ciudad Autónoma de Buenos Aires, April 1st 2026

Securities and Exchange Commission

RE: “Asociación Civil porlos Consumidores y el Medio Ambiente (ACYMA) vs. Banco BBVA Argentina S.A.- Ordinary proceeding " (File 15.087/2024), pending beforethe First Instance Court on Commercial Matters Nro 27 Secretariat Nro. 53 Ciudad Autónoma de Buenos Aires.”

With due consideration:

We hereby address you in order to inform that Banco BBVA Argentina S.A. (hereinafter “BBVA”) has been notified of a class action filed by ACYMA – Asociación Civil por los Consumidores y el Medio Ambiente.

The purpose of the complaint is to defend consumers and users - physical persons - who have made purchases in a foreign currency other than the US dollar, abroad and or in the country paying with credit cards issued by the Bank and whose amount was converted into dollars at the time of its settlement. Such transaction was carried out without reporting the exchange rate used for said conversion and with an assumed overcharge or commission.

It is important to remark that this action is informed even though it is materially impossible to determine to date, whether the claim has a significant economic importance, since such claim is brought for an indeterminate amount, materially impossible to be determined with certainty today.

The Bank is analyzing the content of the lawsuit and defining the course of action, thus considering that even in the hypothetical case of an adverse decision regarding this dispute, such circumstance will not have a significant impact on its assets and activities.

Yours faithfully,

BANCO BBVA ARGENTINA S.A.

Eduardo González Correas

Head of Market Relations.

Av. Córdoba 111, piso 31 (C1054AAA) Ciudad Autónoma de Buenos Aires, Argentina

IGJ 21-07-21 N° 11.156 L.103 T SA (T.O)

SIGNATURES

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.