6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 27a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of March, 2026

Commission File Number: 001-38376

Central Puerto S.A.

(Exact name of registrant as specified in its charter)

Port Central S.A.

(Translation of registrant’sname into English)

Avenida Thomas Edison 2701

C1104BAB Buenos Aires

Republic of Argentina

+54 (11) 4317-5000

(Address of principal executive offices)

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

Form 20-F [X] 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 [X]

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 [X]

BUENOS AIRES, March 5, 2026 Notice: CPSA-GG-N-0087/26-AL

COMISIÓN NACIONAL DE VALORES (“CNV”)

Deputy Management of Issuing Companies

To Management of Issuing Companies

25 de Mayo 175

City of Buenos Aires

BOLSAS Y MERCADOS ARGENTINOS S.A. (“BYMA”)

Sarmiento 299

City of Buenos Aires

MERCADO ABIERTO ELECTRÓNICO (“MAE”)

San Martin 344

City of Buenos Aires

Subject: Material News - Meeting call

Dear Mr./Mrs.,

It is a pleasure to contact you in my capacity as Head of Market Relations of Central Puerto S.A. (the “Company”) so as to inform you that the Company’s Board of Directors decided to call an Ordinary General Meeting for April 30, 2026 at 11 a.m. on first call and at 12 p.m. on second call should the Meeting on first call fail to be held. The Meeting shall be held remotely.

Yours<br>sincerely,

Avda. Tomás A. Edison 2701 – C1104BAB – City of Buenos Aires – Argentina Telephone (54 11) 4317 5000 – Fax (54 11) 4317 5099

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.