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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
\nPursuant to Rule 27a-16 or 15d-16
\nunder the Securities Exchange Act of 1934

For the month of October, 2026

Commission File Number: 001-38376

Central Puerto S.A.

(Exact name of registrant as specified in its charter)\n

Port Central S.A.

(Translation of registrant’s\nname 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\nwill file annual reports under cover Form 20-F or Form 40-F.

Form\n20-F [X] Form 40-F [_]

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

Yes\n[_] No [X]

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

Yes\n[_] No [X]

$\"\"$

BUENOS\nAIRES, October 20, 2026

COMISIÓN NACIONAL DE VALORES (“CNV”)
\nIssuing Companies deputy management
\n25 de Mayo 175
\nBuenos Aires City
\nAttn.: Management of Issuing Companies
\nPresent

BOLSAS Y MERCADOS ARGENTINOS S.A. (“BYMA”)
\nSarmiento 299
\nBuenos Aires City
\nPresent

MERCADO ABIERTO ELECTRÓNICO (“MAE”)
\nSan Martin 344
\nBuenos Aires City
\nPresent

Ref.: Relevant Event

Dear Sirs:

I am pleased\nto address you in my capacity as the Principal Officer in Charge of Investor Relations of Central Puerto S.A. (the “Company”\nor “CPSA,” as applicable), in compliance with the provisions of Article 11, Section II, Chapter I, Title II of the Rules of\nthe Comisión Nacional de Valores (N.T. 2013), in order to inform you that the Company and Proener S.A.U. (“Proener”),\na wholly owned subsidiary of CPSA, have acquired treasury shares issued by the Company pursuant to the terms of Article 64 et seq. of\nCapital Markets Law No. 26,831 and the regulations of the Comisión Nacional de Valores.

In this regard,\nwe hereby inform you that both the Company and Proener have acquired their own book-entry ordinary shares, with a par value of $1 (one\nPeso) and carrying 1 (one) vote per share (the “Shares”), as set forth below:

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

Entity

Market

Transaction Date

Trade completion Date

Number of Shares / ADRs

Equivalent Number of Shares

Average Price

Total

Cash

Amount

CPSA

BYMA

10/20/2026

10/21/2026

120,000

AR$ 2,005.72

AR$ 240,686,812

NYSE

Furthermore, please be advised\nthat the acquisitions made on the same day did not exceed 25% of the average daily trading volume of the Company’s shares during\nthe previous ninety (90) business days.

Yours sincerely,

Leonardo Marinaro

Head of Market Relations

Central Puerto S.A.

Avda. Tomás A.\nEdison 2701 – C1104BAB – Ciudad de Buenos Aires – Argentina

Teléfono (54\n11) 4317 5000 – Fax (54 11) 4317 5099

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act\nof 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

","zhKind","complete","CEPU","政策与监管","回购","退市","停复牌","NYSE","aihot","/items/lk70t6ue860azoanvp93459u6","https://www.sec.gov/Archives/edgar/data/1717161/000129281426004958/0001292814-26-004958-index.htm","rss-sec-xbrl","name","SEC · EDGAR 财务披露","kind","rss","firstParty","iconUrl","/api/img-proxy?u=https%3A%2F%2Fwww.sec.gov%2Fthemes%2Fcustom%2Fuswds_sec%2Fassets%2Fimg%2Ffavicons%2Fapple-touch-icon.png&mode=avatar&exp=1792800000&sig=a1281a539589308a","iconSrcSet","/api/img-proxy?u=https%3A%2F%2Fwww.sec.gov%2Fthemes%2Fcustom%2Fuswds_sec%2Fassets%2Fimg%2Ffavicons%2Fapple-touch-icon.png&mode=avatar-48&exp=1792800000&sig=57a86ea6a382db0f 48w, /api/img-proxy?u=https%3A%2F%2Fwww.sec.gov%2Fthemes%2Fcustom%2Fuswds_sec%2Fassets%2Fimg%2Ffavicons%2Fapple-touch-icon.png&mode=avatar-96&exp=1792800000&sig=f9807010575fb678 96w","changelogVersion","2026-10-01T08:00"]

Central Puerto S.A.

Date: October 20, 2026

\n
/s/ Leonardo\n Marinaro

Leonardo Marinaro

Attorney-in-Fact