Central Puerto buys back 100,000 shares for AR$195M

The September 29 acquisitions did not exceed 25% of average daily trading volume over the prior 90 business days.

Rhea-AI Filing Summary

Central Puerto S.A. (CEPU) and its wholly owned subsidiary Proener S.A.U. acquired the company’s treasury shares in transactions dated September 29, 2026, with trade completion dated September 30, 2026. On BYMA, Central Puerto acquired 100,000 shares at an average AR$1,951.31 per share, for a total cash amount of AR$195,131,950. On NYSE, Proener acquired 20,000 shares at an average US$12.02 per ADR, for a total cash amount of US$240,540.52.

Central Puerto corrected figures previously reported for Proener in a September 28, 2026 relevant event: the corrected average share price was US$12.22 and the corrected total amount was US$244,595.20, a stated US$200 difference from the originally reported figures. The company stated that the same-day acquisitions did not exceed 25% of average daily trading volume over the previous 90 business days.

Key Figures

Central Puerto shares acquired: 100,000 shares Central Puerto average price: AR$1,951.31 per share Central Puerto total cash amount: AR$195,131,950 +5 more

8 metrics

Central Puerto shares acquired 100,000 shares Transaction dated September 29, 2026; BYMA

Central Puerto average price AR$1,951.31 per share Transaction dated September 29, 2026; BYMA

Central Puerto total cash amount AR$195,131,950 Transaction dated September 29, 2026; BYMA

Proener shares acquired 20,000 shares Transaction dated September 29, 2026; NYSE

Proener average price US$12.02 per ADR Transaction dated September 29, 2026; NYSE

Proener total cash amount US$240,540.52 Transaction dated September 29, 2026; NYSE

Corrected average share price US$12.22 Corrected figure for Proener in the relevant event filed September 28, 2026

Corrected total transaction amount US$244,595.20 Corrected figure for Proener in the relevant event filed September 28, 2026

Key Terms

treasury shares, book-entry ordinary shares, average daily trading volume, ADR

4 terms

treasury shares financial

"acquired treasury shares issued by the Company"

Treasury shares are a company’s own stock that it has repurchased and keeps on its books instead of canceling or leaving in the hands of outside investors. Think of them like coupons a business puts back in a drawer: they don’t vote or receive dividends while held, but they can be reissued later for employee pay or fundraising. For investors this matters because buybacks change the number of shares that count toward earnings and ownership, can boost per‑share metrics, and use corporate cash that might otherwise go to growth or dividends.

book-entry ordinary shares financial

"own book-entry ordinary shares"

average daily trading volume financial

"25% of the average daily trading volume"

The average daily trading volume is the typical number of shares or units of a security that change hands each trading day, calculated over a set period. It tells investors how active a market is—like average traffic on a road—so higher volume usually means easier, faster trades and smaller price swings when buying or selling, while low volume can make orders harder to fill and cause bigger price moves.

ADR financial

"12.02 US$/ADR"

An American Depositary Receipt (ADR) is a financial certificate that lets investors buy shares of a foreign company through U.S. stock markets, similar to buying a local wrapper that represents the underlying foreign shares. ADRs matter because they make investing in overseas companies easier and more liquid by trading in U.S. dollars and under U.S. market rules, while still carrying currency, regulatory, and country-specific risks that can affect share value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did CEPU and Proener acquire?

Central Puerto acquired 100,000 shares on BYMA at an average AR$1,951.31 per share, for a total cash amount of AR$195,131,950. Proener acquired 20,000 shares on NYSE at an average US$12.02 per ADR, for a total cash amount of US$240,540.52. The transactions were dated September 29, 2026, and completed September 30, 2026.

What figures did CEPU correct for Proener’s September 28 report?

Central Puerto corrected Proener’s average share price to US$12.22 and the total transaction amount to US$244,595.20. The company stated these corrected figures differed by US$200 from those originally reported.

What trading-volume limit applied to CEPU’s share acquisitions?

The same-day acquisitions did not exceed 25% of the average daily trading volume of Central Puerto shares during the previous 90 business days.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/30/2026 - 10:30 AM Accepted by SEC EDGAR 09/30/2026 - 10:30 AM Learn about SEC filing dates

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 September, 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’s name 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, September 29, 2026

COMISIÓN NACIONAL DE VALORES (“CNV”)
Issuing Companies deputy management
25 de Mayo 175
Buenos Aires City
Attn.: Management of Issuing Companies
Present

BOLSAS Y MERCADOS ARGENTINOS S.A. (“BYMA”)
Sarmiento 299
Buenos Aires City
Present

MERCADO ABIERTO ELECTRÓNICO (“MAE”)
San Martin 344
Buenos Aires City
Present

Ref.: Relevant Event

Dear Sirs:

I am pleased to address you in my capacity as the Principal Officer in Charge of Investor Relations of Central Puerto S.A. (the “Company” or “CPSA,” as applicable), in compliance with the provisions of Article 11, Section II, Chapter I, Title II of the Rules of the Comisión Nacional de Valores (N.T. 2013), in order to inform you that the Company and Proener S.A.U. (“Proener”), a wholly owned subsidiary of CPSA, have acquired treasury shares issued by the Company pursuant to the terms of Article 64 et seq. of Capital Markets Law No. 26,831 and the regulations of the Comisión Nacional de Valores.

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

Entity	Market	Transaction Date	Trade completion Date	Number of Shares	Equivalent Number of Shares	Average Price	Total Cash Amount
CPSA	BYMA	09/29/2026	09/30/2026	100,000	100,000	1,951.31 AR$/Share	AR$ 195,131,950
Proener	NYSE	09/29/2026	09/30/2026	20,000	20,000	12.02 US$/ADR	US$ 240,540.52

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

In the Relevant Event filed on 09/28/2026, the average acquisition price and the total amount of the transaction by Proener were erroneously reported; consequently, the correct figures reflect a difference of USD 200 from those originally reported. The average share price was USD 12.22 and the total amount was USD 244,595.20.

Yours sincerely,

Leonardo Marinaro

Head of Market Relations

Central Puerto S.A.

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

Teléfono (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.

				Central Puerto S.A.
Date: September 30, 2026				By:		/s/ Leonardo Marinaro
				Name:		Leonardo Marinaro
				Title:		Attorney-in-Fact