TGS board OKs related-party gas reference prices

Transportadora de Gas del Sur S.A. reports that its Board of Directors approved gas reference prices for Spot purchases for Plant Thermal Reduction with related parties for the 2026 winter period.

Rhea-AI Filing Summary

Transportadora de Gas del Sur S.A. reports that its Board of Directors approved gas reference prices for Spot purchases for Plant Thermal Reduction with related parties for the 2026 winter period.

The Audit Committee reviewed these related-party transactions under section 72 of Capital Markets Act no. 26,831 and informed the Board that transactions carried out under these reference prices can be deemed reasonably entered into on an arm’s length basis. Accredited shareholders may request copies of the Audit Committee’s reports via the Company’s legal affairs email.

Key Figures

Board and Audit Committee date: April 22, 2026 Covered period: 2026 winter period

2 metrics

Board and Audit Committee date April 22, 2026 Date of Board approval and Audit Committee conclusion

Covered period 2026 winter period Applies to gas Spot purchases for Plant Thermal Reduction

Key Terms

Related Parties, arm’s length basis, Capital Markets Act no. 26,831, Audit Committee, +1 more

5 terms

Related Parties financial

"transactions with Related Parties carried out pursuant to and under the terms of the Reference Prices"

Related parties are people or organizations that have close ties to a company—such as owners, executives, family members, or other companies under common control—that can do business with it in ways a stranger would not. Investors care because deals between related parties can favor insiders, hide true costs or benefits, or mask risks; like a family agreeing on a price for a used car, these transactions may not reflect what an independent buyer would pay and can affect a company’s honesty about its finances.

arm’s length basis financial

"can be deemed to be reasonably entered into on an arm’s length basis"

Capital Markets Act no. 26,831 regulatory

"in compliance with section 72 of Capital Markets Act no. 26,831"

Audit Committee financial

"tgs Audit Committee was asked to issue a report in compliance with section 72"

A company's audit committee is a small group of board members who act like independent inspectors for the firm's finances, overseeing how financial reports are prepared, monitoring internal controls, and managing the relationship with external auditors. Investors care because a strong audit committee reduces the risk of accounting errors, fraud, or misleading statements, making financial statements more trustworthy and helping protect shareholder value.

Material Fact regulatory

"Re: Material Fact. Regular Transaction with Related Parties."

Information or an event that a reasonable investor would consider important when deciding to buy, sell or hold a security; it changes the expected value, risk, or outlook of an investment. Regulators treat material facts as disclosures that companies must share publicly because they can affect market prices, similar to a key ingredient in a recipe that determines the final taste. It matters to investors because material facts can change the basis for an investment decision and move trading activity and prices.

FAQ

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

What did TGS disclose in this Form 6-K filing?

Transportadora de Gas del Sur S.A. disclosed that its Board approved gas reference prices for Spot purchases for Plant Thermal Reduction with related parties for the 2026 winter period, after receiving an arm’s length opinion from its Audit Committee.

How did TGS handle related-party transactions in this notice?

The company submitted the pricing of related-party gas Spot purchases for Audit Committee review under section 72 of Capital Markets Act no. 26,831. The Audit Committee concluded these transactions can be deemed reasonably entered into on an arm’s length basis.

What period do TGS’s approved gas reference prices cover?

The approved gas reference prices cover Spot purchases for Plant Thermal Reduction during the 2026 winter period. This sets a pricing framework for transactions with related parties over that seasonal timeframe, as described in the company’s material fact communication.

What role did the TGS Audit Committee play in this decision?

The Audit Committee was asked to report on the related-party transactions in line with Capital Markets Act no. 26,831. On April 22, 2026, it informed the Board that transactions under the approved reference prices can be considered reasonably entered into on an arm’s length basis.

Can TGS shareholders access the Audit Committee’s reports?

Yes. The company states that Audit Committee reports regarding these related-party transactions are available for consultation by accredited shareholders. Access is provided upon request via email to the company’s legal affairs address indicated in the communication.

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

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Accepted by SEC EDGAR 04/22/2026 - 05:52 PM EDT Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

_____________

FORM 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities and Exchange Act of 1934

For April 22, 2026

Commission file number: 1-13.396

Transportadora de Gas del Sur S.A.

Cecilia Grierson 355, piso 26

(1107), Capital Federal

Argentina

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  X  Form 40-F   

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

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

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

Yes   No X  

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

City of Buenos Aires, April 22, 2026.

E-NOTA-20260422-62126

Messrs.

Comisión Nacional de Valores (Argentine Securities and Exchange Commission)

Bolsas y Mercados Argentinos S.A. (Argentine Stock Exchanges and Markets)

Bolsa de Comercio de Buenos Aires (Buenos Aires Stock Exchange)

Gerencia Técnica y de Valores Negociables (Technical and Negotiable Securities Management)

A3 Mercados S.A. (A3 Markets)

Re: Material Fact. Regular Transaction with Related Parties. Section 72 Act no. 26,831.

Dear Sirs,

I am writing to you in my capacity as Head of Market Relations of Transportadora de Gas del Sur S.A. (“tgs” or the “Company”), in order to report that in its meeting held today, the Board of Directors approved the gas reference prices for Spot purchases for Plant Thermal Reduction with Related Parties for the 2026 winter period (the “Reference Prices”).

Prior to approval of the Reference Prices, tgs Audit Committee was asked to issue a report in compliance with section 72 of Capital Markets Act no. 26,831.

On April 22, 2026, the Audit Committee concluded and informed the Board of Directors that the transactions with Related Parties carried out pursuant to and under the terms of the Reference Prices can be deemed to be reasonably entered into on an arm’s length basis.

The Audit Committee’s reports are available for consultation by accredited shareholders if so desired, upon request via email at: direcciondelegales@tgs.com.ar.

Yours sincerely

Hernán Diego Flores Gómez

Head of Market Relations 

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.

Transportadora de Gas del Sur S.A.

By:	/s/Alejandro M. Basso
Name:	Alejandro M. Basso
Title:	Chief Financial Officer and Services Vice President

By:	/s/Hernán D. Flores Gómez
Name:	Hernán Diego Flores Gómez
Title:	Legal Affairs Vice President

Date: April 22, 2026.