TGS signs major Integrated NGLs Project deals

Transportadora de Gas del Sur S.A.

Rhea-AI Filing Summary

Transportadora de Gas del Sur S.A. (tgs) announced the execution of commercial agreements for its Integrated NGLs Project with YPF, Pluspetrol entities and Chevron Argentina. The project will be developed through subsidiaries Procesadora de Gas del Sur (PGS) and Midstream de Gas del Sur (MGS), incorporated as single project vehicles under Argentina’s Incentive Regime for Large Investments.

PGS will build and operate an approximately 100 km gas segregation pipeline and a processing plant in Tratayén, Neuquén, with estimated capacity of 43 MMm³/d and investment of US$ 1.1 billion. MGS will build and operate an approximately 577 km liquids pipeline, fractionation plant and storage facilities with a marine terminal in Puerto Galván, Bahía Blanca, involving an estimated US$ 1.9 billion and enabling around US$ 1.2 billion per year of exports.

The company states that this initiative is key to easing constraints on the development of Vaca Muerta, supporting higher crude oil production and conditioning associated gas for transportation through trunk and export gas pipelines.

Insights

Energy infrastructure analyst

tgs advances a multi‑billion‑dollar NGL export corridor linked to Vaca Muerta.

The announcement describes binding commercial agreements for the Integrated NGLs Project, connecting Vaca Muerta gas production to export markets. PGS will handle upstream gas segregation and processing, while MGS develops long‑haul liquids transport, fractionation and port infrastructure.

The disclosed figures are sizable: PGS investment of US$ 1.1 billion, MGS investment of US$ 1.9 billion, and expected exports of about US$ 1.2 billion per year. These numbers suggest a strategically important midstream expansion, though the text does not detail financing, returns or execution timetable.

The company highlights alleviating constraints on Vaca Muerta development, enabling more crude oil production and conditioning associated gas for trunk and export pipelines. Subsequent disclosures in future reports will be needed to clarify project phasing, contracting structure and how these investments affect tgs’s balance sheet and cash flows.

Key Figures

PGS investment: US$ 1.1 billion MGS investment: US$ 1.9 billion Expected exports: US$ 1.2 billion per year +3 more

6 metrics

PGS investment US$ 1.1 billion Estimated investment for Tratayén gas pipeline and processing plant

MGS investment US$ 1.9 billion Estimated investment for liquids pipeline, fractionation and terminal

Expected exports US$ 1.2 billion per year Estimated annual exports enabled by Integrated NGLs Project

PGS pipeline length approximately 100 km Gas segregation pipeline to Tratayén, Neuquén

MGS liquids pipeline length approximately 577 km Liquids pipeline to Puerto Galván, Bahía Blanca

Gas processing capacity 43 MMm³/d Estimated capacity of PGS processing plant in Tratayén

Key Terms

Integrated NGLs Project, Incentive Regime for Large Investments (RIGI), Single Project Vehicles, fractionation plant, +1 more

5 terms

Integrated NGLs Project financial

"the commercial agreements of the Integrated NGLs Project (the “NGLs Project”) were executed"

Incentive Regime for Large Investments (RIGI) financial

"incorporated as Single Project Vehicles under the Incentive Regime for Large Investments (RIGI, for its Spanish acronym)"

Single Project Vehicles financial

"the latter companies incorporated as Single Project Vehicles under the Incentive Regime"

fractionation plant technical

"a fractionation plant and storage facilities with a marine terminal in Puerto Galván"

Vaca Muerta technical

"one of the main constraints that could limit the development of Vaca Muerta"

Vaca Muerta is a vast underground shale rock formation in Argentina that holds large amounts of oil and natural gas trapped in tight rock layers. For investors, it matters because turning those trapped resources into sellable fuel requires large upfront investment, specialized drilling and pipelines, and favorable permits and prices; if developed successfully it can boost energy production and company value, but it also carries long timelines and political and operational risks.

FAQ

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

What project did Transportadora de Gas del Sur (TGS) announce in the June 2026 6-K?

Transportadora de Gas del Sur announced commercial agreements for its Integrated NGLs Project. The project links Vaca Muerta’s gas production to export markets through new pipelines, processing, fractionation and export facilities developed by its subsidiaries PGS and MGS.

Which companies are counterparties to TGS in the Integrated NGLs Project agreements?

The counterparties are YPF S.A., Pluspetrol S.A., Pluspetrol Cuenca Neuquina S.R.L., and Chevron Argentina S.R.L. These producers will use the new midstream infrastructure to handle gas and liquids from Vaca Muerta under the commercial agreements signed with TGS and its subsidiaries.

What investments are planned for the PGS portion of TGS’s Integrated NGLs Project?

PGS plans to invest about US$ 1.1 billion in an approximately 100 km gas pipeline and a processing plant in Tratayén, Neuquén. The plant is designed for an estimated capacity of 43 MMm³/d, handling gas streams from Vaca Muerta production.

How much will TGS invest through MGS and what will this infrastructure include?

MGS expects to invest about US$ 1.9 billion in an approximately 577 km liquids pipeline, a fractionation plant and storage facilities with a marine terminal in Puerto Galván, Bahía Blanca. This infrastructure will support large‑scale processing and export of NGLs.

What export capacity is expected from TGS’s Integrated NGLs Project?

The Integrated NGLs Project is expected to enable approximately US$ 1.2 billion per year in exports. This export potential reflects the new liquids pipeline, fractionation and marine terminal capacity designed to handle NGL volumes derived from Vaca Muerta gas.

Why does TGS describe the Integrated NGLs Project as key for Vaca Muerta?

TGS states the project is key because it addresses constraints that could limit Vaca Muerta’s development. It is intended to support increased crude oil output and properly condition associated gas for transportation through Argentina’s trunk and export gas pipelines.

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

Form 6-K: How Foreign Companies Report to the SEC →

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Accepted by SEC EDGAR 06/10/2026 - 06:21 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 June 10, 2026

Commission file number: 1-13.396

Transportadora de Gas del Sur S.A.

Cecilia Grierson 355, Twenty sixth Floor

(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, June 10, 2026.

E-NOTA-20260610-62658

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. Section 3, Chapter I, Title XII of the Rules of the Argentine Securities and Exchange Commission. Integrated NGLs Project — Execution of Commercial Agreements.

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 inform you that, on the date hereof, the commercial agreements of the Integrated NGLs Project (the “NGLs Project”) were executed, the counterparties of which are YPF S.A., Pluspetrol S.A., Pluspetrol Cuenca Neuquina S.R.L. and Chevron Argentina S.R.L.

The NGLs Project is being developed by tgs and its subsidiaries Procesadora de Gas del Sur S.A. (“PGS”) and Midstream de Gas del Sur S.A. (“MGS”), the latter companies incorporated as Single Project Vehicles under the Incentive Regime for Large Investments (RIGI, for its Spanish acronym). PGS will be responsible for the construction and operation of an approximately 100 km pipeline for the segregation of gas streams, and a processing plant in Tratayén, Province of Neuquén, with an estimated capacity of 43 MMm³/d and an estimated investment of US$ 1.1 billion. MGS will be responsible for the construction and operation of an approximately 577 km liquids pipeline, a fractionation plant and storage facilities with a marine terminal in Puerto Galván, City of Bahía Blanca, Province of Buenos Aires, with an estimated investment of US$ 1.9 billion; which will enable exports of approximately US$ 1.2 billion per year.

This initiative is key to addressing one of the main constraints that could limit the development of Vaca Muerta and to consolidating the country’s export growth. In particular, it will enable the increase in crude oil production and the conditioning of associated gas for its transportation through trunk and export gas pipelines.

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: June 10, 2026.