# EDGAR Filing Document

**Accession Number:** 0000931427
**File Stem:** 0000931427-26-000003
**Filing Date:** 2026-4
**Character Count:** 5020
**Document Hash:** 3e9cd3f8efe940d768c098c01fe87957
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000931427-26-000003.hdr.sgml**: 20260423

**ACCESSION NUMBER**: 0000931427-26-000003

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260422

**FILED AS OF DATE**: 20260423

**DATE AS OF CHANGE**: 20260422

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GAS TRANSPORTER OF THE SOUTH INC
- **CENTRAL INDEX KEY:** 0000931427
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS TRANSMISSION [4922]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13396
- **FILM NUMBER:** 26884900

**BUSINESS ADDRESS:**
- **STREET 1:** CECILIA GRIERSON 355 26TH FLR
- **STREET 2:** 1107 CAPITAL FEDERAL
- **CITY:** ARGENTINA
- **STATE:** C1
- **ZIP:** 00000
- **BUSINESS PHONE:** 005401137515100X1093

**MAIL ADDRESS:**
- **STREET 1:** CECILIA GRIERSON 355 26TH FLR
- **STREET 2:** CAPITAL FEDERAL
- **CITY:** ARGENTINA
- **STATE:** C1
- **ZIP:** 1107

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**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):

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City of Buenos Aires, April 22, 2026.

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)**

**TGS Files 2025 Annual Report on Form 20-F**

**Buenos Aires, Argentina, April 22, 2026**. Transportadora de Gas del Sur S.A. ("tgs" or "the Company") (NYSE: TGS, MERVAL: TGSU2) announced that today it filed its annual report on Form 20-F for the fiscal year ended December 31, 2025 (the "2025 Annual Report") with the U.S. Securities and Exchange Commission (the "SEC"). The 2025 Annual Report can be accessed by visiting the Company's website at www.tgs.com.ar as well as on the SEC's website at www.sec.gov. In addition, shareholders may receive a hard copy of the Company's complete financial statements free of charge by requesting a copy from Carlos Almagro (calmagro@tgs.com.ar) or Leandro Perez Castaño (leandro_perez@tgs.com.ar) in TGS's Investor Relations Office at +(54-11) 3751-5100.

*tgs is the leader in Argentina in the transportation of natural gas, transporting approximately 60% of the gas consumed in the country, through more than 5,700 miles of gas pipelines, with a firm contracted capacity of 89.4 MMn3/d. It is one of the main natural gas processors. In addition, tgs´ infrastructure investments in Vaca Muerta basin will allow to grow significantly in the provision of services to natural gas producers, positioning tgs as one of the main Midstreamers in Argentina. tgs shares are traded on NYSE (New York Stock Exchange) and BYMA (Bolsas y Mercados Argentinos S.A.). The controlling company of tgs is Compañía de Inversiones de Energía S.A. ("CIESA"), which owns 53.83% of the total share capital. CIESA's shareholders are: (i) Pampa Energía S.A. with 50%, (ii) Grupo Investor Petroquímica S.L. (member of the GIP group, led by the Sielecki family) and PCT L.L.C. with the remaining 50%.*

**Hernán Diego Flores Gómez**

**Head of Market Relations**

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**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.

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

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

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Date: April 22, 2026.

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