Page 1

Contacts in Buenos Aires , Argentina : Investor Relations Leandro Perez Castaño , Finance and IR Manager . *leandro_perez@tgs.com.ar Carlos Almagro , Investor Relations Officer * carlos_almagro@tgs.com.ar Media Relations Mario Yaniskowski mario_yaniskowski@tgs.com.ar tgs Announces Results for the Third Quarter ended on September 30 , 2021 ( 1 ) Transportadora de Gas del Sur ( " tgs " , " the Company " , " us " , " our " , or " we " ) 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 2.9 Bcf / d . We are one of the main natural gas processors . In addition , our infrastructure investments in Vaca Muerta formation is a milestone with the aim of becoming one of the main Midstreamers at Vaca Muerta . Our shares are traded on NYSE ( New York Stock Exchange ) and BYMA ( Bolsas y Mercados Argentinos S.A. ) . Our controlling company is Compañía de Inversiones de Energía S.A. ( " CIESA " ) , which owns 51 % 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. hold the remaining 50 % . For further information , see our website www.tgs.com.ar Stock Information BYMA Symbol : TGSU2 NYSE Symbol : TGS ( 1 ADS = 5 ordinary shares ) Shareholding structure as of September 30 , 2021 tgs holds 794,495,283 issued shares and 752,761,058 outstanding shares . Buenos Aires , Argentina , November 8 , 2021 During the 3Q2021 , total comprehensive income amounted to Ps . 4,415 million , or Ps . 5.86 per share ( Ps . 29.32 per ADS ) , compared to total comprehensive income of Ps . 593 million , or Ps . 0.78 per share ( Ps . 3.91 per ADS ) for the third quarter ended on September 30 , 2020 ( 3Q2020 ) . http : // QTCIQWBPD02 : 8080 / CIQDotNet / Filings / Downloads Operating profit for 3Q2021 amounted to Ps . 5,147 million , a decrease of Ps . 3,127 million compared to 3Q2020 . This variation was mainly due to : Lower revenues from the Natural Gas Transportation segment of Ps . 2,439 million due to lack of tariffs adjustment since April 2019 ; Operating costs and administrative and commercialization expenses , excluding depreciation , increased by Ps . 1,435 million compared to 3Q2020 , which were partially offset by higher revenues from the Other Services and Production and Commercialization of Natural Gas Liquids ( Liquids ) segments amounting Ps . 583 million and Ps . 231 million , respectively , Financial results recorded a positive variation of Ps . 7,001 million . The financial information presented in this press release is based on consolidated interim financial statements presented in constant Argentine pesos as of September 30 , 2021 ( Ps . ) which is based on the application of