[Material Fact Disclosure](index=2&type=section&id=Material%20Fact%20Disclosure) This section details the company's material fact disclosure concerning a change in its principal office address [Change of Principal Office Address](index=2&type=section&id=Re.:%20Material%20fact.%20Change%20of%20principal%20of%20ice%20address.) On June 29, 2023, the Board of Directors of Transportadora de Gas del Sur S.A. (tgs) approved the change of the company's principal office address, with the new address being Madero Office - 355 Cecilia Grierson St., 26th floor, in the Autonomous City of Buenos Aires, effective July 17, 2023 - The Board of Directors of tgs resolved to change the principal office address in a meeting held on June 29, 2023[4](index=4&type=chunk) - The new principal office address is: Madero Office - 355 Cecilia Grierson St., 26th floor, Autonomous City of Buenos Aires, Argentina[4](index=4&type=chunk) - The change of address will be effective as of July 17, 2023[4](index=4&type=chunk)

Revenue and Tariffs - The company generated 25% of total revenues from Natural Gas Transportation public service contracts, which are subject to government regulation[53]. - A tariff increase of 60% was received since March 1, 2022, following a period of tariff freeze under Decree 1020[58]. - The company is currently negotiating a transitional tariff increase of 95% on natural gas transportation tariffs and Access and Use Charges[61]. - The company has faced delays in tariff adjustments, which have negatively impacted its financial situation[61]. - The completion of the Regulatory Tariff Indexation (RTI) process has been extended until December 18, 2023[59]. - The company is unable to predict future government measures regarding the tariff system, which may adversely affect its financial results[62]. - The company has suffered from insufficient tariff increases to offset rising operating costs due to inflation[61]. - The Argentine government has implemented the Solidarity Law, which froze natural gas and electricity tariffs, and allowed for state intervention in ENARGAS until December 31, 2023[82]. Economic Conditions and Risks - The ongoing economic conditions in Argentina, including high inflation, have adversely affected the company's financial condition and revenues[54]. - The company faces risks from potential future operating restrictions or mandatory investments imposed by the government, which could adversely affect its financial condition[64]. - The government has prioritized domestic supply at stable prices, which has led to interruptions in gas exports during shortages[66]. - The company cannot assure that future expansion projects will not adversely affect its results of operations or financial condition[81]. - There is uncertainty regarding the success of government measures to increase natural gas production, which could adversely affect the company's midstream and liquids production businesses[96]. - The company faces competition in the natural gas processing sector, which could impact revenues and operational results[148]. - Economic volatility, high inflation, and political instability continue to pose risks to Argentina's economic outlook and the company's operations[217]. Investments and Infrastructure - The Five-Year Plan requires investments of Ps.6,786 million to improve pipeline system operations and maintenance[55]. - The company has implemented a reduction in current investment plans to adapt to economic expectations in Argentina, without compromising safety[88]. - The construction of the NK Pipeline is expected to enhance natural gas transportation capacity, but could also affect the company's operations if third-party pipelines are developed[156][158]. Liquids Business - The Liquids business has represented over 50% of total revenues between 2004 and 2017, and during fiscal years 2021 and 2022[115]. - The ongoing volatility in Liquids prices is influenced by geopolitical issues, production variations, and macroeconomic conditions, which may continue in the future[117]. - Export duties on Liquids products currently stand at 8% under the Solidarity Law, impacting profitability[119]. - Regulatory actions have impacted the company's Liquids business, with domestic fuel prices differing significantly from international market prices, affecting investment viability[97]. Operational Challenges - The company has faced delays in receiving compensation under government programs designed to stabilize LPG prices, impacting financial performance[100]. - The company is subject to numerous affirmative and restrictive covenants in its outstanding indebtedness, which may limit operational flexibility and ability to pursue business opportunities[135]. - The company faces risks related to adverse operational conditions affecting PBB's capacity to purchase ethane, which could impact financial results[134]. - The company is subject to risks from mechanical or electrical failures that may affect its ability to fulfill contractual commitments[165]. - The company faces potential operational disruptions due to climate change and increased regulation on greenhouse gas emissions[177]. Financial Stability and Debt - Argentina's public debt load stands at $323 billion, including loans from the IMF[192]. - Outstanding debt with private bondholders is approximately $121 billion[192]. - The Argentine government announced a debt restructuring offer that achieved 99% participation from bondholders[193]. - The debt restructuring resulted in an exchange premium of 130% and a loss of international reserves amounting to US$1.3 billion[196]. - The primary fiscal deficit for 2021 was reported at 3% of GDP, while the primary fiscal deficit for 2022 reached 2.4% of GDP, meeting the IMF agreement targets[207]. - The peso depreciated by 72.5% against the U.S. dollar in 2022, following significant devaluations in previous years[219]. - The inability to access international capital markets could significantly adversely affect the company's financial condition and operations[204]. COVID-19 Impact - The COVID pandemic has introduced significant uncertainty, affecting operational, commercial, and financial activities, with potential long-term impacts on market prices and demand[123]. - The company has implemented measures to ensure operational continuity during the COVID pandemic, including health protocols for essential workers[126]. - The effects of COVID-19 on public health remain uncertain, potentially impacting earnings, cash flow, and liquidity[227]. Political and Regulatory Environment - The Solidarity Law has granted the Executive Branch broad legislative powers, affecting public utility rates and tax structures[232]. - The pension adjustment system has been suspended to address the fiscal deficit, impacting the financial condition of the country[234]. - The political instability in Argentina has led to a decline in investor confidence and heightened market volatility[228]. - The upcoming presidential and legislative elections scheduled for August 13, 2023, and October 22, 2023, may lead to significant changes in government policies[230].

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(B) OR (G) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________. OR ☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 O ...

Transportadora de Gas del Sur SA (NYSE:TGS) Q4 2021 Earnings Conference Call March 9, 2022 9:00 AM ET Company Participants Alejandro Basso – Chief Financial Officer Conference Call Participants Operator Everyone for attending this year's Fourth Quarter 2021 results video conference. This year's issued its earnings report yesterday. If you did not receive a copy, please do not hesitate to contact us by email. We would like to inform you that this event is being recorded and all participants will be in listen ...

Financial Data and Key Metrics Changes - The company reported a net income of ARS 4.4 billion in Q3 2021, a significant increase from almost ARS 600 million in Q3 2020 [9] - Total EBITDA decreased by ARS 3.1 billion, primarily due to a decline in natural gas transportation EBITDA by ARS 2.6 billion and a decrease in liquids business EBITDA by around ARS 900 million [9][10] - Financial results showed a positive variation of ARS 7 billion, which offset the total EBITDA decline, mainly due to lower foreign exchange rate losses compared to Q3 2020 [10][17] Business Line Data and Key Metrics Changes - EBITDA from the natural gas transportation business decreased by ARS 2.6 billion, attributed to the lack of tariff adjustments since 2019 [11] - Liquids business EBITDA fell from ARS 4 billion to ARS 3.1 billion, influenced by increased natural gas costs and lower sales volumes [13][14] - EBITDA from other services increased by 37%, mainly due to higher revenues from midstream services [15] Market Data and Key Metrics Changes - The average natural gas cost increased from $2.2 to $4 per million BTU, contributing to the decline in EBITDA [14] - The company experienced a decline in liquid sales volume from 66,000 metric tons to 8,000 metric tons, impacting overall revenues [14] Company Strategy and Development Direction - The company is focused on expanding its infrastructure and closing new agreements with gas producers, driven by increased natural gas production in Vaca Muerta [4] - An open season was launched to assign almost 100% of the capacity in new firm capacity contracts with an average term of 20 years [6] - The company plans to continue generating positive free cash flow despite the deterioration of operating margins [20] Management's Comments on Operating Environment and Future Outlook - Management expects international natural gas prices to remain high in the upcoming quarters, although predicting exact prices is challenging [23] - The expansion of the international transportation system is under analysis by the national government, which could positively impact operations [24][25] - Management indicated that normalized transportation margins may not be achieved until 2023 due to high inflation and ongoing tariff reviews [30] Other Important Information - The company maintained a stable cash position of around ARS 33 billion, equivalent to over $330 million, with no debt amortization until 2025 [20] - CapEx for the quarter amounted to ARS 2.2 billion, reflecting ongoing investments in infrastructure [20] Q&A Session Summary Question: Will natural gasoline prices sustain in the fourth quarter and into 2022? - Management expects international prices to remain high based on market futures, but exact predictions are difficult [23] Question: What is the potential impact of the expansion of the international transportation system? - The expansion is under analysis and is expected to positively impact the company's ability to evacuate gas [24][25] Question: Will the transitional tariff scheme allow for full margin recovery? - Management indicated that predicting the normalization of transportation margins is difficult, with potential adjustments not expected until 2023 [30] Question: What caused the increase in OpEx compared to 2020? - The increase in OpEx is attributed to the pandemic's impact on maintenance capabilities, leading to higher operational costs [31] Question: Can you discuss the shortage of gas for processing in Q3 2021? - The shortage was anticipated due to seasonal demand, and management is addressing this through planned replacements [32] Question: What is the status of the transitional adjustment process? - Management cannot predict the next adjustment but indicated it would likely be below general inflation [33]

Transportadora de Gas del Sur S.A. (NYSE:TGS) Q2 2021 Earnings Conference Call August 5, 2021 10:00 AM ET Company Participants Alejandro Basso - Chief Financial Officer Conference Call Participants Konstantinos Papalias - PUENTE MartÃn Arancet - Balanz Capital Operator Good morning. My name is Laura and I will be your conference operator today. At this time, I would like to welcome everyone to TGS Second Quarter 2021 Results Earnings Conference Call. TGS issued its earnings report yesterday. If you did not ...

Financial Assets and Liabilities - As of December 31, 2020, the company had total financial assets of Ps. 19,288,650 thousand, with fixed interest rate assets amounting to Ps. 16,108,712 thousand and variable interest rate assets of Ps. 3,179,938 thousand[1335]. - The company's total financial liabilities were Ps. 40,976,742 thousand, all of which were at fixed interest rates, indicating limited exposure to cash flow interest rate risk[1335][1332]. - As of December 31, 2020, the company's financial debt obligations denominated in foreign currency amounted to U.S.$521 million (Ps. 43,869 million), with a net liability position in U.S. dollars of U.S.$283 million[1345]. Foreign Exchange Risk - A hypothetical unfavorable 10% change in the peso/U.S. dollar exchange rate would have resulted in a potential financial expense loss of Ps. 2,534 million[1347]. - Approximately 87% of revenues from the Liquids Production and Commercialization segment were denominated in U.S. dollars for the years ended December 31, 2020, 2019, and 2018[1340]. - As of December 31, 2020, 96% of the company's fund placements were denominated in U.S. dollars to mitigate foreign exchange risk[1344]. - The company did not contract derivative financial instruments to hedge against foreign exchange risk during the years ended December 31, 2020, 2019, and 2018[1343]. Inflation and Purchasing Power - The company recorded a net gain from exposure to inflation in monetary items due to maintaining a liability monetary position during the years ended December 31, 2020, 2019, and 2018[1338]. - The company’s risk management policy aims to reduce the impact of loss of purchasing power and includes regular evaluations of alternative investments[1342]. Impact of Commodity Prices - The company estimated that a decrease of U.S.$50/ton in the international price of LPG and natural gasoline would have decreased its net comprehensive income by Ps. 2,019 million for the year ended December 31, 2020[1354].

Transportadora de Gas del Sur S.A. (NYSE:TGS) Q4 2020 Results Conference Call March 10, 2021 9:00 AM ET Company Participants Oscar Sardi - CEO Alejandro Basso - CFO Carlos Almagro - IR Officer Conference Call Participants Guilherme Levy - Morgan Stanley Ezequiel Fernandez Lopez - Balanz Robert Chang - Citi Lorena Reich - Lucror Operator Good morning. My name is Paul, and I will be your conference operator today. At this time, I would like to welcome everyone to TGS's Fourth Quarter 2020 Results Earnings Con ...

Transportadora de Gas del Sur S.A. (NYSE:TGS) Q3 2020 Earnings Conference Call November 10, 2020 9:00 AM ET Company Participants Alejandro Basso - CFO & VP, Administration, Finance and Services Conference Call Participants Ezequiel Fernández - Balanz Lorena Reich - Lucror Analytics Jorge Vargas - BTG Pactual Operator Good morning. My name is Rob, and I'll be your conference operator. At this time, I'd like to welcome everyone to TGS Third Quarter 2020 Results Earnings Conference Call. TGS issued its earning ...

Transportadora de Gas del Sur S.A. (NYSE:TGS) Q2 2020 Earnings Conference Call August 10, 2020 10:00 AM ET Company Participants Alejandro Basso - CFO & VP, Administration, Finance and Services Conference Call Participants Ezequiel Fernández - Balanz Bruno Montanari - Morgan Stanley Antonella Rapuano - Santander Operator Good morning. My name is Doug, and I'll be your conference operator today. At this time, I'd like to welcome everyone to TGS' Second Quarter 2020 Results Earnings Conference Call. TGS issued ...