Exhibit 99.1

ASUR Reports 3Q23 Financial Results

Total passenger traffic in 3Q23 increased 3.4% YoY

Mexico City, October 23, 2023 – Grupo Aeroportuario del Sureste, S.A.B. de C.V. (NYSE: ASR; BMV: ASUR) (ASUR), a leading international airport group with operations in Mexico, the U.S., and Colombia, today announced results for the three- and nine-month month periods ended September 30, 2023.

3Q23 Highlights1

Passenger Traffic

ASUR's total passenger traffic in 3Q23 increased by 3.4% year-over-year to 17.6 million.

Total passenger traffic in Mexico increased by 5.7% year-over-year to 10.7 million in 3Q13, with an 11.9% increase in domestic traffic and a 0.6% decrease in international traffic.

In Puerto Rico, total passenger traffic in 3Q23 increased by 24.8% year-over-year to 3.2 million, reflecting increases of 23.0% in domestic traffic and 41.3% in international traffic.

Total passenger traffic in Colombia for 3Q23 declined 14.5% YoY to 3.7 million passengers, driven by a 17.8% decrease in domestic traffic mainly reflecting the suspension of operations of Viva Air and Ultra Air since 1Q23. International traffic increased 0.7% YoY.

On page 19 of this report you will find the tables with detailed information on passenger traffic for each airport.

Table 3: % YoY Change in Passenger Traffic 2023 & 2022

Review of Consolidated Results

Consolidated Revenues

Consolidated Revenues for 3Q23 increased 0.7% YoY, or Ps.44.0 million, to Ps.6,338.8 million, mainly due to the following increases:

These increases were partially offset by a 33.1%, or Ps.151.5 million, YoY decline in construction services revenues to Ps.305.6 million, principally in Mexico.

Excluding revenues from construction services, for which there is an equivalent expense recorded under IFRS accounting standards, total revenues would have increased 3.3% YoY, to Ps.6,033.2 million.

Excluding revenues from construction services, Mexico represented 73.2% of ASUR´s total revenues in 3Q23, while Puerto Rico and Colombia represented 15.6% and 11.2%, respectively.

Commercial Revenues in 3Q23 increased 3.2% YoY to Ps.2,077.3 million, mainly reflecting the 3.2% increase in passenger traffic (including transit and general aviation passengers). Commercial revenues increased 2.4% to Ps.1,468.0 million in Mexico and 7.7% to Ps.441.3 million in Puerto Rico, and were partly offset by a 1.0% decline to Ps.167.9 million in Colombia.

Commercial Revenues per Passenger remained flat YoY at Ps.116.5 in 3Q23.

Consolidated Operating Costs and Expenses

Consolidated Operating Costs and Expenses, including construction costs, increased 2.4% YoY, or Ps.61.3 million, to Ps.2,660.3 million in 3Q23.

Excluding construction costs, operating costs and expenses increased 9.9% YoY, or Ps.212.8 million, reflecting the following factors:

Cost of Services increased 19.5%, or Ps.196.6 million, mainly reflecting YoY increases in personnel costs, surveillance and cleaning services, maintenance and conservation, energy. Higher cost of revenues from concession stores operated directly by ASUR together with a more difficult comps from the Ps.175.7 million recovery in expenses in 3Q22 in connection with the application of the American Rescue Plan Act also contributed to the YoY increase in costs of services. This was partially offset by the foreign exchange conversion impact resulting from the appreciation of the Mexican peso against the US dollar together with the depreciation of the Mexican peso against the Colombian peso.

Construction Costs declined 33.1% YoY, or Ps.151.5 million. This was mainly driven by a YoY decline of 53.6%, or Ps.213.4 million in construction costs in Mexico, which offset the 106.0% or Ps.61 million increases in Puerto Rico and 59.7%, Ps.0.9 million in Colombia.

Administrative Expenses that reflect administrative costs in Mexico increased 13.0% YoY.

Consolidated Technical Assistance increased by 4.3% YoY mainly.

Concession Fees increased 0.7% YoY, principally reflecting a 6.2% increase in Mexico due to higher regulated revenues which is a factor in the calculation of the concession fee. This was partially offset by declines of 6.4% and 1.3% in Colombia and Puerto Rico, respectively reflecting lower revenues in these two countries.

Depreciation and Amortization declined 0.6% YoY, or Ps.2.9 million, principally due to decreases of 8.5%, or Ps.8.9 million in Colombia and 11.7%, or Ps.21.3 million in Puerto Rico, partially offset by an increase of 11.6% or Ps.27.3 million in Mexico.

Consolidated Operating Profit and EBITDA

ASUR reported a Consolidated Operating Profit of Ps.3,678.5 million in 3Q23 representing an operating margin of 58.0%, compared to Ps.3,696.1 million in 3Q22 and an operating margin of 58.7%.

Adjusted Operating Margin, which excludes the effect of IFRIC 12 with respect to the construction of or improvements to concessioned assets in Mexico, Colombia and Puerto Rico was 61.0% in 3Q23 compared to 63.3% in 3Q22. Adjusted operating margin is calculated as operating profit or loss divided by total revenues less construction services revenues.

EBITDA increased 3.2%, or Ps.131.4 million, to Ps.4,198.4 million in 3Q23, from Ps.4,067.0 million in 3Q22. By country of operations, EBITDA increased YoY by 4.4% or Ps.138.3 million to Ps.3,286.6 million in Mexico, and by 7.9%, or Ps.36.9 million, to Ps.503.6 million in Puerto Rico. In Colombia, EBITDA declined by 9.6%, or Ps.43.9 million, to Ps.411.3 million. Consolidated EBITDA margin in 3Q23 was 66.2% up from 64.6% in 3Q22.

Adjusted EBITDA Margin, which excludes the effect of IFRIC 12 with respect to the construction of or improvements to concessioned assets in Mexico, Puerto Rico, and Colombia, was 69.6% in 3Q23, compared to 69.7% in 3Q22.

Consolidated Comprehensive Financing Gain (Loss)

In 3Q23 ASUR reported a Ps.143.0 million Consolidated Comprehensive Financing Gain, compared to a Ps.185.2 million loss in 3Q22.

During 3Q23 ASUR reported a foreign exchange gain of Ps.126.7 million, resulting from the 1.6% quarter-end depreciation of the Mexican peso against the U.S. dollar (0.5% average appreciation) during the period, together with a U.S. dollar net asset position. This compares to a Ps.3.5 million foreign exchange gain in 3Q22 resulting from the 0.2% quarter-end appreciation of the Mexican peso (0.5% average depreciation) on a U.S. dollar net asset position.

Interest expense declined Ps.18.9 million, or 6.4% YoY, mainly reflecting FX conversion in Puerto Rico.

Interest income increased 171.3%, or Ps.186.1 million YoY, reflecting a higher cash balance position.

Income Taxes

Income Taxes for 3Q23 increased Ps.175.6 million YoY, principally due to the following increasesariations:

Majority Net Income

ASUR reported Majority Net Income of Ps.2,709.5 million in 3Q23, compared to Ps.2,546.5 million in 3Q22. This resulted in earnings per common share in 2Q23 of Ps.9.0318, or earnings per ADS of US$5.1869 (one ADS represents ten series B common shares). This compares to earnings per share of Ps.8.4883, or earnings per ADS of US$4.8748 for 3Q22.

Net Income

ASUR reported Net Income of Ps.2,807.1 million in 3Q23, increasing 4.8%, or Ps.128.8 million, from Ps.2,678.4 million in 3Q22.

Consolidated Financial Position

Airport concessions represented 69.6% of ASUR’s total assets on September 30, 2023, with current assets representing 29.7% and other assets 0.7%.

Cash and cash equivalents as of September 30, 2023, amounted to Ps.16,917.2 million, a 28.4% increase from Ps.13,175.0 million as of December 31, 2022. Mexico, Colombia and Puerto Rico contributed with Ps.11,796.9 million, Ps.2,120.6 million and Ps.2,999.8 million in cash and cash equivalents, respectively.

As of September 30, 2022, the valuation of ASUR’s investment in Aerostar in accordance with IFRS 3 "Business Combinations," had the following effects on its balance sheet: (i) the recognition of a net intangible asset of Ps.4,670.9 million, (ii) goodwill of Ps.831.9 million (net of an impairment of Ps.4,719.1 million), (iii) deferred taxes of Ps.467.1 million, and (iv) a minority interest of Ps.4,860.7 million in stockholders' equity.

The valuation of ASUR’s investment in Airplan, in accordance with IFRS 3 “Business Combinations”, resulted in the following effects on the balance sheet as of September 30, 2023: (i) the recognition of a net intangible asset of Ps.823.5 million, (ii) goodwill of Ps.1,365.9 million, (iii) deferred taxes of Ps.212.4 million, and (iv) a Ps.216.6 million recognition of bank loans at fair value.

Stockholders’ equity as of September 30, 2023, was Ps. 49,844.4 million and total liabilities were Ps. 21,442.8 million, representing 69.9% and 30.1% of ASUR’s total assets, respectively. Deferred liabilities represented 14.0% of ASUR’s total liabilities.

Total Debt at quarter-end declined 18.5% to Ps.12,358.5 million from Ps.15,204.8 million on December 31, 2022, mainly reflecting (i) the FX conversion impact on the Notes issued by Aerostar in Puerto Rico reflecting peso appreciation against the U.S. dollar, and (ii) payment of principal amounts of outstanding debt of Ps.1,425.0 million in Mexico and Ps.201.2 million in Puerto Rico.

On September 30, 2023, 20.8% of ASUR’s Total Debt was denominated in Mexican pesos, 71.6% in U.S. Dollars (at Aerostar in Puerto Rico) and 7.6% in Colombian pesos.

In July 2022, Aerostar in Puerto Rico issued US$200 million principal amount of 4.92% senior secured notes due March 22, 2035. In May 2022, Aerostar renegotiated the terms of its US$50 million principal amount of 6.75% senior secured notes originally due on June 24, 2015, and extended their maturity through 2035. All long-term debt is collateralized by Aerostar’s assets.

In April 2023, Banco Popular transferred to the Bank of Bogotá its interests under the syndicated loan entered into with Airplan by issuing promissory notes under the same terms and conditions than the original loan.

LTM Net Debt-to-LTM EBITDA stood at negative 0.3x at the close of 3Q23, while the Interest Coverage Ratio was 11.4x. This compares with LTM Net Debt-to-LTM EBITDA of 0.1x and an Interest Coverage Ratio of 10.7x at September 30, 2022, respectively.

Strong Liquidity Position and Healthy Debt Maturity Profile

ASUR closed 3Q23 with a solid financial position, with cash and cash equivalents totaling Ps.16,917.2 million and Ps.12,386.5 million in Total Debt. A total of Ps.50.0 million in principal amount of outstanding debt payments is due in 4Q23.

The following table shows the liquidity position for each of ASUR’s regions of operations:

Accounts Receivables

Accounts receivables increased 4.0% YoY in 3Q23, reflecting higher business activity as passenger traffic increased across ASUR’ s airport network.

On February 28 and March 29, 2023, Viva Colombia and Ultra Air suspended operations. During 2022, these two companies accounted for 17.4% and 1.9% of passenger traffic in Colombia, respectively. At the end of 3Q23, these two companies owed ASUR Ps.14.2 million and Ps.10.5 million, respectively.

Table 11: Accounts Receivable as of September 30, 2023

Figures in Thousands of Mexican Pesos

Note: Net of allowance for bad debts.

Capital Expenditures

ASUR made capital expenditures of Ps.367.3 million in 3Q23. Of this amount, Ps.235.6 million were allocated to modernizing the Company´s Mexican airports pursuant to its master development plans, Ps.129.6 million were invested by Aerostar in Puerto Rico and Ps.2.1 million were invested by Airplan in Colombia. This compares to Ps.548.2 million invested in 3Q22, of which Ps.482.8 million were invested in Mexico, Ps.64.0 million in Puerto Rico and Ps.1.4 million in Colombia.

During the nine-month period ended September 30, 2023, ASUR invested Ps.663.3 million in capital expenditures, of which Ps.387.1 million were allocated to the modernization of its Mexican airports within the framework of its development plan, Ps.267.3 million to Aerostar in Puerto Rico and Ps.8.9 million to Airplan in Colombia. This compares to Ps.1,300.9 million invested in 3Q22, of which Ps.1,069.2 million were allocated to its Mexican airports, Ps.228.6 million to Puerto Rico and Ps.3.1 million to Colombia.

3Q23 Relevant Events

ASUR Announces Government Action to Change Tariff Base Regulation

On October 4, 2023, ASUR received a notification from the Federal Civil Aviation Agency (Agencia Federal de Aviacion Civil, “AFAC”), a deconcentrated entity of the Secretary of Infrastructure, Communications and Transport (“SICT”), that it has decided to amend with immediate effect the terms of the tariff base regulation set forth in Annex 7 of the concession agreements undertaken with the SICT on June 29, 1998, as amended on March 19, 1999, in connection with the airports ASUR operates in Mexico’s South East region. Section 10.8 of the concession agreements provides that any of the terms of the concession may be amended by mutual agreement between the SICT and ASUR in accordance with applicable law.

On October 18, the Chamber of Deputies approved the initiative to increase the concession fee from 5% to 9%. The increase and the date on which it would enter into force are subject to the approval of the Senate.

On October 19, 2023, ASUR received a notification from the government that modifies the document received on October 4, 2023. The Amended Terms received on October 19, 2023, can be found on ASUR´s website www.asur.com.mx.

ASUR is currently evaluating the tariff changes implemented by AFAC and the impact that it may have on its business, results of operation and financial condition.

Review of Mexico Operations

Mexico Revenues

Mexico Revenues increased 0.5% YoY to Ps.4,598.6 million.

Excluding construction, revenues increased 5.6% YoY, mainly reflecting increases of 8.2% in revenues from aeronautical services and 1.5% in revenues from non-aeronautical services, resulting principally from the 5.7% increase in passenger traffic (including transit and general aviation passengers).

Commercial Revenues increased 2.4% YoY, principally reflecting the 6.0% increase in passenger traffic (including transit and general aviation passengers) as shown in Table 12. Commercial Revenues per Passenger for 3Q23 was Ps.135.9 compared to Ps.140.7 in 3Q22.

ASUR classifies commercial revenues as those derived from the following activities: duty-free stores, car rentals, retail operations, banking and currency exchange services, advertising, teleservices, non-permanent ground transportation, food and beverage operations, parking lot fees, and other.

As shown in Table 14, during the last 12 months, ASUR opened 16 new commercial spaces, 7 of which were opened at Cancun airport, 5 at Merida airport, 3 at Oaxaca airport, and 1 at Huatulco airport. More details of these openings can be found on page 20 of this report.

Mexico Operating Costs and Expenses

Total Mexico Operating Costs and Expenses declined 5.3% YoY, or Ps.89 million. Excluding construction costs, operating costs and expenses increased 9.8%, or Ps.124.4 million, mainly reflecting higher personnel expenses, technical assistance, energy, concession fees, security and maintenance costs. Higher cost of sales at stores operated by ASUR also contributed to the increase in costs.

Cost of Services increased 11.3% YoY, primarily due to increases in surveillance and cleaning services, maintenance and conservation, energy, taxes and fees and professional fees; together with higher cost of sales at stores directly operated by ASUR along with personnel expenses.

Administrative Expenses increased 13.0% YoY mainly reflecting an increase in personnel expenses.

The Technical Assistance fee paid to ITA increased 4.3% YoY reflecting higher EBITDA in Mexico, which is used in the calculation of the fee.

Concession Fees, which include fees paid to the Mexican government, increased 6.2%, principally due to the increase in regulated revenues which is used in the calculation of the concession fee.

Depreciation and Amortization increased 11.6% YoY, reflecting the recognition of investments made to date.

Mexico Consolidated Comprehensive Financing Gain (Loss)

ASUR’s Mexico operations reported a Ps.200.8 million Comprehensive Financing Gain in 3Q23, compared to a Ps.55.0 million loss in 3Q22. This was mainly due to a foreign exchange gain of Ps.125.5 million in 3Q23 resulting from the 1.6% quarter-end depreciation of the Mexican peso (0.5% average appreciation) against the U.S. dollar on a foreign currency net asset position. This compares to a Ps.4.1 million foreign exchange gain in 3Q22, resulting from the 0.2% quarter-end appreciation of the Mexican peso during that period (0.5% average depreciation) against the U.S. dollar on a foreign currency net asset position.

Interest expenses declined 6.4% YoY, or Ps.8.0 million while interest income increased 192.6% YoY or Ps.126.4 million, resulting from a higher cash balance.

Mexico Operating Profit (Loss) and EBITDA

Mexico reported an Operating Gain of Ps.3,020.3 million in 3Q23 and an Operating Margin of 65.7%. This compares to an Operating Gain of Ps.2,909.0 million and an Operating Margin of 63.6% in 3Q22.

Adjusted Operating Margin, which excludes the effect of IFRIC 12 with respect to the construction of or improvements to concessioned assets and which is calculated as operating profit divided by total revenues excluding construction services revenues, was 68.4% in 3Q23, compared to 69.6% in 3Q22.

EBITDA increased 4.4%, or Ps183.3 million, to Ps.3,283.6 million in 3Q23, from Ps.3,145.2 million in 3Q22. EBITDA margin in 3Q23 was 71.4% compared to 68.7% in 3Q22.

Adjusted EBITDA Margin, which excludes the effect of IFRIC 12 with respect to the construction of or improvements to concessioned assets, was 74.4% in 2Q23, compared to 75.3% in 3Q22.

Mexico Tariff Regulation

The Mexican Ministry of Communications and Transportation regulates the majority of ASUR’s activities by setting maximum rates, which represent the maximum possible revenues allowed per traffic unit at each airport.

ASUR’s accumulated regulated revenues at its Mexican operations, as of September 30, 2023 totaled Ps.8,755.9 million, with an average tariff per workload unit of Ps.263.3 (December 2022 Mexican pesos), representing approximately 64.5% of total income in Mexico (excluding construction revenues) for the period.

The Mexican Ministry of Communications and Transportation reviews compliance with maximum rate regulations at the end of each year.

Mexico Capital Expenditures

During 3Q23 ASUR invested Ps.235.6 million in connection with its plan to modernize its Mexican airports under its master development plans, compared to an investment of Ps.482.8 million in 3Q22. During 9M23, capital investments amounted to Ps.387.1 million compared to Ps.1,069.2 million in 1H22.

Review of Puerto Rico Operations

The following discussion compares Aerostar’s independent results for the three- and six-month periods ended September 30, 2022 and 2023.

As of September 30, 2022, the valuation of ASUR’s investment in Aerostar in accordance with IFRS 3 "Business Combinations," had the following effects on its balance sheet: (i) the recognition of a net intangible asset of Ps.4,670.9 million, (ii) goodwill of Ps.831.9 million (net of an impairment of Ps.4,719.1 million), (iii) deferred taxes of Ps.467.1 million, and (iv) a minority interest of Ps.4,860.7 million in stockholders' equity.

Puerto Rico Revenues

Total Puerto Rico Revenues increased 6.0% YoY to Ps.1,061.7 million in 3Q23.

Excluding construction services, revenues declined by 0.1%, mainly due to the following YoY variations:

Commercial Revenues per Passenger were Ps.139.2 in 3Q23, compared to Ps.161.3 in 3Q22.

Four commercial spaces were opened at Luis Muñoz Marin (LMM) Airport over the last 12 months, as shown in Table 20. More details can be found on page 20 of this report.

ASUR classifies commercial revenues as those derived from the following activities: duty-free stores, car rentals, retail operations, advertising, non-permanent ground transportation, food and beverage operations, parking lot fees, banking and currency exchange services, and other.

Puerto Rico Operating Costs and Expenses

Total Operating Costs and Expenses in Puerto Rico increased 32.7% YoY to Ps.718.9 million in 3Q23. Construction costs in the quarter increased 106.0% to Ps.118.6 million from Ps.57.6 million in 3Q22.

Excluding construction costs, operating costs and expenses increased 24.0% YoY, or Ps.116.3 million principally reflecting a recovery of expenses for a total of Ps.175.7 million in 3Q22 in connection with the American Rescue Plan Act, partially offset by the appreciation of the Mexican peso against the U.S. dollar in the period.

Cost of Services increased 53.9% or Ps.138.2 million in 3Q23, mainly reflecting a Ps.175.7 expense recovery in 3Q22 in connection with the American Rescue Plan Act. This was partially offset by the appreciation of the Mexican peso against the US dollar.

Concession Fees paid to the Puerto Rican government declined 1.3% YoY, or Ps.0.6 million in 3Q23, consistent with the terms agreed under the concession agreement.

Depreciation and Amortization decreased 11.7% YoY, or Ps.21.3 million, principally reflecting the foreign exchange translation impact as the quarter-end and average Mexican peso exchange rate fluctuated from Ps.17.4127 and Ps.17.0572 per U.S. dollar in 3Q22, to Ps.20.0925 and Ps.20.2334 per U.S. dollar, respectively in 3Q23.

Puerto Rico Comprehensive Financing Gain (Loss)

During 3Q23, Puerto Rico reported a Ps.90.1 million Comprehensive Financing Loss, compared to a Ps.121.3 million loss in 3Q22, principally due to interest accrued from the US$200.0 million bond issuance in July 2022.

On March 22, 2013, Aerostar carried out a private bond placement for a total of US$350.0 million to finance a portion of the Concession Agreement payment to the Puerto Rico Ports Authority, and certain other costs and expenditures associated with it. On June 24, 2015, Aerostar carried out a private bond placement for a total of US$50.0 million.

In December 2020, Aerostar entered into a three-year revolving line of credit with Banco Popular de Puerto Rico for the amount of US$20.0 million. Funds have not yet been withdrawn.

In May 2022, Aerostar renegotiated the terms of its US$50.0 million principal amount of 6.75% senior secured notes extending the maturity to March 22, 2035.

In July 2022, Aerostar in Puerto Rico issued US$200.0 million principal amount of 4.92% senior secured notes due March 22, 2035. All long-term debt is collateralized by Aerostar’s assets.

Puerto Rico Operating Profit and EBITDA

Operating Profit at Puerto Rico declined 25.5% to Ps.324.9 million resulting in an Operating Margin of 32.3%, from an operating profit of Ps.460.3 million and an Operating Margin of 46.0% in 3Q22.

EBITDA increased 7.9% to Ps.503.6 million in 3Q23 from Ps.466.6 million in 3Q22. EBITDA Margin, in turn, increased to 47.4% in 3Q23 from 46.6% in 3Q22.

Adjusted EBITDA Margin (which excludes IFRIC 12) increased to 53.4% in 3Q23, from 49.4% in 3Q22.

Puerto Rico Capital Expenditures

During 3Q23, Aerostar made capital expenditures of Ps.129.6 million, compared to investments of Ps.64.0 million in 2Q22. Capital expenditures for the nine-months ended September 30, 2023 amounted to Ps.267.3 million compared to Ps.228.6 million for the same period in 2022.

Puerto Rico Tariff Regulation

The Airport Use Agreement entered into by and among Aerostar, the airlines serving LMM Airport, and the Puerto Rico Ports Authority governs the relationship between Aerostar and the principal airlines serving LMM Airport. The agreement entitles Aerostar to an annual contribution from the airlines of US$62.0 million during the first five years of the term. From year six onwards, the total annual contribution for the prior year increases in accordance with an adjusted consumer price index factor based on the U.S. non-core consumer price index. The annual fee is divided between the airlines that operate at LMM Airport in accordance with the regulations and structure defined under the Airport Use Agreement to establish the contribution of each airline for each particular year.

Review of Colombia Operations

The following discussion compares Airplan's independent results for the three- and nine-month periods ended September 30, 2023 and 2022.

The valuation of ASUR’s investment in Airplan, in accordance with IFRS 3 “Business Combinations”, resulted in the following effects on the balance sheet as of September 30, 2023: (i) the recognition of a net intangible asset of Ps.823.5 million, (ii) goodwill of Ps.1,365.9 million, (iii) deferred taxes of Ps.212.4 million, and (iv) a Ps.216.6 million recognition of bank loans at fair value.

Colombia Revenues

Total Revenues in Colombia declined 5.3% YoY to Ps.678.5 million. Excluding construction services, revenues declined 5.5% YoY, primarily due to the 14.5% decline in passenger traffic resulting from the suspension of operations of Viva Air and Ultra Air as of 1Q23.

Commercial Revenue per Passenger was Ps.43.4 compared to Ps.37.3 in 3Q22.

As shown in Table 26, 46 new commercial spaces were opened in Colombia in the last twelve months. Further detail of these openings can be found on page 20 of this report.

ASUR classifies commercial revenues as those derived from the following activities: duty-free stores, car rentals, retail operations, advertising, non-permanent ground transportation, food and beverage operations, parking lot fees, teleservices, banking and currency exchange services and other.

Colombia Costs & Expenses

Total Operating Costs and Expenses in Colombia declined 6.9% YoY to Ps.363.1 million. Excluding construction costs, operating costs and expenses declined 7.2% YoY to Ps.360.8 million. This decrease was mainly driven by the foreign exchange conversion of the Colombian peso with respect to the Mexican peso, partially offset by increases in personnel costs, security and cleaning expenses.

Cost of Services declined 6.9% YoY, or Ps.10.2 million.

Construction Costs increased 59.7% YoY, or Ps.0.9 million due to investments in furniture and equipment.

Concession Fees, which include fees paid to the Colombian government, declined 6.4% YoY, mainly reflecting the decrease in regulated and non-regulated revenues during the period.

Depreciation and Amortization declined 8.5%.

Colombia Comprehensive Financing Gain (Loss)

During 3Q23, Airplan reported a Ps.32.3 million Comprehensive Financing Gain, compared to an Ps.8.9 million loss in 3Q22.

Colombia Operating Profit (Loss) and EBITDA

In 3Q23, ASUR's operations in Colombia reported an Operating Profit of Ps.315.4 million, compared to Ps.326.7 million in 3Q22. Operating margin was 46.5% in 3Q23 compared to an operating margin of 45.6% in 3Q22. Adjusted operating margin, which excludes the effect of IFRIC12 with respect to construction or improvements to concessioned assets, was 46.6% in 3Q23 compared to an adjusted operating margin of 45.7% in 3Q22.

EBITDA in 3Q23 was Ps.411.3 million resulting in an EBITDA margin of 60.6%. This compares to an EBITDA of Ps.455.2 million and an EBITDA margin of 63.5% in 3Q22.

The Adjusted EBITDA Margin, which excludes the effect of IFRIC12 with respect to the construction or improvements of the concessioned assets, was 60.8% in 3Q23, compared to an adjusted EBITDA margin of 63.6% in 3Q22, mainly reflecting the impact in passenger traffic and bad debt provisions resulting from the suspension of two local airlines in Colombia in 1Q23.

Colombia Capital Expenditures

During 3Q23, Airplan made capital investments of Ps.2.1 million compared to Ps.1.4 million in 3Q22. Accumulated capital investments for 9M23 amounted to Ps.8.8 million compared to Ps.3.1 million in 9M22.

Colombia Tariff Regulation

Functions of the Special Administrative Unit of Civil Aeronautics include establishing and collecting fees, tariffs, and rights for the provision of aeronautical and airport services or those that are generated by the concessions, authorizations, licenses, or any other type of income or property. As a result, Resolution 04530, issued on September 21, 2007, establishes tariffs for the rights and the rates conceded to the concessionaire of the following airports: José María Córdova of Rionegro, Enrique Olaya Herrera of Medellín, Los Garzones of Montería, El Caraño of Quibdó, Antonio Roldán Betancourt of Carepa, and Las Brujas of Corozal. This resolution also established the methodology to update and the mechanisms to collect such fees, tariffs, and rights. Airplan's regulated revenues amounted to Ps.508.2 million in 3Q23.

Definitions

Concession Services Agreements (IFRIC 12 interpretation). In Mexico and Puerto Rico, ASUR is required by IFRIC 12 to include in its income statement an income line, “Construction Revenues,” reflecting the revenue from construction or improvements to concessioned assets made during the relevant period. The same amount is recognized under the expense line “Construction Costs” because ASUR hires third parties to provide construction services. Because equal amounts of Construction Revenues and Construction Costs have been included in ASUR's income statement as a result of the application of IFRIC 12, the amount of Construction Revenues does not have an impact on EBITDA, but it does have an impact on EBITDA Margin. In Colombia, “Construction Revenues” include the recognition of the revenue to which the concessionaire is entitled for carrying out the infrastructure works in the development of the concession, while “Construction Costs” represents the actual costs incurred in the execution of such additions or improvements to the concessioned assets.

Majority Net Income reflects ASUR’s equity interests in each of its subsidiaries and therefore excludes the 40% interest in Aerostar that is owned by other shareholders. Other than Aerostar, ASUR owns (directly or indirectly) 100% of its subsidiaries.

EBITDA means net income before provision for taxes, deferred taxes, profit sharing, non-ordinary items, participation in the results of associates, comprehensive financing cost, and depreciation and amortization. EBITDA should not be considered as an alternative to net income, as an indicator of our operating performance or as an alternative to cash flow as an indicator of liquidity. Our management believes that EBITDA provides a useful measure that is widely used by investors and analysts to evaluate our performance and compare it with other companies. EBITDA is not defined under U.S. GAAP or IFRS and may be calculated differently by different companies.

Adjusted EBITDA Margin is calculated by dividing EBITDA by total revenues excluding construction services revenues for Mexico, Puerto Rico, and Colombia and excludes the effect of IFRIC 12 with respect to the construction or improvements to concessioned assets. ASUR is required by IFRIC 12 to include in its income statement an income line reflecting the revenue from construction or improvements to concessioned assets made during the relevant period. The same amount is recognized under the expense line “Construction Costs” because ASUR hires third parties to provide construction services. In Mexico and Puerto Rico, because equal amounts of Construction Revenues and Construction Costs have been included in ASUR's income statement as a result of the application of IFRIC 12, the amount of Construction Revenues does not have an impact on EBITDA, but it does have an impact on EBITDA Margin, as the increase in revenues that relates to Construction Revenues does not result in a corresponding increase in EBITDA. In Colombia, construction revenues do have an impact on EBITDA, as construction revenues include a reasonable margin over the actual cost of construction. Like EBITDA Margin, Adjusted EBITDA Margin should not be considered as an indicator of our operating performance or as an alternative to cash flow as an indicator of liquidity and is not defined under U.S. GAAP or IFRS and may be calculated differently by different companies.

About ASUR

Grupo Aeroportuario del Sureste, S.A.B. de C.V. (ASUR) is a leading international airport operator with a portfolio of concessions to operate, maintain, and develop 16 airports in the Americas. These comprise nine airports in southeast Mexico, including Cancun Airport, the most important tourist destination in Mexico, the Caribbean, and Latin America, and six airports in northern Colombia, including José María Córdova International Airport (Rionegro), the second busiest airport in Colombia. ASUR is also a 60% JV partner in Aerostar Airport Holdings, LLC, operator of the Luis Muñoz Marín International Airport serving the capital of Puerto Rico, San Juan. San Juan’s Airport is the island’s primary gateway for international and mainland-US destinations and was the first and currently the only major airport in the US to have successfully completed a public–private partnership under the FAA Pilot Program. Headquartered in Mexico, ASUR is listed both on the Mexican Bolsa, where it trades under the symbol ASUR, and on the NYSE in the U.S., where it trades under the symbol ASR. One ADS represents ten (10) series B shares. For more information, visit www.asur.com.mx

Analyst Coverage

In accordance with Article 4.033.01 of the Mexican Stock Exchange Internal Rules, ASUR reports that the stock is covered by the following broker-dealers: Actinver, Banorte, Barclays, BBVA, Bradesco, BTG Pactual, Citi Global Markets, GBM Grupo Bursatil, Goldman Sachs, HSBC Securities, Insight Investment Research, Intercam, Itau BBA Securities, JP Morgan, Jefferies, Punto Research, Santander, Scotiabank, Signum Research, UBS Casa de Bolsa and Vector.

Please note that any opinions, estimates or forecasts with respect to the performance of ASUR issued by these analysts reflect their own views, and therefore do not represent the opinions, estimates or forecasts of ASUR or its management. Although ASUR may refer to or distribute such statements, this does not imply that ASUR agrees with or endorses any information, conclusions or recommendations included therein.

Forward Looking Statements

Some of the statements contained in this press release discuss future expectations or state other forward-looking information. Those statements are subject to risks identified in this press release and in ASUR’s filings with the SEC. Actual developments could differ significantly from those contemplated in these forward-looking statements. In particular, the impact of the COVID-19 pandemic on global economic conditions and the travel industry, as well as on the business and results of operations of the Company in particular, is expected to be material, and, as conditions are changing rapidly, is difficult to predict. The forward-looking information is based on various factors and was derived using numerous assumptions. Our forward-looking statements speak only as of the date they are made and, except as may be required by applicable law, we do not have an obligation to update or revise them, whether as a result of new information, future or otherwise.

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