ASUR files 2025 Form 20-F and sustainability report

Rhea-AI Filing Summary

Grupo Aeroportuario del Sureste (ASUR) has filed its 2025 annual report on Form 20-F for the year ended December 31, 2025 with the U.S. Securities and Exchange Commission and published its 2025 Sustainability Report covering environmental, social and governance performance.

Both reports are available as PDFs on ASUR’s investor relations website, and investors can request a free printed copy of the 2025 Form 20-F through The Bank of New York Mellon. ASUR operates 16 airports across Mexico, Colombia and Puerto Rico and is listed in Mexico and on the NYSE through ADSs.

Key Figures

ADS ratio: 1 ADS = 10 B-series shares Total airports operated: 16 airports Airports in southeast Mexico: 9 airports +2 more

5 metrics

ADS ratio 1 ADS = 10 B-series shares ASUR share structure for NYSE-listed ADSs

Total airports operated 16 airports Concessions across the Americas

Airports in southeast Mexico 9 airports Includes Cancún Airport, major tourist gateway

Airports in northern Colombia 6 airports Includes Medellin international airport (Rionegro)

Aerostar Airport Holdings stake 60% interest Operator of San Juan’s Luis Muñoz Marin International Airport

Key Terms

Form 20-F, Sustainability Report, public–private partnership, American Depositary Share, +1 more

5 terms

Form 20-F regulatory

"its annual report on Form 20-F for the year ended December 31, 2025"

Form 20-F is the standardized annual disclosure that non-U.S. companies must file with the U.S. securities regulator when their shares are traded in the U.S.; it contains audited financial statements, a plain-language description of the business, management discussion, governance details and key risk factors. It matters to investors because it provides a consistent, comparable company “report card” and rulebook, helping buyers assess financial health, governance and risks before investing.

Sustainability Report financial

"ASUR has also published its 2025 Sustainability Report, which discusses the company's environmental, social, governance performance"

A sustainability report is a document a company publishes that describes its environmental, social and governance practices, risks, and goals—essentially a report card on how the business impacts people and the planet. Investors use it to judge long-term risks and opportunities that don’t show up on the balance sheet, such as regulatory exposure, reputational damage or resource shortages; think of it like a building’s maintenance record that helps predict future repair costs and safety issues.

public–private partnership regulatory

"the only major airport in the U.S. to have successfully completed a public–private partnership under the FAA Pilot Program"

A public–private partnership is a formal agreement where a government agency and a private company share responsibility for delivering, funding, operating, or maintaining a public project or service—such as roads, hospitals, or utilities—with risks, payments and duties split between them. It matters to investors because these deals create long-term contracts and revenue streams tied to government objectives and performance, while also exposing returns to political, regulatory and operational risks—like a private firm jointly running a public asset under a multi-year lease.

American Depositary Share financial

"One ADS represents ten (10) B-series shares"

An American Depositary Share (ADS) is a U.S.-listed certificate that represents a specified number of shares in a foreign company, held by a custodian bank; it works like a receipt that allows U.S. investors to buy and trade foreign equity on American exchanges without dealing with another country’s markets. Investors care because ADSs make foreign stocks easier to access, improve liquidity and settlement in dollars, and can affect dividend payments, voting rights and regulatory oversight compared with buying the underlying foreign shares directly.

airport concessions financial

"a portfolio of concessions to operate, maintain, and develop 16 airports across the Americas"

FAQ

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

What did Grupo Aeroportuario del Sureste (ASR) announce in this Form 6-K?

Grupo Aeroportuario del Sureste announced it has filed its 2025 Form 20-F with the U.S. Securities and Exchange Commission and published its 2025 Sustainability Report. These documents provide its annual financial disclosure and an overview of environmental, social and governance performance for 2025.

How can ASR investors access the 2025 Form 20-F and Sustainability Report?

Investors can download PDF versions of ASUR’s 2025 Form 20-F and 2025 Sustainability Report from the company’s investor relations website at www.asur.com.mx. They can also request a printed copy of the 2025 Form 20-F free of charge by calling The Bank of New York Mellon.

What does ASUR’s 2025 Sustainability Report cover for ASR shareholders?

ASUR’s 2025 Sustainability Report discusses the company’s environmental, social and governance performance. It offers shareholders and other stakeholders insight into how the airport group manages key sustainability topics alongside its financial and operational results disclosed in the 2025 Form 20-F.

What airports and regions are included in ASUR’s operations?

ASUR operates 16 airports across the Americas. These include nine airports in southeast Mexico such as Cancún Airport, six airports in northern Colombia including Medellin international airport, and Luis Muñoz Marin International Airport in San Juan, Puerto Rico through Aerostar Airport Holdings.

On which stock exchanges are ASUR shares and ADSs for ASR traded?

ASUR is listed on the Mexican Bolsa under the symbol ASUR and on the New York Stock Exchange under the symbol ASR. One American Depositary Share (ADS) represents ten B-series shares, giving international investors a way to access the company’s equity.

What additional business segment does ASUR operate through ASUR US?

ASUR has expanded into airport commercial services through ASUR US, which partners with airports and airlines to deliver enhanced retail and passenger experiences. ASUR Airports operates at major U.S. hubs like Los Angeles International, Chicago O’Hare and John F. Kennedy International airports.

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

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Accepted by SEC EDGAR 04/16/2026 - 07:08 PM EDT Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2026

GRUPO AEROPORTUARIO DEL SURESTE, S.A.B. de C.V.

(SOUTHEAST AIRPORT GROUP)

(Translation of Registrant’s Name Into English)

México

(Jurisdiction of incorporation or organization)

Bosque de Alisos No. 47A– 4th Floor

Bosques de las Lomas

05120 México, D.F.

(Address of principal executive offices)

(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 whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to 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): 82- .)

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.

Grupo Aeroportuario del Sureste, S.A.B. de C.V.
By:	/s/ ADOLFO CASTRO RIVAS
	Adolfo Castro Rivas
	Chief Executive Officer

Date: April 16, 2026

Exhibit 99.1

Contacts: ASUR Lic. Adolfo Castro +52+55-5284-0408 acastro@asur.com.mx Lic. David Barlow +52-55-5284-0483 dbarlow@asur.com.mx   InspIR Group Susan Borinelli +1-646-330-5907 susan@inspirgroup.com

ASUR Files its 2025 Form 20-F with the U.S. Securities and Exchange

Commission and Publishes its 2025 Sustainability Report

MEXICO CITY, April 16, 2026 - 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, announces that its annual report on Form 20-F for the year ended December 31, 2025, has been filed with the U.S. Securities and Exchange Commission. ASUR has also published its 2025 Sustainability Report, which discusses the company's environmental, social, governance performance.

You can access PDF versions of ASUR´s 2025 Form 20-F and 2025 Sustainability Report at its Investor Relations website www.asur.com.mx.

Investors can receive a printed copy of ASUR’s 2025 20-F free of charge by calling The Bank of New York Mellon at 1-212-815-2838.

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 across the Americas. The Company operates nine airports in southeast of Mexico, including Cancún Airport, the largest tourist gateway in Mexico, the Caribbean, and Latin America; as well as six airports in northern Colombia, including Medellin international airport (Rionegro), the second busiest in Colombia. 

ASUR also holds a 60% interest in Aerostar Airport Holdings, LLC, operator of Luis Muñoz Marin International Airport in San Juan, the capital of Puerto Rico, the island’s primary international gateway. San Juan Airport was the first and remains the only major airport in the U.S. to have successfully completed a public–private partnership under the FAA Pilot Program. ASUR has recently expanded into airport commercial services through ASUR US, which partners with airports and airlines to deliver enhanced retail and passenger experiences. ASUR Airports operates at major U.S. hubs, including Los Angeles International, Chicago O’Hare, and John F. Kennedy International, and has a track record of outperforming U.S. commercial revenue benchmarks.

Headquartered in Mexico, ASUR is listed on both the Mexican Bolsa (BMV) under the symbol ASUR, and on the NYSE in the U.S., where it trades under the symbol ASR. One ADS represents ten (10) B-series shares. For further information, visit www.asur.com.mx

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• EX-99.1 EXHIBIT 99.1 10.8 KB