ASUR closes $992M deal for 20 Latin American airports

Rhea-AI Filing Summary

SOUTHEAST AIRPORT GROUP (ASR), operating as Grupo Aeroportuario del Sureste (ASUR), completed the acquisition of Motiva Infraestrutura de Mobilidade’s entire equity interest in Companhia de Participações em Concessões (CPC) for R$5.1 billion (US$992.2 million), following customary closing adjustments and satisfaction of all conditions precedent.

The deal was financed through a loan facility arranged when ASUR submitted its offer to Motiva and adds 20 airports across four Latin American and Caribbean markets, including Brazil. ASUR previously held concessions for 16 airports across the Americas, including nine in southeastern Mexico and six in northern Colombia, plus a 60% interest in San Juan’s Luis Muñoz Marin International Airport.

Positive

• Completed R$5.1 billion (US$992.2 million) airport portfolio acquisition, adding 20 airports across four Latin American and Caribbean markets and advancing ASUR’s stated growth strategy.

Negative

• None.

Key Figures

Purchase price: R$5.1 billion Purchase price (USD equivalent): US$992.2 million Airports added through transaction: 20 airports +5 more

8 metrics

Purchase price R$5.1 billion Acquisition of Motiva’s entire equity interest in CPC, following customary closing adjustments

Purchase price (USD equivalent) US$992.2 million Equivalent value of the R$5.1 billion consideration for Motiva’s equity interest in CPC

Airports added through transaction 20 airports Airports across four markets in Latin America and the Caribbean added to ASUR’s portfolio

Existing airport concessions 16 airports Airports ASUR operates across the Americas prior to the CPC acquisition

ASUR interest in Aerostar Airport Holdings, LLC 60% Equity interest in the operator of Luis Muñoz Marin International Airport in San Juan, Puerto Rico

Motiva assets 37 assets Mobility infrastructure assets Motiva operates across 13 Brazilian states

Motiva toll roads 4,475 kilometers Extent of toll roads managed and maintained by Motiva

Motiva annual rail passengers 750 million passengers Passengers transported annually by Motiva’s rail platform

Key Terms

conditions precedent, loan facility, concessions, public–private partnership, +1 more

5 terms

conditions precedent regulatory

"following the satisfaction of all conditions precedent under the agreement"

Conditions precedent are the specific tasks, approvals, or facts that must be satisfied before a contract or transaction becomes effective or a payment is made. Think of them as a checklist you must complete before turning the key on a new machine; if items are missing the deal can be delayed, renegotiated, or canceled. Investors watch these conditions because they determine timing, completion risk, and whether expected benefits will actually occur.

loan facility financial

"was financed through a loan facility arranged when ASUR submitted its offer"

A loan facility is a formal agreement with a bank or lender that lets a company borrow money up to a set limit under agreed terms — like a large credit card or mortgage tailored for a business. It matters to investors because it determines how easily a company can get cash for operations, growth or debt repayment, and influences interest costs, leverage and any lender-imposed rules that can affect future strategy and risk.

concessions regulatory

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

Concessions are deliberate incentives or compromises offered by a seller, issuer, or underwriter—such as price discounts, extra shares, fee reductions, or other sweeteners—to make an investment or transaction more attractive. Like a store marking down an item to entice buyers, concessions matter to investors because they lower expected returns or signal weaker demand, changing the true cost, value and risk of the deal.

public–private partnership regulatory

"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.

Corporate Sustainability Index financial

"included in the B3 Corporate Sustainability Index for 14 years"

FAQ

What acquisition did ASR (Grupo Aeroportuario del Sureste) just complete?

ASR completed the acquisition of Motiva Infraestrutura de Mobilidade’s entire equity interest in Companhia de Participações em Concessões (CPC), a Motiva subsidiary that holds airport interests in Brazil, Ecuador, Costa Rica and Curaçao, after all conditions precedent under a November 18, 2025 agreement were satisfied.

What was the purchase price for ASR’s acquisition of CPC?

The purchase price for ASR’s acquisition of Motiva’s entire equity interest in CPC was R$5.1 billion, equivalent to US$992.2 million, following customary closing adjustments as stated in the announcement.

How many airports does ASR gain through this Motiva-related transaction?

As a result of acquiring Motiva’s equity interest in CPC, ASR has added 20 airports to its portfolio across four markets in Latin America and the Caribbean, including airports in Brazil, Ecuador, Costa Rica and Curaçao.

How did ASR finance the R$5.1 billion acquisition of CPC?

ASR financed the R$5.1 billion acquisition through a loan facility that was arranged when ASR submitted its offer to Motiva. The announcement describes this facility as the financing source for the transaction.

What was ASR’s airport portfolio before this new acquisition?

Before this acquisition, ASR held concessions to operate, maintain, and develop 16 airports across the Americas: nine in southeastern Mexico, six in northern Colombia, and a 60% interest in Aerostar Airport Holdings, operator of Luis Muñoz Marin International Airport in San Juan, Puerto Rico.

Who is Motiva in the ASR (ASR) transaction?

Motiva Infraestrutura de Mobilidade S.A. is described as Brazil’s largest mobility infrastructure company, operating 37 assets in 13 Brazilian states across toll roads, rail, and airports, including an airport platform of 17 Brazilian airports and three international airports.

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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 September 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: September 1, 2026

Exhibit 99.1

Contactos:   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 CLOSES ACQUISITION OF MOTIVA’S INTERESTS IN AIRPORTS IN BRAZIL, ECUADOR, COSTA RICA AND CURAÇAO

Mexico City, September 1, 2026 – Grupo Aeroportuario del Sureste, S.A.B. de C.V. (NYSE: ASR; BMV: ASUR) (“ASUR”) and Motiva Infraestrutura de Mobilidade S.A. (B3: MOTV3) (“Motiva”) announced today that, following the satisfaction of all conditions precedent under the agreement entered into on November 18, 2025, the acquisition of Motiva’s entire equity interest in Companhia de Participações em Concessões (“CPC”), a subsidiary owned by Motiva, has been closed for a purchase price of R$5.1 billion (US$992.2 million), following customary closing adjustments.

The transaction represents a key component of ASUR’s growth strategy and was financed through a loan facility arranged when ASUR submitted its offer to Motiva.

As a result of the transaction, ASUR has added to its portfolio 20 airports across four markets in Latin America and the Caribbean, including Brazil, Latin America’s largest aviation market by passenger traffic.

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 southeastern 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 Airports, which partners with airports and airlines to deliver enhanced retail and passenger experiences. ASUR US Airports operates at major U.S. hubs, including Los Angeles International, Chicago O’Hare, and John F. Kennedy International, and has historically shown competitive performance against 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.

About Motiva

Motiva Infraestrutura de Mobilidade S.A. (“Motiva”) is Brazil’s largest mobility infrastructure company, operating across the toll road, rail and airport sectors. It operates 37 assets in 13 Brazilian states and employs more than 16,000 people. The Company is responsible for managing and maintaining 4,475 kilometers of toll roads and provides 3,600 services daily. Its rail platform, which operates subway systems, trains and light rail vehicles, transports 750 million passengers annually. Its airport platform, comprising 17 airports in Brazil and three internationally, serves approximately 45 million passengers per year. The Company has been included in the B3 Corporate Sustainability Index for 14 years. For more information, please visit www.motiva.com.br.

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