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SOUTHEAST AIRPORT GROUP

For the period ended Sep 28, 2026. Filed Sep 28, 2026.

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Sep 28, 2026 · Filed Sep 28, 2026

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ASR$263.81-0.2%Stored close · as of Nov 6, 2026
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6-K 1 tm2626158d1_6k.htm FORM 6-K

**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

Commission File Number: 1-15132

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, Ciudad de México

(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-FxForm 40-F¨

TABLE OF CONTENTS

Page
FORWARD-LOOKING STATEMENTS1
PRESENTATION OF INFORMATION3
OPERATING AND FINANCIAL REVIEW7
RECENT DEVELOPMENTS16
PRO FORMA FINANCIAL INFORMATION18
EXHIBIT INDEX19

We have prepared this report to provide our investors with disclosure and financial information regarding recent developments in our business and results of operations for the six-month period ended June 30, 2026.

The information in this report should be read together with the information contained in our annual report on Form 20-F for the year ended December 31, 2025 (File No. 1-15132), filed with the U.S. Securities and Exchange Commission on April 16, 2026.

-i-

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