ASUR (NYSE: ASR) posts 5.6M May passengers, down 1.6%

Rhea-AI Filing Summary

Grupo Aeroportuario del Sureste (ASUR) reported that May 2026 passenger traffic reached 5.6 million, a 1.6% decrease versus May 2025. Traffic fell 4.2% in Mexico and 3.7% in Puerto Rico, while Colombia grew 6.6%, helped by stronger domestic and international demand.

Across all regions, domestic passengers rose 1.3% and international passengers declined 6.9%. For the year to date, total traffic was 30.6 million passengers, up 0.7% from the same period of 2025, showing modest overall growth despite weaker international flows, particularly in Cancun.

Key Figures

May 2026 total passengers: 5,627,341 passengers May 2026 total traffic change: 1.6% decrease Mexico May 2026 passengers: 3,105,645 passengers +5 more

8 metrics

May 2026 total passengers 5,627,341 passengers Group total traffic for May 2026 vs May 2025

May 2026 total traffic change 1.6% decrease Total passenger traffic vs May 2025

Mexico May 2026 passengers 3,105,645 passengers Mexico traffic in May 2026, down 4.2% year-on-year

Colombia May 2026 passengers 1,412,468 passengers Colombia traffic in May 2026, up 6.6% year-on-year

San Juan May 2026 passengers 1,109,228 passengers San Juan Airport traffic in May 2026, down 3.7%

Year-to-date 2026 total traffic 30,571,318 passengers Group year-to-date traffic 2026 vs 30,344,455 in 2025

YTD 2026 Colombia growth 9.1% increase Year-to-date 2026 Colombia traffic vs 2025

Mexico May 2026 international change 10.0% decrease Mexico international passengers vs May 2025

Key Terms

public–private partnership, concessions, ADS, domestic traffic, +1 more

5 terms

public–private partnership financial

"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."

concessions financial

"a leading international airport operator with a portfolio of concessions to operate, maintain, and develop 16 airports across the Americas."

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.

ADS financial

"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."

Ads are paid promotional messages a company places across media — online, on TV, in print, or on social platforms — to attract customers, explain products, or shape public perception. For investors, ads matter because they drive sales growth, affect how much a company must spend to win customers, and influence brand strength and long-term value. Ads can also create regulatory or reputational risk if claims are misleading, which can affect profits and stock price.

domestic traffic financial

"Growth in Colombia was driven by increases of 7.0% in domestic traffic and 5.4% in international traffic."

Domestic traffic is the flow of customers, users, shipments or activity a business sees inside its home country — for example store visits, website visitors, deliveries or passengers within national borders. Investors watch it because it shows how well a company is serving and growing its local market, reveals dependence on one economy, and affects revenue, costs and risk exposure; think of it like foot traffic through a mall that drives most of a store’s sales.

international traffic financial

"In Mexico, domestic traffic increased 1.3% and international traffic decreased 10.0%, while in Puerto Rico domestic traffic declined 4.4%, partially offset by a 2.0% increase in international traffic."

International traffic means people, data, shipments or transactions that cross national borders to use a product, service or platform—for example website visits, phone calls, flights or packaged goods moving between countries. Investors care because the amount and growth of international traffic show how widely a business reaches foreign customers, expose it to currency and regulatory risks, and signal opportunities for revenue expansion much like a store gaining shoppers from new neighborhoods.

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Form 6-K: How Foreign Companies Report to the SEC →

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 June 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: June 8, 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 Announces Total Passenger Traffic for May 2026

Passenger traffic increased year-on-year by 6.6% in Colombia, and decreased by 4.2% in México and 3.7% in Puerto Rico

Mexico City, June 8, 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, today announced that passenger traffic for May 2026 reached a total of 5.6 million passengers, representing a decrease of 1.6% compared to May 2025.

Passenger traffic increased 6.6% in Colombia, while declining 4.2% in Mexico and 3.7% in Puerto Rico. Growth in Colombia was driven by increases of 7.0% in domestic traffic and 5.4% in international traffic. In Mexico, domestic traffic increased 1.3% and international traffic decreased 10.0%, while in Puerto Rico domestic traffic declined 4.4%, partially offset by a 2.0% increase in international traffic.

All figures in this statement reflect comparisons between the period from May 1 to May 31, 2026, and from May 1 to May 31, 2025. Transit and general aviation passengers are excluded only for Mexico and Colombia.

Passenger Traffic Summary
	May		% Chg		Year to date		% Chg
	2025	2026			2024	2025
Mexico	3,241,572	3,105,645	(4.2)		17,698,454	17,462,761	(1.3)
Domestic Traffic	1,676,907	1,698,038	1.3		7,911,040	7,866,276	(0.6)
International Traffic	1,564,665	1,407,607	(10.0)		9,787,414	9,596,485	(2.0)
San Juan, Puerto Rico	1,151,279	1,109,228	(3.7)		5,934,429	5,787,421	(2.5)
Domestic Traffic	1,014,574	969,756	(4.4)		5,275,709	5,127,833	(2.8)
International Traffic	136,705	139,472	2.0		658,720	659,588	0.1
Colombia	1,324,870	1,412,468	6.6		6,711,572	7,321,136	9.1
Domestic Traffic	1,018,035	1,088,928	7.0		5,129,643	5,633,988	9.8
International Traffic	306,835	323,540	5.4		1,581,929	1,687,148	6.7
Total Traffic	5,717,721	5,627,341	(1.6)		30,344,455	30,571,318	0.7
Domestic Traffic	3,709,516	3,756,722	1.3		18,316,392	18,628,097	1.7
International Traffic	2,008,205	1,870,619	(6.9)		12,028,063	11,943,221	(0.7)

ASUR Page 1 of 3 

Mexico Passenger Traffic
		May		% Chg		Year to date		% Chg
		2025	2026			2025	2026
Domestic Traffic		1,676,907	1,698,038	1.3		7,911,040	7,866,276	(0.6)
CUN	Cancun	867,155	841,058	(3.0)		3,989,968	3,752,379	(6.0)
CZM	Cozumel	24,465	24,445	(0.1)		100,019	104,539	4.5
HUX	Huatulco	56,904	55,070	(3.2)		272,924	261,617	(4.1)
MID	Merida	281,520	313,280	11.3		1,376,687	1,518,804	10.3
MTT	Minatitlan	12,767	11,882	(6.9)		62,172	56,290	(9.5)
OAX	Oaxaca	126,673	128,147	1.2		651,454	636,013	(2.4)
TAP	Tapachula	41,655	43,945	5.5		212,489	209,451	(1.4)
VER	Veracruz	147,640	154,782	4.8		674,186	720,849	6.9
VSA	Villahermosa	118,128	125,429	6.2		571,141	606,334	6.2
International Traffic		1,564,665	1,407,607	(10.0)		9,787,414	9,596,485	(2.0)
CUN	Cancun	1,468,569	1,305,796	(11.1)		9,105,270	8,892,050	(2.3)
CZM	Cozumel	26,617	24,988	(6.1)		210,652	205,042	(2.7)
HUX	Huatulco	1,769	2,047	15.7		95,080	106,132	11.6
MID	Merida	28,352	29,549	4.2		172,627	183,228	6.1
MTT	Minatitlan	548	739	34.9		2,926	3,563	21.8
OAX	Oaxaca	18,947	16,538	(12.7)		113,382	101,972	(10.1)
TAP	Tapachula	1,972	7,196	264.9		10,802	18,518	71.4
VER	Veracruz	12,726	13,614	7.0		58,134	62,249	7.1
VSA	Villahermosa	5,165	7,140	38.2		18,541	23,731	28.0
Traffic Total Mexico		3,241,572	3,105,645	(4.2)		17,698,454	17,462,761	(1.3)
CUN	Cancun	2,335,724	2,146,854	(8.1)		13,095,238	12,644,429	(3.4)
CZM	Cozumel	51,082	49,433	(3.2)		310,671	309,581	(0.4)
HUX	Huatulco	58,673	57,117	(2.7)		368,004	367,749	(0.1)
MID	Merida	309,872	342,829	10.6		1,549,314	1,702,032	9.9
MTT	Minatitlan	13,315	12,621	(5.2)		65,098	59,853	(8.1)
OAX	Oaxaca	145,620	144,685	(0.6)		764,836	737,985	(3.5)
TAP	Tapachula	43,627	51,141	17.2		223,291	227,969	2.1
VER	Veracruz	160,366	168,396	5.0		732,320	783,098	6.9
VSA	Villahermosa	123,293	132,569	7.5		589,682	630,065	6.8

US Passenger Traffic, San Juan Airport (LMM)
	May		% Chg		Year to date		% Chg
	2025	2026			2025	2026
SJU Total	1,151,279	1,109,228	(3.7)		5,934,429	5,787,421	(2.5)
Domestic Traffic	1,014,574	969,756	(4.4)		5,275,709	5,127,833	(2.8)
International Traffic	136,705	139,472	2.0		658,720	659,588	0.1

Colombia Passenger Traffic Airplan
		May		% Chg		Year to date		% Chg
		2025	2026			2025	2026
Domestic Traffic		1,018,035	1,088,928	7.0		5,129,643	5,633,988	9.8
MDE	Rionegro	770,850	816,949	6.0		3,873,233	4,285,754	10.7
EOH	Medellin	97,082	98,644	1.6		463,595	461,179	(0.5)
MTR	Monteria	103,396	124,399	20.3		564,160	650,725	15.3
APO	Carepa	15,492	16,048	3.6		70,733	76,137	7.6
UIB	Quibdo	28,289	30,740	8.7		133,276	149,309	12.0
CZU	Corozal	2,926	2,148	(26.6)		24,646	10,884	(55.8)
International Traffic		306,835	323,540	5.4		1,581,929	1,687,148	6.7
MDE	Rionegro	306,835	323,540	5.4		1,581,929	1,687,148	6.7
EOH	Medellin
MTR	Monteria	-	-			-	-
APO	Carepa	-	-			-	-
UIB	Quibdo	-	-			-	-
CZU	Corozal	-	-			-	-
Traffic Total Colombia		1,324,870	1,412,468	6.6		6,711,572	7,321,136	9.1
MDE	Rionegro	1,077,685	1,140,489	5.8		5,455,162	5,972,902	9.5
EOH	Medellin	97,082	98,644	1.6		463,595	461,179	(0.5)
MTR	Monteria	103,396	124,399	20.3		564,160	650,725	15.3
APO	Carepa	15,492	16,048	3.6		70,733	76,137	7.6
UIB	Quibdo	28,289	30,740	8.7		133,276	149,309	12.0
CZU	Corozal	2,926	2,148	(26.6)		24,646	10,884	(55.8)

ASUR Page 2 of 3 

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.

-     END     -

ASUR Page 3 of 3 

FAQ

How did ASUR (ASR) total passenger traffic change in May 2026?

ASUR’s May 2026 passenger traffic was 5.6 million, down 1.6% year-on-year. The decline reflects weaker international volumes, especially in Mexico, partially offset by growth in Colombia’s domestic and international traffic during the month.

How did ASUR’s Mexico airports perform in May 2026?

Mexico passenger traffic fell 4.2% year-on-year in May 2026. Domestic traffic grew 1.3%, but international traffic dropped 10.0%, with Cancun total traffic down 8.1%, pressuring overall results for the Mexican portfolio that month.

What was ASUR’s Colombia passenger traffic trend in May 2026?

Colombia passenger traffic rose 6.6% year-on-year in May 2026. Domestic traffic increased 7.0% and international 5.4%, led by Rionegro (Medellin) where total traffic increased 5.8%, supporting overall group performance despite softness elsewhere.

How did San Juan Airport (Puerto Rico) traffic evolve for ASUR?

San Juan Airport passenger traffic declined 3.7% year-on-year in May 2026. Domestic traffic fell 4.4% while international traffic grew 2.0%, leading to a 2.5% year-to-date decrease compared with the same period of 2025.

What are ASUR’s year-to-date 2026 passenger traffic figures?

Year-to-date 2026, ASUR handled 30.6 million passengers, a 0.7% increase. Domestic traffic rose 1.7% to 18.6 million passengers, while international traffic slipped 0.7% to 11.9 million passengers across Mexico, Puerto Rico, and Colombia.

Which ASUR markets showed the strongest growth in early 2026?

ASUR’s Colombia operations showed the strongest growth in early 2026. Year-to-date traffic there rose 9.1%, with domestic passengers up 9.8% and international up 6.7%, driven largely by higher volumes at Rionegro (Medellin) Airport.

Filing Exhibits & Attachments

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• EX-99.1 EXHIBIT 99.1 138.1 KB