ASUR (NYSE: ASR) posts 6.4M July passengers with mixed regional trends

Q: What was Grupo Aeroportuario del Sureste (ASR)’s total passenger traffic in July 2026?

ASUR handled 6.4 million passengers (6,383,731) in July 2026, a 1.9% decrease versus July 2025. This figure aggregates Mexico, San Juan in Puerto Rico, and Colombia, excluding transit and general aviation passengers in Mexico and Colombia.

Q: How did ASR’s Mexico passenger traffic perform in July 2026?

Mexico airports handled 3,473,501 passengers in July 2026, a 4.0% decline year-on-year. Within this, domestic traffic rose 3.6% to 1,862,054 passengers, while international traffic fell 11.5% to 1,611,447 passengers compared with July 2025.

Q: How did ASR’s Colombia operations perform in July 2026?

Colombia airports handled 1,599,287 passengers in July 2026, a 5.8% increase versus July 2025. Domestic traffic grew 7.8% to 1,220,098 passengers, while international traffic was essentially flat at 379,189 passengers, compared with 379,371 a year earlier.

Q: What were ASR’s July 2026 traffic results for San Juan Airport in Puerto Rico?

San Juan’s Luis Muñoz Marín International Airport handled 1,310,943 passengers in July 2026, a 5.1% decrease versus July 2025. Domestic traffic declined 5.1% to 1,116,082 passengers, and international traffic decreased 5.0% to 194,861 passengers.

Q: What is ASR’s year-to-date 2026 passenger traffic compared to 2025?

Year to date, ASUR recorded 42,597,919 passengers in 2026, a 0.6% decline versus 42,847,308 in 2025. Colombia contributed 10,379,077 passengers year to date, up 7.0%, while Mexico and San Juan posted modest declines.

Q: How did domestic and international traffic trend for ASR in July 2026?

Domestic traffic rose 2.3% to 4,198,234 passengers, while international traffic fell 9.1% to 2,185,497 passengers. This mix shift reflects domestic growth in Mexico and Colombia, alongside weaker international volumes, particularly in Mexico and Puerto Rico.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

6-K

Rhea-AI Filing Summary

Grupo Aeroportuario del Sureste (ASUR) reported that total passenger traffic in July 2026 was 6.4 million (6,383,731), a 1.9% decrease versus July 2025. Year to date, traffic reached 42,597,919 passengers, down 0.6% compared with the same period of 2025.

Regional trends diverged: Mexico handled 3,473,501 passengers in July, down 4.0%, and San Juan, Puerto Rico 1,310,943, down 5.1%. Colombia offset some of this with 1,599,287 passengers, a 5.8% increase. Domestic traffic grew 2.3% to 4,198,234 passengers, while international traffic declined 9.1% to 2,185,497 passengers.

Filing Explained

Cancún’s traffic fell 8.4% in July while Rionegro’s rose 3.5%, adding airport-level detail to ASUR’s mixed regional result.

The filing records passenger traffic for the completed period July 1–31, 2026 and year-to-date through July; transit and general aviation are excluded only from the Mexico and Colombia figures, defining the scope of this operating update.

Form 6-K is an interim report used by a foreign private issuer to furnish material information published in its home market; this filing presents ASUR’s passenger-traffic release as Exhibit 99.1.

At the airport level, the reported movement was uneven: Cancún total traffic was down 8.4% in July and Rionegro was up 3.5%; year to date, the same airports were down 5.2% and up 6.6%, respectively.

Key Figures

Total passengers July 2026: 6,383,731 passengers Total traffic year-on-year change July: 1.9% decrease Mexico passengers July 2026: 3,473,501 passengers +5 more

8 metrics

Total passengers July 2026 6,383,731 passengers Total traffic across Mexico, Puerto Rico, and Colombia in July 2026

Total traffic year-on-year change July 1.9% decrease Change in total passengers July 2026 versus July 2025

Mexico passengers July 2026 3,473,501 passengers Mexico traffic in July 2026, 4.0% decrease versus July 2025

Puerto Rico (San Juan) passengers July 2026 1,310,943 passengers San Juan Airport traffic in July 2026, 5.1% decrease year-on-year

Colombia passengers July 2026 1,599,287 passengers Colombia traffic in July 2026, 5.8% increase year-on-year

Year-to-date 2026 total traffic 42,597,919 passengers Combined traffic January–July 2026, 0.6% decrease versus 2025

Domestic vs international July 2026 4,198,234 domestic; 2,185,497 international Domestic up 2.3%, international down 9.1% versus July 2025

Colombia year-to-date 2026 traffic 10,379,077 passengers Colombia January–July 2026, 7.0% increase versus same period 2025

Key Terms

domestic traffic, international traffic, public–private partnership, FAA Pilot Program, +1 more

5 terms

domestic traffic financial

"In Colombia, domestic traffic increased 7.8% and international traffic remained flat"

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

"Mexico saw domestic traffic growth of 3.6% and a decrease of 11.5% 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.

public–private partnership regulatory

"San Juan Airport was the first and remains the only major airport in the U.S. to have successfully completed a public–private partnership"

FAA Pilot Program regulatory

"public–private partnership under the FAA Pilot Program"

ADS financial

"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.

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

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Available on EDGAR 08/05/2026 - 04:48 PM Accepted by SEC EDGAR 08/05/2026 - 04:48 PM

FAQ

What was Grupo Aeroportuario del Sureste (ASR)’s total passenger traffic in July 2026?

ASUR handled 6.4 million passengers (6,383,731) in July 2026, a 1.9% decrease versus July 2025. This figure aggregates Mexico, San Juan in Puerto Rico, and Colombia, excluding transit and general aviation passengers in Mexico and Colombia.

How did ASR’s Mexico passenger traffic perform in July 2026?

Mexico airports handled 3,473,501 passengers in July 2026, a 4.0% decline year-on-year. Within this, domestic traffic rose 3.6% to 1,862,054 passengers, while international traffic fell 11.5% to 1,611,447 passengers compared with July 2025.

How did ASR’s Colombia operations perform in July 2026?

Colombia airports handled 1,599,287 passengers in July 2026, a 5.8% increase versus July 2025. Domestic traffic grew 7.8% to 1,220,098 passengers, while international traffic was essentially flat at 379,189 passengers, compared with 379,371 a year earlier.

What were ASR’s July 2026 traffic results for San Juan Airport in Puerto Rico?

San Juan’s Luis Muñoz Marín International Airport handled 1,310,943 passengers in July 2026, a 5.1% decrease versus July 2025. Domestic traffic declined 5.1% to 1,116,082 passengers, and international traffic decreased 5.0% to 194,861 passengers.

What is ASR’s year-to-date 2026 passenger traffic compared to 2025?

Year to date, ASUR recorded 42,597,919 passengers in 2026, a 0.6% decline versus 42,847,308 in 2025. Colombia contributed 10,379,077 passengers year to date, up 7.0%, while Mexico and San Juan posted modest declines.

How did domestic and international traffic trend for ASR in July 2026?

Domestic traffic rose 2.3% to 4,198,234 passengers, while international traffic fell 9.1% to 2,185,497 passengers. This mix shift reflects domestic growth in Mexico and Colombia, alongside weaker international volumes, particularly in Mexico and Puerto Rico.

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 August 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: August 5, 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 July 2026

Passenger traffic increased year-on-year by 5.8% in Colombia and decreased by 4.0% in Mexico and 5.1% Puerto Rico

Mexico City, August 5, 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 total passenger traffic for July 2026 reached 6.4 million passengers, a 1.9% decrease compared to July 2025.

Passenger traffic showed a year-on-year increase of 5.8% in Colombia and decreases of 4.0% in Mexico and 5.1% in Puerto Rico. In Colombia, domestic traffic increased 7.8% and international traffic remained flat . Mexico saw domestic traffic growth of 3.6% and a decrease of 11.5% in international traffic, while Puerto Rico experienced decreases in domestic and international traffic of 5.1% and 5.0%, respectively.

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

Passenger Traffic Summary
	July		*% Chg*	Year to date		*% Chg*
	2025	2026	*% Chg*	2025	2026	*% Chg*
Mexico	3,617,941	3,473,501	(4.0)	24,579,607	23,922,904	(2.7)
Domestic Traffic	1,796,925	1,862,054	3.6	11,312,878	11,257,602	(0.5)
International Traffic	1,821,016	1,611,447	(11.5)	13,266,729	12,665,302	(4.5)
San Juan, Puerto Rico	1,381,674	1,310,943	(5.1)	8,570,856	8,295,938	(3.2)
Domestic Traffic	1,176,500	1,116,082	(5.1)	7,527,648	7,267,065	(3.5)
International Traffic	205,174	194,861	(5.0)	1,043,208	1,028,873	(1.4)
Colombia	1,511,049	1,599,287	5.8	9,696,845	10,379,077	7.0
Domestic Traffic	1,131,678	1,220,098	7.8	7,383,709	7,974,352	8.0
International Traffic	379,371	379,189	(0.0)	2,313,136	2,404,725	4.0
Total Traffic	6,510,664	6,383,731	(1.9)	42,847,308	42,597,919	(0.6)
Domestic Traffic	4,105,103	4,198,234	2.3	26,224,235	26,499,019	1.0
International Traffic	2,405,561	2,185,497	(9.1)	16,623,073	16,098,900	(3.2)

ASUR Page 1 of 3

Mexico Passenger Traffic
		July		*% Chg*	Year to date		*% Chg*
		2025	2026	*% Chg*	2025	2026	*% Chg*
Domestic Traffic		1,796,925	1,862,054	3.6	11,312,878	11,257,602	(0.5)
CUN	Cancun	921,781	917,079	(0.5)	5,740,454	5,428,856	(5.4)
CZM	Cozumel	25,030	25,279	1.0	148,899	151,635	1.8
HUX	Huatulco	63,803	63,572	(0.4)	387,109	376,052	(2.9)
MID	Merida	317,740	328,378	3.3	1,974,353	2,117,974	7.3
MTT	Minatitlan	14,470	12,421	(14.2)	89,105	79,511	(10.8)
OAX	Oaxaca	140,838	160,649	14.1	912,178	913,598	0.2
TAP	Tapachula	42,680	49,130	15.1	294,392	298,355	1.3
VER	Veracruz	152,204	170,890	12.3	967,503	1,036,042	7.1
VSA	Villahermosa	118,379	134,656	13.7	798,885	855,579	7.1
International Traffic		1,821,016	1,611,447	(11.5)	13,266,729	12,665,302	(4.5)
CUN	Cancun	1,709,759	1,492,358	(12.7)	12,373,539	11,738,180	(5.1)
CZM	Cozumel	27,524	25,565	(7.1)	265,627	256,465	(3.4)
HUX	Huatulco	2,712	2,606	(3.9)	99,718	110,823	11.1
MID	Merida	33,557	34,450	2.7	237,902	247,082	3.9
MTT	Minatitlan	921	998	8.4	4,460	5,201	16.6
OAX	Oaxaca	24,541	21,748	(11.4)	157,745	139,533	(11.5)
TAP	Tapachula	1,520	7,213	374.5	13,803	31,964	131.6
VER	Veracruz	16,333	17,650	8.1	88,439	94,447	6.8
VSA	Villahermosa	4,149	8,859	113.5	25,496	41,607	63.2
Traffic Total Mexico		3,617,941	3,473,501	(4.0)	24,579,607	23,922,904	(2.7)
CUN	Cancun	2,631,540	2,409,437	(8.4)	18,113,993	17,167,036	(5.2)
CZM	Cozumel	52,554	50,844	(3.3)	414,526	408,100	(1.6)
HUX	Huatulco	66,515	66,178	(0.5)	486,827	486,875	0.0
MID	Merida	351,297	362,828	3.3	2,212,255	2,365,056	6.9
MTT	Minatitlan	15,391	13,419	(12.8)	93,565	84,712	(9.5)
OAX	Oaxaca	165,379	182,397	10.3	1,069,923	1,053,131	(1.6)
TAP	Tapachula	44,200	56,343	27.5	308,195	330,319	7.2
VER	Veracruz	168,537	188,540	11.9	1,055,942	1,130,489	7.1
VSA	Villahermosa	122,528	143,515	17.1	824,381	897,186	8.8

US Passenger Traffic, San Juan Airport (LMM)
	July		*% Chg*	Year to date		*% Chg*
	2025	2026	*% Chg*	2025	2026	*% Chg*
SJU Total	1,381,674	1,310,943	(5.1)	8,570,856	8,295,938	(3.2)
Domestic Traffic	1,176,500	1,116,082	(5.1)	7,527,648	7,267,065	(3.5)
International Traffic	205,174	194,861	(5.0)	1,043,208	1,028,873	(1.4)

Colombia Passenger Traffic Airplan
		July		*% Chg*	Year to date		*% Chg*
		2025	2026	*% Chg*	2025	2026	*% Chg*
Domestic Traffic		1,131,678	1,220,098	7.8	7,383,709	7,974,352	8.0
MDE	Rionegro	856,611	900,732	5.2	5,586,822	6,013,831	7.6
EOH	Medellin	106,298	112,407	5.7	668,197	675,479	1.1
MTR	Monteria	119,535	153,381	28.3	801,111	943,723	17.8
APO	Carepa	15,478	15,889	2.7	101,314	106,997	5.6
UIB	Quibdo	30,435	34,896	14.7	195,116	218,026	11.7
CZU	Corozal	3,321	2,793	(15.9)	31,149	16,296	(47.7)
International Traffic		379,371	379,189	(0.0)	2,313,136	2,404,725	4.0
MDE	Rionegro	379,371	379,094	(0.1)	2,313,136	2,404,630	4.0
EOH	Medellin
MTR	Monteria	-	95	-	-	95	-
APO	Carepa	-	-		-	-
UIB	Quibdo	-	-		-	-
CZU	Corozal	-	-		-	-
Traffic Total Colombia		1,511,049	1,599,287	5.8	9,696,845	10,379,077	7.0
MDE	Rionegro	1,235,982	1,279,826	3.5	7,899,958	8,418,461	6.6
EOH	Medellin	106,298	112,407	5.7	668,197	675,479	1.1
MTR	Monteria	119,535	153,476	28.4	801,111	943,818	17.8
APO	Carepa	15,478	15,889	2.7	101,314	106,997	5.6
UIB	Quibdo	30,435	34,896	14.7	195,116	218,026	11.7
CZU	Corozal	3,321	2,793	(15.9)	31,149	16,296	(47.7)

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

Source: View Original Filing on SEC EDGAR

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EX-99.1 EXHIBIT 99.1 177.9 KB