SOUTHEAST AIRPORT GROUP (ASR) director reports 12,000 Series B shares via ADS holding

Rhea-AI Filing Summary

SOUTHEAST AIRPORT GROUP director Guillermo Ortiz Martinez filed an initial ownership report showing a holding of Series B Shares. The filing reports beneficial ownership of 12,000 Series B Shares, held in the form of American Depositary Shares. The position is equivalent to 1,200 ADS, with each ADS representing ten Series B Shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Ortiz Martinez Guillermo Mr

Role Director

Type	Security	Shares	Price	Value
holding	Series B Shares	--	--	--

Holdings After Transaction: Series B Shares — 12,000 shares (Direct)

Footnotes (1)

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Key Figures

Series B Shares owned: 12,000 shares ADS equivalent: 1,200 ADS ADS share ratio: 10 Series B shares per ADS

3 metrics

Series B Shares owned 12,000 shares Beneficial ownership following reported position

ADS equivalent 1,200 ADS ADS representing underlying Series B Shares

ADS share ratio 10 Series B shares per ADS Conversion rate between ADS and Series B Shares

Key Terms

American Depositary Shares, ADS, Series B Shares

3 terms

American Depositary Shares financial

"The securities reported herein are held in the form of American Depositary Shares ("ADS"), in this case equivalent to 1,200 ADS."

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

ADS financial

"The securities reported herein are held in the form of American Depositary Shares ("ADS"), in this case equivalent to 1,200 ADS."

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.

Series B Shares financial

"Each ADS represent ten Series B shares."

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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1. Name and Address of Reporting Person^*

Ortiz Martinez Guillermo Mr

(Last) (First) (Middle)

BOSQUE DE ALISOS 47A PISO 4

BOSQUES DE LAS LOMAS

(Street)

CUAJIMALPA DISTRITO FEDERAL 05120

(City) (State) (Zip)

MEXICO

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/31/2026

3. Issuer Name and Ticker or Trading Symbol
SOUTHEAST AIRPORT GROUP [ ASR ]

3a. Foreign Trading Symbol
[ASUR]

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Series B Shares	12,000(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The securities reported herein are held in the form of American Depositary Shares ("ADS"), in this case equivalent to 1,200 ADS. Each ADS represent ten Series B shares.

	/s/ Ortiz Martinez Guillermo	03/31/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does the ASR Form 3 filing for Guillermo Ortiz Martinez show?

The Form 3 shows that director Guillermo Ortiz Martinez beneficially owns 12,000 Series B Shares of SOUTHEAST AIRPORT GROUP. These are held through American Depositary Shares, establishing his initial disclosed equity position as an insider of the company.

How many shares does Guillermo Ortiz Martinez hold in ASR according to the Form 3?

He holds 12,000 Series B Shares as reported in the Form 3. This figure represents his total direct beneficial ownership following the reported position, providing a baseline for any future insider trading disclosures.

How are Guillermo Ortiz Martinez’s ASR holdings structured between shares and ADS?

His holdings are structured as American Depositary Shares that represent underlying Series B Shares. The filing explains that 12,000 Series B Shares correspond to 1,200 ADS, with each ADS representing ten shares, clarifying the depositary share conversion relationship.

Does the ASR Form 3 show any recent insider buying or selling activity?

The Form 3 does not report any specific buy or sell transactions. It functions as an initial ownership statement, simply listing the existing holding of 12,000 Series B Shares equivalent to 1,200 ADS for disclosure purposes.

What is the significance of American Depositary Shares in the ASR Form 3 filing?

The Form 3 notes that the securities are held as American Depositary Shares, or ADS. It specifies that 1,200 ADS equal 12,000 Series B Shares, helping investors understand how the foreign-listed equity is represented and traded in U.S. markets.