SECURITIES AND EXCHANGE COMMISSIONSEC FORM 17-C

CURRENT REPORT UNDER SECTION 17
OF THE SECURITIES REGULATION CODE
AND SRC RULE 17.2(c) THEREUNDER

1. Date of Report (Date of earliest event reported)

Dec 17, 2025

2. SEC Identification Number

21817

3. BIR Tax Identification No.

000-530-631

4. Exact name of issuer as specified in its charter

PT&T Corp.

5. Province, country or other jurisdiction of incorporation

Philippines

6. Industry Classification Code(SEC Use Only)

7. Address of principal office

Spirit of Communications Center 106 Carlos Palanca St., Legaspi Village, Makati City Postal Code 1229

8. Issuer's telephone number, including area code

0287268888

9. Former name or former address, if changed since last report

PHILIPPINE TELEGRAPH & TELEPHONE CORPORATION

10. Securities registered pursuant to Sections 8 and 12 of the SRC or Sections 4 and 8 of the RSA

Title of Each Class	Number of Shares of Common Stock Outstanding and Amount of Debt Outstanding
Common Stock @ PhP 1.00 par value	1,500,000,000

11. Indicate the item numbers reported herein

Item 9. Other Events

The Exchange does not warrant and holds no responsibility for the veracity of the facts and representations contained in all corporate disclosures, including financial reports. All data contained herein are prepared and submitted by the disclosing party to the Exchange, and are disseminated solely for purposes of information. Any questions on the data contained herein should be addressed directly to the Corporate Information Officer of the disclosing party.

PT&T Corp.PTT

PSE Disclosure Form 4-2 - Acquisition/Disposition of Shares of Another Corporation
References: SRC Rule 17 (SEC Form 17-C) and
Section 4.4 of the Revised Disclosure Rules

Subject of the Disclosure
Disposition of a portion of PT&T Corp.’s (PT&T) equity interest in SecureLink Networks Incorporated (SecureLink) to Netlinkz Global Services (AUST & NZ) PTY Limited (Netlinkz)
Background/Description of the Disclosure
SecureLink is a joint venture company incorporated in the Philippines with PT&T and Netlinkz, an Australian company, as its principal shareholders. Prior to the transaction, PT&T is the majority owner with 51% equity in SecureLink while Netlinkz is the minority owner with 49% equity. The transaction involves the disposition by PT&T of its 293,854 shares in SecureLink to its joint venture partner, Netlinkz. As a result of the transaction, PT&T’s ownership interest in SecureLink decreased to 49.9%, while Netlinkz ownership interest increased to 50.1%.

Date of Approval by Board of Directors	Dec 12, 2025

Rationale for the transaction including the benefits which are expected to be accrued to the Issuer as a result of the transaction

The transaction strategically realigns the equity structure of SecureLink by allowing Netlinkz to assume majority ownership. This realignment is expected to facilitate growth initiatives, enhance technology partnerships, and strengthen SecureLink’s positioning in the cybersecurity and digital infrastructure sectors while allowing PT&T to retain a significant minority interest. The transaction will also enhance SecureLink’s ability to attract future capital and public interest as it expands its presence both locally and regionally which will be beneficial to PT&T and Netlinkz as the principal shareholders of SecureLink.

Details of the acquisition or disposition

Date	Dec 12, 2025

Manner
The acquisition is through the transfer of shares.
Description of the company to be acquired or sold
SecureLink is a joint venture company incorporated in the Philippines with PT&T and Netlinkz as its principal shareholders. SecureLink is a Value Added Service (VAS) provider registered with the National Telecommunications Commission. It is engaged in the provisioning of enterprise-grade cybersecurity solutions and managed connectivity services to Philippine enterprises.

The terms and conditions of the transaction

Number of shares to be acquired or disposed	293,854 shares
Percentage to the total outstanding shares of the company subject of the transaction	1.1
Price per share	PHP 1.00

Nature and amount of consideration given or received
Php 293,854.00 in cash representing the total par value of the shares transferred.
Principle followed in determining the amount of consideration
The amount of consideration was based on the par value of the shares transferred.
Terms of payment
The payment for the shares transferred was made in full in cash.
Conditions precedent to closing of the transaction, if any
None.
Any other salient terms
None.

Identity of the person(s) from whom the shares were acquired or to whom they were sold

Name	Nature of any material relationship with the Issuer, their directors/ officers, or any of their affiliates
Netlinkz Global Services (AUST & NZ) PTY Limited	Netlinkz Global Services (AUST & NZ) PTY Limited is the joint venture partner of PT&T in Securelink

Effect(s) on the business, financial condition and operations of the Issuer, if any
Following the transaction, PT&T remains a minority shareholder in SecureLink. The transaction is not expected to have a material adverse effect on the business, financial condition, or operations of PT&T.
Other Relevant Information
None.