C07503-2026

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)
Oct 19, 2026
2. SEC Identification Number
39274
3. BIR Tax Identification No.
000-506-020-000
4. Exact name of issuer as specified in its charter
ACEN CORPORATION
5. Province, country or other jurisdiction of incorporation
Makati City, Philippines
6. Industry Classification Code(SEC Use Only)
7. Address of principal office
35th Floor Ayala Triangle Gardens Tower 2, Paseo de Roxas corner Makati Avenue, Makati City Postal Code 1226
8. Issuer's telephone number, including area code
(02) 7730 6300
9. Former name or former address, if changed since last report
N/A
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 Shares 39,969,736,051
Series A Preferred Shares 8,341,500
Series B Preferred Shares 16,658,500
11. Indicate the item numbers reported herein
Other Matters

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.

ACEN CORPORATIONACEN

PSE Disclosure Form 4-31 - Press Release References: SRC Rule 17 (SEC Form 17-C)
Section 4.4 of the Revised Disclosure Rules

Subject of the Disclosure

TÜV Rheinland Philippines puts sustainability standards into practice through ACEN RES partnership

• TÜV Rheinland Philippines, Inc. partners with ACEN RES to transition its Makati City facility to 100% renewable energy.
• The switch is enabled through the government's Retail Competition and Open Access (RCOA) program.
• The partnership supports the testing and certification provider’s global sustainability objectives by reducing operational carbon emissions.
Background/Description of the Disclosure

19 October 2026 — TÜV Rheinland Philippines, Inc., a testing, inspection, and certification service provider, is putting its sustainability principles into practice by transitioning its main office operations to 100% renewable energy through a partnership with ACEN RES.

The move enables the company to reduce emissions from its local operations while reinforcing its commitment to the environmental standards it helps organizations uphold.

Located in Magallanes, Makati City, the TÜV Rheinland Philippines main office, made the switch under the government’s Retail Competition and Open Access (RCOA) framework, which allows qualified contestable consumers with high electricity demand to choose their own energy suppliers and source renewable energy based on their sustainability and operational requirements.

By sourcing its electricity directly from ACEN’s portfolio of renewable energy projects, the company aims to minimize its environmental impact and align its local operations with global corporate sustainability standards.

"As a company dedicated to safety, quality, and environmental standards, practicing what we audit is a core operational priority," said Tristan Arwen "Bobbit" Loveres, Managing Director of TÜV Rheinland Philippines. "Switching to pure renewable energy for our Makati facility allows us to directly lower our carbon footprint, ensuring that our corporate practices reflect the exact sustainability and environmental compliance standards we verify for our clients."

"We are glad to support TÜV Rheinland Philippines in achieving its environmental targets through the RCOA program," said Tony Valdez, Senior Vice President and head of market transformation and retail at ACEN. "Providing reliable, renewable power to organizations that uphold global quality standards reinforces our commitment to scaling up the country's green energy capacity and helping businesses build sustainable operations."
Other Relevant Information

About ACEN RES

ACEN RES is the retail electricity unit of ACEN, the Ayala group’s listed energy company and one of the fastest-growing renewable energy companies in Asia Pacific, with the Philippines as its core and largest market. It also has a significant presence in Australia, Vietnam, India, and Lao PDR, along with strategic investments in Indonesia and other markets. The company currently has 7.5 GW of attributable renewable energy capacity spanning projects in operation, under construction and with signed agreements.

As a developer, builder, and operator, ACEN leverages its agility and collaborative approach to accelerate the energy transition. The company has 100% renewable energy generation and aims to achieve Net Zero greenhouse gas emissions by 2050—turning bold ambitions into real impact for businesses, communities, and indigenous groups.

About TÜV Rheinland Philippines

TÜV Rheinland is a leading provider of testing and inspection services worldwide. For over 150 years, the company has helped make the world a safer place. Today, more than 29,000 employees test, inspect and certify products, plants and processes, while also providing training for people in a wide range of professions. Operating from 500 locations in more than 50 countries, TÜV Rheinland helps safeguard key areas of business and everyday life. Headquartered in Cologne and generating annual revenue of close to €3 billion, the company plays a key role in quality assurance worldwide. TÜV Rheinland has been a member of the UN Global Compact since 2006, demonstrating its commitment to anti-corruption and sustainability.

www.tuv.com


For inquiries and more information, please contact:

Irene Maranan
Head – Corporate Communications and Sustainability
Email: [email protected]


DISCLAIMER: This disclosure may contain forward-looking statements that are subject to risk factors and opportunities that may affect ACEN’s plans to complete the transaction/s subject of this disclosure. Each forward-looking statement is made only as of the date of this disclosure. Outcomes of the subject transaction may differ materially from those expressed in the forward-looking statements included in this disclosure.
Filed on behalf by:
Name Candy Dacanay-Datuon
Designation Assistant Vice President