Company announces closure of Ulsan, South Korea facility to advance ‘Grow & Fortify' strategy

Celanese Corporation (NYSE:CE), a global specialty materials and chemical company, today announced a critical production network optimization step in support of the ‘Grow & Fortify' strategy of its Engineered Materials business. Over the past several years, Celanese has taken significant measures to ensure reliability of supply by investing in world-class compounding assets globally and by working to provide its customers with engineered materials products of superior quality, performance and reliability.

Today's network optimization announcement will result in the closure of the Company's Engineered Materials compounding facility in Ulsan, South Korea. Celanese is planning to cease all manufacturing and production operations at the Ulsan facility immediately. The Company intends to fully support its customers to fulfill all contractual obligations and ensure a smooth transition of production and compounding activities to other Celanese manufacturing locations in the region.

The production volumes from the Ulsan facility will be transferred to the Company's Nanjing and Shenzhen plants in China, and to its plant in Silvassa, India. Celanese is undertaking these actions to fortify the operating structure of its Engineered Materials business, while optimizing the company's cost and manufacturing production footprint to leverage its world-class compounding assets in Shenzhen, Nanjing and Silvassa. These actions are also expected to strengthen the Company's regional supply chain network.

Celanese products such as PET (Polyethylene Terephthalate), PA (Polyamide), PBT (Polybutylene Terephthalate) and HTN (High-Temperature Nylon) are critical to driving industry and regional growth. The broader Asia region represents opportunities for expansion, and Celanese is building manufacturing and compounding capabilities close to its customer base to better meet this growing demand.

About Celanese

Celanese is a global leader in chemistry, producing specialty material solutions used across most major industries and consumer applications. Our businesses use our chemistry, technology and commercial expertise to create value for our customers, employees and shareholders. We support sustainability by responsibly managing the materials we create and growing our portfolio of sustainable products to meet customer and societal demand. We strive to make a positive impact in our communities and to foster inclusivity across our teams. Celanese Corporation is a Fortune 500 company that employs approximately 11,000 employees worldwide with 2025 net sales of $9.5 billion.

Forward Looking Statements

This release may contain "forward-looking statements," which include information concerning the Company's plans, objectives, goals, strategies, future revenues, cash flow, operations, supply chains, financial condition and other information that is not historical information. When used in this release, the words "expects," "anticipates," "plans," "intends," "believes," "will," and variations of such words or similar expressions are intended to identify forward-looking statements. All forward-looking statements are based upon current expectations and beliefs and various assumptions. There can be no assurance that the Company will realize these expectations or that these beliefs will prove correct. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements contained in this release. Numerous factors, many of which are beyond the Company's control, could cause actual results to differ materially from those expressed as forward-looking statements. These factors include those that are discussed in the Company's filings with the Securities and Exchange Commission. Any forward-looking statement speaks only as of the date on which it is made, and the Company undertakes no obligation to update any forward-looking statements to reflect events or circumstances after the date on which it is made or to reflect the occurrence of anticipated or unanticipated events or circumstances.

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Investor Relations

Bill Cunningham

+1 972 443 4730

william.cunningham@celanese.com

Media Relations

Global

Jamaison Schuler

+1 972 443 4400

media@celanese.com

Media Relations

Asia

Maria Xia

+86 21 3861 9368

maria.xia@celanese.com

Media Relations

Europe

Petra Czugler

+49 69 45009 1206

petra.czugler@celanese.com

Celanese to Optimize Engineered Materials Compounding Footprint in Asia Region