Celanese Corporation Upsizes and Prices $1.4 Billion Senior Unsecured Notes Offering

Celanese Corporation (NYSE:CE) (the "Company" or "Celanese"), a global chemical and specialty materials company, today announced that its subsidiary, Celanese US Holdings LLC (the "Issuer"), has priced a registered offering (the "Offering") of $1.4 billion aggregate principal amount of notes, including $600 million aggregate principal amount of 7.000% Senior Notes due 2031 and $800 million aggregate principal amount of 7.375% Senior Notes due 2034 (together, the "Notes"). The Offering was upsized from $1.0 billion to $1.4 billion aggregate principal amount of Notes. The Notes will be guaranteed on a senior unsecured basis by the Company and certain of the Company's wholly-owned domestic subsidiaries.

The Offering is expected to close on or about December 17, 2025, subject to customary closing conditions. The net proceeds from the Offering will be used to repay the Company's remaining outstanding borrowings under its five-year term loan credit agreement due 2027, to fund the previously announced cash tender offers for a portion of the Issuer's outstanding 6.665% Senior Notes due 2027 and a portion of the Issuer's outstanding 6.850% Senior Notes due 2028, and for general corporate purposes, which may include the repayment of other outstanding indebtedness.

"Across 2025 we have executed on a number of transactions, including this Offering, to proactively manage our debt maturity profile and also enhance our liquidity position," said Chuck Kyrish, Senior Vice President and Chief Financial Officer. "We are aligning our debt maturities over the next few years to a conservative outlook for free cash flow generation and divestiture proceeds. We will provide a more comprehensive summary of the impact of this Offering and other associated transactions at completion in the coming weeks."

BofA Securities, Citigroup, Deutsche Bank Securities, HSBC and J.P. Morgan are acting as Joint Book-Running Managers for the offering of the Notes. When available, a copy of the preliminary prospectus supplement for the Notes may be obtained by contacting BofA Securities, Inc. at BofA Securities, NC1-004-03-43, 200 North College Street, 3rd floor, Charlotte NC 28255-0001, Attn: Prospectus Department, or by email at [email protected]. An electronic copy of the preliminary prospectus supplement and the accompanying base prospectus may also be obtained at no charge at the Securities and Exchange Commission's website at www.sec.gov.

This press release does not constitute an offer to sell or a solicitation of an offer to buy the securities described herein, nor shall there be any sale of these securities in any jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. The Offering may be made only by means of a prospectus and prospectus supplement meeting the requirements of Section 10 of the Securities Act of 1933, as amended. The Offering will be made pursuant to an effective shelf registration statement, which was previously filed by Celanese with the Securities and Exchange Commission, and a prospectus supplement for the Notes, which will be filed by Celanese with the Securities and Exchange Commission. This press release does not constitute an offer to purchase or a solicitation of an offer to sell the Issuer's 6.665% Senior Notes due 2027 or 6.850% Senior Notes due 2028 in the previously announced cash tender offers, and the tender offers are being made solely through a separate Offer to Purchase.

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 more than 11,000 employees worldwide with 2024 net sales of $10.3 billion.

Forward-Looking Statements

This release may contain "forward-looking statements," which include information concerning the Offering, and the Company's plans, objectives, goals, strategies, future revenues, cash flow, synergies, performance, capital expenditures and other information that is not historical information. When used in this release, the words "outlook," "forecast," "estimates," "expects," "anticipates," "projects," "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 results expressed or implied by the forward-looking statements contained in this release. These include the successful closing of the Offering, the successful completion of the concurrent tender offers referenced herein, and other information that is not historical information. Numerous other factors, many of which are beyond the Company's control, could cause actual results to differ materially from those expressed as forward-looking statements. Other risk factors include those that are discussed in the Company's filings with the Securities and Exchange Commission, including its most recent Annual Report on Form 10-K, any subsequently filed Quarterly Reports on Form 10-Q and any subsequently filed Current Reports on Form 8-K (other than, in each case, information that is furnished rather than filed). 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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Celanese Contacts:

Investor Relations

Bill Cunningham

+1 302 772 5231

[email protected]

Media Relations – Global

Jamaison Schuler

+1 972 443 4400

[email protected]

Media Relations Europe (Germany)

Petra Czugler

+49 69 45009 1206

[email protected]