NYSE AMERICAN TO COMMENCE DELISTING PROCEEDINGS WITH RESPECT TO AMBIPAR EMERGENCY RESPONSE’S ORDINARY SHARES AND WARRANTS (Form 6-K)

NYSE AMERICAN TO COMMENCE DELISTING PROCEEDINGS WITH RESPECT TO AMBIPAR EMERGENCY RESPONSE'S ORDINARY SHARES AND WARRANTS

São Paulo, Brazil - October 23, 2025 - Ambipar Emergency Response (the "Company") announced today that on October 22, 2025, it received a written notice from NYSE Regulation (the "NYSE Notice") stating that NYSE Regulation has determined to commence proceedings to delists the Company's Ordinary Shares and Warrants from NYSE American (the "Exchange").

Pursuant to the NYSE Notice, NYSE Regulation has determined that the Company is no longer suitable for listing and will commence delisting proceedings pursuant to Section 1003(c)(iii) of the NYSE American Company Guide. This decision comes as a result of the Company's disclosure, on October 21, 2025, of the filing of a Chapter 11 proceeding with the United States Bankruptcy Court for the Southern District of Texas, Houston Division.

The Company is considering whether it will require a review of this determination by a Committee of the Board of Directors of the Exchange as contemplated by the NYSE American delisting procedures.

The NYSE Notice does not affect the Company's business operations or its reporting obligations under the Securities and Exchange Commission regulations and rules.

About Ambipar Emergency Response

Ambipar Response specializes in environmental services, and operates in six main business units: emergency response, fire response, marine response, medical response, industrial response and environmental response. The Company is present in 41 countries across all six continents, providing standardized services across all regions.

The Company was founded in 1995 by Tércio Borlenghi Jr.

For more information, visit ambipar.com and http://ir-response.ambipar.com/

Forward-Looking Statements

This press release contains "forward-looking statements" within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are made only as of the date they first issued and are based on current expectations, estimates, forecasts and projections as well as the beliefs and assumptions of management. These statements identify prospective information and may include words such as "believe," "may," "will," "aim," "estimate," "continue," "anticipate," "intend," "expect," "forecast," "plan," "predict," "project," "potential," "aspiration," "objectives," "should," "purpose," "belief," and similar, or variations of, or the negative of such words and expressions, although not all forward-looking statements contain these identifying words.

Forward-looking statements are subject to a number of risks and uncertainties, many of which involve factors or circumstances that are beyond Ambipar Response's control.

Ambipar Response's actual results could differ materially from those stated or implied in forward-looking statements due to a number of factors, including but not limited to: more intense competition than expected, lower addition of new clients, regulatory measures, more investments in our business than expected, and our inability to execute successfully upon our strategic initiatives, among other factors described in "Item 3.D-Key Information--Risk Factors" of Ambipar Response's annual report on Form 20-F for the year ended December 31, 2024 and other public filings it makes with the Securities and Exchange Commission. Ambipar Response does not undertake any obligation to update or revise any forward-looking statements to reflect any change in its expectations with respect to such statements or any changes in events, conditions or circumstances after the date they were made, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

Investor Relations Contact:

Email: [email protected]