Ambipar Emergency Response files Chapter 11; parent seeks recovery

Rhea-AI Filing Summary

Ambipar Emergency Response reported that on October 20, 2025 its parent, Ambipar Participações e Empreendimentos S.A., and Environmental ESG Participações S.A. filed a request for judicial recovery with the Third Business Court of the Capital of Rio de Janeiro. On the same date, the Company filed a concurrent action under Chapter 11 with the United States Bankruptcy Court for the Southern District of Texas, Houston Division.

The Company states it is maintaining normal operations across its six service units and geographies, emphasizing service continuity, employee mobilization, and ongoing customer support. Management characterizes the court-supervised processes as a responsible and transparent step for the Ambipar Group. The Company plans to keep shareholders informed as developments occur.

Positive

• None.

Negative

• Material financial distress: concurrent Chapter 11 filing and parent’s judicial recovery signal significant restructuring risk.

Insights

Distressed debt & restructuring analyst

Court-supervised restructurings initiated in Brazil and the U.S.

Ambipar Emergency Response disclosed parallel processes: a Brazilian judicial recovery for its parent/ESG and a concurrent Chapter 11 action in the Southern District of Texas. These frameworks typically allow a stay of creditor actions while a restructuring plan is formulated and negotiated.

The Company indicates operations continue across business lines and geographies, suggesting service delivery is intended to remain uninterrupted during proceedings. Actual outcomes will depend on court approvals and agreements with stakeholders under the respective procedures.

The disclosure names the courts and jurisdictions but does not detail liabilities, proposed plans, or timelines. Subsequent filings may provide terms of any restructuring plan, treatment of obligations, and any actions affecting equity or intercompany arrangements.

FAQ

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What did AMBI disclose in this 6-K?

The Company reported that its parent and ESG filed for judicial recovery in Rio de Janeiro and that the Company filed a concurrent action under Chapter 11 in the Southern District of Texas.

Does Ambipar Emergency Response say operations will continue?

Yes. It states operations continue normally across its business units and geographies while proceedings are underway.

Which courts are involved in Ambipar’s restructuring steps?

Brazil: Third Business Court of the Capital of Rio de Janeiro. U.S.: United States Bankruptcy Court for the Southern District of Texas, Houston Division.

Why pursue judicial recovery and Chapter 11?

The Company characterizes these steps as a responsible, prudent, and transparent approach to manage the Ambipar Group’s situation under court supervision.

Will shareholders receive further updates from AMBI?

Yes. The Company states it will keep shareholders and the market informed about developments.

What businesses does Ambipar Emergency Response operate?

Six units: emergency, fire, marine, medical, industrial, and environmental response, operating in 41 countries across six continents.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 10/21/2025 - 07:32 AM Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of October 2025

Commission File Number: 001-41638

AMBIPAR EMERGENCY RESPONSE

(Exact name of registrant as specified in its charter)

Avenida Angélica, nº 2346, 5th Floor

São Paulo, São Paulo, Brazil, 01228-200

Tel: +55 (11) 3526-3526

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F  ☒             Form 40-F  ☐

Ambipar Parent and the Company file for court-supervised insolvency protection.

São Paulo, Brazil – October 21, 2025 – Ambipar Emergency Response (the “Company”) informs the market that on October 20, 2025, its parent company, Ambipar Participações e Empreendimentos S.A. (B3: AMBP3) (“Ambipar Parent”) and Environmental ESG Participações S.A. (“ESG”) filed a request for judicial recovery (recuperação judicial) with the Third Business Court of the Capital of Rio de Janeiro (the “Request for Judicial Recovery”). The Company further informs that on the same date it has filed a concurrent action under section 101(24) of Title 11 of the United States Bankruptcy Code (“Chapter 11”) with United States Bankruptcy Court for the Southern District of Texas, Houston Division.

The filing of the Request for Judicial Recovery and Chapter 11 reflects the responsible, prudent, and transparent approach that has historically guided the conduct of the Ambipar Group’s business.

The Company maintains its operations normally and continues to offer excellent services, with safety, efficiency and reliability, in all its segments. Its employees remain fully mobilized, sustaining thousands of direct and indirect jobs, generating social impact and stimulating economic activity.

The Company shall keep its shareholders and the market informed about the development of the matters subject to this Form 6-K.

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: ir.response@ambipar.com

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 21, 2025

	AMBIPAR EMERGENCY RESPONSE
	By:	/s/Thiago da Costa Silva
	Name:	Thiago da Costa Silva
	Title:	Director