Ambipar Emergency Response (AMBI-WT) parent enters judicial recovery process in Brazil

Rhea-AI Filing Summary

Ambipar Emergency Response reports that its parent company, Ambipar Participações e Empreendimentos S.A., has filed an initial proposal of a plan for judicial recovery (recuperação judicial) with the 3rd Corporate Court of the District of the Capital of the State of Rio de Janeiro in Brazil. This court-supervised process is taking place within the mandatory timeframe required under Brazilian rules.

The proposed Judicial Recovery Plan still needs approval from a general meeting of creditors and may be amended after discussions with those creditors. Ambipar Emergency Response continues to present itself as a global environmental services provider with six business units and operations in 41 countries.

Positive

• None.

Negative

• Ambipar Parent files Judicial Recovery Plan in Brazil, entering a court-supervised recovery process that depends on approval by a general meeting of creditors.

Insights

Cross-border credit and restructuring analyst

Parent company enters Brazilian judicial recovery, adding restructuring risk at group level.

The filing highlights that Ambipar Emergency Response’s parent, Ambipar Participações e Empreendimentos S.A., has submitted an initial Judicial Recovery Plan to a Brazilian corporate court. This indicates the parent is in a formal judicial recovery (recuperação judicial) process, conducted under Brazilian rules and overseen by the 3rd Corporate Court in Rio de Janeiro.

The plan is explicitly subject to approval by a general meeting of creditors and may change following negotiations with those creditors. This means the final terms are not yet defined and will depend on creditor discussions and voting outcomes. The document does not describe specific financial measures or impacts, so any effects on Ambipar Emergency Response will have to be assessed through future disclosures.

For now, the key concrete fact is the parent’s ongoing court-supervised recovery process, with creditor approval as the next major milestone for the Judicial Recovery Plan.

Form 6-K: How Foreign Companies Report to the SEC →

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 December 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  ☐

1

Filing of Initial Proposal of Judicial Recovery Plan by Ambipar Parent

São Paulo, Brazil – December 19, 2025 – Ambipar Emergency Response’s (the “Company”) parent company, Ambipar Participações e Empreendimentos S.A. (B3: AMBP3) (“Ambipar Parent”) filed an initial proposal of plan for the judicial recovery (recuperação judicial) with the 3rd Corporate Court of the District of the Capital of the State of Rio de Janeiro in Brazil (the “Judicial Recovery Plan”) within the mandatory timeframe required under Brazilian applicable rules. The Judicial Recovery Plan is subject to the approval by the general meeting of creditors and may be amended as a result of discussions with creditors.

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

2

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: December 19, 2025

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

FAQ

What did Ambipar Emergency Response disclose in this 6-K filing for AMBI-WT?

The company disclosed that its parent, Ambipar Participações e Empreendimentos S.A., filed an initial proposal of a plan for judicial recovery (recuperação judicial) with a Brazilian corporate court.

Which court is handling Ambipar Parent’s judicial recovery plan?

The initial proposal of the Judicial Recovery Plan was filed with the 3rd Corporate Court of the District of the Capital of the State of Rio de Janeiro in Brazil.

Is Ambipar Parent’s Judicial Recovery Plan already approved by creditors?

No. The filing states that the Judicial Recovery Plan is subject to approval by the general meeting of creditors and may be amended after discussions with them.

What business does Ambipar Emergency Response operate in?

Ambipar Emergency Response specializes in environmental services across six business units: emergency response, fire response, marine response, medical response, industrial response and environmental response, with a presence in 41 countries.

Does the filing specify changes to Ambipar Emergency Response’s operations after the judicial recovery proposal?

The text describes Ambipar Emergency Response’s global environmental services business and the parent’s Judicial Recovery Plan but does not state any specific operational changes for Ambipar Emergency Response.

Where can investors find more information about Ambipar Emergency Response (AMBI-WT)?

Investors are directed to visit ambipar.com and http://ir-response.ambipar.com/, and may also review Ambipar Response’s annual report on Form 20-F for risk factors.