Ambipar Emergency Response (AMBIQ) director files initial Form 3

Rhea-AI Filing Summary

Ambipar Emergency Response director David J. Mack filed an initial insider ownership report. This Form 3 identifies him as a director but shows no reported insider transactions and no listed derivative positions in the data provided, serving mainly as a baseline disclosure of his reporting status.

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

MACK DAVID J.

(Last) (First) (Middle)

410 PARK AVENUE, SUITE 900

(Street)

NEW YORK NEW YORK 10022

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Ambipar Emergency Response [ AMBIQ ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ David J. Mack	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does the Form 3 filed for Ambipar Emergency Response (AMBIQ) show?

The Form 3 identifies David J. Mack as a director of Ambipar Emergency Response. It serves as his initial insider ownership report and, in this instance, shows no insider transactions or derivative positions in the summarized data.

Who is the reporting person on Ambipar Emergency Response (AMBIQ) Form 3?

The reporting person is David J. Mack, listed as a director of Ambipar Emergency Response. The filing establishes his status as an insider subject to reporting obligations under Section 16 of U.S. securities laws.

Does the Ambipar Emergency Response (AMBIQ) Form 3 show any insider trades?

The summarized Form 3 data shows no reported insider trades for David J. Mack. Transaction counts for buys, sells, exercises, gifts, tax withholding, and restructurings are all zero in the transaction summary section.

Are there any derivative securities reported on the Ambipar Emergency Response (AMBIQ) Form 3?

The derivative section for David J. Mack is empty in this Form 3 data. The derivative summary shows no derivative transactions and no remaining derivative positions disclosed in this initial filing snapshot.

What is the purpose of this Ambipar Emergency Response (AMBIQ) Form 3 filing?

This Form 3 serves as an initial statement of beneficial ownership for director David J. Mack. It establishes him as an insider whose future trades and holdings may be reported on subsequent Forms 4 or 5 as required.