Riva Ridge Capital Management LP - 29 Oct 2025 SCHEDULE 13G Report for Ambipar Emergency Response Class A Ordinary Shares, par value $0.0001 per share (AMBI)

Filing manager
Riva Ridge Capital Management LP
Reporting owner
Riva Ridge Capital Management LP
Security
Ambipar Emergency Response Class A Ordinary Shares, par value $0.0001 per share
Beneficially owned shares
1,235,816 shares
Ownership signal CIK-linked ownership evidence from parsed SEC filings. 2 signals
Large-stake signal

Form

SCHEDULE 13G

Passive or exempt beneficial ownership filing.

Ownership

7.1%

Beneficial ownership of this reported class.

Shares

1,235,816 shares

Shares beneficially owned as disclosed.

Event date

29 Oct 2025

Date tied to the ownership event or amendment.

Accepted by SEC

05 Nov 2025

EDGAR acceptance date.

How to read this large-stake filing
  • Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
  • Compare this filing with the holder history and issuer page before treating the percentage as a current position.
  • Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership
7.1%
Subject security Names, identifiers, and filing context for this profile. 2 source fields
Symbol
AMBI
Shares outstanding
17,405,859 shares
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
SCHEDULE 13G
Accepted by SEC
05 Nov 2025, 19:19:48 UTC
Event date
29 Oct 2025
Source filing
View source filing

Key filing fact

Riva Ridge Capital Management LP disclosed 7.1% ownership in Ambipar Emergency Response Class A Ordinary Shares, par value $0.0001 per share (AMBI) on 29 Oct 2025.

Key facts

  • Riva Ridge Capital Management LP filed SCHEDULE 13G for Ambipar Emergency Response Class A Ordinary Shares, par value $0.0001 per share (AMBI).
  • Disclosed ownership: 7.1%.
  • Date of event: 29 Oct 2025.

Change

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 05 Nov 2025, 19:19.

Research use

  • This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
  • Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

View source filing

Reporting persons

Disclosed reporting parties (5)

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name Ownership Shares owned Sole voting power Shared voting power Signature Title CIK
Riva Ridge Capital Management LP 7.1% 1,235,816 0 1,235,816 /s/ Stephen Golden* Stephen Golden / Managing Member of the General Partner
Riva Ridge Master Fund, Ltd. 7.1% 1,235,816 0 1,235,816 /s/ Stephen Golden* Stephen Golden / Director
Riva Ridge GP LLC 7.1% 1,235,816 0 1,235,816 /s/ Stephen Golden* Stephen Golden / Managing Member
Stephen Golden 7.1% 1,235,816 0 1,235,816 /s/ Stephen Golden* Stephen Golden
Peter Finelli 7.1% 1,235,816 0 1,235,816 /s/ Peter Finelli* Peter Finelli
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