Ambipar Emergency Response - Class A Ordinary Shares, par value $0.0001 per share (AMBIQ) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2023 to Q4 2025

Type / Class
Equity / Class A Ordinary Shares, par value $0.0001 per share
Symbol
AMBIQ on OTC
Shares outstanding
17,405,859
Price per share
$0.51
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
185,000
Total reported value
$100,486
% of total 13F portfolios
0%
Share change
+6,144
Value change
-$3,119
Number of holders
2
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Ambipar Emergency Response - Class A Ordinary Shares, par value $0.0001 per share (AMBIQ) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Riva Ridge Capital Management LP 7.1% $1,557,128 1,235,816 Riva Ridge Capital Management LP 29 Oct 2025

As of 31 Dec 2025, 2 institutional investors reported holding 185,000 shares of Ambipar Emergency Response - Class A Ordinary Shares, par value $0.0001 per share (AMBIQ). This represents 1.1% of the company’s total 17,405,859 outstanding shares.

Institutional Holders of Ambipar Emergency Response - Class A Ordinary Shares, par value $0.0001 per share (AMBIQ) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 185,000 $100,486 -$3,119 $0.51 2
2025 Q3 178,856 $142,458 -$2,753,139 $0.80 5
2025 Q2 603,772 $3,033,834 -$598,047 $5.02 4
2025 Q1 724,349 $3,592,771 +$381,864 $4.96 6
2024 Q4 647,357 $3,424,518 +$52,614 $5.29 6
2024 Q3 637,410 $3,741,597 -$300,733 $5.87 4
2024 Q2 688,778 $2,700,010 -$80,855 $3.92 6
2024 Q1 709,361 $3,759,614 -$116,865 $5.30 6
2023 Q4 731,411 $5,734,262 +$19,982 $7.84 5
2023 Q3 735,523 $5,089,820 -$483,465 $6.92 7
2023 Q2 748,478 $7,260,280 +$1,643,888 $9.70 5
2023 Q1 579,872 $4,772,318 +$4,772,318 $8.23 3