Vault-13

AMBIPAR EMERGENCY RESPONSE AMBIQ

CL A ORD SHS · Common Stock · CUSIP G02532102

5 institutional holders +0 vs Q2 2025
178,856178.9k shares reported held*
$142.5kreported value*
2 new 0 added 2 reduced 1 sold out net sold ≈ $340.0k (-424.9k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $0.80.

Trends to Q3 2025

Institutional holders

Managers reporting a position, each quarter

0510Q1 23: 4Q2 23: 6Q3 23: 8Q4 23: 6Q1 24: 7Q2 24: 7Q3 24: 5Q4 24: 7Q1 25: 7Q2 25: 5Q3 25: 55Q1 23Q3 23Q1 24Q3 24Q1 25Q3 25
Numbers
QuarterHolders
Q1 20234
Q2 20236
Q3 20238
Q4 20236
Q1 20247
Q2 20247
Q3 20245
Q4 20247
Q1 20257
Q2 20255
Q3 20255

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
505Q4 23: 3 bought or addedQ4 23: 3 cut or sold outQ1 24: 1 bought or addedQ1 24: 3 cut or sold outQ1 24Q2 24: 1 bought or addedQ2 24: 3 cut or sold outQ3 24: 0 bought or addedQ3 24: 5 cut or sold outQ3 24Q4 24: 2 bought or addedQ4 24: 1 cut or sold outQ1 25: 2 bought or addedQ1 25: 4 cut or sold outQ1 25Q2 25: 1 bought or addedQ2 25: 2 cut or sold outQ3 25: 2 bought or addedQ3 25: 3 cut or sold outQ3 25
Numbers
QuarterBought or addedCut or sold out
Q4 202333
Q1 202413
Q2 202413
Q3 202405
Q4 202421
Q1 202524
Q2 202512
Q3 202523

Biggest buyers

Turim 21 Investimentos Ltda. New +108,800+108.8k
FNY Investment Advisers, LLC New +45,800+45.8k

Biggest sellers

Constellation Investimentos e Participacoes Ltda Sold out -571,051-571.1k
NORTHERN TRUST CORP Reduced -6,165-6.2k
SPX Gestao de Recursos Ltda Reduced -2,300-2.3k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Riva Ridge Capital Management LP 13G · passive investor new · filed 2025-11-05 7.1% new 1.2m 2025-11-05

Insider purchases and sales in Q3 2025

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported in Q3 2025.

Holders, Q3 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Turim 21 Investimentos Ltda. 0.03% of their portfolio RIO DE JANEIRO, D5 108,800108.8k $87.1k $87.1k 0.03% New
2 FNY Investment Advisers, LLC 0.01% of their portfolio NEW YORK, NY 45,80045.8k $36.0k $36.0k 0.01% New
3 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 17,61317.6k $14.1k $14.1k 0.00% Reduced -6.2k -6,165
4 SPX Gestao de Recursos Ltda 0.00% of their portfolio RIO DE JANEIRO, D5 6,6426.6k $5.3k $5.3k 0.00% Reduced -2.3k -2,300
5 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 11 $1 $1 0.00% Unchanged