CNAE 4321-5/00 · Piauí

Instalação e manutenção elétrica in Piauí

2,237 active companies are headquartered in Piauí with this CNAE as their main activity. They represent 0.7% of Brazil's active companies with the same main activity.

Source: Receita Federal, CNPJ Open Data · October 2026 publication

The same activity in Brazil 328,370

What this list shows

We count each active company once, by its head office in this state and this CNAE as its main activity. Branches and secondary activities are excluded from this scope. The total describes the registry, not market revenue or company quality.

Companies in Piauí: 2,237; 0.7% of Brazil's
Of every 100 companies in Piauí: 1.0; do this activity
Among Brazil's federative units: 23rd; by companies in this activity

Active companies in Piauí

More active establishments and higher registered capital first. This order is not a quality assessment or recommendation. · page 1 of 10

KV INSTALACOES COMERCIO E INDUSTRIA LTDATeresina (PI)
ENERGEL CONSTRUCOES LTDAFloriano (PI)
NETLUX INSTALACOES COMERCIO E INDUSTIA LTDATeresina (PI)
MS ENGENHARIA ELETRICA LTDAPicos (PI)
MAIS SOL ENGENHARIA LTDAPicos (PI)
A QUEIROGA CASSIMIRO JUNIOR ENERGIA LTDATeresina (PI)
J12 SOLAR LTDACorrente (PI)
DINAMICA ENERGETICA LTDATeresina (PI)
ECOSOLAR ENERGIA E SOLUCOES INTEGRADAS LTDATeresina (PI)
GERAWATTS ENGENHARIA LTDATeresina (PI)
HERTZ EMPREENDIMENTOS ELETRICOS LTDATeresina (PI)
NETLUX SOLAR LTDATeresina (PI)
BBS ENERGIA SOLAR & ENGENHARIA LTDAOeiras (PI)
SIM ENGENHARIA E ENERGIAS RENOVAVEIS LTDATeresina (PI)
CRUZ SOUSA ENERGIA LTDATeresina (PI)
LSMX ENGENHARIA E COMERCIO DE MATERIAL ELETRICO LTDATeresina (PI)
SILVA E RIBEIRO ENGENHARIA LTDAElesbão Veloso (PI)
S F DINIZ NETO LTDATeresina (PI)
ANTONIO DE OLIVEIRA SILVA LTDAEsperantina (PI)
ELETRON SOLAR LTDAOeiras (PI)
BRASIL AGRO LTDAFloriano (PI)
AC SOLAR E CONSTRUTORA LTDAPiripiri (PI)
SOLIS PIAUI SISTEMA DE ENERGIA LTDATeresina (PI)
CONECTA PROJETOS E SERVICOS ELETRICOS LTDATeresina (PI)
SOBRAL SERVICOS DE CONSTRUCOES E LOCACAO DE MAO DE OBRA LTDATeresina (PI)
ESB ENERGIA E EQUIPAMENTOS LTDATeresina (PI)
ECO SISTEMAS SOLUCOES LTDATeresina (PI)
CSX EMPREENDIMENTOS E SERVICOS LTDATeresina (PI)
M T DE C NETO SOLUCOES ENERGETICAS E CONSTRUCAO LTDAValença do Piauí (PI)
V P E ENGENHARIA SOLAR LTDATeresina (PI)

List limited to 300 companies, 30 per page. Looking for a specific company? Search by name or CNPJ.

How to assess a company's data

When you open a company's record, use these guides to check the data and understand what each field can establish.

How to look up a CNPJ
Check identifiers, dates and registry fields against official sources.
What an active CNPJ means
Active status does not show that a company is debt-free, licensed or able to operate.
How to read partner and administrator records
Understand QSA roles and the limits on ownership and representation information.

How much the activity weighs

of every 100 active companies, how many do this activity

Piauí1.0
Brazil1.2

In Piauí, the activity weighs less than in Brazil.

Piauí's cities with the most companies in this activity

active companies and each city's share of the state

1 Teresina 49.3% 1,103
2 Parnaíba 6.8% 153
3 Floriano 3.6% 80
4 Picos 3.0% 68
5 Altos 1.8% 41
6 Campo Maior 1.7% 38
7 Piripiri 1.5% 34
8 José de Freitas 1.4% 31
9 Oeiras 1.3% 28
10 Bom Jesus 1.2% 27

20 more cities

Class 4321-5 in Piauí

instalações elétricas, by subclass

Close to this: 4322-3/01 · Instalações hidráulicas, sanitárias e de gás, 264 companies in Piauí.

What activity 4321-5/00 is

A instalação, alteração, manutenção e reparo em todos os tipos de construções de: #- sistemas de eletricidade (cabos de qualquer tensão, fiação, materiais elétricos, etc.) #- cabos para instalações telefônicas e de comunicações #- cabos para redes de informática e televisão a cabo, inclusive por fibra óptica #- antenas coletivas e parabólicas #- pára-raios #- sistemas de iluminação #- sistemas de alarme contra incêndio #- sistemas de alarme contra roubo #- sistemas de controle eletrônico e automação predial
A instalação de equipamentos elétricos para aquecimento

See everything this activity covers

Frequently asked questions

How many companies have main CNAE 4321-5/00 in Piauí?

2,237 active companies have CNAE 4321-5/00 as their main activity in Piauí, according to the Receita Federal's October 2026 publication. That is 1.0 of every 100 companies there, against 1.2 in Brazil.

Which of Piauí's cities has the most companies in this activity?

Teresina, with 1,103, 49.3% of the state's companies in this activity.

Why can this total differ from the companies operating in this state?

This scope counts active companies by their head office and registered main activity. A company may operate in this state through a branch or carry out the activity as a secondary activity and be excluded from the count. The registered address and CNAE do not establish every operating location or service.

Does active status mean a company is qualified for a contract?

No. Active status describes the Receita Federal registration. It does not establish tax compliance, creditworthiness, licences, ability to fulfil a contract or quality. Check the relevant official documents and the contract's requirements.

How we count

Active companies with this as their main activity, counted by head office in Piauí.