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CNAE 4391-6/00 · Brazil

Obras de fundações

2,618 active companies in the Brazilian CNPJ registry have this CNAE as their main activity. Look up companies and explore their distribution by state and city.

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

What this list shows

We count each active company in the Brazilian CNPJ registry once, by its head office 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.

Active companies
2,618
555th of 1,329 activities
Opened in 12 months
200
+5.8% · 591st by openings
Of every 100 companies in the country
0.0
do this activity
Openings per 100 active
8
in the country: 21

Active companies in this activity

More active establishments and higher registered capital first. This order is not a quality assessment or recommendation.

Look up companies in this activity (up to 300)

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.

Where the companies are

Acre: 2 companies, 0.0 of every 100 active companies there Alagoas: 5 companies, 0.0 of every 100 active companies there Amapá: 0 companies, 0.0 of every 100 active companies there Amazonas: 17 companies, 0.0 of every 100 active companies there Bahia: 103 companies, 0.0 of every 100 active companies there Ceará: 42 companies, 0.0 of every 100 active companies there Distrito Federal: 45 companies, 0.0 of every 100 active companies there Espírito Santo: 53 companies, 0.0 of every 100 active companies there Goiás: 93 companies, 0.0 of every 100 active companies there Maranhão: 31 companies, 0.0 of every 100 active companies there Mato Grosso: 56 companies, 0.0 of every 100 active companies there Mato Grosso do Sul: 28 companies, 0.0 of every 100 active companies there Minas Gerais: 276 companies, 0.0 of every 100 active companies there Pará: 74 companies, 0.0 of every 100 active companies there Paraíba: 12 companies, 0.0 of every 100 active companies there Paraná: 230 companies, 0.0 of every 100 active companies there Pernambuco: 62 companies, 0.0 of every 100 active companies there Piauí: 18 companies, 0.0 of every 100 active companies there Rio de Janeiro: 214 companies, 0.0 of every 100 active companies there Rio Grande do Norte: 20 companies, 0.0 of every 100 active companies there Rio Grande do Sul: 134 companies, 0.0 of every 100 active companies there Rondônia: 11 companies, 0.0 of every 100 active companies there Roraima: 4 companies, 0.0 of every 100 active companies there Santa Catarina: 145 companies, 0.0 of every 100 active companies there São Paulo: 914 companies, 0.0 of every 100 active companies there Sergipe: 7 companies, 0.0 of every 100 active companies there Tocantins: 12 companies, 0.0 of every 100 active companies there

Weight in each federative unit: of every 100 active companies, how many have this main activity

  1. 0.0
  2. 0.0
  3. 0.0
  4. 0.0
  5. 0.0

Federative units with the most companies

  1. 1 São Paulo 914
  2. 2 Minas Gerais 276
  3. 3 Paraná 230
  4. 4 Rio de Janeiro 214
  5. 5 Santa Catarina 145
  6. 6 Rio Grande do Sul 134
  7. 7 Bahia 103
  8. 8 Goiás 93
  9. 9 Pará 74
  10. 10 Pernambuco 62
See the 26 federative units
  1. 11 Mato Grosso 56
  2. 12 Espírito Santo 53
  3. 13 Distrito Federal 45
  4. 14 Ceará 42
  5. 15 Maranhão 31
  6. 16 Mato Grosso do Sul 28
  7. 17 Rio Grande do Norte 20
  8. 18 Piauí 18
  9. 19 Amazonas 17
  10. 20 Paraíba 12
  11. 21 Tocantins 12
  12. 22 Rondônia 11
  13. 23 Sergipe 7
  14. 24 Alagoas 5
  15. 25 Roraima 4
  16. 26 Acre 2

Cities with the most companies

active companies by head office

  1. 1 São Paulo (SP) 350
  2. 2 Belo Horizonte (MG) 76
  3. 3 Rio de Janeiro (RJ) 73
  4. 4 Curitiba (PR) 51
  5. 5 Brasília (DF) 45
  6. 6 Goiânia (GO) 43
  7. 7 Belém (PA) 38
  8. 8 Porto Alegre (RS) 38
  9. 9 Fortaleza (CE) 28
  10. 10 Londrina (PR) 28
See the 30 cities
  1. 11 São José do Rio Preto (SP) 24
  2. 12 Salvador (BA) 23
  3. 13 Campinas (SP) 22
  4. 14 Recife (PE) 21
  5. 15 Campos dos Goytacazes (RJ) 21
  6. 16 Guarulhos (SP) 21
  7. 17 Uberlândia (MG) 20
  8. 18 Ribeirão Preto (SP) 20
  9. 19 Barueri (SP) 17
  10. 20 Cuiabá (MT) 17
  11. 21 Serra (ES) 16
  12. 22 São José dos Campos (SP) 16
  13. 23 Ponta Grossa (PR) 16
  14. 24 Niterói (RJ) 15
  15. 25 Cotia (SP) 15
  16. 26 Palhoça (SC) 15
  17. 27 Campo Grande (MS) 15
  18. 28 Aparecida de Goiânia (GO) 15
  19. 29 Natal (RN) 14
  20. 30 Maringá (PR) 14

What activity 4391-6/00 is

  1. Section F — Construção
  2. Division — Serviços especializados para construção
  3. Group — Outros serviços especializados para construção
  4. Class — Obras de fundações

What it covers

  • A execução de fundações diversas para edifícios e outras obras de engenharia civil, inclusive a cravação de estacas
  • A execução de reforço de fundações para edifícios e outras obras de engenharia civil
  • O aluguel, com operador, de equipamentos para execução de fundações

What it does not cover

Typical activities

  • Alicerces e blocos de fundação, construção de
  • Baldrames, construção de
  • Edificações e estruturas, perfuração (construção) para
  • Estacas para fundações (strauss, franki, simplex, metálicas, pré moldadas, raiz, mega, prensada, moldadas in-loco), cravação de
  • Estacas (raiz, trado, tipo franki, pré moldadas, strauss), obras de cravação de
  • Estaqueamento (fundação por estacas)
  • Fundação (fundações) por tubulão (tubulões), execução de
  • Fundações contínuas, construção de
  • Fundações diversas para edifícios e outras obras de engenharia, execução de
  • Fundações em estacas escavadas, construção de
  • Fundações em estacas hélice contínuas, construção de
  • Fundações em estacas raiz, construção de
See the other 17 typical activities
  • Fundações em sapatas combinadas, construção de
  • Fundações indiretas ou profundas, construção de
  • Fundações isoladas, construção de
  • Fundações para edificações e outras obras de engenharia civil (construção), execução de
  • Fundações profundas, construção de
  • Fundações rasas ou diretas, construção de
  • Fundações, reforço de
  • Fundações tipo sapatas, construção de
  • Jet grouting, construção de
  • Locação de bate-estacas com operador
  • Locação de equipamentos de perfuração (perfuratrizes) para execução de fundações com operador
  • Perfurações e execução de fundações destinadas a construção civil
  • Radiers, construção de
  • Sapatas ou fundações diretas, construção de
  • Serviços de estaqueamento ou cravação de estacas
  • Tubulão encamisado a ar comprimido, execução de
  • Tubulão encamisado a céu aberto, execução de

Source: IBGE, CNAE 2.3 and its explanatory notes

Frequently asked questions about CNAE 4391-6/00

How many CNAE 4391-6/00 companies are there in Brazil?

2,618 active companies have CNAE 4391-6/00 as their main activity, according to the Receita Federal's October 2026 publication. It is 555th among the country's activities by companies.

Which federative unit has the most companies in this activity?

São Paulo, with 914. There, 0.0 of every 100 active companies have this main activity, against 0.0 in the national registry.

Does this total include branches and secondary activities?

No. Each active company is counted once, by its head office and registered main activity. A company may carry out this activity as a secondary activity and be excluded from the count. Geographic distribution uses the registered location; records without a recognized federative unit may be counted nationally without appearing in local groups.

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 in the Brazilian CNPJ registry with this as their main activity, counted once by head office. Location is taken from the registry. Where available, openings are for the last 12 months, compared with the previous 12 months.