Company lists · Data refreshed September 2026
Top 25 Ohs companies worldwide
RevenueBase identified 19,882 ohs companies worldwide as of September 2026 and tracks 173,682 professional contacts across them, including 31,784 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.
This list covers ohs companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026. Country and city lists for ohs companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest ohs companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,441 contacts → | ||||
Indirect evidence “Quirónprevención, perteneciente al Grupo Quirónsalud, es la mayor empresa del sector de la Prevención de Riesgos Laborales a nivel internacional.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,466 contacts → | ||||
Indirect evidence “O Grupo NPE é composto por empresas que oferecem soluções integradas para as necessidades da indústria: NPE Service, NPE Industrial, NPE Locação, NPE Facilities, NPE Construções e…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,018 contacts → | ||||
Indirect evidence “Empresa de Montajes Industriales Salfa S.A.(Salfa Montajes) was founded in 1993 as a subsidiary of SalfaCorp, a leading engineering, construction and real estate Company in Chile…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,577 contacts → | ||||
Indirect evidence “J.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,037 contacts → | ||||
Indirect evidence “Arco is the UK's only integrated services and safety products business.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 982 contacts → | ||||
Indirect evidence “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 895 contacts → | ||||
Indirect evidence “Pinchin Ltd.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 792 contacts → | ||||
Indirect evidence “Somos referência em saúde ocupacional e segurança do trabalho no Brasil, com mais de três décadas de experiência e 900 mil vidas assistidas.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 767 contacts → | ||||
Indirect evidence “Somos uma empresa de engenharia industrial especializada em serviços Onshore e Offshore, braço operacional do Grupo Azevedo & Travassos.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 751 contacts → | ||||
Indirect evidence “Arbo Unie is een groep gedreven professionals in de bedrijfsgezondheidszorg, die organisaties vooruit brengt.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 729 contacts → | ||||
Indirect evidence “Somos un Servicio de Prevención.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 727 contacts → | ||||
Indirect evidence “Compañía multinacional que brinda soluciones en operación servicios integrales y mantenimiento con altos estándares de seguridad.(ISO 9001 / ISO 14001 /ISO 45001)” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 662 contacts → | ||||
Indirect evidence “How do you keep employees healthy, safe and able to work over the long term?” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 604 contacts → | ||||
Indirect evidence “We are Canada's industrial safety service experts.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 600 contacts → | ||||
Indirect evidence “Fundada em 1994 na cidade de Americana-SP, no centro Região Metropolitana de Campinas,o Grupo MEDNET Medicina e Segurança do Trabalho dedica-se à prestação de serviços…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 570 contacts → | ||||
Indirect evidence “Com 28 anos de atuação, a RHMED|RHVIDA é pioneira no setor de medicina ocupacional e segurança do trabalho no Brasil.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 527 contacts → | ||||
Indirect evidence “Somos una IPS especializada en salud ocupacional que presta servicios en Medicina Preventiva y del Trabajo, con calidad, ética y confiabilidad a empresas y particulares, a través…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 419 contacts → | ||||
Indirect evidence “SHOES provides safety, health, operational, environmental and systems advice to small and medium sized organisation across Australia.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 410 contacts → | ||||
Indirect evidence “Medigold Health is one of the UK’s most respected and established providers of occupational health and wellbeing services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 383 contacts → | ||||
Indirect evidence “SGB-Cape is the largest industrial services company in Africa.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 371 contacts → | ||||
Indirect evidence “Grupo Preving es un grupo de empresas con vocación de liderazgo, en el que se integran un completo conjunto de disciplinas orientadas a mejorar la salud de los trabajadores y…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 358 contacts → | ||||
Indirect evidence “Looking to the future: The journey from NOSA to SafetyCloud Initially a free service to industry, NOSA was privatised in 2005, and in 2018, it was bought by the Carlyle Group…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 356 contacts → | ||||
Indirect evidence “Kenson is a Service Contractor to Oil and Gas Companies in the Energy Sector in Trinidad and Tobago.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 355 contacts → | ||||
Indirect evidence “Avonova er nordens ledende tilbyder av bedriftshelsetjenester.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 345 contacts → | ||||
Indirect evidence “Salute, Sicurezza, Ambiente e Qualità del prodotto: sei davvero sostenibile?” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: ohs companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names ohs companies.
- Partial evidence
- Its own public description names part of ohs companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name ohs companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 19,882 ohs companies worldwide
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Ohs companies worldwide at a glance
As of Sep 21, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among ohs companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for ohs companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “ohs companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names ohs companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among ohs companies, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 31,784 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Ohs companies by location
55 lists · largest firstEvery Ohs companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Ohs companies based in Brazil3,553
- Ohs companies based in the United States1,745
- Ohs companies based in Italy1,468
- Ohs companies based in the United Kingdom1,394
- Ohs companies based in Australia693
- Ohs companies based in Türkiye658
- Ohs companies based in Canada646
- Ohs companies based in France630
- Ohs companies based in Peru533
- Ohs companies based in Colombia529
- Ohs companies based in Germany524
- Ohs companies based in South Africa453
- Ohs companies based in Mexico429
- Ohs companies based in Argentina330
- Ohs companies based in the Netherlands316
- Ohs companies based in Spain296
- Ohs companies based in India231
- Ohs companies based in Chile191
- Ohs companies based in Portugal181
- Ohs companies based in Poland171
- Ohs companies based in Ecuador125
- Ohs companies based in Indonesia125
- Ohs companies based in the United Arab Emirates115
- Ohs companies based in Ireland106
- Ohs companies based in Sweden101
- Ohs companies based in New Zealand100
- Ohs companies based in Belgium80
- Ohs companies based in Switzerland78
- Ohs companies based in Norway77
- Ohs companies based in Malaysia73
- Ohs companies based in Romania54
- Ohs companies based in Hungary48
- Ohs companies based in Singapore48
- Ohs companies based in Denmark46
- Ohs companies based in Saudi Arabia46
- Ohs companies based in Austria28
- Ohs companies based in Greece27
Cities
- Ohs companies based in Sao Paulo, Brazil427
- Ohs companies based in Rio De Janeiro, Brazil137
- Ohs companies based in Curitiba, Brazil104
- Ohs companies based in Belo Horizonte, Brazil93
- Ohs companies based in Roma, Italy70
- Ohs companies based in Campinas, Brazil69
- Ohs companies based in Perth, Australia68
- Ohs companies based in Calgary, Canada67
- Ohs companies based in Porto Alegre, Brazil66
- Ohs companies based in Cape Town, South Africa52
- Ohs companies based in Milano, Italy50
- Ohs companies based in Sydney, Australia49
- Ohs companies based in Melbourne, Australia48
- Ohs companies based in Brisbane, Australia44
- Ohs companies based in Edmonton, Canada38
- Ohs companies based in Torino, Italy34
- Ohs companies based in Toronto, Canada30
- Ohs companies based in Bologna, Italy28
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names ohs companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many ohs companies are there worldwide?
RevenueBase identified 19,882 ohs companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Quirónprevención, headquartered in Madrid, tops this list with the largest team on record.
Which country has the most ohs companies?
Brazil leads with 3,553 companies, followed by the United States (1,745) and Italy (1,468). Every ohs companies list by country and city is linked on this page.
Which city has the most ohs companies?
Sao Paulo leads with 427 headquartered companies, followed by Lima (212) and Bogota (141).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 31,784 verified decision-maker contacts tracked across these 19,882 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.