# Companies in Montesson: 1,464 active companies, page 2

Updated November 7, 2026.

Biggest industries, 41 to 80 of 199, in the same order as page 1.

## The full lists

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- [Companies in Montesson, Yvelines](https://specstream.ai/data/france-companies/town/montesson-78418): 649 rows, every active company the pages name, at any registration date, in the Sirene stock dated 1 November 2026, $32.45, or the new rows each week for $19 a month. Buy: https://specstream.ai/data/france-companies/town/montesson-78418
- [Companies in Yvelines, France](https://specstream.ai/data/france-companies/department/78-yvelines): 59,628 rows, every active company the pages name, at any registration date, in the Sirene stock dated 1 November 2026, $676.28, or the new rows each week for $19 a month. Buy: https://specstream.ai/data/france-companies/department/78-yvelines

SpecStream is the live web data engine for teams and agents. It reads the Sirene register every month, and this page is that reading. Ask for the companies you track by industry, place or registration date and each new company arrives in your sheet, CRM, Slack or agent.

## Biggest industries, page 2

| Industry | NAF code | Active companies |
| --- | --- | --- |
| [Technical testing, analysis and inspection](https://specstream.ai/data/france-companies/industry/71-20b-technical-testing-analysis-and-inspection) | 71.20B | 6 |
| [Specialised design activities](https://specstream.ai/data/france-companies/industry/74-10z-specialised-design-activities) | 74.10Z | 6 |
| [General cleaning of buildings](https://specstream.ai/data/france-companies/industry/81-21z-general-cleaning-of-buildings) | 81.21Z | 6 |
| [Other personal service activities n.e.c.](https://specstream.ai/data/france-companies/industry/96-09z-other-personal-service-activities-n-e-c) | 96.09Z | 6 |
| [Construction of other buildings](https://specstream.ai/data/france-companies/industry/41-20b-construction-of-other-buildings) | 41.20B | 5 |
| [Floor and wall covering](https://specstream.ai/data/france-companies/industry/43-33z-floor-and-wall-covering) | 43.33Z | 5 |
| [Wholesale of miscellaneous industrial supplies and equipment](https://specstream.ai/data/france-companies/industry/46-69b-wholesale-of-miscellaneous-industrial-supplies-and-equipment) | 46.69B | 5 |
| [Retail sale via mail order houses with specialised catalogue](https://specstream.ai/data/france-companies/industry/47-91b-retail-sale-via-mail-order-houses-with-specialised-catalogue) | 47.91B | 5 |
| [Long-distance road freight transport](https://specstream.ai/data/france-companies/industry/49-41a-long-distance-road-freight-transport) | 49.41A | 5 |
| [Other activities auxiliary to financial services, except insurance and pension funding, n.e.c.](https://specstream.ai/data/france-companies/industry/66-19b-other-activities-auxiliary-to-financial-services-except-insurance-and) | 66.19B | 5 |
| [Activities of insurance agents and brokers](https://specstream.ai/data/france-companies/industry/66-22z-activities-of-insurance-agents-and-brokers) | 66.22Z | 5 |
| [Other business support service activities n.e.c.](https://specstream.ai/data/france-companies/industry/82-99z-other-business-support-service-activities-n-e-c) | 82.99Z | 5 |
| [Adult continuing education](https://specstream.ai/data/france-companies/industry/85-59a-adult-continuing-education) | 85.59A | 5 |
| [Beauty treatment](https://specstream.ai/data/france-companies/industry/96-02b-beauty-treatment) | 96.02B | 5 |
| [Plastering](https://specstream.ai/data/france-companies/industry/43-31z-plastering) | 43.31Z | 4 |
| [Wholesale of timber and construction materials](https://specstream.ai/data/france-companies/industry/46-73a-wholesale-of-timber-and-construction-materials) | 46.73A | 4 |
| [Hotels and similar accommodation](https://specstream.ai/data/france-companies/industry/55-10z-hotels-and-similar-accommodation) | 55.10Z | 4 |
| [Publishing of application software](https://specstream.ai/data/france-companies/industry/58-29c-publishing-of-application-software) | 58.29C | 4 |
| [Trusts, funds and similar financial entities](https://specstream.ai/data/france-companies/industry/64-30z-trusts-funds-and-similar-financial-entities) | 64.30Z | 4 |
| [Legal activities](https://specstream.ai/data/france-companies/industry/69-10z-legal-activities) | 69.10Z | 4 |
| [Dental practice activities](https://specstream.ai/data/france-companies/industry/86-23z-dental-practice-activities) | 86.23Z | 4 |
| [Physical well-being activities](https://specstream.ai/data/france-companies/industry/96-04z-physical-well-being-activities) | 96.04Z | 4 |
| [Bakeries and bakery-pastry shops](https://specstream.ai/data/france-companies/industry/10-71c-bakeries-and-bakery-pastry-shops) | 10.71C | 3 |
| [Production of electricity](https://specstream.ai/data/france-companies/industry/35-11z-production-of-electricity) | 35.11Z | 3 |
| [Roof covering with tiles and slates](https://specstream.ai/data/france-companies/industry/43-91b-roof-covering-with-tiles-and-slates) | 43.91B | 3 |
| [Wholesale of electronic and telecommunications equipment and parts](https://specstream.ai/data/france-companies/industry/46-52z-wholesale-of-electronic-and-telecommunications-equipment-and-parts) | 46.52Z | 3 |
| [Wholesale of miscellaneous supplies and equipment for trade and services](https://specstream.ai/data/france-companies/industry/46-69c-wholesale-of-miscellaneous-supplies-and-equipment-for-trade-and-servic) | 46.69C | 3 |
| [Other retail sale in non-specialised stores](https://specstream.ai/data/france-companies/industry/47-19b-other-retail-sale-in-non-specialised-stores) | 47.19B | 3 |
| [Retail sale of automotive fuel in specialised stores](https://specstream.ai/data/france-companies/industry/47-30z-retail-sale-of-automotive-fuel-in-specialised-stores) | 47.30Z | 3 |
| [Dispensing chemist in specialised stores](https://specstream.ai/data/france-companies/industry/47-73z-dispensing-chemist-in-specialised-stores) | 47.73Z | 3 |
| [Retail sale of flowers, plants, seeds, fertilisers, pet animals and pet food in specialised stores](https://specstream.ai/data/france-companies/industry/47-76z-retail-sale-of-flowers-plants-seeds-fertilisers-pet-animals-and-pet-fo) | 47.76Z | 3 |
| [Other miscellaneous specialised retail sale](https://specstream.ai/data/france-companies/industry/47-78c-other-miscellaneous-specialised-retail-sale) | 47.78C | 3 |
| [Retail sale of food via stalls and markets](https://specstream.ai/data/france-companies/industry/47-81z-retail-sale-of-food-via-stalls-and-markets) | 47.81Z | 3 |
| [Book publishing](https://specstream.ai/data/france-companies/industry/58-11z-book-publishing) | 58.11Z | 3 |
| [Publishing of journals and periodicals](https://specstream.ai/data/france-companies/industry/58-14z-publishing-of-journals-and-periodicals) | 58.14Z | 3 |
| [Data processing, hosting and related activities](https://specstream.ai/data/france-companies/industry/63-11z-data-processing-hosting-and-related-activities) | 63.11Z | 3 |
| [Management of buildings and other real estate](https://specstream.ai/data/france-companies/industry/68-32a-management-of-buildings-and-other-real-estate) | 68.32A | 3 |
| [Architectural activities](https://specstream.ai/data/france-companies/industry/71-11z-architectural-activities) | 71.11Z | 3 |
| [Vehicle technical inspection](https://specstream.ai/data/france-companies/industry/71-20a-vehicle-technical-inspection) | 71.20A | 3 |
| [Miscellaneous professional, scientific and technical activities](https://specstream.ai/data/france-companies/industry/74-90b-miscellaneous-professional-scientific-and-technical-activities) | 74.90B | 3 |

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Source: [INSEE, base Sirene des entreprises et de leurs établissements, on data.gouv.fr](https://www.data.gouv.fr/datasets/base-sirene-des-entreprises-et-de-leurs-etablissements-siren-siret). Licence Ouverte / Open Licence 2.0 (Etalab), source INSEE. Counts are of active companies in the Sirene register stock dated 1 November 2026: commercial companies (SARL, SAS, SA and the like) and civil companies such as SCI property companies. Sole traders, associations and public bodies are not counted, and the register lists dormant holding and property companies as active, so a count is of companies on the register, not of trading businesses. A company is counted under its main activity (NAF rev. 2 code) and the commune of its head office; companies whose register entry holds no NAF rev. 2 code are in the totals only. "With employees" means the register holds an employee band of one or more. Industry titles are English renderings of the INSEE labels. Contains data from INSEE, reused under the Licence Ouverte 2.0. This page is not endorsed by INSEE.

Free to reuse with credit to SpecStream under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).