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Data / France companies / Essonne / Massy

Companies in Massy, Essonne: 3,420 active companies by industry

Updated November 7, 2026. Source: INSEE, base Sirene des entreprises et de leurs établissements, on data.gouv.fr.

3,420 active companies have their head office in Massy, Essonne, in the Sirene register stock dated 1 November 2026. 271 were registered in the last 12 months, 12 of them in October 2026, and 819 have employees.

The request: Every French company with head office in Massy, with SIREN, NAF code, registration date, address and employee band. $10 of work on sign-up, no card.

Get companies in MassyWatch new registrations in Massy

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.

  • 3,420Active companies
  • 271Registered in the last 12 months
  • 12Registered in October 2026
  • 819 (23.9%)With employees
  • EssonneDepartment
  • 91377Commune code

Registrations in the last 12 months

Active companies by the month their registration date falls in. The newest month is the last full month before the stock date.

MonthCompanies registered
October 202612
September 202622
August 202612
July 202625
June 202619
May 202617
April 202622
March 202623
February 202634
January 202632
December 202529
November 202524

Registrations per year

Companies registered in each year that are still active in the 1 November 2026 stock. Companies that closed earlier are not counted, so older years read low.

Year registeredActive companies
2022233
2023251
2024241
2025275
2026 so far218

By number of employees

The employee band the register holds for each company, as declared for its latest reference year.

EmployeesActive companiesShare
No employees or not declared2,60176.1%
1 to 9 employees59417.4%
10 to 49 employees1444.2%
50 to 249 employees591.7%
250 employees or more220.6%

Biggest industries

A link opens the industry in this town where 80 or more companies list it.

IndustryNAF codeActive companies
Renting of land and other real estate68.20B596
Computer systems and software consultancy62.02A181
Business and other management consultancy activities70.22Z165
Taxi operation49.32Z112
Engineering and technical consultancy71.12B95
Computer programming activities62.01Z78
Fund management activities66.30Z74
Fast-food restaurants56.10C70
Activities of holding companies64.20Z57
Activities of head offices70.10Z54
Renting of housing68.20A52
Local road freight transport49.41B51
Traditional restaurants56.10A49
Sale of cars and light motor vehicles45.11Z48
Electrical installation in all premises43.21A39
General masonry and building shell work43.99C30
Adult continuing education85.59A30
Water and gas installation in all premises43.22A28
Real estate agencies68.31Z28
Hairdressing96.02A28
Combined office administrative service activities82.11Z27
Construction of detached houses41.20A26
Long-distance road freight transport49.41A25
Management of buildings and other real estate68.32A25
General food stores47.11B23
General cleaning of buildings81.21Z23
Non-specialised wholesale trade46.90Z22
Trusts, funds and similar financial entities64.30Z22
Buying and selling of own real estate68.10Z18
Heating and air conditioning installation43.22B17
Painting and glazing43.34Z17
Other business support service activities n.e.c.82.99Z17
Wholesale of electronic and telecommunications equipment and parts46.52Z16
Retail sale via mail order houses with specialised catalogue47.91B16
Publishing of application software58.29C16
Accounting, bookkeeping and auditing activities; tax consultancy69.20Z16
Retail sale via mail order houses with general catalogue47.91A15
Beverage serving activities56.30Z15
General medical practice activities86.21Z15
Beauty treatment96.02B15

Newest registered companies

Newest first. Only companies with a name that is clearly a business are listed; the counts above include every active company. Each row links to the public record.

CompanySIRENRegisteredNAF codeSource
Alessync13163666415 October 202662.02Aannuaire-entreprises.data.gouv.fr
Armp Conseils13145618813 October 202670.22Zannuaire-entreprises.data.gouv.fr
Optimist1310930805 October 202670.10Zannuaire-entreprises.data.gouv.fr
Cabinet de Psychologie Louahidi1310713752 October 202686.90Fannuaire-entreprises.data.gouv.fr
Mazalito1311133341 October 202670.10Zannuaire-entreprises.data.gouv.fr
SLS Audit & Conseil13082047528 September 202670.22Zannuaire-entreprises.data.gouv.fr
Alevinh13076937524 September 202666.30Zannuaire-entreprises.data.gouv.fr
Vdkthan13070911624 September 202682.11Zannuaire-entreprises.data.gouv.fr
AM Transport13050914422 September 202649.32Zannuaire-entreprises.data.gouv.fr
Amsel13023591417 September 202670.22Zannuaire-entreprises.data.gouv.fr
ABA Immobilier1301565089 September 202668.20Bannuaire-entreprises.data.gouv.fr
Ehaingo1303854617 September 202646.19Bannuaire-entreprises.data.gouv.fr

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. Spot a wrong value? Write to [email protected] with the link to this page.