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ALTSYS

ActiveSIREN number 453 824 930Limited liability company (SARL)Est. 200470.20 · Business and other management consultancy activitiesMontesson, Île-de-France
Official record (Annuaire des entreprises) ↗
Age22 years
older than 90% of its sector
Same activity, France217,843live companies · 20748th oldest
In Montesson1,599live companies · 120 in the same activity
At this address145live companies incl. this one

In brief

ALTSYS is a limited liability company (SARL) registered in France on 6 May 2004. At 22 years old it is older than 90% of the 217,843 live companies whose main activity is business and other management consultancy activities. Its registered office is in Montesson, Yvelines, Île-de-France, at an address shared with 144 other live companies. 120 live companies in Montesson share the same main activity.

Register details

Registered nameALTSYS
SIREN number453 824 930
Company typeLimited liability company (SARL)
Registered office5 Rue Du Chant Des Oiseaux, 78360 Montesson
Nature of business (NACE Rev. 2.1 (French NAF 2025))70.20 Business and other management consultancy activities
International sector (ISIC Rev.4)M · 70 Activities of head offices; management consultancy activities

Timeline

Register events, newest first.

  • Incorporated

Register entries

From the register.

Incorporated6 May 2004

Business and other management consultancy activities in France

Live companies whose main activity is 70.20: 217,843 in total, median age 6 years, 21,515 incorporated in the past 12 months.

All 217,843 companies
This company's decadeOther decades
050,000100,000150,000200,0001900s: 871900s1910s: 21910s1940s: 21940s1950s: 711950s1960s: 771960s1970s: 2621970s1980s: 2,1331980s1990s: 9,2871990s2000s: 29,7712000s2010s: 59,4262010s2020s: 116,7252020s
Incorporated per year, still live
010,00020,00030,00040,0002011: 4,34520112012: 4,2412013: 4,52620132014: 4,6862015: 5,17120152016: 5,9342017: 7,38820172018: 8,5832019: 10,10720192020: 10,9622021: 14,12220212022: 15,8602023: 16,51620232024: 19,4982025: 22,43220252026: 17,3332027: 22027

Location

Registered office in Montesson, Yvelines, Île-de-France.

Live companies in Montesson1,599
Same activity in Montesson120
Live companies in Yvelines151,787
New in Montesson, past 12 months82

Also registered at this address

144 other live companies share this registered office; shown are those incorporated closest in time to this one.

Similar companies

Live companies with the same main activity, nearest first.

Compare all
KC
KEY CONSULTSLévis-Saint-Nom, Île-de-France
Number 453 557 258Est. 2004
PS
PRAGMA SURF CONSEILHouilles, Île-de-France
Number 453 493 983Est. 2004
RS
REBEVAL SARLBailly, Île-de-France
Number 453 557 282Est. 2004
CP
CYPERS PRODUCTIONEcquevilly, Île-de-France
Number 478 657 232Est. 2004
C
CASOARVersailles, Île-de-France
Number 453 612 608Est. 2004
CC
CAP CONSEILVersailles, Île-de-France
Number 453 434 920Est. 2004

Sources

Register data: Insee, Sirene database of companies and establishments (Licence Ouverte / Open Licence 2.0), delivery of 21 October 2026. Territories: Insee, Code officiel géographique 2026. Industry names: European Union, EU Vocabularies (NACE Rev. 2.1). Context figures are computed by FirmsDB from these sources. This page is not an official register; check the company's entry in the French government business directory before relying on it.