Rue du Moulin 31
Activity behind the registrations
Each of the 12 active companies here has staff, fixed assets or another address.
Main activities
2 different activities across 12 of the 12 companies registered now.
Companies at this address
12 in total| Company | At this address | Outcome |
|---|---|---|
| Big4 & Partners
BE 0438.992.009 Founded in 1989 · total assets €510,183 (2025) · group |
Registered office
since 12-1989 shared directorunit elsewhere |
Active here |
| Mattax Accounting
BE 0744.443.821 Founded in 2020 · 7.8 FTE (2025) · group |
Registered office
since 02-2020 unit elsewhere |
Active here |
| Mattax Accounting Charleroi
BE 0886.316.813 Founded in 2007 · total assets €105,839 (2025) · group |
Registered office
since 01-2007 shared directorunit elsewhere |
Active here |
| Mattax Accounting Rixensart
BE 1010.847.391 Founded in 2024 · 3 FTE (2025) · group |
Registered office
since 06-2024 shared directorunit elsewhere |
Active here |
| Mattax Advisory
BE 1034.577.947 Founded in 2026 |
Registered office
since 02-2026 unit elsewhere |
Active here |
| Mattax Bruxelles Sud
BE 0444.658.886 Founded in 1991 · total assets €214,818 (2024) · group · accounts filed late |
Registered office
since 07-1991 unit elsewhere |
Active here |
| Mattax Finex 4U
BE 1011.889.647 Founded in 2024 · total assets €698,885 (2025) · group |
Registered office
since 07-2024 unit elsewhere |
Active here |
| Mattax LLN
BE 0885.886.746 Founded in 2006 · 6.9 FTE (2025) · group |
Registered office
since 12-2006 unit elsewhere |
Active here |
| Mattax Real Estate
BE 0805.187.003 Founded in 2023 · total assets €979,883 (2025) · negative equity |
Registered office
since 08-2023 shared directorunit elsewhere |
Active here |
| Mattax Seco & Partner'S
BE 0427.549.868 Founded in 1985 · 0.6 FTE (2026) |
Registered office
since 01-2026 unit elsewhere |
Active here |
| MirFinances
BE 1002.222.113 Founded in 2023 · total assets €4.6m (2025) |
Registered office
since 11-2023 shared directorunit elsewhere |
Active here |
| NY.T Management
BE 1007.167.133 Founded in 2024 · total assets €70,462 (2025) |
Registered office
since 03-2024 unit elsewhere |
Active here |
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The building
cadastre and 3D survey- Footprint
- 149 m²
- measured, the ground under the building
- Floor area (estimate)
- ~310 m²
- 2 storeys, estimated from the building volume
- Per current company
- ~26 m²
- Height
- 7.1 metres
- Volume
- 919 m³
- Plot
- 4,248 m²
The buildings come from the cadastre and the 3D survey (LiDAR), the box numbers from the BEST address register and the heritage from the regional registers. A registration says who is based here, not who owns it.
Registrations and outcomes per year
Address of a group of related companies
12 companies are registered here now. 11 of the 12 companies are tied to one another, most likely as one group or family of companies. , the group's parent company, is registered here. They are tied as follows: 8 in the group, 9 named Mattax and 5 with a shared director. The building has about 310 m² of floor space, about 26 m² per company.
- This address has more companies than 99% of Belgian addresses, which have at most ten.
- 12 have their registered office here, 0 only an establishment or branch. A registered office is the legal address; where work happens is registered as an establishment.
- 5 of the 12 companies share a current director with another company here. The largest group has 5.
- Half of the current companies have been registered here for less than 3.1 years.
- This address had 2 new registrations in the last twelve months (6 in three years).
Recommendations
- Open the network from this address to see which directors connect the companies.
- Assess a company at this address together with its group. Its dossier shows the structure and related companies.
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Method and limits of this check
A shared address is not suspicious in itself. Office buildings, accountants and business centres host many companies. The verdict is about the kind of address, not about any individual company.
The comparison rests on all 1,408,687 active Belgian addresses. Half of them have one company, 95% at most five, 99% at most ten and 99.9% at most 35.
The list of an address holds the companies in the KBO register and those that left it since April 2026. A company that stopped before then is not in it. So the bankruptcies at this address are shown as counts. The comparison with Belgium runs over the postcode, for the same founding years and after the same number of years. It comes from the survival tables, which start from the founding deeds in the Belgian Official Gazette and count the companies that stopped too.
A shared director holds a current board mandate at two companies at this address. Statutory auditors and liquidators do not count.
Floor area and storeys are not measured anywhere. So the building shows them as estimates, next to the measured footprint. No register of building use (office, housing) is available.
Sources: KBO (companies, addresses, activities and legal situation), Belgian Official Gazette (judgments), BOSA BEST (addresses and box numbers), cadastre and 3D survey (parcels and buildings).
Source: KBO (Kruispuntbank van Ondernemingen) · Belgian Official Gazette · BOSA BEST · Cadastre/LiDAR. Last updated: 11-11-2026.