Active · per the CBE, 16 September 2026

INSIDIUM

BE0691675821

Rechtspersoon Private limited company 1 establishment

INSIDIUM is filed with the CBE under the catch-all “Overige zakelijke dienstverlening”, a code that says little about what the company actually does. Private Limited, started on 2 March 2018, 1 establishment.

Bundergaarde 6, 1970 Wezembeek-Oppem

Behind the company: Hubert KOTONSKI.

Active for

8 year, 6 months

Financials

Financial year 2025

INSIDIUM from Wezembeek-Oppem, company number BE0691675821, closed financial year 2025 with a result of € 72,395 after tax. For that financial year INSIDIUM recorded a gross margin of € 302,058 and equity of € 385,078. Compared with financial year 2024, the result moved from € 215,769 to € 72,395. The company is profitable. The company holds a healthy buffer. A strong own buffer against the debts. The most recent annual accounts were filed with the National Bank of Belgium on August 31, 2026.

What it is worth Healthy

€ 385,078

▼ 7% vs 2024

Assets minus debts, by the books. What is left if everything were sold and paid today.

Profit Healthy

€ 72,395

▼ 66% vs 2024

Profit after tax over the fiscal year.

Cash in the bank

€ 208,340

▼ 19% vs 2024

Cash and bank balances on the last day of the fiscal year.

Where the profit goes Pays out

€ 100,000 paid out

More than the year’s profit went to the shareholders; reserves fell.

People and assets in 2025

Wage cost

€ 36,513

▲ 6% vs 2024

Payroll staff only. What the director pays themselves is already netted into the gross margin and is not shown separately in the accounts.

Vehicles and equipment

€ 27,728

▼ 50% vs 2024

Book value of vehicles, furniture and equipment.

Debts at end 2025

Bank debt ≈ 3 years to go

€ 32,934

▼ 24% vs 2024

€ 10,819 is repaid this year. At this pace the long-term loan is gone in ≈ 3 years.

Owed to suppliers

€ 9,772

▼ 62% vs 2024

Supplier invoices still open on the last day of the fiscal year.

Taxes and wages

€ 135,804

▼ 18% vs 2024

Taxes, VAT and social contributions still to pay.

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Key figures per fiscal year Download key figures (CSV)
2022202320242025Change 2024 → 2025
Gross margin € 188,119 € 242,884 € 391,835 € 302,058 ▼ 23%
Profit after taxes € 113,278 € 153,739 € 215,769 € 72,395 ▼ 66%
Equity € 178,174 € 331,914 € 412,683 € 385,078 ▼ 7%
Total debts € 79,101 € 169,949 € 374,713 € 383,264 ▲ 2%
Cash € 168,059 € 285,955 € 257,204 € 208,340 ▼ 19%
Land & buildings - - € 190,000 € 190,000
Retained profit € 159,574 € 313,314 € 394,083 € 366,478 ▼ 7%
Dividend € 95,000 € 0 € 135,000 € 100,000 ▼ 26%
Bank debt € 0 € 53,194 € 43,287 € 32,934 ▼ 24%
Balance sheet total € 257,276 € 501,863 € 787,395 € 868,254 ▲ 10%

Key figures of INSIDIUM, fiscal years 2022 to 2025, from the annual accounts filed with the National Bank of Belgium.Next annual account (fiscal year 2026) expected before 31 July 2027.

What happened to INSIDIUM?

What happened at INSIDIUM in recent years, according to the Belgian Official Gazette, the CBE and the National Bank:

  • New annual accounts for financial year 2025: profit of € 72,395 (▼ 66% vs 2024). filed late Source: NBB ↗
  • New establishment in Wezembeek-Oppem. KBO
  • Start of the company according to the CBE. KBO

In short

From € 113,278 profit in 2022 to € 72,395 profit in 2025.

Paid € 230,942 in corporate taxes since 2022.

Best year ever: 2024, with € 215,769 profit.

Paid out € 330,000 in dividends to the owners in total.

Original PDFs at the National Bank ↗

A new publication or filing at INSIDIUM? We notify you, reason included.

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My folder 3 companies
  • De Lijn 8 June 2026 New annual account 2025

    filed on 8 June 2026

    What was left

    € 20 k ▼ 91%

    Money in the bank

    € 178 k ▼ 98%

    Open the dossier →

  • NMBS 8 June 2026 New annual account 2025 What was left ▼ 80%
  • bpost 18 May 2026 New annual account 2025 What was left from loss to profit
Real filings at the National Bank

Management

Hubert KOTONSKI
INSIDIUM
CONSTRUKTON
VAALTENBERG
ADURO BUILD

Behind INSIDIUM is Hubert KOTONSKI. Hubert KOTONSKI is also behind CONSTRUKTON, VAALTENBERG and ADURO BUILD.

See the full network in the app

Directors

According to the 2025 annual accounts

Hubert KOTONSKI

Director

Also active at: CONSTRUKTON, VAALTENBERG, ADURO BUILD

Establishments

Establishment units

Physical locations of this company

Registered office

Bundergaarde 6

1970 Wezembeek-Oppem

Who else lives here?

A building full of entrepreneurs or one very busy letterbox? Another 1 companies are registered at this address.

All companies at this address →

VAALTENBERG same network

€ 105,853 gross margin · 2025

What is an establishment unit? An establishment unit is a geographically identifiable place where activities of the enterprise are carried out.

Details

Company number
0691.675.821
VAT number
BE 0691.675.821
Registered office
Bundergaarde 6, 1970 Wezembeek-Oppem
Names & denominations
INSIDIUM
Enterprise type
Rechtspersoon
Legal form
Private limited company
Legal situation
Normale toestand
Start date
2 March 2018
Peppol
Active · Active since 18 Dec 2025
Activities · NACE

Overige zakelijke dienstverlening, neg

View on CBE Public ↗ Annual accounts (NBB) ↗

Frequently asked questions

What does INSIDIUM do?
INSIDIUM is filed with the CBE under the catch-all “Overige zakelijke dienstverlening”, a code that says little about what the company actually does. Private Limited, started on 2 March 2018, 1 establishment.
What is the address of INSIDIUM?
The registered office of INSIDIUM is located at Bundergaarde 6, 1970 Wezembeek-Oppem.
Is INSIDIUM still active?
Yes. According to the CBE (16 September 2026) INSIDIUM is active, legal situation “Normale toestand”, started on 2 March 2018.
Is INSIDIUM registered on Peppol?
Yes, INSIDIUM is registered on the Peppol network with ID 0208:0691675821.
What is the enterprise number of INSIDIUM?
The enterprise number of INSIDIUM is BE0691675821.
When was INSIDIUM founded?
INSIDIUM was founded on 2 March 2018.