Active · per the CBE, 2 October 2026

THESYS

BE0866425378

Rechtspersoon Private limited company 1 establishment

THESYS is an IT company in Ukkel. Private Limited, started on 19 July 2004, 1 establishment.

Vergeet-mij-nietjesstraat 52, 1180 Ukkel

Behind the company: Marc Kestemont.

Active for

22 year, 2 months

Financials

Financial year 2025

THESYS from Ukkel, company number BE0866425378, closed financial year 2025 with a result of € 18,561 after tax. For that financial year THESYS recorded a gross margin of € 90,695 and equity of € 21,017. Compared with financial year 2024, the result moved from € 2,024 to € 18,561. Profitable, and profit is growing. The buffer is growing. Debts are under control. The most recent annual accounts were filed with the National Bank of Belgium on June 10, 2026.

What it is worth Growing

€ 21,017

▲ € 18,561 vs 2024

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

Profit Growing

€ 18,561

▲ € 16,537 vs 2024

Profit after tax over the fiscal year.

Cash in the bank

€ 52,583

▲ 147% vs 2024

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

Where the profit goes Growing

Stays in the company

No dividend for 2025. Retained profit grew to € 10,917.

People and assets in 2025

Full-time equivalents estimate

≈ 1

No payroll staff. One director, so that person most likely runs the business.

Wage cost

€ 64,890

▲ 28% 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

€ 1,747

▲ 1% vs 2024

Book value of vehicles, furniture and equipment.

Debts at end 2025

Bank debt

€ 4,756

▼ 64% vs 2024

Loans from banks and other lenders, long and short.

Owed to suppliers

€ 10,742

▲ 24% vs 2024

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

Taxes and wages

€ 22,831

▲ 28% 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 € 26,252 € 76,250 € 62,128 € 90,695 ▲ 46%
Profit after taxes € -22,434 € 22,361 € 2,024 € 18,561 ▲ € 16,537
Equity € -21,929 € 433 € 2,456 € 21,017 ▲ € 18,561
Total debts € 74,879 € 47,129 € 40,932 € 82,271 ▲ 101%
Cash € 27,068 € 2,048 € 21,272 € 52,583 ▲ 147%
Retained profit € -28,929 € -9,667 € -7,644 € 10,917 ▲ € 18,561
Bank debt € 0 € 17,949 € 13,091 € 4,756 ▼ 64%
Balance sheet total € 52,950 € 47,562 € 43,389 € 103,288 ▲ 138%

Key figures of THESYS, 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 THESYS?

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

  • New annual accounts for financial year 2025: profit of € 18,561 (▲ € 16,537 vs 2024). Source: NBB ↗
  • New establishment in Ukkel. KBO
  • Start of the company according to the CBE. KBO

In short

From € 22,434 loss in 2022 to € 18,561 profit in 2025.

Paid € 3,964 in corporate taxes since 2022.

Best year ever: 2023, with € 22,361 profit.

Management

Marc Kestemont
THESYS

Behind THESYS is Marc Kestemont.

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Directors

According to the 2025 annual accounts

Marc Kestemont

Director

Establishments

Establishment units

Physical locations of this company

Registered office

Vergeet-mij-nietjesstraat 52

1180 Ukkel

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

Details

Company number
0866.425.378
VAT number
BE 0866.425.378
Registered office
Vergeet-mij-nietjesstraat 52, 1180 Ukkel
Names & denominations
THESYS
Enterprise type
Rechtspersoon
Legal form
Private limited company
Legal situation
Normale toestand
Start date
19 July 2004
Peppol
Active · Active since 16 Dec 2025
Activities · NACE

Activiteiten op het gebied van computerconsultancy en beheer van computerfaciliteiten

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Frequently asked questions

What does THESYS do?
THESYS is an IT company in Ukkel. Private Limited, started on 19 July 2004, 1 establishment.
What is the address of THESYS?
The registered office of THESYS is located at Vergeet-mij-nietjesstraat 52, 1180 Ukkel.
Is THESYS still active?
Yes. According to the CBE (2 October 2026) THESYS is active, legal situation “Normale toestand”, started on 19 July 2004.
Is THESYS registered on Peppol?
Yes, THESYS is registered on the Peppol network with ID 0208:0866425378.
What is the enterprise number of THESYS?
The enterprise number of THESYS is BE0866425378.
When was THESYS founded?
THESYS was founded on 19 July 2004.