Active · per the CBE, 1 October 2026

SIENA

BE0880958750

Rechtspersoon Private limited company 1 establishment

SIENA is registered with the CBE as active in: Activiteiten van adviesbureaus op het gebied van bedrijfsvoering en overig managementadvies. Private Limited, started on 10 April 2006, 1 establishment.

Willem Elsschotlaan(Kok) 1 box 105, 8670 Koksijde

Behind the company: Nathalie Hillaert, Werner Nies.

Active for

20 year, 5 months

Warning lights

Signals from the annual accounts, the CBE and the Official Gazette, each with its threshold and source. No score, no verdict.

  • Tight liquidity NBB

    Cash and receivables cover 13 % of short-term debt in 2025; threshold 65 %.

  • Figures corrected NBB

    Corrected annual account filed for 2022.

Financials

Financial year 2025

SIENA from Koksijde, company number BE0880958750, closed financial year 2025 with a result of € 12,433 after tax. For that financial year SIENA recorded a gross margin of € 153,408 and equity of € 503,239. Compared with financial year 2024, the result moved from € -32,129 to € 12,433. Profitable, and profit is growing. The buffer is growing. A strong own buffer against the debts. The most recent annual accounts were filed with the National Bank of Belgium on March 31, 2026.

What it is worth Growing

€ 503,239

▲ 3% vs 2024

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

Profit Growing

€ 12,433

▲ still € 32,129 loss in 2024

Profit after tax over the fiscal year.

Cash in the bank

€ 4,080

▲ 79% 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 € 484,639.

People and assets in 2025

Full-time equivalents

0

Average over the fiscal year, from the social balance sheet.

Vehicles and equipment

€ 8,425

▼ 17% vs 2024

Book value of vehicles, furniture and equipment.

Debts at end 2025

Bank debt ≈ 13 years to go

€ 207,454

▼ 73% vs 2024

€ 13,000 is repaid this year. At this pace the long-term loan is gone in ≈ 13 years.

Owed to suppliers

€ 30,600

▲ 65% vs 2024

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

Taxes

€ 23,224

▲ € 21,234 vs 2024

Corporate tax and VAT still to pay. No wage debt: nothing outstanding to staff or social security.

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Key figures per fiscal year Download key figures (CSV)
2022202320242025Change 2024 → 2025
Gross margin € 47,830 € 44,027 € 53,424 € 153,408 ▲ 187%
Profit after taxes € 1,784 € 50,847 € -32,129 € 12,433 ▲ € 44,563
Equity € 472,088 € 522,935 € 490,806 € 503,239 ▲ 3%
Total debts € 755,151 € 828,248 € 817,190 € 300,471 ▼ 63%
Cash € 6,831 € 6,911 € 2,279 € 4,080 ▲ 79%
Land & buildings € 1,205,505 € 1,299,527 € 1,297,761 € 756,752 ▼ 42%
Retained profit € 453,488 € 504,335 € 472,206 € 484,639 ▲ 3%
Bank debt € 213,311 € 787,973 € 775,197 € 207,454 ▼ 73%
Balance sheet total € 1,273,889 € 1,396,310 € 1,351,599 € 811,893 ▼ 40%

Key figures of SIENA, fiscal years 2022 to 2025, from the annual accounts filed with the National Bank of Belgium.Next annual account (fiscal year 2026) expected before 30 April 2027.

What happened to SIENA?

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

  • New annual accounts for financial year 2025: profit of € 12,433. Source: NBB ↗
  • Nathalie Hillaert became a director. NBB
  • New establishment in Koksijde. KBO
  • Werner Nies became a director. NBB
  • Start of the company according to the CBE. KBO

In short

From € 1,784 profit in 2022 to € 12,433 profit in 2025.

Paid € 99,883 in corporate taxes since 2022.

Best year ever: 2023, with € 50,847 profit.

Management

Nathalie Hillaert
Werner Nies
SIENA

Behind SIENA are Nathalie Hillaert and Werner Nies. It owns 20% of Aandelen Loods 13 NV itself.

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Directors

According to the 2025 annual accounts

Nathalie Hillaert

Director

Also active at: ESTORNUDO

since 2007

since 2006

Establishments

Establishment units

Physical locations of this company

Registered office

Willem Elsschotlaan(Kok) 1 box 105

8670 Koksijde

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 →

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

Details

Company number
0880.958.750
VAT number
BE 0880.958.750
Registered office
Willem Elsschotlaan(Kok) 1 bus 105, 8670 Koksijde
Names & denominations
SIENA
Enterprise type
Rechtspersoon
Legal form
Private limited company
Legal situation
Normale toestand
Start date
10 April 2006
Peppol
Active · Active since 30 Oct 2025
Activities · NACE

Activiteiten van adviesbureaus op het gebied van bedrijfsvoering en overig managementadvies

Overige adviesbureaus op het gebied van bedrijfsvoering en beheer

Overige adviesbureaus op het gebied van bedrijfsbeheer; adviesbureaus op het gebied van bedrijfsvoering

Verhuur en exploitatie van eigen of geleased niet-residentieel onroerend goed, exclusief terreinen

Frequently asked questions

What does SIENA do?
SIENA is registered with the CBE as active in: Activiteiten van adviesbureaus op het gebied van bedrijfsvoering en overig managementadvies. Private Limited, started on 10 April 2006, 1 establishment.
What is the address of SIENA?
The registered office of SIENA is located at Willem Elsschotlaan(Kok) 1 box 105, 8670 Koksijde.
Is SIENA still active?
Yes. According to the CBE (1 October 2026) SIENA is active, legal situation “Normale toestand”, started on 10 April 2006.
Is SIENA registered on Peppol?
Yes, SIENA is registered on the Peppol network with ID 0208:0880958750.
What is the enterprise number of SIENA?
The enterprise number of SIENA is BE0880958750.
When was SIENA founded?
SIENA was founded on 10 April 2006.