SIY Sisäilmatieto Oy

OYActive

Y-tunnus 1465282-7Kivenlahdenkatu 1B-143, 02320 EspooBusiness and other management consultancy activities · NACE 7020Est. 1998— employees

Overview Financials People & ownership Related companies

SIY Sisäilmatieto Oy is a Finnish OY based in Espoo, operating in the Business and other management consultancy activities sector. Incorporated in 1998, the company reported revenue of EUR 293K in its latest annual filing.

Revenue 2025

EUR 293K

-10% vs 2024

EBITDA margin

0.8%

-94% vs 2024

Equity ratio

77.7%

Financial strength

Net profit 2025

EUR 2K

-94% vs 2024

EBITDA — year on year

EUR millions

Key figures

Annual report 2025

Revenue	EUR 293K	-10%
EBITDA	EUR 2K	-94%
Net profit	EUR 2K	-94%
Total assets	EUR 636K	+18%
Equity	EUR 494K	+0%
Employees	—	—

Contact

Address

Kivenlahdenkatu 1B-143, 02320 Espoo

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Frequently asked questions

What is the Y-tunnus number of SIY Sisäilmatieto Oy?

SIY Sisäilmatieto Oy is registered with PRH / YTJ under Y-tunnus 1465282-7.

What is the revenue of SIY Sisäilmatieto Oy?

SIY Sisäilmatieto Oy reported revenue of EUR 293K in 2025.

Who is the CEO of SIY Sisäilmatieto Oy?

Mervi Birgitta Ahola is Chief Executive Officer of SIY Sisäilmatieto Oy, in role since 2018.

Who is the chairman of SIY Sisäilmatieto Oy?

Risto Sakari Kosonen chairs the board of SIY Sisäilmatieto Oy, in role since 2018.

Where is SIY Sisäilmatieto Oy headquartered?

SIY Sisäilmatieto Oy's registered address is Kivenlahdenkatu 1-B43.

SIY Sisäilmatieto Oy

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on SIY Sisäilmatieto Oy

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on SIY Sisäilmatieto Oy