Kai Siren Oy

OYActive

Y-tunnus 2083721-1Monninkyläntie 33, 07170 PornainenConstruction of residential and non-residential buildings · NACE 4100Est. 2006— employees

Overview Financials People & ownership Related companies

Kai Siren Oy is a Finnish OY based in Pornainen, operating in the Construction of residential and non-residential buildings sector. Incorporated in 2006, the company reported revenue of EUR 745K in its latest annual filing.

Revenue 2025

EUR 745K

+50% vs 2024

EBITDA margin

21.1%

-82% vs 2024

Equity ratio

77.4%

Financial strength

Net profit 2025

EUR 100K

+74% vs 2024

Key ratios

See full ratios →

77.4%

18.7%

24.1%

EBITDA — year on year

EUR millions

Key figures

Annual report 2025

Revenue	EUR 745K	+50%
EBITDA	EUR 158K	-82%
Net profit	EUR 100K	+74%
Total assets	EUR 536K	+37%
Equity	EUR 415K	+21%
Employees	—	—

Contact

Address

Monninkyläntie 33, 07170 Pornainen

Phone

+3580400838637

kai.siren@pp1.inet.fi

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Frequently asked questions

What is the Y-tunnus number of Kai Siren Oy?

Kai Siren Oy is registered with PRH / YTJ under Y-tunnus 2083721-1.

What is the revenue of Kai Siren Oy?

Kai Siren Oy reported revenue of EUR 745K in 2025.

Who is the CEO of Kai Siren Oy?

Pentti Kaarlo Komonen is Audit of Kai Siren Oy, in role since 2007.

Where is Kai Siren Oy headquartered?

Kai Siren Oy's registered address is Monninkyläntie 33.

Kai Siren Oy

Key ratios

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on Kai Siren Oy

Key ratios

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on Kai Siren Oy