JonSak Oy

OYDissolved

Y-tunnus 2408424-5Tuuralammintie 3, 42100 JämsäConstruction of residential and non-residential buildings · NACE 4100Est. 20110 employees

Overview Financials People & ownership Related companies

JonSak Oy is a Finnish OY based in Jämsä, operating in the Construction of residential and non-residential buildings sector. Incorporated in 2011, the company has 0 employees and reported revenue of EUR 0 in its latest annual filing.

Revenue 2025

EUR 0

EBITDA margin

—

-37% vs 2024

Equity ratio

100.0%

Financial strength

Net profit 2025

EUR -395

+47% vs 2024

EBITDA — year on year

EUR millions

Key figures

Annual report 2025

Revenue	EUR 0	—
EBITDA	EUR -395	-37%
Net profit	EUR -395	+47%
Total assets	EUR 187	-68%
Equity	EUR 187	-98%
Employees	0	—

Contact

Address

Tuuralammintie 3, 42100 Jämsä

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Frequently asked questions

What is the Y-tunnus number of JonSak Oy?

JonSak Oy is registered with PRH / YTJ under Y-tunnus 2408424-5.

Who is the CEO of JonSak Oy?

Jouni Keijo Ensio Auvinen is Chief Executive Officer of JonSak Oy, in role since 2011.

Who is the chairman of JonSak Oy?

Päivi Heli Anitta Jalovaara chairs the board of JonSak Oy, in role since 2011.

Where is JonSak Oy headquartered?

JonSak Oy's registered address is Tuuralammintie 3.

JonSak Oy

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on JonSak Oy

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on JonSak Oy