Oseir Oy

OYActive

Y-tunnus 1543375-7Hermiankatu 12D, 33720 TampereManufacture of instruments and appliances for measuring, testing and navigation· NACE 2651Est. 1999 · 26 years old5 employeeswww.oseir.com

Overview Financials People & ownership Related companies

Oseir Oy is a Finnish OY based in Tampere, operating in the Manufacture of instruments and appliances for measuring, testing and navigation sector. Incorporated in 1999, the company has 5 employees and reported revenue of EUR 1,2M in its latest annual filing.

Revenue 2025

EUR 1,2M

+16% vs 2024

EBITDA margin

9.1%

+278% vs 2024

Net profit 2025

EUR 67K

+729% vs 2024

Key ratios

See full ratios →

48.0%

This company

20212025

2.5×

This company

20212025

9.6%

This company

20212025

EBITDA — year on year

EUR millions

Key figures

Annual report 2025

Revenue	EUR 1,2M	+16%
EBITDA	EUR 106K	+278%
Net profit	EUR 67K	+729%
Total assets	EUR 691K	-5%
Equity	EUR 332K	-11%
Employees	5	—

Company information

Legal name

Oseir Oy

Y-tunnus number

1543375-7

Legal form

Osakeyhtiö

NACE code

2651 · Manufacture of instruments and appliances for measuring, testing and navigation

Founded

16 July 1999 · 26 years

Share capital

EUR 17 942

Employees

5 (FTE)

VAT registered

Audit selected

Last report

2025-12-31

Financial year

January – December

Signatory rights

Hallituksen puheenjohtaja ja toimitusjohtaja kumpikin yksin

Company purpose

Yhtiön toimiala on optisten ja elektronisten mittaus-, tarkkailu-, ohjaus-, prosessi- ja prosessointilaitteiden sekä näihin liittyvien menetelmien, laitteiden ja niiden osien, toimintaperiaatteiden, palvelujen, ohjelmistojen, tietokantojen, käyttöliittymien, komponenttien ja materiaalien (lukuunottamatta puolijohdekomponentteja) tutkimus, kehitys, valmistus, huolto, kauppa, vuokraus, lisensiointi sekä immateriaalioikeuksien, kaupankäyntioikeuksien, osakkeiden ja osuuksien kauppa ja lisensiointi sekä koulutus ja konsultointi sekä kiinteistökauppa. Yhtiö toimii kaikkialla maailmassa.

Contact

Address

Hermiankatu 12D, 33720 Tampere

Phone

+3580407736311

info@oseir.com

Website

www.oseir.com

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Frequently asked questions

What is the Y-tunnus number of Oseir Oy?

Oseir Oy is registered with PRH / YTJ under Y-tunnus 1543375-7.

What is the revenue of Oseir Oy?

Oseir Oy reported revenue of EUR 1,2M in 2025.

How many employees does Oseir Oy have?

Oseir Oy employs 5 people as of the latest annual report.

Who is the CEO of Oseir Oy?

Tatu-Jan Sebastian Leppänen is the CEO of Oseir Oy, in role since 2023.

Who is the chairman of Oseir Oy?

Jussi Pekka Larjo chairs the board of Oseir Oy, in role since 2025.

Where is Oseir Oy headquartered?

Oseir Oy's registered address is Hermiankatu 12-D.

Oseir Oy

Key ratios

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on Oseir Oy

Key ratios

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on Oseir Oy