Serious Sirius Oy

OYActive

Y-tunnus 3265556-2C/O Petja Mustonen Ullanmäentie 10C-10131, 02750 EspooActivities of advertising agencies · NACE 7311Est. 2022— employees

Overview Financials People & ownership Related companies

Serious Sirius Oy is a Finnish OY based in Espoo, operating in the Other activities of advertising agencies sector. Incorporated in 2022, the company reported revenue of EUR 44K in its latest annual filing.

Revenue 2025

EUR 44K

+55% vs 2024

EBITDA margin

1.8%

-95% vs 2024

Equity ratio

66.5%

Financial strength

Net profit 2025

EUR 189

-98% vs 2024

EBITDA — year on year

EUR millions

Key figures

Annual report 2025

Revenue	EUR 44K	+55%
EBITDA	EUR 784	-95%
Net profit	EUR 189	-98%
Total assets	EUR 19K	-9%
Equity	EUR 13K	+2%
Employees	—	—

Contact

Address

C/O Petja Mustonen Ullanmäentie 10C-10131, 02750 Espoo

Phone

+3580505452084

mustonenpetja@gmail.com

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Frequently asked questions

What is the Y-tunnus number of Serious Sirius Oy?

Serious Sirius Oy is registered with PRH / YTJ under Y-tunnus 3265556-2.

What is the revenue of Serious Sirius Oy?

Serious Sirius Oy reported revenue of EUR 44K in 2025.

Who is the CEO of Serious Sirius Oy?

Kirsti Kaarina Komppula is Deputy Member of Serious Sirius Oy, in role since 2022.

Who is the chairman of Serious Sirius Oy?

Petja Tapani Mustonen chairs the board of Serious Sirius Oy, in role since 2022.

Where is Serious Sirius Oy headquartered?

Serious Sirius Oy's registered address is C/O Petja Mustonen Ullanmäentie 10-C131.

Serious Sirius Oy

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on Serious Sirius Oy

EBITDA — year on year

Key figures

Company information

Contact

Frequently asked questions

More on Serious Sirius Oy