Residential construction firm · PORNAINEN · FI · Founded 2007 · Accounts through 2025 · Updated Jul 26, 2026
Public range today€700k - €1.2m
See what is holding the value back today, what this company could be worth in five years and which actions make the difference. The estimate is based on filed annual accounts.
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Historical indicative ranges based on public filings. This is not an asking price or confirmation that the company is for sale.
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Claim this companyOperating as a residential construction firm, Kai Siren Oy is registered in PORNAINEN, Finland. The company was founded in 2007, incorporated as a Limited company.
Kai Siren Oy is listed in Finnish Patent and Registration Office (PRH) under registry number 20837211. This profile consolidates official annual accounts into one indexable company dossier.
Companies in this NACE 41.20 band file annual accounts with PRH.
Across the 2024-2025 window revenue has more than doubled, moving from €496,682 to €745,309. EBITDA for 2025 comes in at €157,570.
A public indicative value curve is available for Kai Siren Oy, based on filed company accounts. A free account unlocks the five-year outlook and concrete actions to increase value.
The most recent annual filing covers 2025 (period end 2025-12-31).
This page is refreshed whenever new regulator-filed data for Kai Siren Oy becomes available, consolidated into a single audit-grade view.
Public regulator-filed figures across 2 years.
Fiscal year | Revenue | EBITDA | Total assets | Equity | Filing |
|---|---|---|---|---|---|
| 202531 Dec 2025 | €745,309 | €157,570 | €535,860 | €414,789 | - |
| 202431 Dec 2024 | €496,682 | €98,922 | €390,858 | €342,142 | - |
Kai Siren Oy was founded in 2007 and is registered with Finnish Patent and Registration Office (PRH), incorporated as a Limited company.
Kai Siren Oy is registered under NACE 41.20. That places the business within the Finnish cluster for this activity.
According to the company registry, Kai Siren Oy is based in PORNAINEN, FI.
The most recently filed annual accounts cover fiscal year 2025 (period end 2025-12-31), publicly available via Finnish Patent and Registration Office (PRH).
This page shows a rounded, automated indicative range generated by Upswitch from official registry facts, public company-size information, filed accounts where available, and governed sector benchmarks. The evidence basis is labelled beside the graph. It is not a certified or statutory valuation, sale price, offer, recommendation, or financial, investment, tax or legal advice. Figures for Kai Siren Oy may be incomplete or inaccurate and must not be relied upon for any transaction; a precise valuation needs owner- or advisor-supplied data.
Company identity and public facts are reused from the official or licensed source named on this page, with its filing or update date. Upswitch estimates remain distinct from source facts and do not imply endorsement by the registry. Natural-person enterprises are excluded from public valuation pages, and public registry personal data is not used for direct marketing.
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Indicative public valuation range based on financial year 2025. This historical record does not yet contain an immutable calculation snapshot, so no sector range is reconstructed after the fact. Not a transaction value, asking price or fairness opinion.
