Castellum Helsinki Hämeentie 15 Oy is a limited company based in Helsinki, registered in 2015. Its taxable income in 2024 was 46 € and its income taxes 9 €. Public buyers bought 6 982 € from it in 2023–2024; the largest buyer is Verohallinto (Valtiovarainministeriön hallinnonala).
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Taxes
Measured by taxable income, Castellum Helsinki Hämeentie 15 Oy is in the lower half of the industry class rental and operating of own or leased non-residential real estate (6954 companies with taxable income; median 22 t€).
Taxable income is the profit as calculated for taxation, not revenue. Public data from the Finnish Tax Administration; figures for 2025 are published in November 2026. Revenue, financial ratios and employee numbers are shown once the company has filed its financial statements digitally.