Diamack Oy is a limited company based in Kotka, registered in 2006. Its taxable income in 2024 was 56 t€ and its income taxes 11 t€. Public buyers bought 13 t€ from it in 2022–2026; the largest buyer is Geologian tutkimuskeskus (Työ- ja elinkeinoministeriön hallinnonala).
Taxes
Measured by taxable income, Diamack Oy is in the upper half of the industry class other specialised retail sale of hardware, building materials and glass (211 companies with taxable income; median 38 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.
Sales to public buyers
Largest buyers
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