Management system certificate issued to Oy Holmen & Co, certifying conformity to ISO 9001:2015 for design, sourcing, manufacturing, processing, and pre-assembly of light metal components, dated April 29, 2025, issued by DNV Business Assurance in Espoo, Finland.
Certificate from DNV listing locations in Finland for Oy Holmlän & Co, with site names, addresses, and site scope information.

Management system certificate issued to Oy Hollmén & Co, located in Ulvila, Finland, valid from June 1, 2023, to May 31, 2026, certifying compliance with ISO 14001:2015 for sourcing, manufacturing, processing, and pre-assembly of light metal components.
A certificate from DNV, Cert No. 96150-201-AE-11-FIN-FINAS, dated February 20, 2023, for Oy Holmlén & Co, with details of site names, addresses, and project scopes in Finland, with a faint DNV logo in the background.

A certificate from Kiwa Sweden AB certifying Oy Hollmén & Co Ulvila for welding railway vehicles and components according to SS-EN 15085-2:2020, issued on April 12th, 2023, valid until April 12th, 2026.