Helco er bl.a. leverandør til følgende virksomheder:

• A.P.Møller-Mærsk gruppen.
• Lauritzen Kosan as
• Søby Værft as
• Kilian-Schilder
• Danfoss
• Semco as
• Kone Elevator as
• Thyssen Elevator as
• Fåborg Værft as
• Pro-Automatik as
• Kemp & Lauritzen as
• Aluflame as
• Scankab as
• Novenco as
• Atek Teknik as
• m.fl.