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Mainstay Holding is a company that has seven sub-companies under it. Focusing on Development, Construction, Properties, Food & Beverage, and Advertising. Mainstay Headquarters located in Presint 15, Putrajaya. Sub-companies include:Mainstay Development Sdn Bhd, Mainstay Properties Sdn Bhd, Mainstay Food & Beverage Sdn Bhd, Mainstay Ad Sdn Bhd, Spaceu8 Property Management Sdn Bhd, Pembinaan Tetap teguh Sdn Bhd.