A Malaysian property developer founded six decades ago as a plastics trader is repositioning itself for the artificial intelligence era, leveraging land banks in the Klang Valley and Johor to court data center operators. Mah Sing, No. 422 on Fortune’s Southeast Asia 500 list, had a blockbuster 2025, reporting decade-high real estate sales of 2.51 billion ringgit ($633 million); the conglomerate also lifted its 2026 revenue guidance to 2.76 billi…