High Quality Content by WIKIPEDIA articles! SM Megamall is a huge shopping mall located in the Ortigas business district of Metro Manila, Philippines. It is one of the largest SM Supermall developed and operated by SM Prime Holdings, the largest mall operator in the Philippines owned by Henry Sy Sr.The mall has two buildings interconnected with a bridge. The mall occupies a land area of approximately 21 hectares and has a total floor area of an estimated 392,000 m2 (4,220,000 sq ft), making it the second largest shopping mall in the country surpassing SM Mall of Asia by 2,000 m2 (22,000 sq ft) The mall has a maximum capacity of 4 million people.It is as large as the Changi Airport Terminal 2 in Singapore.