Henry Tan Chi Sieng Sy Sr. (/siː/; Chinese: 施至成; Pe̍h-ōe-jī: Si Chì-sêng; pinyin: Shī Zhìchéng; Zhuyin Fuhao: ㄕ ㄓˋ ㄔㄥˊ;[3] October 15, 1924 – January 19, 2019) was a Filipino businessman.

[4] His family would later return to China, with Henry staying behind to establish ShoeMart, a small Manila shoe store, in 1958.

[8][6] At age 12, he and his family moved to the Philippines during the Commonwealth Era under American colonial period, where his father set up a shop that sold various household items.

[6] His family decided to return to China,[6] but Sy stayed in the Philippines, where he completed his secondary education at an institution now known as the Chiang Kai Shek College[9] in Tondo, Manila and earned his Associate of Arts degree in commercial studies at Far Eastern University in 1950.

[18] He established business presence in Mainland China when the SM Group opened its first shopping mall in his native Xiamen.

[3] In August 2005, Sy's stake in the San Miguel Corporation, Southeast Asia's largest food and beverage conglomerate, reached 11%.

In 2006, Sy bought the remaining 66% of Equitable PCI Bank, the Philippines' third largest lender, and merged it into BDO the following year.

The huge gain was due to his holding company, SM Investments, which possessed interests in BDO, inter alia.

[18] For 11 straight years until his death in 2019, Forbes ranked him as the richest person in the Philippines, with an estimated net worth of US$19 billion in 2019.