He is the president and chief executive officer (CEO) of Top Frontier Investment Holdings, Inc., the largest shareholder of San Miguel Corporation (SMC).

As working student, he holds a Bachelor of Science degree in mechanical engineering from Far Eastern University.

[4][5] Ang was elected vice-chairman of SMC in January 1999; and later as president and chief operating officer (COO) in March 2002.

In June 2012, he gained control of SMC after acquiring the shares owned by Eduardo Cojuangco, Jr., a fellow Filipino businessman and politician.

[6][7][8][9] On April 15, 2021, ten months following the death of Cojuangco, SMC amended its by-laws to unify the role, functions and duties of chief executive officer (CEO) to that of the president.