The University of Santo Tomas is one of the oldest chapters of the Fraternity and the very first Catholic university to embrace the Tenets and Codes of Conduct of the Triskelions’ Grand Fraternity, Tau Gamma Phi. The Chapter was the 6th to be established from the time the University of the Philippines was first conceived on October 4, 1968.
From the time the Metro Manila Regional Council (MMRC) was formed, UST Chapter has produced five (5) Secretary Generals namely Bro. Joel Rillo+, Bro. Jay de Castro, Bro. Mike Molino, Bro. Ferdie Tobias+ and Bro. Marty Asturias; and three Lady Secretary Generals, Sis. Liza Anza Sis. Ros Salonga and Sis. Celine Cardenas.
Since the formation of the National Council, the Chapter also has produced two (2) National Premier namely Bro. Mike Molino and Bro. Guy Lopez.
Although the Chapter has never been accorded recognition by the University, this did not deter the Thomasian Triskelions from reaching out to its fellow Thomasians and the community through its outreach projects. The Tau Gamma Phi and Tau Gamma Sigma remain the most dominant fraternity and sorority in UST. It boasts of more than 1,000 alumni to date who are excelling in the fields of politics, government service, medical and paramedical, legal, media, arts and entertainment, business and the private sector, as well as in civil society organizations.
In June 2002 Triskelion Alumni of UST was officially recognized and Bro. Ferdinand Tobias+, MDG was the first Interim President.