Alpha Tau Omega (ΑΤΩ) is an American social fraternity founded at the Virginia Military Institute in 1865. The fraternity has around 250 active and inactive chapters and colonies in the United States and has initiated more than 200,000 members. Alpha Tau Omega represents one-third of the Lexington Triad, along with Kappa Alpha Order and Sigma Nu. The Fraternity does not have chapters or affiliations outside the United States. The fraternity’s non-profit organization is The ATO Foundation, which provides scholarships to members.