[1] Members include professional and amateur performers, teachers, students, manufacturers, publishers, and others interested in the trumpet.

In 1975, the first ITG Conference was held in Bloomington, Indiana; the following year the Guild met as part of the First International Brass Congress in Montreux, Switzerland.

[2] In 1982, the ITG Archive was established at Western Michigan University to chronicle the Guild's activities and to preserve historical trumpet-related research.

In fall, 1990 the Euro-ITG chapter was formed at the Trumpet Days in Bad Sackingen, Germany, with initial membership of 120 members.

The Journal features columns dealing with aspects of trumpet performance and reviews of books, music, and CDs.