[2][3] St. Elmo's is a member of the “ancient eight consortium” which includes the seven other original societies at Yale: Skull and Bones, Scroll and Key, Berzelius, Wolf's Head, Book and Snake, Elihu, and Mace and Chain.

[5][2] St. Elmo was the third senior society at the Sheffield Scientific School, Yale's sciences and engineering college from 1854 to 1956.

[1] In June 1905, the group was incorporated under Connecticut state law to form the St. Elmo Corporation, with the primary purpose of holding the title to a new clubhouse at 111 Grove Street and other financial assets.

[1] On October 11, 1925, the chapter severed its ties with Delta Phi and became an independent organization called the St. Elmo Society.

[2] The Harvard Crimson reported that the split came "after the mother chapter deplored its snobbishness and disrespect of frat pins.

"[7] The creation of Yale's residential system in 1933 led some Sheffield organizations to sell their buildings to the university, but St. Elmo retained its residence.

[8] Also called St. Elmo Hall, it was designed by architect Kenneth MacKenzie Murchison in an Elizabethan style.

In 1985, the university refused to renew St. Elmo's lease at 109 Grove Street, giving the society short notice to move out and find a new residence.

[20] In her young adult novel, Ninth House, Leigh Bardugo features an occult version of the St. Elmo Society whose members can conjure storms.