In 1966, the SEC at the time formed Kappa Sigma Inc, claimed it to be in charge of the estate, and began to solicit for donations from brothers. In 1967, Kappa Sigma Inc changed its name to the Kappa Sigma Memorial Fund and filed to be a foundation for tax purposes. This made two foundations for the Kappa Sigma Fraternity (the other being The Kappa Sigma Endowment Fund)
So everyone is somewhat correct.
(SEC - Supreme Executive Committee)
ETA:
http://en.wikipedia.org/wiki/Kappa_Sigma