I thought he shut down his 'The Eric Trump Foundation', but I now looked it up and he just re-branded it as 'Curetivity'.
(Eric) Trump is a trustee and executive vice president of his father's business, The Trump Organization, running it alongside his older brother Donald Jr.
https://en.wikipedia.org/wiki/Eric_Trump
He did say organization, so it is likely he is talking about Trump Organization in this case. It is a family business so it makes sense he would say "mine". But you make a valid point, we can only guess which one he is really talking about.