I knew about the Carnegie Mellon donation, I think he went to business school there. Also knew about his Corzine purchase, actually demolished the house and built a completely new one. I think he just recently completed the renovation.
Thing is to get donations like these the person doesn't necessarily have to have attended the school. Alums are the most logical source for donations but they don't necessarily have to be the only ones. I think there was an article awhile back and about 40 some odd percent of donations to RU were actually from non alums. Local residents/businesses are just as good sources, you just have to find places where interests may align.
I've mentioned here before that Louisville got a 5M dollar donation for their soccer stadium from a guy that was an alum of Murray State and wasn't even a fan of soccer at first. There are always opportunities to cross promote once you get them into the fold for whatever they may be interested in to start. It's one of the reasons I've said there's a practicality to supporting Olympic sports like lacrosse, soccer, golf, etc..Participants of these sports usually come from more affluent backgrounds and are more likely to go on and do well in life. If you neglect their passions why would they be interested in giving a second look to donate to other causes and then you've lost a nice pool of potential donors.