I wondered what the other biggest gifts were, but could not find a canonical list. A good starter is the following:

http://web.mit.edu/newsoffice/nr/2000/neurogifts.html

I guess that its top 3 still hold. In addition, I found the following:

- $1b endowment to found Vedanta University from Anil Agarwal Foundation (2006)

- $454.5m to National Taiwan University from Terry Gou (2007)

- $400m to Columbia from John Kluge (4th largest in 2007)

- $360m to RPI from an anonymous donor (page mentions largest in US history in 2001)

I could not easily find the official list all of these pages refer to, anybody has an idea?