One of Hong Kong’s richest families plans to give money to the University of Southern California on the heels of presenting Harvard University with the largest donation in its four-century history.

Ronnie and Gerald Chan, whose family controls the Hang Lung property group, last week revealed they had pledged $350m to Harvard’s School of Public Health, from which Gerald graduated. A spokesperson for Hang Lung said they planned to make a donation to USC where Ronnie completed an MBA.

Forbes estimates that the brothers, whose father founded Hang Lung, are worth a collective $3bn, placing them 17th on the Hong Kong rich list. The spokesperson said they had not yet made their gift, but the South China Morning Post reported that Ronnie had flown to Los Angeles to make the pledge.