Clark has developed a number of expensive hobbies in the 20 years since Netscape's IPO. As a former Navy man, sailing is perhaps his number one passion. His latest watercraft is the new 100-foot ...

Those properties include an upstate New York estate that used to belong to Ron Howard, a mansion on the Upper East Side, and a $45 million estate in Southampton.

Alistair Barr of Business Insider writes about his former Bloomberg News reporter Jack Clark, who ignored his advice to remain a reporter and left journalism in 2015 and is now estimated to be a ...