Company: eBay
Year Founded: 1995
How their partnership was formed: Skoll and Omidyar were casual acquaintances when Omidyar built the code for eBay.
Skoll, a recent Stanford MBA graduate, initially scoffed at the auction website. "First he told me it was a stupid idea," Omidyar wrote for Time International, " and then he agreed to come on board."
Skoll was the first employee on the payroll and was hired to write Omidyar's business plan. As eBay began to take off, so did their business relationship. The pair led the auction site to an IPO just 3 years later.
Why their partnership works: Skoll and Omidyar share democratic values which has strengthened their business and their partnership. According to the LA Times, "They didn't talk about customers; they talked about 'the community.'"
The two were also charitable. "Shutting the community out of EBay's upcoming IPO—a practical necessity—seemed ungrateful," the LA Times reports. "So they decided that EBay would endow a charitable foundation with pre-IPO stock and share its wealth that way."
Loyalty to customers and giving back to the community are values that have made the pair billionaires.
*Although they were business partners, eBay was solely founded by Pierre Omidyar. As Pierre's first employee, Skoll worked very closely with him and partnered on many aspects of the business, but he was not a co-founder.
Sources: Los Angeles Times, Notable Biographies, Omidyar Network