ZoomInfo Duo Become Billionaires With Stock Doubling Since IPO

Henry Schuck was 23 years old when he and college classmate Kirk Brown put $25,000 on their credit cards to start a company selling business-intelligence data. Schuck was in law school, and Brown had recently finished a stint as a caddy on the PGA Tour.

Today they’re both billionaires. Shares of their firm, ZoomInfo Technologies Inc., surged 15% to $44.76 at 1:10 p.m. in New York, boosting its market value to $17.1 billion, more than doubling since last week’s initial public offering.

ZoomInfo Shares Close 62% Higher After $935 Million U.S. Debut

“We’re building a company for the long term,” ...