Helberg, 35, who was senior adviser to Palantir Chief Executive Officer Alex Karp, is married to Keith Rabois, a managing director at Khosla Ventures. Rabois, 56, is a longtime business associate of ...

Palantir (PLTR) stock fell 12% Tuesday as investors scrutinized the company's valuation and declining sales in its international business, even as its first quarter revenue blew past Wall Street's ...