Palantir Technologies shares rose Monday after the artificial-intelligence software company posted strong sales for the last quarter, buoying investor confidence in the company's growth amid voracious appetite for AI products. Palantir reported revenue of $726 million for the quarter through September, a 30% increase over the same period a year ago and beating analysts' expectations. Analysts say growth in Palantir's commercial business and government contracts are critical to justify its lofty--and rising--stock price.