Palantir Technologies (PLTR) shares have traded amid heightened volatility in late May 2026, closing at $143.34 on May 28 after an 8.17% single-day surge tied to Dell’s earnings beat that reinforced investor confidence in the company’s AI platform partnerships. The stock remains down roughly 23% year-to-date despite robust Q1 2026 results delivered May 4, which showed 85% year-over-year revenue growth to $1.63 billion and a raised full-year guidance of 71% revenue expansion, including 120% U.S. commercial growth. Broader software-sector rotation and AI-trade sentiment continue to influence price action, with no major company-specific catalysts scheduled before the week’s close. Trader focus centers on sustained momentum in defense and enterprise AI adoption versus valuation concerns after prior gains.