Why Is Palantir (PLTR) Stock Down Today? Insider Selling and Valuation Fears Spark 3.4% Slide

Palantir Technologies Inc (PLTR) closed the session on March 10, 2026, at $151.14, down 3.38% for the day. The decline continued a volatile trend for the software giant, which has seen its stock retreat approximately 7% since the start of the year. Despite a backdrop of robust financial results and new commercial partnerships, the stock underperformed the broader Software & IT Services sector, which fell a modest 0.19%.