On October 17, 2025, Palantir Technologies Inc. (PLTR) shares traded lower at $175.27 (-1.60%) amid broader market weakness and notable company-specific developments. The most significant news is that billionaire investor Paul Tudor Jones' hedge fund, Tudor Investment Corporation, fully exited its Palantir position in the second quarter, citing concerns over the stock's high valuation and shifting capital toward emerging quantum computing opportunities. This move, widely followed by institutional and retail investors, has heightened scrutiny of Palantir's premium multiples and contributed to selling pressure. While Palantir remains a profitable and fast-growing AI software company, the exit by a high-profile investor and ongoing debates about its valuation have weighed on sentiment, aligning the stock's decline with both macro market softness and company-specific rotation.