Then, short seller Andrew Left of Citron Research said PLTR stock was "detached from fundamentals and analysis". He's certainly not the first one to suggest that the Palantir rally has gone too far. However,

Palantir Technologies has created one of the most dramatic stories on Wall Street this year, defying conventional investment narratives. In 2025, it became the top-performing stock in the S&P 500, surging over 106% and at points climbing 144% from the start of the year—outpacing even AI heavyweights like Nvidia.