Shares in Palantir Technologies (PLTR) fell Friday on a report that a prototype battlefield communications network being developed by the software maker and Anduril Industries has security problems. With Friday's retreat, Palantir stock has gained over 135% in 2025. The prototype battlefield communications network is rife with "fundamental security" problems and vulnerabilities, and should be treated as a "very high risk," according to a recent internal Army memo, said a Reuters report. On the stock market ...