Stephen Miller, President Donald Trump's powerful deputy chief of staff and homeland security advisor, is more than just the architect of the administration's hardline immigration policies: He has a personal financial stake in them. Miller disclosed from $100,001 up to a quarter million dollars of stock in Palantir, a tech company woven into the operations of US Immigration and Customs Enforcement (ICE) and used by other federal agencies such as the Pentagon. That stock ownership is previously unreported; this new information comes from his financial disclosure, recently released by the White House. Ethics experts say Miller's deep involvement in ICE's efforts and his financial stake in Palantir raises conflict of interest concerns. Palantir is the highest performing company in the S&P 500 this year. Its stock price is up by over 80% in 2025 so far.