Palantir Technologies Inc. (NYSE:PLTR) is under investigation by the UK's National Health Service (NHS) for potentially breaching contract terms related to marketing activities. The breach concerns an influencer marketing campaign by Topham Guerin, which was not approved by NHS England as required by the contract. Palantir, which won a £330 million contract with Accenture Plc to build the NHS Federated Data Platform, has stopped working with Topham Guerin and described the campaign as an 'exploratory project.' The Good Law Project has raised concerns about Palantir's handling of private medical data and transparency of the data processing platform.