That's according to the Whistleblower, which could be accurate or not accurate. The problem is knowing.
IF... we choose to believe the whistleblower, then it would appear that Palantir worked on the facebook data at CA offices, for CA. Whether that's right or wrong, they didn't acquire the data for CA and then help them process it. As for high level players working closely, the whistleblower said that CA CEO Alexander Nix was introduced to Palantir executives. I'm sure they were.... people mingle and swap business cards etc...
- Palantir Technologies UK is providing the software, Palantir Foundry, that powers the front end data platform. Palantir Foundry, which has been primarily developed in the UK, enables disparate data to be integrated, cleaned, and harmonised in order to develop the single source of truth that will support decision-making. Foundry is built to protect data by design. A G-cloud data processing contract is in place. Palantir is a data processor, not a data controller, and cannot pass on or use the data for any wider purpose without the permission of NHS England
The quote above is the government's declaration on them. It looks pretty solid to me, but it's a question of whether you believe they will truly dispose of or dump the data after it's used. And that gains or loses relevance depending on what data is collected in the first place....
That's what we don't know yet....