I can't find the source so this is from memory; but Karp or Theil said they wouldn't ever go public and essentially can't because they are essentially a DoD contractor. While other companies notably do similar things and other contractors are public, Palantir provides a unique platform to some extent and their customer base, much of their technology and operations are secret. It is known they will not likely go publi…
All is not friendly in the shire, remember this post from a few years ago? https://www.quora.com/When-will-Palantir-go-public
* left palantir in 09
* is a major shareholder
* left after he "had successfully replaced myself in both parts of the company we'd created and had fully vested".
So I am not going to speculate whether he was pushed out, but it sounds like he has much less latitude for steering the company. Especially when you consider the power of the other founders and the initial VC capital that was put in. So this (claims of palantir going public) are what I would expect a major shareholder without control of the company to say. It is effectively the only way to put pressure on them.
Even if this is wildly incorrect, and it quite possibly is, that comment was made several years after he had little more than an advisory role at palantir.