Good stuff!

FWIW, I think the list on release posts is the same as that returned by the credits API. It may be a more consumable/reliable source to refresh over time.

If you haven’t seen it yet, Jean-Baptiste Audras has been compiling various stats for releases. That data could help track employer changes, at least since 5.4.

Actually seeing a list of code changes per employer would probably require re-scanning commit messages in core and pull requests in Gutenberg to match names and rebuild the log as employer focused.

And along the same lines, but way wackier: use git/svn blame data to see what percentage of core was last touched by employer. 🙃