Insights into top contributors' employment

Would be great if we could have data for the employers for git pushes.
Assigning the employee to an account may not be trivial, but through the email address or the orgs they belong, it might be feasible.

Would be great to see the top companies contributing to open-source, as well as the top universities (both globally and per region).

Thank you!

P.S.: I'm going to have 250+ students submitting patches to various github projects soon. I would be trilled to see the impact and benchmark it against other universities. They are required to use the university email address in the commits and github account.