I would like to attribute how many medals each person in a Spartan Company has contributed to the Commendations. Doing this requires access to when a Spartan joined a Spartan Company. Medal aggregation will take a while across all players in the Company, but the necessary API is already there. Is that information accessible elsewhere, or might it be added in the future?
There is sadly no Company integration in the API. You can check the thread right below this one for a sort of hack to get some stuff working, but that wouldn’t include what you are looking for I don’t think.
I’m the one who wrote that hack. 
Figured it was a long shot, but wanted to ask just to make sure I didn’t miss anything. If I could find it anywhere that would be great, but as far as I can tell that information isn’t publicly available.