I have put together a number of tracking systems for public companies. They look at things like news articles and patent filings, and I got my list straight from the NYSE.
What's missing now is subsidiary data.
Public companies have to publish lists of their subsidiaries, and I'm looking to get that list. Thoughts? I usually go to Quandl with these sorts of questions, but they don't seem to have that. Neither does the NYSE.
Let me know if you need any other information.