Hedge funds have been using corporate flight data to predict M&A activity and investments for years (https://www.bloomberg.com/news/articles/2019-07-02/hedge-fun...), but existing data providers are too expensive for most non-professional investors.
I built this free dashboard using publicly-available data from the FAA and the Open-Sky Network.
Companies with multi-plane fleets usually have at least one "anonymously" registered via Aircraft Guaranty or Wells Fargo Trustee Services.
(Feel free to email me if you'd like to talk more about this offline).
I'll look into changing the colors, but you should be able to isolate one group by double-clicking on it.
My tracker also includes planes that are registered to Wells Fargo Trustee Services etc.
I was actually about to publish it.
Email me if you want to discuss this more. We could probably work together on this.