Per Forbes...
The Panthers are 26th on the list at 4.1 billion. A little over twice what David Tepper paid for it if I remember correctly.
The teams below the Panthers in value are the Saints (4.08 B) Jaguars (4.0 B) Cardinals (3.8 B) Bills (3.7 B) Lions (3.6 B) and Bengals (3.5 B)