Which NFL team is publicly owned by its fans as shareholders?

Which team plays at Mercedes-Benz Stadium? Which team plays at NRG Stadium? Which team plays at State Farm Stadium in Glendale, Arizona? Which team plays at Bank of America Stadium? Which NFL team plays in the smallest market? Which team moved from Oakland to Las Vegas in 2020? Which team moved from San Diego to Los Angeles in 2017? Which team moved from St. Louis back to Los Angeles in 2016?