Examples of corporations expressing religious beliefs: https://www.washingtonpost.com/news/the-fix/wp/2014/03/24/he...

Per above: "Hobby Lobby and Conestoga Wood Specialties' argument for not providing emergency contraception and IUD coverage to their employees can be boiled down to this: Because of the religious nature of our companies, we are entitled to religious freedom exemption from the Affordable Care Act's mandate because of the Religious Freedom Restoration Act — the same exemption that has been afforded to nonprofits with a religious nature."

Granted, it's the people who run (and presumably own) these corporations that truly have religious beliefs. Even so, from a legal standpoint, it's the corporations that bring suit.