[3] The warehouse owner appealed to the Supreme Court, which granted certiorari to resolve a circuit split "regarding the citizenship of unincorporated entities.

"[3] Writing for a unanimous Court, Justice Sonia Sotomayor held that for the purposes of diversity jurisdiction, the citizenship of a real estate investment trust should be determined by the citizenship of its shareholders when the real estate investment trust is "held and managed for the benefit and profit of any person who may become a shareholder".

[8] In the mid-nineteenth century, the Supreme Court has clarified that for the purposes of determining citizenship, a corporation should be considered a citizen of the state in which it is incorporated.

"[3] Writing for a unanimous Court, Justice Sonia Sotomayor held that real estate investment trusts, as defined by Maryland law, should be treated like other unincorporated entities when determining diversity jurisdiction.

"[5] Mann also observed that "Chief Justice John Roberts has not yet assigned any major opinions to Sotomayor, and this case leaves that pattern intact.