Posted in Web Flagstar Bank, FSB Reviews and Ratings – Bankrate.com May 19, 2019 Founded in 1987, Flagstar Bank, FSB is an FDIC-insured bank based in Troy, MI. Regulatory filings show the bank having equity of $1.66 billion on $16.86 billion in assets, as of December 31, 2017. : https://www.bankrate.com/banks/flagstar-bank-fsb/146672/