Fitch Ratings affirmed the ratings of multiple midtier banks, following a periodic review of the sector.

The agency affirmed Wintrust Financial Corp.'s long-term issuer default rating at BBB+ and short-term issuer default rating at F2. The ratings outlook is stable.

Fitch affirmed East West Bancorp Inc. long-term issuer default rating at BBB, while its F2 short-term issuer default rating remains under criteria observation, where it was placed on May 2. The outlook is stable.

First Horizon National Corp.'s long-term issuer default rating was also affirmed at BBB. Fitch Ratings upgraded its short-term issuer default rating to F2 from F3. The outlook is stable.

Umpqua Holdings Corp.'s long- and short-term issuer default ratings were affirmed at BBB+ and F2, respectively. The outlook is stable.

Fitch Ratings affirmed BOK Financial Corp.'s long- and short-term issuer default ratings at A and F1, respectively. The outlook is stable.

BankUnited Inc. and BankUnited NA's long-term issuer default ratings were affirmed at BBB. BankUnited Inc.'s F2 short-term issuer default rating remains under criteria observation, where it was placed on May 2. The ratings outlook was revised to stable from negative.

Fitch affirmed UMB Financial Corp.'s long-term issuer default rating at A and its short-term issuer default rating at F1. The ratings outlook remains negative.

Synovus Financial Corp.'s BBB- long-term issuer default rating was affirmed by the agency. The ratings outlook remains positive.