OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has affirmed the Long-Term Issue Credit Rating (Long-Term IR) of “a” on $800 million Floating Rate Insured Notes due 2037 (notes) issued by Northwind Holdings, LLC (Northwind Holdings), a Delaware limited liability company and wholly owned subsidiary of Unum Group (Unum). The outlook of the Long-Term IR is stable. Northwind Holdings was formed for the limited purpose of holding the stock of Northwind Reinsurance Company (Northwind Re), issuing the notes