. the company further divides its direct asbestos exposures into the following categories : major asbestos defendants ( the 201ctop 70 201d accounts in tillinghast 2019s published tiers 1 and 2 and wellington accounts ) , which are subdivided further as : structured settlements , wellington , other major asbestos defendants , accounts with future expected exposures greater than $ 2.5 , accounts with future expected exposures less than $ 2.5 , and unallocated