Thomas Miller Specialty provides marine covers including P&I, Hull & Machinery and Kidnap & Ransom from its London headquarters. P&I cover is available for limits up to USD 500 million (sub-limited to USD 1 million for US domiciled insureds).

It offers cover for dry cargo vessels of up to 25,000 gross tons and all other vessel types to a maximum of 10,000 gross tons.

In late 2015 the Agency was purchased by Thomas Miller Group, managers of the UK P&I Club, becoming its designated commercial Specialty insurer. The most obvious immediate benefit to an insured owner is access to Thomas Miller's international claims network.

The insurer recorded a 9.1% reduction in annual premium income in the last year to USD 25 million.

The majority of its insured vessels are Tugs / Barges (31%), and Fishing vessels (30%). While its share of business in North America has declined in recent years, it still remains the most important region for insured tonnage, representing 46% of Thomas Miller Specialty's insured vessels.