[7] The company became the world's largest tanker broker in 1929 when Esso appointed Clarksons as its exclusive shipbroker.

[9] The company became a global force and Greig increased its business, especially with Esso, bringing in Brazil, Norway and the Far East to its portfolio.

[11] According to Robert Wright of the Financial Times, he was central to Clarkson's emergence as the world's largest sale and purchase shipbroker.

[12] Until March 2012, Martin Stopford, a prominent economist, sat on the board and was head of the research arm of the company.

[7] In 2015, Clarkson acquired RS Platou AS, a Norwegian headed shipbroking and investment banking group.

[15] Clarkson Research Services focuses primarily on the collection, validation, analysis and management of data about the merchant shipping and offshore markets.