Lyriant Advisory is the successor to an investigations and due diligence practice originally established in Asia in 2003 as Spectrum OSO Asia, which subsequently traded as Spectrum Asia from 2013. In 2007, Spectrum OSO Asia acquired Corporate Discretionary Services, a specialist provider of investigation and security services in the Philippines and China.

Following this acquisition, the business grew to become one of the largest independent providers of business intelligence, due diligence, investigation and risk mitigation services in the Asia Pacific region.

In 2019, with a number of Spectrum Asia shareholders no longer wishing to take an active role in the business and seeking to retire, James Margetts, Tom Parker and David Tuck acquired key operating entity Spectrum OSO Asia Co Ltd as a going concern and traded as Spectrum Asia Partners until re-branding as Lyriant Advisory in October 2020.

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