Overstone enables clients to use art as an asset class through data and domain expertise delivered through our Art Risk Monitor ™ and Qualitative Risk Monitor ™, and the solutions they support.

Overstone was founded in 2012 by Harco van den Oever to help clients overcome the opacity of art as an alternative asset.

Overstone is FCA regulated as an appointed representative through Laven Advisors LLP as of March 2015.




harco van den oever

Founder & CEO

Harco served 12 years at Christie’s as Continental European Head and Global Managing Director of the Impressionist and Modern Art Department prior to founding Overstone Art Services. With 12 years in debt capital markets under his belt at Paribas, Bankers Trust, and Credit Suisse First Boston, Harco also founded, the UK's first online mortgage brokerage business, acquired in 2001 by Netwindfall Ltd. 

Harco has an MBA from University of Hartford and is an INSEAD alumnus.


Claude Cochin de Billy


Claude’s began his 35 year banking career at Bankers Trust heading credit trading and capital markets. He then headed Deutsche Bank’s European consumer, retail & luxury investment banking division, and built and led their family office group. In 2007 Claude joined UBS as co-head of their global family office group, moving to Kleinwort Benson in 2013 as a member of the executive committee. Following KB's sale, Claude became Managing Partner of Global Family Partners, a multi-family office focused on direct investments.


Olivia Faure romanielli

Legal & Compliance

Olivia is a qualified solicitor in both France and the US, and is a member of the Paris and New York Bars. Following 4 years of private practice with Hogan Lovells in Intellectual Property law, Olivia spent 8 years with Sotheby’s in-house legal department as Associate General Legal Counsel before joining Overstone. 

Olivia has a post graduate degree from Paris University of Law and is a New York University Law School alumnus. 



Head of Operations

Chen has 10 year’s experience in institutional museums and the art market. Beginning as Museum Educator at the Israel Museum, Jerusalem, Chen was later Deputy Curator at Israel’s largest corporate collection with Discount Bank. In 2015, she joined Christie’s London Impressionist and Modern Art team. Chen has also led projects for various galleries and museums, including Sommer Contemporary Art and the Louvre-Paris, and sits on the Committee board of Young British Friends of the Art Museums of Israel (BFAMI).

Chen holds a Masters in Art History & Archaeology with Distinction from The Hebrew University of Jerusalem and an MBA from INSEAD. 


Mauro arnoldi

Head of Data Science

Mauro launched his 10 year career in Data Science managing projects with various startups and SMEs in Italy, before relocating to the UK innovating data driven models for large technology dependant companies including William Hill Online and O2. His diverse set of roles as an engineering manager, consultant, software analyst, quality manger and data scientist, have made him highly experienced across big data, cloud engineering and data mining implementation.

Mauro holds a Bachelor degree in Economics & Management Engineering from the Università degli Studi di Bergamo, with various certifications from Talend & Jaspersoft.