Westhouse Securities LLP was formed in 2004 with the demerger of Brown Shipley's corporate finance and broking business into a new company part owned by Kredietbank SA Luxembourgeoise ("KBL") and part by management. In July 2006 KBL sold their interest in Westhouse to management and the Hanson family. The business, by then called Hanson Westhouse LLP, was converted into a limited company, Hanson Westhouse Limited, in January 2007.
In order to further develop the business and expand its capital base, Hanson Westhouse undertook a reverse takeover of AIM quoted SovGEM Limited in June 2009 to create AIM quoted Hanson Westhouse Holdings plc.
Following completion of the reverse takeover, the Hanson family stake was placed out in October 2009, the holding company renamed Westhouse Holdings plc and its regulated operating business Westhouse Securities Limited.
Westhouse started its market making operation in April 2010 and in August 2010 the Bermuda Commercial Bank subscribed for £3.5m of a Perpetual Convertible Loan Note.
In December 2010 Westhouse acquired Smith's Corporate Advisory, an independent corporate broking and investor relations business. That month it also acquired an Investment Funds team.
In November 2011 Westhouse announced the acquisition of Arbuthnot Securities, the transaction being completed after FSA consent in January 2012. The two businesses which were highly complementary were integrated under the name Westhouse.