 Since January 2015 West Ham 's shirts have been sponsored by <unk> . Previous sponsors have included <unk> Trust ( 1983 – 89 ) , BAC Windows ( 1989 – 93 ) , Dagenham Motors ( 1993 – 97 ) , Dr. Martens ( 1998 – 2003 ) , <unk> ( 2003 – 07 ) , <unk> ( 2007 – 08 ) , SBOBET ( 2008 – 13 ) , and Alpari FX ( 2013 – 15 ) . The deal with XL ended early due to the XL Leisure Group being placed in administration in September 2008 . During this period , players had their squad numbers ironed over the existing sponsorship logo , before a deal with SBOBET was finalised . The deal with Alpari also ended early , because of the sponsor entering liquidation . 
