Bangor Market and Institutions Company Ltd. records 1854-1980 - details of extant records on Archives Network Wales
"In 1855, and Act of Parliament authorised the creation of Bangor Market and Public Institutions Company Ltd. to construct and manage a market house and other buildings in Bangor............"

Carter, Vincent & Co., Solicitors, Papers  1747-1925 - details of extant records on Archives Network Wales
"Carter, Vincent & Co., Solicitors, of Bangor operated in North Wales during the 19th and 20th centuries, dealing with property and individuals in Anglesey, Caernarfonshire and Merionethshire..." Papers of Elwyn Jones and Co., Solicitors,  1575-1940  - details of extant records on Archives Network Wales
"Elwyn Jones and Co., Solicitors, were based in Bangor... The firm dealt with estates in Anglesey, Caernarfonshire and Merionethshire during the 19th and 20th centuries, and accumulated papers relating to its clients' interests...."

• TNA provide:
  • A very useful  Research Guide: Companies and business
  • Their National Register of Archives (NRA) ("Discovery") is particularly useful for finding the location of the archived records of named organisations
• The Association of Business Historians creates and disseminates knowledge about business history.
• TNA hold some railway company records. (Ancestry provides subscription access to the TNA's railway employment records 1833-1958, from a number of historic railway companies.)
• Some employers' and trade association archives are held by Warwick University's Modern Record Centre.
• Trade directories can provide some information (including advertisements) about businesses, large and small, through the years.
• Railway Work, Life and Death - records of railway worker accidents in Britain between 1911 and 1915 - "a joint initiative between the University of Portsmouth and the National Railway Museum (NRM)".
• The John Lewis Memory Store: ". . . a living history of John Lewis & Partners. Through the site, people share their memories, photos, maps and information about John Lewis & Partners, past and present."
• United Kingdom Cemetery Records, from Interment.net.