The surviving records of Helbert, Wagg's corporate finance activity largely consist of files pertaining to its British manufacturing or financial trust clients, although there are a small number of overseas clients of this type. The records also cover overseas bond issues of the interwar period for the Free City of Danzig, Iceland, the City of Greater Prague, the Kingdom of Romania and the Department of the Seine.
Corporate clients or transactions involving corporate bodies include those listed below.
- A.J. Mills
- Aaronson Brothers
- Albert E. Read
- Alfred Herbert
- Allied Insulators
- Ambrose Shardlow
- Ames Crosta Mills
- Anglo Transvaal Consolidated
- Aplin and Barrett
- Asquith Machine Tool
- Australian Mercantile Land and Finance
- Babcox and Wilcox
- Baldwins
- Banque de Bruxelles
- Banque de Credit Roumain
- Barclay Perkins
- Beeston Boiler
- Ben Hall & Son
- Bifurcated and Tubular Rivet
- Bleachers Association
- Bradbury, Agnew
- Bridgwater and District Electric Supply and Traction
- British and Hungarian Bank
- British Brewers
- British Lead Mills
- British Paints
- British Petroleum
- British Steam Specialities
- British Sugar Corporation
- Briton Ferry Steel
- Bromilow and Edwards
- C.W. Martin & Sons
- Calders
- Charles S. Madan
- Cheesbrough Ponds
- City Centre Properties
- City of London Real Property
- Clinton Foods
- Colthrop Board and Paper Mills
- Colville Estate
- Commercial Plastics
- Concordia Bergbau
- Consolidated Gold Fields of South Africa
- Credit Anstalt
- Cropper
- Crossley Building Products
- Cut-Outs Cartons
- Dax
- Deutsche Rentenbank Kreditanstalt
- Disconto Gesellschaft
- Dowsett Holdings
- Duport
- Elin Electricity
- Empire Trust
- English Beet Sugar
- English China Clays
- Enka Artificial Silk
- Ericsson Telephones
- Eron Investments
- F. Issels
- Feldmuehle Papier und Zellstoffwerke
- Fine Spinners and Doublers
- Finsbury Estates
- First American
- Fishburn Printing Ink
- Ford Motor
- Fox Theatres
- Franco Signs
- Fremlins
- Gainsborough Cornard
- Gebrüder Körting
- Geigy Holdings
- George Newnes
- General Real Estates Investments and Trust
- General Refractories Group
- H.J. Heinz
- Hamburg Amerika Line
- Hammonds United Breweries
- Hardman and Holden
- Hart and Levy
- Heyl-Beringer Farbenfabriken
- Hicking Pentecost
- Hollandia Dutch Mill
- Hollas Textile
- Hoover
- Horlicks
- Hornflowa
- Howard de Walden Estates
- Hulton Press
- IBM United Kingdom
- I.H. Lavery
- Imperial Typewriters
- Incandescent Heat
- International Combustion Holdings
- International Mortgage Bank
- Internationale Boden Kreditbank
- J. Chadwick
- J.C. Prestwich
- J. Nimmo & Son
- J. Stone
- James A. Jobling
- James V. Rank
- Jardine Henderson
- John Readhead & Sons
- John Reddihough
- John Summers & Sons
- John Taylor
- Keelavite Rotary Pumps and Motors
- Kelvin and Hughes
- Kings Lynn Beet Sugar
- Kokswerke and Chemische
- L. Rose
- Labouchere
- Lancashire Tar Distillers
- Las Cabezas Estancias
- Leyland Motors
- Linotype and Machinery
- Lvov-Cernauti-Jassy Railway
- M. Samuel
- Mackuba
- Madlener
- Magasins du Louvre
- Mann, Crossman and Paulin
- Mansfield Brewery
- Marconi
- Marshall Sons
- Matthew Hall
- Mauritius Agricultural Bank
- Melbourne Hart
- Mellor Bromley
- Meridian Airmaps
- Metal Pressing and Enamelling
- Metallbank
- Metallgesellschaft
- Middle Docks and Engineering
- Millom and Askam Hematite Iron
- Miln
- Mitchells and Butlers
- Mod-X Holdings
- Moira Investments
- Montreal London and General Investors
- Montrose Chemicals
- National Steel
- Neo Cell
- Neuchatel Asphalte
- News Holdings
- Nobel Industries
- Noble and Lund
- North German Lloyd
- Northern Assurance
- Olympic Portland Cement
- Osakeyhtioe Waldhof
- Palumbo Property Interests
- Paris Real Estate
- Park Gate Iron and Steel
- Paterson Engineering
- Petrofina
- Philco
- Photo-Produits Gevaert
- Platers and Stampers
- Poppe, Schunhoff, Guttery
- Portalis
- Powell Duffryn
- Premier Cotton
- Pressed Steel
- Preussische Central Boden Kredit
- R. & J. Dick
- R.J. Maxwell & Sons
- Raleigh Industries
- Reeves Whitburn
- Renold Chains
- Revo Electric
- Rhodesian Oil and Steel Commission
- Rio de Janeiro Land, Mortgage and Investment Agency
- Rockware Glass
- Rotterdamsche Bank
- Rubber Corporation of America
- Ruzawi School
- S. Smiths & Sons
- Salts (Saltaire)
- Sangamo Weston
- Sankey Sugar
- Scottish Brewers
- Scottish Cables
- Scottish Gas
- Sedgwick Collins
- Seigals
- Sena Sugar Estates
- Shell-Mex
- Siemens Brothers
- Simoniz (England)
- Site Improvements
- Small and Parkes
- Smith Corona
- South American Gold and Platinum
- South American Saint Line
- Specialloid
- Spicers
- Spooner Food Machinery Engineering
- Standard Bank of South Africa
- Standard Motor
- Staples Printers
- Star and Simcett
- Staveley Investment Trust
- Steel Company of Wales
- Stewarts and Lloyds
- Storey Brothers
- Sturtevant Engineering
- Sunderland Shipbuilding Dry Docks and Engineering
- Tate and Lyle
- Textile Trades
- Thames Steam Tug and Lighterage
- Thomas Tilling
- Toronto and London Investment Trust
- Toronto Industrial Leaseholds
- Tozer, Kemsley and Millbourn Holdings
- Traction and General Securities
- Triarch Corporation
- Tube Investments
- Tyne Brand Products
- Union International de Placements
- United Molasses
- United Premier Oil and Cake
- United Steel Companies
- United States Leasing
- Van Nievelt Goudrian
- Vantona Textiles
- Venesta
- Venner
- Vermiculite (Proprietary)
- Vick International
- Vono Industrial Products
- Wadkin
- Walkers (Century Oils)
- Waterlow & Sons
- Webb and Knapp (Canada)
- West Indies Sugar
- Wets Norfolk Farmers Manure and Chemical Co-operative
- Western Market Development
- Westland Aircraft
- Whittaker Ellis
- William H. Muller
- Williams and Humbert
- Woermann Line
- Zellstofffabrik Waldhof