| Accenture | Ford | Pennon Group |
| ACT Training | Freesat (UK) Limited | PepsiCo UK and Ireland |
| Addo Food Group | Freshfields Bruckhaus Deringer | Pfizer |
| ADI Group | Fujitsu | Phoenix Group |
| AF Blakemore & Son Ltd | FUTURE INDUSTRIAL SERVICES LIMITED | PIMCO Europe |
| Aldi UK & Ireland | Futures Housing Group | Pinsent Masons LLP |
| Allianz (UK) | Gamesys Group | Platinum Facilities & Maintenance Services Limited |
| Amazon | General Medical Council | Post Office |
| Amey | Gilbert-Ash Limited | Premier Oil |
| Anglian Water Group | Glasgow Caledonian University | Principality Building Society |
| Anglo American | GlaxoSmithKline | Project One Consulting Limited |
| Anthesis Consulting Group plc | Glen Dimplex Home Appliances | Prowrap Group - Wrapex Ltd / Procare UK Ltd |
| Arm | Glenmorangie Company | Public Health England |
| Arup | Goldman Sachs International | PwC |
| ASDA Stores Ltd | Google | QuestGates |
| Associated British Foods | Gower College Swansea | Quintessential Brands |
| Association of Accounting Technicians | Gowling WLG (Wragge) | Reckitt Benckiser |
| Assurant | Graham | Reward Gateway |
| AstraZeneca | Grant Thornton | RHA Wales |
| Audit Scotland | Grayce | Ricardo |
| Autotrader | Greggs | Ricoh UK |
| AVIVA PLC | Gresham Technologies plc | Robertson Group |
| AWE | Gymshark Limited | Roche Products Ltd |
| AXA | Hachette UK | Rolls-Royce |
| AXIS Capital Holdings | Heathrow Airport Limited | Royal London Group |
| Bain & Company | Henry Boot plc | ROYAL MAIL GROUP LIMITED |
| Bank of America | Herbalife Nutrition | Ryder Architecture Ltd |
| Barclays | Heron Bros Ltd | Salesforce.com |
| Baringa Partners | Higgs LLP | Samworth Brothers (Holdings) |
| BASF plc | High Speed 2 Limited | Santander UK |
| BBC | Hiscox UK | SC Johnson |
| BCS Consulting | HM Revenue and Customs | ScotRail |
| Beaverbrooks the Jewellers | Hodge Group | Scottish Qualifications Authority |
| Bentley Motors Limited | Hogan Lovells International LLP | Scottish Water |
| Bettys & Taylors Group Ltd | Home Instead Senior Care | Secure Trust Bank |
| BigChange | Homeserve PLC | Sedgwick |
| Birmingham City Council | Houses of Parliament Restoration and Renewal | Serco |
| Bishop Fleming | HSB Engineering Insurance | Severn Trent |
| Blaser Mills LLP | HSBC Bank | Shakespeare Martineau LLP |
| Bluestone National Park Resort | Huddersfield Business School, University of Huddersfield | Sheffield Hallam University |
| BMG Music Publishing | IBM UK | Shell UK |
| BNP Paribas | Iceland Foods Ltd. | Shoosmiths LLP |
| Bowmer & Kirkland | Innovate Trust | SHS Group Ltd |
| bp | InterContinental Hotels Group | Siemens PLC |
| Brewin Dolphin Holdings | Irwin Mitchell | Sky |
| Bristol Airport | ISS UK | Societe Generale |
| Brit Insurance Holdings | J Sainsbury | Sodexo |
| BritainThinks | J. Murphy & Sons Limited | Solenis |
| British Airways | Jacobs | South Wales Police |
| British Land | Jaguar Land Rover | Sovereign Housing Association |
| Brother Industries UK (Wales) | JC Decaux | Spencer Stuart |
| Browne Jacobson LLP | Jehu Group | Sport England |
| BT | JLL | SPTS Technologies |
| Bupa | John Lewis Partnership/Waitrose | St James's Place |
| Burger King | Johnson Service Group | Standard Chartered |
| Burges Salmon | Joseph Rowntree Foundation | Stantec |
| Burns Pet Nutrition Ltd | JTI | Swansea Building Society |
| CALA GROUP LIMITED | Keenan Recycling Ltd | TalkTalk Telecom Group plc |
| CalMac Ferries Ltd | Kier Group | TAQA Bratani Limited |
| Calor Gas Ltd | Kingspan Group | Teesside University |
| CanPack Group | Knight Frank | Teleperformance |
| Capgemini | KPMG | Teneo |
| Capita Group | Landmarc Support Services Limited | TESCO PLC |
| Capital One | Leeds Building Society | Thales Group |
| Capsticks Solicitors | Legal & General Group Plc | Thames Water |
| Cardiff and Vale College | LexisNexis Risk Solutions | The Co-operative |
| Cardiff Business School | Linc-Cymru Housing Association | The Crown Estate |
| Cardiff Metropolitan University | Lincolnshire Co-operative | The Eden Project |
| Castell Howell Foods | Linklaters | The Football Association (FA) |
| Central England Co-operative | Liverpool John Moores University | The Go-Ahead Group |
| Centrica | Liverpool Victoria General Insurance | The Midcounties Co-operative |
| Checkout | Livewest Homes Limited | The Scottish Salmon Company Ltd |
| CHEP | Livin Housing Ltd | The Southern Co-op |
| Chevron U.K. Ltd | Lloyds Banking Group | The University of Birmingham |
| Cisco | LNER | Tideway |
| CITIZEN Housing | Local Government and Social Care Ombudsman (LGO) | Timpson Ltd |
| City & Guilds Group | London Borough of Barking and Dagenham | TJX Europe (TK Maxx) |
| CityFibre | London Stock Exchange Group | TLT LLP |
| Cleone Foods | Longevity Partners | Toyota Motor Manufacturing (UK) |
| CMS Cameron McKenna Nabarro Olswang LLP | Manchester Airports Group | Transport for the West Midlands |
| CNOOC International | Marks & Spencer | TransUnion |
| Columbia Threadneedle Investments | Marsh | Trivallis Ltd |
| Company Shop Group | Mayborn Group | TSB Bank plc |
| Cooley LLP | McCann Worldgroup | UBS |
| Costain Group | McKinsey | UK Greetings Ltd. |
| Covéa Insurance | Mercer Limited | Unilever |
| Coventry & Warwickshire Champions | Microsoft | Unipart Group |
| Coventry Building Society | Monmouthshire Building Society | Unite Students |
| Crown Estate Scotland | Morgan Stanley | United Utilities |
| Crown Workspace Limited | MSS Group | University of Hull, Faculty of Business, Law and Politics |
| Deloitte LLP | MTR Elizabeth line | University of Leeds |
| Department for Transport | MVF Global | University of Manchester |
| Derwent London | MWH Treatment Ltd | University of South Wales |
| Development Bank of Wales | National Grid | University of Warwick |
| Diageo | Nationwide | Unum |
| Direct Line Group | NATS | UPS Ltd |
| Dixons Carphone | NatWest Group | V12 Retail Finance |
| Dolmans Solicitors | NCC Group | Veolia |
| Drax Group PLC | Network Rail | Verizon UK Limited |
| DWF LLP | Network Recruitment Wales Ltd | Vertex |
| Dwr Cymru Welsh Water | Newcastle Building Society | Via East Midlands |
| East Midlands Railway | Newcastle Business School | Victrex plc |
| easyJet | Nexba | VVB Engineering |
| EcoAct | Next PLC | Wales & West Utilities Ltd |
| EDF Energy | NFU Mutual Insurance Co | Walgreens Boots Alliance |
| Educ8 Training | Nike (UK) | Watts Truck & Van |
| Efficiency North Holdings Ltd | Noble Foods | Wells Fargo |
| Eigen Technologies Inc | Nominet | Wesleyan Assurance Society |
| Electricity North West Ltd | North Star Housing Group | Westmorland |
| EMCOR (UK) | Northern Gas Networks | Whyte & MacKay |
| Emerald Group Publishing | Northumbria University | WildHearts |
| Encirc | Northumbrian Water Group | Wincanton |
| ENGIE SERVICES LIMITED | Norton Rose Fulbright | WJ Group |
| Enterprise Rent-A-Car | Nottingham Trent University | Wm. Morrison Supermarkets PLC |
| Equinix | Nottingham University Business School | Worldline |
| Essentra PLC | NPTC Group of Colleges | Worley |
| Eurovia UK Ltd | NRS Healthcare | WPP Group |
| Eversheds Sutherland | Office for National Statistics | Wright, Johnston & Mackenzie LLP |
| Facebook Inc | Oracle Corporation UK | XPS Pensions Group |
| Federated Hermes | Orbit Group Ltd | YMCA St Pauls Group |
| Financial Services Compensation Scheme | Paragon Banking Group | Yorkshire Building Society |
| Finning Group (UK) | Pawprint | Zimmer Biomet UK Ltd |
| Fitch Ratings Ltd | Pearson | |
